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The project will review and synthesise available global data on the potential effects and implications that plastic is causing in seafood species in the context of the impacts they generate to fishing and aquaculture sectors. Concurrently, using published literature on sources of marine pollution, the abundance of plastic entering aquatic systems from seafood related sources will be quantified, with particular focus to the Australian context. Ultimately, this will give the fisheries sector, particularly in an Australian setting, the knowledge to evaluate where appropriate mitigation strategies are necessary and reduce the presence and impacts of microplastics in seafood.

This project aligns with FRDC R&D Plan Outcome 1: Growth and Enduring prosperity; In particular, it targets the priorities of:
- Improving the understanding of the cause and extent of impacts to aquatic systems and what is needed to improve them
- Promote a circular economy to remove waste from the processing system, keep products and materials in use and promote the repair of natural systems

Providing information on how marine pollution may affect the seafood industry and seafood species fished will guide the urgency of future research and allow management and mitigation strategies that support the seafood sector to be developed. Ultimately, quantifying the amount of plastic contributed by the seafood sector to marine plastics will allow us to advance with solutions and uncover where plastic alternatives are most needed.

Objectives

1. Undertake a systematic review, collating, synthesising and analysing global data on the effects and implications of plastic pollution in seafood species and the seafood industry

2. Identify potential sources of plastic in marine environments, including the percentage coming through fishing and aquaculture

3. Highlight key knowledge gaps, opportunities and threats of plastic in the seafood sector

4. Disseminate findings and information on effects and implications of plastic pollution on seafood species to fishers and managers

Final report

Authors: Nina Wootton Patrick Reis-Santos and Bronwyn M Gillanders

Final Report • 2023-09-27 • 3.65 MB

2021-117-DLD.pdf

Summary

Microplastics are commonly consumed by seafood species however, there is still limited understanding of the effects and implications that microplastics may have on the fishing and aquaculture industry. This project summarises research on the effects that microplastic may be having on seafood species and the contribution that the seafood industry is having to marine plastic pollution. Global literature on microplastic effects in seafood species revealed 1) that 93% of all species were negatively affected by plastics, although many studies used increased levels of microplastic contamination that are not environmentally relevant (i.e., generally do not reflect environmental conditions); and 2) 23% of plastic pollution in the marine and coastal environment originates from fishing and aquaculture sources. This
report provides clear-sighted recommendations on the threats and opportunities that plastics hold for the seafood sector, as well as avenues for potential mitigation and reduction.

PROJECT NUMBER • 2022-075

PROJECT STATUS:

COMPLETED

National Workshop to develop a regional collaborative plan to control the invasive Longspined Sea Urchin (Centrostephanus rodgersii)

The 2023 National Centrostephanus Workshop was convened by the Department of Natural Resources and Environment Tasmania. The workshop brought together 130 representatives from industry, government, research, Aboriginal communities, recreational fishing groups, and the community to: • Identify...

ORGANISATION:

Department of Natural Resources and Environment Tasmania (NRE TAS)

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Identifying population connectivity of shark bycatch species in NT waters

Project number: 2020-036

Project Status:

Completed

Budget expenditure: $66,430.00

Principal Investigator: Sam Banks

Organisation: Charles Darwin University (CDU)

Project start/end date: 3 Dec 2020 - 9 Dec 2021

Contact:

FRDC

TAGS

Need

This project is needed for three main reasons:

1. It directly addresses a NT RAC priority in the 2019 call for funding applications relating to improving sustainable yield estimates to inform stock assessment programs for undefined target species and protected species in the Offshore Net and Line Fishery. The project will support sustainable fishing practices for important commercial fisheries in the NT and the development of new commercial opportunities within these fisheries: The impacts of fishery activities on these species, either through bycatch or targeted harvest, are difficult to assess in the absence of information on population connectivity and stock structure.

