2024 |
Huveneers C, Blount C, Bradshaw CJA, Butcher PA, Lincoln Smith MP, Macbeth WG, et al., 'Shifts in the incidence of shark bites and efficacy of beach-focussed mitigation in Australia', Marine Pollution Bulletin, 198 (2024) [C1]
Shark-human interactions are some of the most pervasive human-wildlife conflicts, and their frequencies are increasing globally. New South Wales (Australia) was the first to imple... [more]
Shark-human interactions are some of the most pervasive human-wildlife conflicts, and their frequencies are increasing globally. New South Wales (Australia) was the first to implement a broad-scale program of shark-bite mitigation in 1937 using shark nets, which expanded in the late 2010s to include non-lethal measures. Using 196 unprovoked shark-human interactions recorded in New South Wales since 1900, we show that bites shifted from being predominantly on swimmers to 79 % on surfers by the 1980s and increased 2¿4-fold. We could not detect differences in the interaction rate at netted versus non-netted beaches since the 2000s, partly because of low incidence and high variance. Although shark-human interactions continued to occur at beaches with tagged-shark listening stations, there were no interactions while SMART drumlines and/or drones were deployed. Our effect-size analyses show that a small increase in the difference between mitigated and non-mitigated beaches could indicate reductions in shark-human interactions. Area-based protection alone is insufficient to reduce shark-human interactions, so we propose a new, globally transferable approach to minimise risk of shark bite more effectively.
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Nova |
2023 |
Ogier EM, Smith DC, Breen S, Gardner C, Gaughan DJ, Gorfine HK, et al., 'Initial impacts of the COVID-19 pandemic on Australian fisheries production, research organisations and assessment: shocks, responses and implications for decision support and resilience', Reviews in Fish Biology and Fisheries, 33 513-534 (2023) [C1]
Australia¿s fisheries have experience in responding individually to specific shocks to stock levels (for example, marine heatwaves, floods) and markets (for example, global financ... [more]
Australia¿s fisheries have experience in responding individually to specific shocks to stock levels (for example, marine heatwaves, floods) and markets (for example, global financial crisis, food safety access barriers). The COVID-19 pandemic was, however, novel in triggering a series of systemic shocks and disruptions to the activities and operating conditions for all Australia¿s commercial fisheries sectors including those of the research agencies that provide the information needed for their sustainable management. While these disruptions have a single root cause¿the public health impacts and containment responses to the COVID-19 pandemic¿their transmission and effects have been varied. We examine both the impacts on Australian fisheries triggered by measures introduced by governments both internationally and domestically in response to the COVID-19 pandemic outbreak, and the countermeasures introduced to support continuity in fisheries and aquaculture production and supply chains. Impacts on fisheries production are identified by comparing annual and monthly catch data for Australia¿s commercial fisheries in 2020 with averages for the last 4¿5¿years. We combine this with a survey of the short-term disruption to and impacts on research organisations engaged in fisheries monitoring and assessment and the adaptive measures they deployed. The dominant impact identified was triggered by containment measures both within Australia and in export receiving countries which led to loss of export markets and domestic dine-in markets for live or fresh seafood. The most heavily impact fisheries included lobster and abalone (exported live) and specific finfishes (exported fresh or sold live domestically), which experienced short-term reductions in both production and price. At the same time, improved prices and demand for seafood sold into domestic retail channels were observed. The impacts observed were both a function of the disruptions due to the COVID-19 pandemic and the countermeasures and support programs introduced by various national and state-level governments across Australia to at least partly mitigate negative impacts on harvesting activities and supply chains. These included protecting fisheries activities from specific restrictive COVID-19 containment measures, pro-actively re-establishing freight links, supporting quota roll-overs, and introducing wage and businesses support packages. Fisheries research organisations were impacted to various degrees, largely determined by the extent to which their field monitoring activities were protected from specific restrictive COVID-19 containment measures by their state-level governments. Responses of these organisations included reducing fisheries dependent and independent data collection as required while developing strategies to continue to provide assessment services, including opportunistic innovations to harvest data from new data sources. Observed short run impacts of the COVID-19 pandemic outbreak has emphasised both the vulnerability of fisheries dependent on export markets, live or fresh markets, and long supply chains and the resilience of fisheries research programs. We suggest that further and more comprehensive analysis over a longer time period of the long-run impacts of subsequent waves of variants, extended pandemic containment measures, autonomous and planned adaptive responses would be beneficial for the development of more effective counter measures for when the next major external shock affects Australian fisheries.
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2022 |
Martin CL, Curley B, Wolfenden K, Green M, Moltschaniwskyj NA, 'The social dimension to the New South Wales Shark Management Strategy, 2015 2020, Australia: Lessons learned', Marine Policy, 141 (2022) [C1]
The future of shark mitigation worldwide, not only depends on economic and environmental considerations but on community support and acceptance of mitigation approaches. Shark mit... [more]
The future of shark mitigation worldwide, not only depends on economic and environmental considerations but on community support and acceptance of mitigation approaches. Shark mitigation strategies and policy development based on publicly held values in combination with expert knowledge is more likely to be supported and accepted by the public and society in general. In 2015, the New South Wales (NSW) government implemented a five-year Shark Management Strategy (SMS) to trial new and emerging technologies following a cluster of shark bites in 2014 and 2015 (including fatalities); most notably on the NSW north coast. The strategy aimed to increase protection of beachgoers while minimising harm to sharks and other marine animals. This paper synthesises various SMS-related social research studies to generate knowledge and improve understanding of community attitudes, support and preferences for different shark mitigation approaches trialled in the SMS. Our findings show non-invasive mitigation approaches involving shark detection and tracking, and public notifications were supported and preferred over invasive and/or lethal approaches such as nets. Drone surveillance was very highly supported (and preferred over helicopters) for being localised, having the capacity to be incorporated into beach safety operations, and with future potential for automation and the use of artificial intelligence to increase detection capability. Community education was seen as a fundamental component of shark mitigation to help people increase their ability to take personal responsibility for their own safety, improve public knowledge and understanding of sharks, and to mitigate fear; ultimately, to foster coexistence without jeopardising public safety.
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Nova |
2021 |
McLuckie C, Moltschaniwskyj N, Gaston T, Dunstan RH, Crompton M, Taylor MD, 'Survival, Growth, and Metabolic Changes in Eastern School Prawn (Metapenaeus macleayi) across a Spectrum of Salinities', Thalassas, 37 97-106 (2021) [C1]
Variation in salinity is one of the principal changes in estuarine physicochemistry that can impact the productivity of estuarine species. The effect of salinity on the mortality,... [more]
Variation in salinity is one of the principal changes in estuarine physicochemistry that can impact the productivity of estuarine species. The effect of salinity on the mortality, growth, and metabolite profiles of juvenile Eastern School Prawn (Metapenaeus macleayi) was evaluated across a salinity gradient ranging from 0.2¿36 over 60¿days. Survival was >70% for salinity treatments other than the lowest salinity. Survival was 0% in the lowest salinity and all prawns had died within 3¿days. Salinity did not appear to impact relative growth across the range of salinities examined. In contrast, relative somatic condition was greater at lower salinities and was negatively correlated with salinity, indicating lower salinities promote enhanced somatic condition in School Prawn. Total fatty acid concentration showed no relationship with salinity or somatic condition index. However, total fatty acid concentration did have a significant positive relationship with total amino acid concentration. Total amino acid concentration showed no linear relationship with salinity or somatic condition index. Quantitative profiling of individual fatty acids and amino acids showed some changes in response to salinity. Alpha-aminoadipic acid showed a significant positive relationship with salinity. These complex patterns suggest several shifts in cellular chemistry may occur throughout the salinity range investigated, potentially with metabolic consequences. These results highlight the complex responses of estuarine crustaceans to changes in salinity.
