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Examining the functional role of current area closures used for the conservation of an overexploited and highly mobile fishery species

Citation

McAllister, JD and Barnett, A and Lyle, JM and Semmens, JM, Examining the functional role of current area closures used for the conservation of an overexploited and highly mobile fishery species, ICES Journal of Marine Science, 72, (8) pp. 2234-2244. ISSN 1054-3139 (2015) [Refereed Article]

Copyright Statement

Copyright 2015 International Council for the Exploration of the Sea

DOI: doi:10.1093/icesjms/fsv079

Abstract

Protecting essential habitats through the implementation of area closures has been recognized as a useful management tool for rebuilding overfished populations and minimizing habitat degradation. School shark (Galeorhinus galeus) have suffered significant stock declines in Australia; however, recent stock assessments suggest the population may have stabilized and the protection of closed nursery areas has been identified as a key management strategy to rebuilding their numbers. Young-of-the-year (YOY) and juvenile G. galeus were acoustically tagged and monitored to determine ontogenetic differences in residency and seasonal use of an important protected nursery area (Shark Refuge Area or SRA) in southeastern Tasmania. Both YOY and juvenile G. galeus showed a distinct seasonal pattern of occurrence in the SRA with most departing the area during winter and only a small proportion of YOY (33%) and no juveniles returning the following spring, suggesting areas outside the SRA may also be important during these early life-history stages. While these behaviors confirm SRAs continue to function as essential habitat during G. galeus early life history, evidence of YOY and juveniles emigrating from these areas within their first 12 years and the fact that few YOY return suggest that these areas may only afford protection for a more limited amount of time than previously thought. Determining the importance of neighbouring coastal waters and maintaining the use of traditional fisheries management tools are therefore required to ensure effective conservation of G. galeus during early life history.

Item Details

Item Type:Refereed Article
Keywords:acoustic telemetry, functional role, Galeorhinus galeus, nursery area
Research Division:Agricultural and Veterinary Sciences
Research Group:Fisheries Sciences
Research Field:Aquatic Ecosystem Studies and Stock Assessment
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - Wild Caught
Objective Field:Fisheries - Wild Caught not elsewhere classified
Author:McAllister, JD (Mr Jaime McAllister)
Author:Barnett, A (Dr Adam Barnett)
Author:Lyle, JM (Dr Jeremy Lyle)
Author:Semmens, JM (Associate Professor Jayson Semmens)
ID Code:101196
Year Published:2015
Web of Science® Times Cited:3
Deposited By:IMAS Research and Education Centre
Deposited On:2015-06-11
Last Modified:2017-11-04
Downloads:0

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