2. The project will develop capacity for fisheries research and monitoring in NT waters. Genetics methods are widely applied to fisheries research and monitoring and training of an early career fisheries scientist in the application and interpretation of genetic data will be a key outcome of this project.

3. The project will provide key information to support the transition of these species from bycatch to a harvested byproduct species, including an evaluation of leading-edge genetic techniques in fisheries assessment and monitoring.

Objectives

1. To develop population connectivity model for Whitecheek and Milk Shark

2. To develop capacity for research and monitoring of shark species within the Northern Territory

3. To evaluate the utility of genetic techniques in fisheries monitoring

Final report

ISBN: 978-1-922684-78-3 (Print), 978-1-922684-79-0 (Web)

Authors: Sam Banks Amy Kirke Fernanda Alves Grant Johnson and David Crook

Final Report • 2024-10-01 • 1.08 MB

2020-036-DLD.pdf

Summary

Charles Darwin University and the Northern Territory (NT) Department of Industry, Tourism and Trade (DITT) Fisheries Division used genetic data to investigate the population structure of two small tropical shark species (Milk Shark [Rhizoprionodon acutus] and Australian Blackspot Shark [Carcharhinus coatesi]), which are caught as bycatch from commercial fisheries in the NT.

The aim of this study was to gain information on the genetic stock structure to inform the future management of these two species in the NT. This project was conducted in parallel with a PhD project investigating the biology and ecology of both species for applications to fisheries management. There is motivation by the NT Government to develop these two shark species into a commercial product. This project used genetic analysis to understand the patterns of connectivity of populations of these two shark species in NT waters and adjacent regions, including northern Western Australia and Papua New Guinea.

These two shark species that are captured as bycatch in the NT Demersal Fishery have the potential to be developed into a byproduct to add value to that fishery. A sustainable commercial harvest of these two species could greatly reduce the waste from fisheries, where they are currently abundant and caught in relatively large numbers. We address current knowledge gaps in biological information about populations of R. acutus and C. coatesi to inform the potential development of a byproduct fishery for these two species in the NT.

Genetic data from R. acutus and C. coatesi strongly suggest that each species exists as a single, highly connected population in the NT. Genetic differentiation among the sampling locations for each species was low, and genetic clustering analyses provided strong support for a single population of each species in the region. Sharks of both species captured within a single location (within 50 km of one another) were more genetically related than those further apart; however, this does not constitute evidence for multiple, spatially discrete populations of either species in NT waters. Preliminary applications of effective population size estimators were used, but further work is needed to determine if these can be used to indicate trends in abundance.

The immediate implications of our research are for fisheries scientists and managers. Our results indicate that these two shark species can be monitored and managed in the NT under the assumption that each species occurs as a single population in this region. Parasite and vertebral chemistry data collected as part of a PhD project conducted in parallel with this project suggest that, for C. coatesi, individuals may be resident within certain regions (eastern versus western NT waters) but the genetic data collected here suggest that, on a generational timescale, both species occur as highly-connected populations across in the NT region.

Our research has potential implications for commercial fishers, particularly from the NT Demersal Fishery. The information from our research will flow through to the industry by contributing to the information required to develop a byproduct fishery for the two species, by utilising bycatch and increasing economic return.

PROJECT NUMBER • 2017-199

PROJECT STATUS:

COMPLETED

A preliminary assessment of the prevalence of marine micro plastics in Australian fish, crustaceans and molluscs

ORGANISATION:

University of Adelaide

TAGS

SPECIES

PROJECT NUMBER • 2015-024

PROJECT STATUS:

CURRENT

Managing ecosystem interactions across differing environments: building flexibility and risk assurance into environmental management strategies

Summary The overarching aim of this research was to provide an improved understanding of the environmental interactions of Atlantic Salmon farming and to provide recommendations to both government and industry on monitoring and management strategies that are appropriate to the level of risk...

ORGANISATION:

University of Tasmania (UTAS)

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SPECIES