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Nova |
2021 |
McLuckie C, Moltschaniwskyj N, Gaston T, Taylor MD, 'Effects of reduced pH on an estuarine penaeid shrimp (Metapenaeus macleayi)', ENVIRONMENTAL POLLUTION, 268 (2021) [C1]
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Nova |
2020 |
McLuckie C, Moltschaniwskyj N, Gaston T, Dunstan RH, Crompton M, Butcherine P, et al., 'Lethal and sub-lethal effects of environmentally relevant levels of imidacloprid pesticide to Eastern School Prawn, Metapenaeus macleayi', Science of the Total Environment, 742 (2020) [C1]
Pesticides are frequently employed to enhance agricultural production. Neonicotinoid pesticides (including imidacloprid) are often used to control sucking insects but have been sh... [more]
Pesticides are frequently employed to enhance agricultural production. Neonicotinoid pesticides (including imidacloprid) are often used to control sucking insects but have been shown to impact aquatic crustaceans. Imidacloprid is highly water soluble and has been detected in estuaries where it has been applied in adjacent catchments. We examined the impact of environmentally relevant concentrations of imidacloprid on Eastern School Prawn (Metapenaeus macleayi), an important exploited crustacean in Australia. Prawns were held for 8 days in estuarine water containing 0¿4 µg L-1 of imidacloprid to assess potential lethal and non-lethal impacts. There was a non-linear relationship between exposure concentration and tissue concentration, with tissue concentrations peaking at exposures of 1.4 µg L-1 (1.16 to 1.64 µg L-1, 90% C.I.). There was no evidence for direct mortality associated with imidacloprid exposure, but exposure did influence the organism metabolome which likely reflects alterations in metabolic homeostasis, such as changes in the fatty acid composition which indicate a shift in lipid homeostasis. There was a positive correlation between exposure concentration and moulting frequency. Shedding of the exoskeleton may represent a mechanism through which prawns can expel the contaminant from their bodies. These results indicate that prawns experience several different sub-lethal effects when exposed to these pesticides, which may have implications for the health of populations.
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Nova |
2020 |
Martin CL, Momtaz S, Gaston T, Moltschaniwskyj NA, 'Mapping the intangibles: Cultural ecosystem services derived from Lake Macquarie estuary, New South Wales, Australia', Estuarine, Coastal and Shelf Science, 243 (2020) [C1]
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Nova |
2020 |
Martin CL, Momtaz S, Gaston T, Moltschaniwskyj NA, 'Estuarine cultural ecosystem services valued by local people in New South Wales, Australia, and attributes important for continued supply', Ocean and Coastal Management, 190 (2020) [C1]
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Nova |
2020 |
Mcluckie C, Moltschaniwskyj N, Gaston T, Dunstan RH, Crompton M, Taylor MD, 'Lethal and sublethal effects of simultaneous exposure to hypoxia and aluminium on juvenile eastern school prawn', Marine and Freshwater Research, 71 697-707 (2020) [C1]
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Nova |
2019 |
Harasti D, Davis TR, Jordan A, Erskine L, Moltschaniwskyj N, 'Illegal recreational fishing causes a decline in a fishery targeted species (Snapper: Chrysophrys auratus) within a remote no-take marine protected area', PLOS ONE, 14 (2019)
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2019 |
Taylor MD, Moltschaniwskyj NA, Crompton MJ, Dunstan RH, 'Environmentally Driven Changes in Fatty Acid Profiles of a Commercially Important Penaeid Prawn', Estuaries and Coasts, 42 528-536 (2019) [C1]
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Nova |
2019 |
Pecl GT, Stuart-Smith J, Walsh P, Bray DJ, Kusetic M, Burgess M, et al., 'Redmap Australia: Challenges and Successes With a Large-Scale Citizen Science-Based Approach to Ecological Monitoring and Community Engagement on Climate Change', FRONTIERS IN MARINE SCIENCE, 6 (2019) [C1]
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Nova |
2019 |
Taylor MD, Nilsson S, Braunig J, Bowles KC, Cole V, Moltschaniwskyj NA, Mueller JF, 'Do conventional cooking methods alter concentrations of per- and polyfluoroalkyl substances (PFASs) in seafood?', FOOD AND CHEMICAL TOXICOLOGY, 127 280-287 (2019)
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2019 |
Beard JM, Moltschaniwskyj NA, Crawford CM, Gibson JAE, Ross DJ, 'Using macrofaunal communities to inform estuarine classification', MARINE AND FRESHWATER RESEARCH, 70 371-381 (2019)
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2019 |
Russell A, MacFarlane GR, Nowak B, Moltschaniwskyj NA, Taylor MD, 'Lethal and Sub-Lethal Effects of Aluminium on a Juvenile Penaeid Shrimp', Thalassas: An International Journal of Marine Sciences, 35 359-368 (2019) [C1]
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Nova |
2018 |
Rankin C, Moltschaniwskyj N, Morton J, Wilkie E, 'Shell shape and meat condition in selectively bred Sydney rock oysters, Saccostrea glomerata (Gould, 1850): The influence of grow-out methods', AQUACULTURE RESEARCH, 49 1189-1199 (2018) [C1]
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Nova |
2018 |
Taylor MD, Becker A, Moltschaniwskyj NA, Gaston TF, 'Direct and Indirect Interactions Between Lower Estuarine Mangrove and Saltmarsh Habitats and a Commercially Important Penaeid Shrimp', ESTUARIES AND COASTS, 41 815-826 (2018) [C1]
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Nova |
2018 |
Harasti D, McLuckie C, Gallen C, Malcolm H, Moltschaniwskyj N, 'Assessment of rock pool fish assemblages along a latitudinal gradient', Marine Biodiversity, 48 1147-1158 (2018) [C1]
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Nova |
2018 |
Gleadall IG, Moltschaniwskyj NA, Vidal EAG, 'Preface: Recent advances in knowledge of the life of cephalopods', HYDROBIOLOGIA, 808 1-4 (2018)
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2018 |
Ramos JE, Pecl GT, Moltschaniwskyj NA, Semmens JM, Souza CA, Strugnell JM, 'Population genetic signatures of a climate change driven marine range extension', SCIENTIFIC REPORTS, 8 (2018)
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2018 |
Corry M, Harasti D, Gaston T, Mazumder D, Cresswell T, Moltschaniwskyj N, 'Functional role of the soft coral Dendronephthya australis in the benthic food web of temperate estuaries', MARINE ECOLOGY PROGRESS SERIES, 593 61-72 (2018) [C1]
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Nova |
2017 |
Bakhshalizadeh S, Bani A, Abdolmalaki S, Moltschaniwskyj N, 'Identifying major events in two sturgeons life using pectoral fin spine ring structure: exploring the use of a non-destructive method', Environmental Science and Pollution Research, 24 18554-18562 (2017)
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2017 |
Taylor MD, Bowles KC, Johnson DD, Moltschaniwskyj NA, 'Depuration of perfluoroalkyl substances from the edible tissues of wild-caught invertebrate species', SCIENCE OF THE TOTAL ENVIRONMENT, 581 258-267 (2017) [C1]
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Nova |
2017 |
Taylor MD, Fry B, Becker A, Moltschaniwskyj N, 'Recruitment and connectivity influence the role of seagrass as a penaeid nursery habitat in a wave dominated estuary', SCIENCE OF THE TOTAL ENVIRONMENT, 584 622-630 (2017) [C1]
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Nova |
2017 |
Taylor MD, Fry B, Becker A, Moltschaniwskyj N, 'The role of connectivity and physicochemical conditions in effective habitat of two exploited penaeid species', ECOLOGICAL INDICATORS, 80 1-11 (2017) [C1]
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Nova |
2017 |
Tyler KJ, Becker A, Moltschaniwskyj NA, Taylor MD, 'Rapid salinity changes affect the survival and physiology of a penaeid prawn: Implications of flood events on recruitment to the fishery', Fisheries Management and Ecology, 24 478-487 (2017) [C1]
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Nova |
2017 |
Ochsner A, Belova IV, Murch GE, 'Preface', JOURNAL OF NANO RESEARCH, 47 (2017)
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2016 |
Mendo T, Semmens JM, Lyle JM, Tracey SR, Moltschaniwskyj N, 'Reproductive strategies and energy sources fuelling reproductive growth in a protracted spawner', MARINE BIOLOGY, 163 (2016) [C1]
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Nova |
2016 |
Martin CL, Momtaz S, Gaston T, Moltschaniwskyj NA, 'A systematic quantitative review of coastal and marine cultural ecosystem services: Current status and future research', Marine Policy, 74 25-32 (2016) [C1]
Cultural ecosystem services (CES) are the non-material benefits obtained from ecosystems that contribute to human well-being. They are often under-represented in ecosystem service... [more]
Cultural ecosystem services (CES) are the non-material benefits obtained from ecosystems that contribute to human well-being. They are often under-represented in ecosystem services assessments due to difficulties identifying and valuing intangible attributes. This risks a lack of understanding and consideration of CES by decision-makers. A systematic review was done on coastal and marine CES to identify: geographic distribution of research; effective methods for assessing CES; specific habitats/ecosystems that supply CES; subcategories most frequently addressed; and knowledge gaps. Results revealed limited information exists about coastal and marine CES. There is a disparity in the global distribution of studies with little knowledge about CES in developing countries, as well as a disparity within developed countries; with most research undertaken in Europe and North America. There is a dearth of information on CES derived from specific coastal and marine habitats/ecosystems, reflecting a poor understanding of socio-ecological relationships and the different values people assign to these areas. There is a need to develop indicators with the capacity to measure and track changes in CES over time. Participatory approaches using qualitative methods were most effective in identifying CES; however, these lacked a deliberative element that would provide a comprehensive assessment of shared values in public areas. Overall, publications typically theorised about the usefulness of data on CES to inform and support decision makers, and more research is required on how qualitative data on CES can be represented for practical use by coastal and marine resource managers, and the value of these in the real world.
