Project number: 2002-001
Project Status:
Completed
Budget expenditure: $109,089.00
Principal Investigator: Anthony J. Fowler
Organisation: SARDI Food Safety and Innovation
Project start/end date: 19 Oct 2002 - 30 Nov 2004
Contact:
FRDC
SPECIES

Need

Management of the snapper fishery of South Australia has recently attained a level of heightened political sensitivity, reflecting the need to optimise the strategic approach. Nevertheless, from relevant discussions it is apparent that our understanding of the life-history is too poor to predict likely outcomes from suggested regional management strategies.

For this snapper fishery there is a need to optimise management based on a better understanding of the life-history and population biology, particularly with regard movement patterns of adult fish. It is currently unknown the extent to which fish move between different geographic regions, and thus the extent to which such behaviour contributes to the natural processes of sustaining the different regional populations. Such adult movement will determine the extent to which regional populations are independent, discrete, and separate sub-populations. Adult movement and stock structure are fundamental to identifying the appropriate spatial scale at which the population dynamics work, and thus the appropriate spatial scale at which fishery management should be applied.

Objectives

1. to determine whether adult fish from Spencer Gulf, Gulf St. Vincent and other regions migrate to the continental shelf, and where such fish then migrate in order to spawn - do they return to their regions of origin or is subsequent movement determined by other exogenous factors ?
2. to determine the stock structure - does the South Australian snapper population constitute a single, large, inter-mixed population or is it divisible into numerous discrete sub-populations ?
3. to determine whether adult fish collected from particular regions originate as juveniles from those regions or whether they constitute a mixture from different regions.
4. to produce a final report that synthesises all information on snapper movement and stock structure in South Australia, including that from this study on otolith microchemistry with that from tagging studies and work on the analysis of genetics.

Final report

ISBN: 0-7308-5319-5
Author: Anthony Fowler

Related research

Adoption
Blank
PROJECT NUMBER • 2019-085
PROJECT STATUS:
CURRENT

National Snapper Workshop - Rebuilding our iconic Snapper stocks

1. To identify key issues and challenges for Snapper, review Snapper research, and critique jurisdictional management arrangements.
ORGANISATION:
Department of Primary Industries and Regions South Australia (PIRSA)
Environment
PROJECT NUMBER • 2019-046
PROJECT STATUS:
CURRENT

Cost-effective, non-destructive solutions to developing a pre-recruit index for Snapper

1. To develop our understanding of the processes that regulate recruitment based on finalising datasets from previous research projects that relate to the early life history, and larval and juvenile ecology of Snapper, as well as the annual variation in environmental factors
ORGANISATION:
University of Adelaide