3 results
Environment
PROJECT NUMBER • 1993-238
PROJECT STATUS:
COMPLETED

Evaluation of harvesting strategies for Australian fisheries at different levels of risk from economic collapse

Management of a marine renewable resource involves selecting a trade-off between conflicting objectives related to conservation and utilization. This problem is complicated by uncertainty about the current status and productivity of the resource being managed, and hence about the implications of...
ORGANISATION:
CSIRO Oceans and Atmosphere Cleveland
Environment
PROJECT NUMBER • 1983-049
PROJECT STATUS:
COMPLETED

Northern pelagic fish stock research

In 1982, CSIRO applied to the Fishing Industry Research Trust Account for funding of a joint biological investigation of northern Australian pelagic fish stocks. At that time these stocks supported a Taiwanese surface gill-net fishery based on sharks, tunas and Spanish mackerel. During the 1970's...
ORGANISATION:
CSIRO Oceans and Atmosphere Cleveland

Stock identity of northern fish species

Project number: 1983-048
Project Status:
Completed
Budget expenditure: $0.00
Organisation: CSIRO Oceans and Atmosphere Cleveland
Project start/end date: 28 Dec 1986 - 31 Dec 1986
:

Objectives

1. Define unit stocks for fisheries management of northern populations of Spanish mackerel, barramundi and blacktip shark.
2. Use electrophoretic analysis of protein variation to characterise each sp, examine for stock heterogeneity, define geographical boundaries

Final report

Final Report • 1984-12-31 • 4.56 MB
1983-048-DLD.pdf

Summary

The research program supported by this grant was directed at determining the number and distribution of subpopulations or genetic stocks which contribute to Australian fisheries for barramundi, northern sharks, and narrow-barred Spanish mackerel. Starch gel electrophoresis was used to reveal patterns of genetic variation in each species.

The analysis of approximately 4,500 barramundi collected at locations from the Ord River in Western Australia to the Rockhampton area of Queensland revealed the existence of at least 14 genetically discrete stocks. The significant amount of genetic subdivision characterizing Australian barramundi indicates that fisheries regulations and management policies must be focused on individual barramundi stocks in order to be maximally effective. The number and location of reserves, possible stocking of hatchery reared fish, and selective breeding of captive barramundi should all be based upon maintaining and exploiting the naturally occurring genetic heterogeneity of barramundi populations indicated by this study.

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