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Nova |
2016 |
Martin CL, Momtaz S, Jordan A, Moltschaniwskyj NA, 'Exploring recreational fishers' perceptions, attitudes, and support towards a multiple-use marine protected area six years after implementation', Marine Policy, 73 138-145 (2016) [C1]
© 2016 Elsevier LtdThis study assessed the acceptance and awareness of an Australian MPA (Port Stephens-Great Lakes Marine Park) post implementation by recreational fishers using ... [more]
© 2016 Elsevier LtdThis study assessed the acceptance and awareness of an Australian MPA (Port Stephens-Great Lakes Marine Park) post implementation by recreational fishers using the MPA, and identified factors that influenced the perception of this group towards the MPA. Recreational fishers were interviewed in a multiple-use MPA to investigate their perceptions, attitudes, and support towards the MPA six years after implementation. Almost two thirds of recreational fishers supported the MPA and had positive attitudes towards the concept of MPAs. This is a key result since a similar pre-implementation survey of recreational fishers found only 12% would support the creation of PSGLMP due to fears the MPA would negatively impact their fishing activities and ability to catch fish. However, there was a sub-group of fishers who opposed the MPA and were more inclined to have negative attitudes towards the rationale behind MPAs, despite the common perception that no-take zones were for fisheries management purposes and could increase fish stocks in the MPA. More experienced fishers were inclined to oppose the MPA, as well as fishers who believed management zones did not provide clear rules for activities, penalties for non-compliance were too harsh, or that no-take zones did not increase fish stocks. An important perceived threat to the MPA was from commercial fishing due to perceptions of over-exploitation and issues of non-compliance. In contrast, the majority of recreational fishers did not believe the collective actions of recreational fishers negatively impacted the marine environment and fish stocks, or the number of fish available for capture in the future. An improved understanding of these social aspects is important to target ongoing management in order to increase acceptance, success and long-term existence of MPAs.
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Nova |
2015 |
Martin CL, Momtaz S, Jordan A, Moltschaniwskyj NA, 'An assessment of the effectiveness of in-situ signage in multiple-use marine protected areas in providing information to different recreational users', Marine Policy, 56 78-85 (2015) [C1]
In-situ signage is a cost effective environmental education tool used in marine protected area (MPA) management, and the design and location of signage is crucial to attract the a... [more]
In-situ signage is a cost effective environmental education tool used in marine protected area (MPA) management, and the design and location of signage is crucial to attract the attention of targeted audiences. The implementation of multiple-use MPAs increases the challenges of communicating awareness of MPA boundaries and permitted activities. Currently, little is known about how effective signage in multiple-use MPAs is in communicating information to stakeholders that will promote supportive attitudes and behaviours towards MPAs. This study evaluated the usefulness of in-situ signage in an existing multiple-use MPA, to determine if signs pertaining to the MPA captured the attention of recreational users, and provided adequate information. Structured interviews with recreational fishers, divers, and other users, were used to determine users' awareness of being in an MPA, their awareness of management objectives and associated zoning scheme, together with levels of agreement or disagreement on whether or not current in-situ signage adequately communicates information about the MPA. It was evident that the types and accessibility of in-situ signs in the MPA may not be effective at capturing the attention of intended audiences and providing relevant information, with the exception of signs located at the dive site, due to their design, size, and placement. Awareness differed among the three user groups, together with their views on the effectiveness of signage. Many recreational fishers believed existing signage was inadequate and unclear, and expressed frustrations with the complexity of zoning rules and location of their boundaries. Based on this study, recommendations about the presentation, content, and placement of signage relative to access points, and information required by MPA users, is provided.
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Nova |
2015 |
Robinson LM, Gledhill DC, Moltschaniwskyj NA, Hobday AJ, Frusher S, N Barrett, et al., 'Rapid assessment of an ocean warming hotspot reveals "high" confidence in potential species' range extensions', Global Environmental Change, 31 28-37 (2015) [C1]
Shifts in species' ranges are one of the most frequently reported and globally ubiquitous impacts of climate change, with rates of movement being particularly high in the sea... [more]
Shifts in species' ranges are one of the most frequently reported and globally ubiquitous impacts of climate change, with rates of movement being particularly high in the sea. The arrival of multiple range extending species can cause serious issues for natural resource managers; some species threaten ecosystem function while others present social and/or economic opportunities. An early indication of which species are potentially extending their ranges can provide useful guidance for managers regarding future investments in impact assessment, monitoring or potential management intervention. Given that scientific monitoring data on potential range shifting species are often sparse in the marine environment a rapid assessment that utilises and assimilates disparate data sources that vary in quality, quantity and collection methods is needed. Off the east coast of Tasmania surface waters have been warming at almost four times the global average and dozens of species range shifts have already been documented. Building on existing methods used in the early detection of invasive species, we developed a cost-effective and rapid screening assessment tool that uses monitoring data from a variety of sources, particularly from the citizen science program Redmap, to classify levels of confidence in potential range extensions over a three year time period (2009-2012) for a variety of marine species. From our assessment of 47 species, eight were classified with "high" confidence as potentially extending their ranges. The "high" confidence classification of these species suggests they should be a priority when investigating potential ecosystem and socio-economic impacts.
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Nova |
2015 |
Arkhipkin AI, Rodhouse PGK, Pierce GJ, Sauer W, Sakai M, Allcock L, et al., 'World squid fisheries', Reviews in Fisheries Science and Aquaculture, 23 92-252 (2015) [C1]
Some 290 species of squids comprise the order Teuthida that belongs to the molluscan Class Cephalopoda. Of these, about 30-40 squid species have substantial commercial importance ... [more]
Some 290 species of squids comprise the order Teuthida that belongs to the molluscan Class Cephalopoda. Of these, about 30-40 squid species have substantial commercial importance around the world. Squid fisheries make a rather small contribution to world landings from capture fisheries relative to that of fish, but the proportion has increased steadily over the last decade, with some signs of recent leveling off. The present overview describes all substantial squid fisheries around the globe. The main ecological and biological features of exploited stocks, and key aspects of fisheries management are presented for each commercial species of squid worldwide. The history and fishing methods used in squid fisheries are also described. Special attention has been paid to interactions between squid fisheries and marine ecosystems including the effects of fishing gear, the role of squid in ecosystem change induced by overfishing on groundfish, and ecosystem-based fishery management.
