Determination of management units for grey mackerel fisheries in northern Australia

Welch, D. J., Buckworth, R. C., Ovenden, J. R., Newman, S. J., Broderick, D., Lester, R. J. G., Ballagh, A. C., Stapley, J. M., Charters, R. A. and Gribble, N. A. (2009) Determination of management units for grey mackerel fisheries in northern Australia Townsville, Queensland, Australia: Fishing & Fisheries Research Centre, James Cook University

Author Welch, D. J.
Buckworth, R. C.
Ovenden, J. R.
Newman, S. J.
Broderick, D.
Lester, R. J. G.
Ballagh, A. C.
Stapley, J. M.
Charters, R. A.
Gribble, N. A.
Title of report Determination of management units for grey mackerel fisheries in northern Australia
Publication date 2009
ISBN 780980558630
Publisher Fishing & Fisheries Research Centre, James Cook University
Place of publication Townsville, Queensland, Australia
Total pages 158
Language eng
Subjects 0704 Fisheries Sciences
070402 Aquatic Ecosystem Studies and Stock Assessment
070403 Fisheries Management
Formatted abstract
The requirement for Queensland, Northern Territory and Western Australian jurisdictions to ensure sustainable harvest of fish resources and their optimal use relies on robust information on the resource status. For grey mackerel (Scomberomorus semifasciatus) fisheries, each of these jurisdictions has their own management regime in their corresponding waters. The lack of information on stock structure of grey mackerel, however, means that the appropriate spatial scale of management is not known. As well, fishers require assurance of future sustainability to encourage investment and long-term involvement in a fishery that supplies lucrative overseas markets. These management and fisher-unfriendly circumstances must be viewed in the context of recent 3-fold increases in catches of grey mackerel along the Queensland east coast, combined with significant and increasing catches in other parts of the species' northern Australian range. Establishing the stock structure of grey mackerel would also immensely improve the relevance of resource assessments for fishery management of grey mackerel across northern Australia. This highlighted the urgent need for stock structure information for this species.

1. To determine the spatial and temporal stock structure of grey mackerel over its
northern Australian range.
2. To use stock structure information in defining the geographic framework and
appropriate management units required by Queensland and Northern Territory
fisheries agencies for sustainable management planning of grey mackerel resources.
Keyword Grey mackerel
Scomberomorus semifasciatus
stock structure
spatial dynamics
otolith isotope ratios
population genetics
Q-Index Code AX
Q-Index Status Provisional Code

Document type: Research Report
Collection: School of Chemistry and Molecular Biosciences
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Created: Wed, 22 Sep 2010, 10:05:33 EST by Laura McTaggart on behalf of Faculty of Science