Flesh colour in Atlantic salmon is considered a fundamental, if not the most important, quality parameter, and affects acceptance and price of the product. The dietary pigments responsible for flesh colour (i.e. astaxanthin and canthaxanthin) are expensive and represent 6-8% of the total production cost. Therefore, reduced flesh colour in the stock results in considerable economic losses. Several factors have been shown to impact flesh colour (e.g. environment, diet formulation, size, genetics) highlighting the complexity underlying the variation. As variable/reduced flesh colour was identified in a portion of the Petuna stock following periods of high summer temperatures, the project focused on the possible genetic effect on the trait. Furthermore, due to a general lack of knowledge of the molecular mechanisms responsible for flesh colour and its metabolism in general, which involves multiple organs and tissues, and given the opportunity to compare good and affected individuals, such investigations were also undertaken. In light of climate change and increasing seawater temperature, understanding the genetic component of the differential response manifested as variable/reduce flesh colour following thermal stress, would pave the way for improving genetic selection and producing fish with increased thermal tolerance. Finally, detection and understanding of the variation affecting flesh colour in Atlantic salmon are fundamental in order to improve marketability of the product.
This report describes critical findings and new knowledge on flesh colour variation, from both a genetic and a molecular perspective, in Atlantic salmon in Tasmania. The investigation on flesh colour variation, due to its strong correlation with high seawater temperature, led to new important insights into thermal tolerance in Atlantic salmon and their performance in a context of climate change and global warming.
The project was carried out between June 2016 and June 2020 and was the result of a collaboration between the University of the Sunshine Coast (USC) and Petuna Aquaculture (Petuna), initiated by Dr Mark Porter and Prof Abigail Elizur. The principal investigator of the project was Prof. Abigail Elizur (USC) and she was supported by two co-investigator, Dr. Tomer Ventura (USC) and Dr. Gianluca Amoroso (Petuna). Two additional co-investigators from USC, Dr. Chan D.H. Nguyen and Ms Thu T.M. Vo, were included at a later stage in order to carry out part of the research required for the project completion and formed part of their PhD projects. The investigation of the fish took place in northern Tasmania where Petuna owns both freshwater and marine sites and all the laboratory work was undertaken at both USC Genecology Research Centre and at Xelect, a genetic services provider based in Scotland (UK).
This project was originally designed to study an issue which is impacting commercial production in Petuna. Flesh colour variation post-summer (at times extending to harvest), had been identified during 2015-16 by Petuna to affect commercial value. As this issue is not impacting Petuna only, this project was expected to generate important knowledge on the factors which contribute to reduced flesh colour in Atlantic salmon stocks and result in significant ‘spill-over’ of information that will assist the wider Tasmanian salmon industry.
Traditional inhabitants from Torres Strait partly or fully own fisheries in the region. In addition to owning or
working in fisheries businesses, some individuals are occasionally involved in research and play a key role in sustainably managing living resources in the region, with several i serving as members on Resource Management Groups (RAGs), Working Groups or in reviewing scientific research proposals as part of the TSSAC. It is therefore important to ensure industry members are up to date with recent developments updated information about fisheries from around the world and are prepared to participate and present their work in these international fora.
This proposal seeks to build capacity in the Torres Strait Fisheries Industry through the active engagement of industry members and CSIRO scientists transferring and sharing knowledge to collaboratively prepare and deliver scientific talks for three major international fisheries-related conferences:
• Marine Socio-Ecological Systems Conference (Japan),
• World Fisheries Congress (Adelaide),
• 12th International Conference and Workshop on Lobster Biology & Management (Fremantle)).
This opportunity will also deepen understanding of scientific approaches and exposure to the latest scientific and technological advances and build capacity of Torres Strait Industry Representatives through co-authoring talks with CSIRO researchers and attending international fisheries conferences to facilitate knowledge exchange and networking.
In the face of mounting pressure on Australia’s marine and freshwater ecosystems, there is a continuing need for robust scientific information to support the sustainable development and management of our aquatic resources. The ASFB is Australasia’s premier professional association for fish and fisheries researchers. The annual science conference makes an important and tangible contribution to skill development of people involved in fish and fisheries research and management, particularly offering students and early career researchers opportunities to present their work, interact with peers and develop collaborative links. The ASFB has a strong commitment to promoting and communicating science, encouraging sustainable management practices, encouraging excellence in fisheries research, and recognizing outstanding contributions of scientists and professionals through various awards and scholarships. Additionally, the ASFB has recognised the need for increased international engagement via increased active involvement with in particular World Council of Fisheries Societies and with the American Fisheries Society.
This proposal is seeking sponsorship support for the annual science conference in 2020 (virtual conference due to COVID-19 restrictions), 2021 (WFS congress, Adelaide), 2022 (Joint congress with Indo-Pacific Conference, Auckland) and a series of conference associated awards that support student travel and recognise research excellence. The proposal addresses three people development program goals, namely (i) to encourage knowledge transfer and R&D adoption (ASFB annual science conference) and (ii) to recognise and promote achievements (ASFB awards) and (iii) to enhance industry leadership (bringing together a range of people for the annual conference). These activities will encourage participation and exchange of information and provide an opportunity to develop networks and collaborations with outside organisations. In addition, we also seek support to hold an event at the WFC in Adelaide to celebrate the Society’s 50th year and promote the achievements of Australia and New Zealand’s fish and fisheries science over the last 50 years.
The seafood industry is facing unprecedented challenges (WAFIC 2020 Strategy, FRDC R&D 2015). The networks established by CESSH have laid a strong foundation to attract national and international investment partners. For the first time, the whole industry along the supply chain and post harvest is working together to achieve outcomes that benefit the WA (and national seafood industry) and the health of the Australian population. It is essential that the industry is able to remain viable and indeed grow, within the constraints of an ever changing economic, technological and food security landscape. There is a need for a continued go-to place that the industry can access to gain support to develop new products, investigate novel and improved means of harvest, reduce production costs and provide evidence of the value of consuming seafood. CESSH needs to build on existing strong capacity areas and establish expertise in areas that are currently not available in WA to service the growing and diverse needs of industry. This could afford industry a point of difference in the provision of world class support to answer research and science questions that impact on growth, quality or profitability in a timely fashion, an essential service for a primary industry.