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Nova |
2015 |
O'Connor S, Moltschaniwskyj N, Bolch CJS, O'Connor W, 'Assessment of temperature or salinity effects on larval development by catecholamine-induced metamorphosis of hatchery-reared flat oyster, Ostrea angasi (Sowerby 1871) larvae', Aquaculture Research, 46 2501-2511 (2015) [C1]
A need to improve larval rearing techniques led to the development of protocols for catecholamine-induced settlement of flat oyster, Ostrea angasi, larvae. To further refine these... [more]
A need to improve larval rearing techniques led to the development of protocols for catecholamine-induced settlement of flat oyster, Ostrea angasi, larvae. To further refine these techniques and optimize settlement percentages, the influence of salinity or temperature on development of O. angasi larvae was assessed using epinephrine-induced metamorphosis. Larvae were reared between salinities of 15-35 and temperatures between 14.5 and 31°C. The greatest percentage survival, growth, development occurred when larvae were reared between 26 and 29°C and between salinities of 30 and 35. Larvae reared outside this salinity and temperature range exhibited reduced growth, survival and/or delayed development. Short-term (1¿h) reduction in larval rearing temperature from 26°C to 23.5°C significantly increased larval metamorphosis without affecting larval survival. Short-term (1¿h) increase in larval rearing temperature from 26°C to 29 and 31°C decreased larval survival and metamorphosis. To ensure repeatability in outcomes, tests showed that larvae sourced from different estuaries did not vary significantly in their metamorphic response to short-term temperature manipulation and epinephrine-induced metamorphosis.
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Nova |
2015 |
Ramos JE, Pecl GT, Semmens JM, Strugnell JM, León RI, Moltschaniwskyj NA, 'Reproductive capacity of a marine species (Octopus tetricus) within a recent range extension area', Marine and Freshwater Research, 66 999-1008 (2015) [C1]
To persist in the face of environmental change, species must adjust to the new conditions or change their geographical distribution, e.g. by range extension. Success for individua... [more]
To persist in the face of environmental change, species must adjust to the new conditions or change their geographical distribution, e.g. by range extension. Success for individuals within a zone of range extension requires the new environment to support their capacity to produce viable gametes and survival of the offspring. Reproductive characteristics of the polewards range-shifting Octopus tetricus were examined within the new range off north-eastern Tasmania, Australia, to assess whether it is likely to successfully establish in this extended area of its range. Approximately 44% of captured males and 14% of captured females were mature. Mature females with developing eggs were found throughout the year. Greater numbers of mature females were observed during the austral summer and spring, whereas mature males were observed all year round. Fecundity was high and developing embryos appeared to be viable. Our results suggest that O. tetricus is successfully reproducing beyond its historical range, the reproductive cycle is timed to favourable environmental conditions, and the population has the potential to be self-sustainable. The reproductive biology of O. tetricus may thus facilitate the establishment and prevalence of the population into new environments beyond the known historical distribution.
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Nova |
2015 |
Mendo T, Lyle JM, Moltschaniwskyj NA, Semmens JM, 'Early post-settlement mortality of the scallop Pecten fumatus and the role of algal mats as a refuge from predation', ICES Journal of Marine Science, 72 2322-2331 (2015) [C1]
Early post-settlement mortality is one of the main processes determining distribution and abundance patterns of marine benthic invertebrates. Most scallops have an attached phase ... [more]
Early post-settlement mortality is one of the main processes determining distribution and abundance patterns of marine benthic invertebrates. Most scallops have an attached phase as spat before they release the byssus and move onto the soft sediments. Thus, spat differ from other stages of life in their use of microhabitat, lack of mobility, and therefore in their vulnerability to mortality processes such as predation. However, the contribution of predation to explain levels of mortality experienced by spat and early juvenile scallops is unknown. Complex habitats such as seagrasses and algae provide a substrate upon which spat can attach and might confer an advantage as a refuge from predation. This study investigates the contribution of early post-settlement predation on abundance of Pecten fumatus and determines the role of the algae Hincksia sordida as a refuge from predation. Data were collected using field observations, a predator exclusion experiment, and tethering techniques. Mortality of up to 85% during the first weeks after settlement appeared to have prevented the establishment of an adult population at our study site. Mats of the macroalgae H. sordida provided a settlement substrate for P. fumatus spat. However, increased algal biomass did not provide greater protection from predation to juvenile scallops than lower algal biomass. Our study suggests that prey survival in submersed vegetation is likely to be dynamic among years, and affected by prey behaviour and density as well as the characteristics of the submerged vegetation.
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Nova |
2015 |
Green CP, Robertson SG, Hamer PA, Virtue P, Jackson GD, Moltschaniwskyj NA, 'Combining statolith element composition and fourier shape data allows discrimination of spatial and temporal stock structure of arrow squid (Nototodarus gouldi)', Canadian Journal of Fisheries and Aquatic Sciences, 72 1609-1618 (2015) [C1]
While arrow squid (Nototodarus gouldi) in Australia are currently managed as a single population, biological differences in individuals between locations of capture suggests these... [more]
While arrow squid (Nototodarus gouldi) in Australia are currently managed as a single population, biological differences in individuals between locations of capture suggests these are separate stocks requiring stock-specific harvest strategies. We used two techniques to derive information about stock structure from different parts of the life cycle, providing a novel holistic approach to exploring stock structure. This study combined two techniques, statolith shape and statolith elemental composition, to determine dispersal patterns of N. gouldi between regions and evidence of separate stocks. While adult statolith shape provided evidence that adults caught in the two locations belonged to different stocks, statolith elemental composition suggested that N. gouldi caught at each location had hatched throughout their distribution, with egg mass and juvenile drift potentially facilitated by seasonal longitudinal ocean currents. However, there was evidence of asymmetry in ontogenetic movement of N. gouldi, with adults in Victoria contributing more to the Great Australian Bight stock than vice versa and with the implication that the Victorian stock may need to be managed as the source stock.
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Nova |
2014 |
Mendo T, Lyle JM, Moltschaniwskyj NA, Tracey SR, Semmens JM, 'Habitat characteristics predicting distribution and abundance patterns of scallops in D'Entrecasteaux Channel, Tasmania', PLoS ONE, 9 (2014) [C1]
Habitat characteristics greatly influence the patterns of distribution and abundance in scallops, providing structure for the settlement of spat and influencing predation risk and... [more]
Habitat characteristics greatly influence the patterns of distribution and abundance in scallops, providing structure for the settlement of spat and influencing predation risk and rates of survival. Establishing scallop-habitat relationships is relevant to understanding the ecological processes that regulate scallop populations and to managing critical habitats. This information is particularly relevant for the D'Entrecasteaux Channel, south-eastern Tasmania (147.335 W, 43.220 S), a region that has supported significant but highly variable scallop production over many years, including protracted periods of stock collapse. Three species of scallops are present in the region; the commercial scallop Pecten fumatus, the queen scallop Equichlamys bifrons, and the doughboy scallop Mimachlamys asperrima . We used dive surveys and Generalized Additive Modelling to examine the relationship between the distribution and abundance patterns of each species and associated habitat characteristics. The aggregated distribution of each species could be predicted as a function of sediment type and species-specific habitat structural components. While P. fumatus was strongly associated with finer sediments and E. bifrons with coarse grain sediments, M. asperrima had a less selective association, possibly related to its ability to attach on a wide range of substrates. Other habitat characteristics explaining P. fumatus abundance were depth, Asterias amurensis abundance, shell and macroalgae cover. Equichlamys bifrons was strongly associated with macroalgae and seagrass cover, whereas M. asperrima abundance was greatly explained by sponge cover. The models define a set of relationships from which plausible hypotheses can be developed. We propose that these relationships are mediated by predation pressure as well as the specific behavioural characteristics of each species. The findings also highlight the specific habitat characteristics that are relevant for spatial management and habitat restoration plans. © 2014 Mendo et al.
