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Industry

Australian salmon (Arripis trutta): Population structure, reproduction, diet and composition of commercial and recreational catches in NSW

Project number: 2006-018
Project Status:
Completed
Budget expenditure: $629,386.00
Principal Investigator: John Stewart
Organisation: Department of Primary Industries and Regional Development (NSW)
Project start/end date: 29 Sep 2006 - 30 Sep 2009
Contact:
FRDC

Need

The eastern Australian salmon stock appears to have increased substantially in recent times and is believed to be under-utilized. Despite this, management of this species in NSW has been contentious, and is restricted by a lack of knowledge on biology and population dynamics. Specifically, managers require information that will assist their decision making concerning: (i) the status of the stock; (ii) potential expansion of the commercial fishery; (iii) impacts of resource allocation, and; (iv) ecosystem effects of salmon population expansion.

There is a lack of information on the sizes and ages of salmon being harvested and little knowledge of their biology. Research on age and growth in the 1970’s was based on scales, which have since been shown to be inaccurate (Egglestone 1975). Studies on reproduction have been limited to the timing of spawning in the southern regions. Results from this project will provide the necessary information on the composition of landings, age, growth, reproduction, movements and diet to enable informed management of the salmon resource. This project aims to address issues directly related to NSW management, however the baseline information will be valuable for management across the range of the stock.

The project outcomes of improved knowledge and management of salmon will directly address the FRDC R&D program “Natural Resources Sustainability” and the strategic challenge to “Improve the sustainability of natural resources supporting wild-catch and aquaculture”. At the state level, this project will satisfy three priority areas of research listed under the key document “Planning strategic research, aquaculture and aquatic conservation in New South Wales, 2004-2009.” These are: (i) to examine the predatory impacts of Australian salmon on other commercially important fish species; (ii) information on age and growth of recreationally important species, and; (iii) development of stock assessments for target species in the ocean hauling fishery.

Objectives

1. Determine whether eastern Australian salmon comprise a single stock along SE Australia
2. Describe the catch composition of eastern Australian salmon taken by commercial and recreational fishers in NSW, including spatial patterns in sizes and ages
3. Describe the reproductive biology of eastern Australian salmon in NSW, including their size/age at maturity and where and when they spawn
4. Model growth (using otolith derived estimates of size-at-age) of eastern Australian Salmon
5. Develop yield per recruit and spawner-biomass per recruit models at present levels of fishing mortality
6. Analyse existing tagging data for patterns of movement and potential stock delineation
7. Describe diet and potential localised impacts on prey items
8. Describe the totemic and cultural significance of Australian salmon to the Aboriginal people of NSW
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PROJECT NUMBER • 2010-735
PROJECT STATUS:
COMPLETED

SCRC: SCRC RTG : 8th Annual Workshop on Physiology and Aquaculture of Pelagics with Emphasis on Reproduction and Early Developmental Stages of Yellowfin Tuna, Achotines Laboratory, Panama (Pollyamna Hilder)

Southern Bluefin Tuna (SBT) is a major contributor to the Australian aquaculture industry, however at the moment it is reliant on the on-growing of wild-caught juveniles to market size. The recent captive-spawning of SBT by Clean Seas Tuna Ltd. (CST) has opened up the potential for the aquaculture...
ORGANISATION:
NSW Department Of Primary Industries Port Stephens
Environment
PROJECT NUMBER • 1985-083
PROJECT STATUS:
COMPLETED

Investigation of the commercial scallop (Pecten fumata) in Bass Strait

In 1985, CSIRO applied for funding from the Fishing Industry Research Trust Account to undertake a research program to investigate the commercial scallop (Pecten fumatus) in Bass Strait with the aim of providing resource assessments to guide and assist in the management of the scallop fishery. It...
ORGANISATION:
CSIRO Oceans and Atmosphere Cleveland
Environment
PROJECT NUMBER • 1985-082
PROJECT STATUS:
COMPLETED

The fisheries biology of scampi (Metanephrops spp)

Scampi, or species of clawed lobsters of the genus Metanephrops, occur on the continental slopes of many countries in the world, however, prior to 1985 were commercially fished only in deep water off south east Africa, Metanephrops andamanicus and experimentally in the western Atlantic Ocean and...
ORGANISATION:
CSIRO Oceans and Atmosphere Cleveland
Industry
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