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Nova |
2014 |
Ramos JE, Pecl GT, Moltschaniwskyj NA, Strugnell JM, León RI, Semmens JM, 'Body size, growth and life span: implications for the polewards range shift of Octopus tetricus in south-eastern Australia.', PLoS One, 9 e103480 (2014) [C1]
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Nova |
2014 |
Nishiguchi MK, Nabhitabhata J, Moltschaniwskyj NA, Boletzkv SV, 'A REVIEW OF THE PYGMY SQUID IDIOSEPIUS: PERSPECTIVES EMERGING FROM AN "INCONSPICUOUS" CEPHALOPOD', VIE ET MILIEU-LIFE AND ENVIRONMENT, 64 23-34 (2014) [C1]
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Nova |
2014 |
Robin JP, Roberts M, Zeidberg L, Bloor I, Rodriguez A, Briceño F, et al., 'Transitions during cephalopod life history: The role of habitat, environment, functional morphology and behaviour 361-437 (2014) [C1]
Cephalopod life cycles generally share a set of stages that take place in different habitats and are adapted to specific, though variable, environmental conditions. Throughout the... [more]
Cephalopod life cycles generally share a set of stages that take place in different habitats and are adapted to specific, though variable, environmental conditions. Throughout the lifespan, individuals undertake a series of brief transitions from one stage to the next. Four transitions were identified: fertilisation of eggs to their release from the female (1), from eggs to paralarvae (2), from paralarvae to subadults (3) and from subadults to adults (4). An analysis of each transition identified that the changes can be radical (i.e. involving a range of morphological, physiological and behavioural phenomena and shifts in habitats) and critical (i.e. depending on environmental conditions essential for cohort survival). This analysis underlines that transitions from eggs to paralarvae (2) and from paralarvae to subadults (3) present major risk of mortality, while changes in the other transitions can have evolutionary significance. This synthesis suggests that more accurate evaluation of the sensitivity of cephalopod populations to environmental variation could be achieved by taking into account the ontogeny of the organisms. The comparison of most described species advocates for studies linking development and ecology in this particular group. © 2014 Elsevier Ltd.
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Nova |
2014 |
Knowles G, Handlinger J, Jones B, Moltschaniwskyj N, 'Hemolymph chemistry and histopathological changes in Pacific oysters (Crassostrea gigas) in response to low salinity stress', Journal of Invertebrate Pathology, 121 78-84 (2014) [C1]
This study described seasonal differences in the histopathological and hemolymph chemistry changes in different family lines of Pacific oysters, Crassostrea gigas, in response to ... [more]
This study described seasonal differences in the histopathological and hemolymph chemistry changes in different family lines of Pacific oysters, Crassostrea gigas, in response to the stress of an abrupt change to low salinity, and mechanical grading. The most significant changes in pallial cavity salinity, hemolymph chemistry and histopathological findings occurred in summer at low salinity. In summer (water temperature 18. °C) at low salinity, 9 (25.7% of full salinity), the mean pallial cavity salinity in oysters at day 3 was 19.8. ±. 1.6 (SE) and day 10 was 22.8. ±. 1.6 (SE) lower than oysters at salinity 35. Associated with this fall in pallial cavity salinity, mean hemolymph sodium for oysters at salinity 9 on day 3 and 10 were 297.2. mmol/L. ±. 20(SE) and 350.4. mmol/L. ±. 21.3(SE) lower than oysters at salinity 35. Similarly mean hemolymph potassium in oysters held at salinity 9 at day 3 and 10 were 5.6. mmol/L. ±. 0.6(SE) and 7.9. mmol/L. ±. 0.6 (SE) lower than oysters at salinity 35. These oysters at low salinity had expanded intercellular spaces and significant intracytoplasmic vacuolation distending the cytoplasm of epithelial cells in the alimentary tract and kidney and hemocyte infiltrate (diapedesis) within the alimentary tract wall. In contrast, in winter (water temperature 8. °C) oyster mean pallial cavity salinity only fell at day 10 and this was by 6.0. ±. 0.6 (SE) compared to that of oysters at salinity 35. There were limited histopathological changes (expanded intercellular spaces and moderate intracytoplasmic vacuolation of renal epithelial cells) in these oysters at day 10 in low salinity. Mechanical grading and family line did not influence the oyster response to sudden low salinity. These findings provide additional information for interpretation of non-lethal, histopathological changes associated with temperature and salinity variation. © 2014 Elsevier Inc.
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Nova |
2014 |
Mendo T, Moltschaniwskyj N, Lyle JM, Tracey SR, Semmens JM, 'Role of density in aggregation patterns and synchronization of spawning in the hermaphroditic scallop Pecten fumatus', Marine Biology, 161 2857-2868 (2014) [C1]
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Nova |
2013 |
Moltschaniwskyj NA, Carter CG, 'The Adaptive Response of Protein Turnover to the Energetic Demands of Reproduction in a Cephalopod', PHYSIOLOGICAL AND BIOCHEMICAL ZOOLOGY, 86 119-126 (2013) [C1]
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Nova |
2012 |
Hughes TP, Baird AH, Dinsdale EA, Moltschaniwskyj NA, Pratchett MS, Tanner JE, Willis BL, 'Assembly rules of reef corals are flexible along a steep climatic gradient', Current Biology, 22 736-741 (2012) [C1]
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Nova |
2012 |
O'Connor S, Moltschaniwskyj N, Bolch CJS, O'Connor W, 'Dietary influence on growth and development of flat oyster, Ostrea angasi (Sowerby, 1871), larvae', AQUACULTURE RESEARCH, 43 1317-1327 (2012) [C1]
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2011 |
Crawford CM, Moltschaniwskyj NA, Willcox S, 'Size and characteristics of aggregations of moon jellyfish (aurelia sp.) in Tasmania, Australia', Papers and Proceedings of the Royal Society of Tasmania, 145 9-15 (2011) [C1]
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Nova |
2011 |
Fluckiger M, Brown MR, Ward LR, Moltschaniwskyj NA, 'Predicting glycogen concentration in the foot muscle of abalone using near infrared reflectance spectroscopy (NIRS)', Food Chemistry, 126 1817-1820 (2011) [C1]
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2011 |
Pecl GT, Tracey SR, Danyushevsky L, Wotherspoon S, Moltschaniwskyj NA, 'Elemental fingerprints of southern calamary (Sepioteuthis australis) reveal local recruitment sources and allow assessment of the importance of closed areas', CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES, 68 1351-1360 (2011) [C1]
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2010 |
Moltschaniwskyj NA, Carter CG, 'Protein synthesis, degradation, and retention: Mechanisms of indeterminate growth in cephalopods', Physiological and Biochemical Zoology, 83 997-1008 (2010) [C1]
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2010 |
Fearman J, Moltschaniwskyj NA, 'Warmer temperatures reduce rates of gametogenesis in temperate mussels, Mytilus galloprovincialis', Aquaculture, 305 20-25 (2010) [C1]
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2010 |
Sinn DL, Moltschaniwskyj NA, Wapstra E, Dall SR, 'Are behavioral syndromes invariant? Spatiotemporal variation in shy/bold behavior in squid', Behavioral Ecology and Sociobiology, 64 693-702 (2010) [C1]
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2010 |
Pecl GT, Doubleday ZA, Danyushevsky L, Gilbert S, Moltschaniwskyj NA, 'Transgenerational marking of cephalopods with an enriched barium isotope: A promising tool for empirically estimating post-hatching movement and population connectivity', ICES Journal of Marine Science: journal du conseil, 67 1372-1380 (2010) [C1]
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2009 |
Bozzano A, Pankhurst PM, Moltschaniwskyj NA, Villanueva R, 'Eye development in southern calamary, Sepioteuthis australis, embryos and hatchlings', Marine Biology: international journal on life in oceans and coastal waters, 156 1359-1373 (2009) [C1]
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2009 |
Bani A, Moltschaniwskyj NA, Pankhurst N, 'Reproductive strategy and spawning activity of sand flathead, Platycephalus bassensis (Platycephalidae)', Cybium: revue internationale d ichtyologie, 33 151-162 (2009) [C1]
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2009 |
Fearman JA, Bolch CJ, Moltschaniwskyj NA, 'Energy storage and reproduction in mussels, Mytilus Galloprovincialis: The influence of diet quality', The Journal of Shellfish Research, 28 305-312 (2009) [C1]
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2009 |
Carter CG, Lynch KA, Moltschaniwskyj NA, 'Protein synthesis in a solitary benthic cephalopod, the Southern dumpling squid (Euprymna tasmanica)', Comparative Biochemistry and Physiology Part A: Molecular and Integrative Physiology, 153 185-190 (2009) [C1]
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2009 |
O'Connor S, Moltschaniwskyj NA, O'Connor W, 'Use of neuroactive catecholamines to chemically induce metamorphosis of hatchery-reared flat oyster, Ostrea angasi, larvae', Aquaculture Research, 40 1567-1577 (2009) [C1]
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2008 |
Sinn DL, Gosling SD, Moltschaniwskyj NA, 'Development of shy/bold behaviour in squid: context-specific phenotypes associated with developmental plasticity', Animal Behaviour, 75 433-442 (2008) [C1]
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2008 |
Willcox S, Moltschaniwskyj NA, Crawford CM, 'Population dynamics of natural colonies of Aurelia sp. scyphistomae in Tasmania, Australia', Marine Biology: international journal on life in oceans and coastal waters, 154 661-670 (2008) [C1]
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2008 |
Kuipers MR, Pecl GT, Moltschaniwskyj NA, 'Batch or trickle: Understanding the multiple spawning strategy of southern calamary, Sepioteuthis australis (Mollusca: Cephalopoda)', Marine and Freshwater Research, 59 987-997 (2008) [C1]
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2008 |
MacLeod CK, Moltschaniwskyj NA, Crawford CM, 'Ecological and functional changes associated with long-term recovery from organic enrichment', Marine Ecology: Progress Series, 365 17-24 (2008) [C1]
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2008 |
Bani A, Moltschaniwskyj NA, 'Spatio-temporal variability in reproductive ecology of sand flathead, Platycephalus bassensis, in three Tasmanian inshore habitats: Potential implications for management', Journal of Applied Ichthyology, 24 555-561 (2008) [C1]
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2007 |
Moltschaniwskyj N, Jackson G, Pecl G, Semmens J, 'Cephalopod life cycles: Biology, management and conservation - Preface', REVIEWS IN FISH BIOLOGY AND FISHERIES, 17 77-78 (2007)
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2007 |
Moltschaniwskyj NA, Hall K, Marian JEAR, Nishiguchi M, Sakai M, Shulman DJ, et al., 'Ethical and welfare considerations when using cephalopods as experimental animals', REVIEWS IN FISH BIOLOGY AND FISHERIES, 17 455-476 (2007) [C1]
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2007 |
Lyle JM, Moltschaniwskyj NA, Morton AJ, Brown IW, Mayer D, 'Effects of hooking damage and hook type on post-release survival of sand flathead (Platycephalus bassensis)', MARINE AND FRESHWATER RESEARCH, 58 445-453 (2007) [C1]
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2007 |
Willcox S, Moltschaniwskyj NA, Crawford C, 'Asexual reproduction in scyphistomae of Aurelia sp.: Effects of temperature and salinity in an experimental study', Journal of Experimental Marine Biology and Ecology, 353 107-114 (2007) [C1]
The growth and survival of colonies and individuals within sedentary polyp colonies of moon jellyfish (Aurelia sp.) was investigated at three temperatures and three salinities in ... [more]
The growth and survival of colonies and individuals within sedentary polyp colonies of moon jellyfish (Aurelia sp.) was investigated at three temperatures and three salinities in laboratory experiments. Growth rates of colonies (number of polyps and number of buds in the colony) and individuals (number of buds per active scyphistomae) significantly increased with temperature, but were not affected by salinity. Survival was high in all treatment combinations indicating a wide tolerance to environmental conditions. However, scyphistomae at the lowest temperature had a greater percentage of larger individuals and slower population growth rate than those at warmer temperatures. These results suggest that the reproductive strategy to maximise production of Aurelia sp. is to increase the size of scyphistomae colonies by asexual budding when conditions are good (warmer temperatures and abundant food generally during spring and summer). Budding activity slows, but the size of scyphistomae increases, during the colder winter period leading up to strobilation, resulting in the production of a greater number of ephyrae. The trigger for strobilation is possibly stressful conditions. However, if trigger conditions do not occur, the colony of scyphistomae can continue to grow and survive through a broad range of conditions spanning many seasons, thus ensuring survival of the population. © 2007 Elsevier B.V. All rights reserved.
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2007 |
Hughes TP, Rodrigues MJ, Bellwood DR, Ceccarelli D, Hoegh-Guldberg O, McCook L, et al., 'Phase shifts, herbivory, and the resilience of coral reefs to climate change', CURRENT BIOLOGY, 17 360-365 (2007) [C1]
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2007 |
Macleod CK, Moltschaniwskyj NA, Crawford CM, Forbes SE, 'Biological recovery from organic enrichment: some systems cope better than others', MARINE ECOLOGY PROGRESS SERIES, 342 41-53 (2007) [C1]
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2006 |
Moltschaniwskyj N, Johnston D, 'Evidence that lipid can be digested by the dumpling squid Euprymna tasmanica, but is not stored in the digestive gland', MARINE BIOLOGY, 149 565-572 (2006) [C1]
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2006 |
Macleod CK, Moltschaniwskyj NA, Crawford CM, 'Evaluation of short-term fallowing as a strategy for the management of recurring organic enrichment under salmon cages', MARINE POLLUTION BULLETIN, 52 1458-1466 (2006) [C1]
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2006 |
Sinn DL, Apiolaza LA, Moltschaniwskyj NA, 'Heritability and fitness-related consequences of squid personality traits', JOURNAL OF EVOLUTIONARY BIOLOGY, 19 1437-1447 (2006) [C1]
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2006 |
Pecl GT, Moltschaniwskyj NA, 'Life history of a short-lived squid (Sepioteuthis australis): resource allocation as a function of size, growth, maturation, and hatching season', ICES JOURNAL OF MARINE SCIENCE, 63 995-1004 (2006) [C1]
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2005 |
Swift K, Johnston D, Moltschaniwskyj N, 'The digestive gland of the Southern Dumpling Squid (Euprymna tasmanica): Structure and function', Journal of Experimental Marine Biology and Ecology, 315 177-186 (2005) [C1]
The cephalopod digestive gland plays an important role in the efficient assimilation of nutrients and therefore the fast growth of the animal. The histological and enzymatic struc... [more]
The cephalopod digestive gland plays an important role in the efficient assimilation of nutrients and therefore the fast growth of the animal. The histological and enzymatic structure of Euprymna tasmanica was studied and used in this experiment to determine the dynamics of the gland in response to feeding. The major roles of the digestive gland were secretion of digestive enzymes in spherical inclusions (boules) and excretion of metabolic wastes in brown body vacuoles. High levels of trypsin, chymotrypsin and a-amylase, low levels of a-glucosidase and negligible carboxypeptidase activity were produced by the gland. There was no evidence of secretion of digestive enzymes in other organs of the digestive tract. Within 60 min of a feeding event, the gland produced increasing numbers of boules to replace those lost from the stomach during the feeding event. Initially, small boules were seen in the digestive cells, they increased in size until they are released into the lumen of the gland where they are transported to the stomach. There was no evidence of an increase in activity of digestive enzymes following a feeding event, despite structural changes in the gland. However, there was large variation among individuals in the level of digestive enzyme activity. A negative correlation between boule and brown body vacuole density suggested that the large variation in enzyme activity may be due to the digestive gland alternating between enzyme production and excretion. © 2004 Published by Elsevier B.V.
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2005 |
Sinn DL, Moltschaniwskyj NA, 'Personality traits in dumpling squid (Euprymna tasmanica): Context-specific traits and their correlation with biological characteristics', JOURNAL OF COMPARATIVE PSYCHOLOGY, 119 99-110 (2005) [C1]
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2005 |
Johnston D, Moltschaniwskyj N, Wells J, 'Development of the radula and digestive system of juvenile blacklip abalone (Haliotis rubra) Potential factors responsible for variable weaning success on artificial diets', AQUACULTURE, 250 341-355 (2005) [C1]
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2004 |
Steer MA, Moltschaniwskyj NA, Nichols DS, Miller M, 'The role of temperature and maternal ration in embryo survival: Using the dumpling squid Euprymna tasmanica as a model', Journal of Experimental Marine Biology and Ecology, 307 73-89 (2004)
Using a 'model' sepiolid, Euprymna tasmanica, this study investigated the role of maternal nutritional and thermal history on egg quality and subsequent embryo survival.... [more]
Using a 'model' sepiolid, Euprymna tasmanica, this study investigated the role of maternal nutritional and thermal history on egg quality and subsequent embryo survival. E. tasmanica is a multiple spawner, therefore it was possible to track egg quality and hatching success over successive spawning episodes. A two-factor orthogonal experimental design, involving two feeding levels (high and low rations) and two temperatures (summer and winter), was implemented with half of the replicates used to explore embryonic development and the remaining half examining egg-yolk quality via fatty acid analysis. Differences in reproductive output and embryo mortality were largely attributed to maternal ration and not temperature. Females maintained on low ration produced smaller clutches, consisting of smaller eggs and exhibiting higher embryo mortality rates than high ration females. Both batch fecundity and relative hatching success declined over successive clutches. Lipid content was also significantly lower in low ration females, however, the relative quality in terms of lipid and fatty acid constituents was maintained regardless of treatment and spawning frequency. It is suggested that elevated embryo mortality rate in eggs spawned by low-fed females was a function of insufficient maternally derived yolk resources to fuel embryogenesis. Results indicate that maternal nutritional and reproductive history are important determinates for offspring survival, potentially having significant effects on the magnitude of subsequent recruitment events in squid populations. © 2004 Elsevier B.V. All rights reserved.
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2004 |
Pecl GT, Moltschaniwskyj NA, Tracey SR, Jordan AR, 'Erratum: Inter-annual plasticity of squid life history and population structure: Ecological and management implications (Oecologia (2004) 139 (515-524))', Oecologia, 140 380 (2004)
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2004 |
Macleod CK, Crawford CM, Moltschaniwskyj NA, 'Assessment of long term change in sediment condition after organic enrichment: defining recovery', MARINE POLLUTION BULLETIN, 49 79-88 (2004)
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2004 |
Pecl GT, Moltschaniwskyj NA, Tracey SR, Jordan AR, 'Inter-annual plasticity of squid life history and population structure: ecological and management implications', OECOLOGIA, 139 515-524 (2004)
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2004 |
Pecl GT, Moltschaniwskyj NA, Tracey SR, Jordan AR, 'Inter-annual plasticity of squid life history and population structure: ecological and management implications (vol 139, pg 515, 2004)', OECOLOGIA, 140 380-380 (2004)
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2004 |
Moltschaniwskyj NA, Steer MA, 'Spatial and seasonal variation in reproductive characteristics and spawning of southern calamary (Sepioteuthis australis): spreading the mortality risk', ICES JOURNAL OF MARINE SCIENCE, 61 921-927 (2004)
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2003 |
Moltschaniwskyj NA, Pecl GT, 'Small-scale spatial and temporal patterns of egg production by the temperate loliginid squid Sepioteuthis australis', MARINE BIOLOGY, 142 509-516 (2003)
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2003 |
Steer MA, Pecl GT, Moltschaniwskyj NA, 'Are bigger calamary Sepioteuthis australis hatchlings more likely to survive? A study based on statolith dimensions', MARINE ECOLOGY PROGRESS SERIES, 261 175-182 (2003)
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2003 |
Suplicy FM, Schmitt JF, Moltschaniwskyj NA, Ferreira JF, 'Modeling of filter-feeding behavior in the brown mussel, Perna perna (l.), exposed to natural variations of seston availability in Santa Catarina, Brazil', JOURNAL OF SHELLFISH RESEARCH, 22 125-134 (2003)
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2003 |
Steer MA, Moltschaniwskyj NA, Jordan AR, 'Embryonic development of southern calamary (Sepioteuthis australis) within the constraints of an aggregated egg mass', MARINE AND FRESHWATER RESEARCH, 54 217-226 (2003)
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2002 |
Hughes TP, Baird AH, Dinsdale EA, Harriott VJ, Moltschaniwskyj NA, Pratchett MS, et al., 'Detecting regional variation using meta-analysis and large-scale sampling: Latitudinal patterns in recruitment', ECOLOGY, 83 436-451 (2002)
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2002 |
Jackson GD, Moltschaniwskyj NA, 'Spatial and temporal variation in growth rates and maturity in the Indo-Pacific squid Sepioteuthis lessoniana (Cephalopoda : Loliginidae)', MARINE BIOLOGY, 140 747-754 (2002)
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2002 |
Gowland FC, Moltschaniwskyj NA, Steer MA, 'Description and quantification of developmental abnormalities in a natural Sepioteuthis australis spawning population (Mollusca: Cephalopoda)', Marine Ecology Progress Series, 243 133-141 (2002)
Eggs of the southern calamary Sepioteuthis australis were sampled from spawning sites off eastern Tasmania, Australia, during an austral spring/summer spawning season. At fortnigh... [more]
Eggs of the southern calamary Sepioteuthis australis were sampled from spawning sites off eastern Tasmania, Australia, during an austral spring/summer spawning season. At fortnightly intervals, 3 unfouled and 3 biofouled egg strands were sampled from 6 to 23 distinct egg masses (Neggs = 2649). Highly significant variation was noted between sample dates in the frequency of unfertilised eggs, developmental abnormalities and egg mortalities. Unfertilised eggs were only found during late October and early November and represented a mean 2.12 ± 1.25% SE and 0.58 ± 0.58% SE eggs per strand respectively. Frequency of abnormality varied significantly between sample dates and ranged from 8.35 ± 1.86% SE eggs per strand in late November to 0.92 ± 0.41% SE in late December. Abnormalities were arbitrarily categorised as defects in external yolk sac morphology, reduced embryonic size, mantle deformities, eye deformities and arm deformities. Defects in external yolk sac morphology were found throughout the spawning season and accounted for 46.3% of all abnormalities. Incidence of mortality varied significantly between sample dates and ranged from 1.40 ± 0.68% SE per strand in late October to 11.61 ± 3.23% SE in early January. Highly significant correlation was noted between incidence of developmental abnormality and within-strand egg position. Biofouled egg strands were characterised by comparatively low incidences of unfertilised and dead eggs. The influences of environment, egg position and biofouling upon embryonic development in S. australis are discussed.
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2002 |
Steer MA, Moltschaniwskyj NA, Gowland FC, 'Temporal variability in embryonic development and mortality in the southern calamary Sepioteuthis australis: A field assessment', Marine Ecology Progress Series, 243 143-150 (2002)
This study describes the incidence of embryonic mortality and differential development in southern calamary Sepioteuthis australis eggs. Late-stage S. australis egg strands harbou... [more]
This study describes the incidence of embryonic mortality and differential development in southern calamary Sepioteuthis australis eggs. Late-stage S. australis egg strands harbouring multiple embryos close to hatching were sampled from shallow (<4 m) Tasmanian spawning grounds from early November 2000 to January 2001. Sepioteuthis australis embryos were found to develop asynchronously within individual egg strands with proximal embryos developing slower and suffering higher mortality than their distal siblings. The magnitude of asynchrony, however, differed throughout the season with greater within-strand differences observed when embryos were exposed to broader incubation temperatures. Unexpectedly, embryos developed more synchronously within biologically fouled strands and displayed a significantly lower incidence of mortality compared to those developing in unfouled strands. Embryonic mortality was initially low (4%) and significantly increased to 20% in late November, remaining above 10% until late December. This dramatic increase in mortality was not strongly associated with increasing water temperatures, but coincided with a period of heavy rainfall alluding to potential salinity effects.
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2001 |
Jackson GD, Moltschaniwskyj NA, 'The influence of ration level on growth and statolith increment width of the tropical squid Sepioteuthis lessoniana (Cephalopoda : Loliginidae): an experimental approach', MARINE BIOLOGY, 138 819-825 (2001)
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2001 |
Jackson GD, Moltschaniwskyj NA, 'Temporal variation in growth rates and reproductive parameters in the small near-shore tropical squid Loliolus noctiluca; is cooler better?', MARINE ECOLOGY PROGRESS SERIES, 218 167-177 (2001)
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2000 |
Martinez P, Bettencourt V, Guerra A, Moltschaniwskyj NA, 'How temperature influences muscle and cuttlebone growth in juvenile cuttlefish (Sepia elliptica) (Mollusca : Cephalopoda) under conditions of food stress', CANADIAN JOURNAL OF ZOOLOGY, 78 1855-1861 (2000)
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2000 |
Hughes TP, Baird AH, Dinsdale EA, Moltschaniwskyj NA, Pratchett MS, Tanner JE, Willis BL, 'Supply-side ecology works both ways: The link between benthic adults, fecundity, and larval recruits', ECOLOGY, 81 2241-2249 (2000)
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2000 |
Moltschaniwskyj NA, Jackson GD, 'Growth and tissue composition as a function of feeding history in juvenile cephalopods', JOURNAL OF EXPERIMENTAL MARINE BIOLOGY AND ECOLOGY, 253 229-241 (2000)
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2000 |
Semmens JM, Moltschaniwskyj NA, 'An examination of variable growth in the loliginid squid Sepioteuthis lessoniana: a whole animal and reductionist approach', MARINE ECOLOGY PROGRESS SERIES, 193 135-141 (2000)
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2000 |
Moltschaniwskyj NA, Semmens JM, 'Limited use of stored energy reserves for reproduction by the tropical loliginid squid Photololigo sp.', JOURNAL OF ZOOLOGY, 251 307-313 (2000)
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2000 |
Moltschaniwskyj NA, Semmens JM, 'Limited use of stored energy reserves for reproduction by the tropical loliginid squid Photololigo sp.', Journal of Zoology, 251 307-313 (2000)
This study sought to determine if the tropical loliginid squid Photololigo sp. stores energy in the form of lipid, carbohydrate or protein for reproductive investment. Individuals... [more]
This study sought to determine if the tropical loliginid squid Photololigo sp. stores energy in the form of lipid, carbohydrate or protein for reproductive investment. Individuals were examined for changes in morphometry, mantle muscle structure and concentrations of water, lipid, carbohydrate and protein in muscle tissue and the digestive gland, associated with the stage of reproductive maturation. Muscle mass was affected by reproductive maturation in females. Mature individuals were lighter for their length compared with females in the early stages of maturation. Concentrations of lipid and carbohydrate in the muscle tissue were very low, and female Photololigo sp. showed equivocal evidence of declining lipid and carbohydrate levels with egg production. There was no evidence of dramatic changes in protein concentration in the mantle muscle with reproductive maturation. Male Photololigo sp. showed a change in the digestive gland with maturation, with water content increasing and protein concentrations decreasing. The digestive gland of both male and female Photololigo sp. increased in size and contained less water with growth. There was little evidence that the storage and transfer of energy for reproduction occurred in Photololigo sp. Instead, it is probable that energy for reproduction is predominantly sourced directly from consumed food.
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1999 |
Martinez P, Moltschaniwskyj NA, 'Description of growth in the tropical cuttlefish Sepia elliptica using muscle tissue', JOURNAL OF THE MARINE BIOLOGICAL ASSOCIATION OF THE UNITED KINGDOM, 79 317-321 (1999)
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1999 |
Martinez P, Moltschaniwskyj NA, 'Description of growth in the tropical cuttlefish Sepia elliptica using muscle tissue (vol 79, pg 317, 1999)', JOURNAL OF THE MARINE BIOLOGICAL ASSOCIATION OF THE UNITED KINGDOM, 79 1156-1156 (1999) |
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1999 |
Hughes TP, Baird AH, Dinsdale EA, Moltschaniwskyj NA, Pratchett MS, Tanner JE, Willis BL, 'Patterns of recruitment and abundance of corals along the Great Barrier Reef', NATURE, 397 59-63 (1999)
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1999 |
Thomas R, Moltschaniwskyj NA, 'Ontogenetic changes in sire and shape of statoliths: implications for age and growth of the short-lived tropical squid Sepioteuthis lessoniana (Cephalopoda : Loliginidae)', FISHERY BULLETIN, 97 636-645 (1999)
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1999 |
Pecl GT, Moltschaniwskyj NA, 'Somatic growth processes: how are they altered in captivity?', PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES, 266 1133-1139 (1999)
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1999 |
Jackson GD, Moltschaniwskyj NA, 'Analysis of precision in statolith derived age estimates of the tropical squid Photololigo (Cephalopoda : Loliginidae)', ICES JOURNAL OF MARINE SCIENCE, 56 221-227 (1999)
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1998 |
Moltschaniwskyj NA, Martinez P, 'Effect of temperature and food levels on the growth and condition of juvenile Sepia elliptica (Hoyle 1885): an experimental approach', JOURNAL OF EXPERIMENTAL MARINE BIOLOGY AND ECOLOGY, 229 289-302 (1998)
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1997 |
Moltschaniwskyj N, 'Changes in mantle muscle structure associated with growth and reproduction in the tropical squid Photololigo sp. (Cephalopoda: Loliginidae)', JOURNAL OF MOLLUSCAN STUDIES, 63 290-293 (1997)
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1997 |
Pecl GT, Moltschaniwskyj NA, 'Changes in muscle structure associated with somatic growth in Idiosepius pygmaeus, a small tropical cephalopod', JOURNAL OF ZOOLOGY, 242 751-764 (1997)
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1995 |
MOLTSCHANIWSKYJ NA, DOHERTY PJ, 'CROSS-SHELF DISTRIBUTION PATTERNS OF TROPICAL JUVENILE CEPHALOPODS SAMPLED WITH LIGHT-TRAPS', MARINE AND FRESHWATER RESEARCH, 46 707-714 (1995)
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1995 |
Semmens JM, Moltschaniwskyj NA, Alexander CG, 'Effect of Feeding on the Structure of the Digestive Gland of the Tropical Sepioid
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1995 |
MOLTSCHANIWSKYJ NA, 'CHANGES IN SHAPE ASSOCIATED WITH GROWTH IN THE LOLIGINID SQUID PHOTOLOLIGO SP - A MORPHOMETRIC APPROACH', CANADIAN JOURNAL OF ZOOLOGY-REVUE CANADIENNE DE ZOOLOGIE, 73 1335-1343 (1995)
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1995 |
SEMMENS JM, MOLTSCHANIWSKYJ NA, ALEXANDER CG, 'EFFECT OF FEEDING ON THE STRUCTURE OF THE DIGESTIVE GLAND OF THE TROPICAL SEPIOID IDIOSEPIUS-PYGMAEUS', JOURNAL OF THE MARINE BIOLOGICAL ASSOCIATION OF THE UNITED KINGDOM, 75 885-897 (1995)
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1995 |
MOLTSCHANIWSKYJ NA, 'MULTIPLE SPAWNING IN THE TROPICAL SQUID PHOTOLOLIGO SP - WHAT IS THE CAST IN SOMATIC GROWTH', MARINE BIOLOGY, 124 127-135 (1995)
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1994 |
MOLTSCHANIWSKYJ NA, DOHERTY PJ, 'DISTRIBUTION AND ABUNDANCE OF 2 JUVENILE TROPICAL PHOTOLOLIGO SPECIES (CEPHALOPODA, LOLIGINIDAE) IN THE CENTRAL GREAT-BARRIER-REEF LAGOON', FISHERY BULLETIN, 92 302-312 (1994)
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1994 |
MOLTSCHANIWSKYJ NA, 'MUSCLE-TISSUE GROWTH AND MUSCLE-FIBER DYNAMICS IN THE TROPICAL LOLIGINID SQUID PHOTOLOLIGO SP (CEPHALOPODA, LOLIGINIDAE)', CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES, 51 830-835 (1994)
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1992 |
LOU DC, MOLTSCHANIWSKYJ NA, 'DAILY OTOLITH INCREMENTS IN JUVENILE TROPICAL PARROTFISHES AND SURGEONFISHES', AUSTRALIAN JOURNAL OF MARINE AND FRESHWATER RESEARCH, 43 973-981 (1992)
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