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The use of otolith chemistry to determine stock structure of three epinepheline serranid coral reef fishes on the Great Barrier Reef, Australia

Citation

Bergenius, MAJ and Mapstone, BD and Begg, GA and Murchie, CD, The use of otolith chemistry to determine stock structure of three epinepheline serranid coral reef fishes on the Great Barrier Reef, Australia, Fisheries Research, 72, (2-3) pp. 253-270. ISSN 0165-7836 (2005) [Refereed Article]

DOI: doi:10.1016/j.fishres.2004.10.002

Abstract

We investigated the use of otolith chemistry to identify the stock structure of three epinepheline serranid coral reef fishes: Plectropomus leopardus, Cephalopholis cyanostigma and Epinephelus fasciatus. Chemical signatures of otoliths collected from the three species were compared on a broad regional scale and, for P. leopardus, also on a finer reef scale. The temporal stability in these signals was also examined by comparing two cohorts of P. leopardus, and C. cyanostigma and E. fasciatus from the same cohorts that were collected 2 years before and 2 years after a significant weather disturbance caused by a large tropical cyclone (Cyclone Justin) in March 1997. Results showed differences in otolith chemistry at various spatial scales, as well as between years and individuals collected before and after the cyclone. The results highlight the need to incorporate data from several years in studies using these techniques to discriminate temporary and possibly misleading signals from those that indicate persistent spatial structure in stocks. The difficulties in identifying stocks and stock boundaries in species with spatially complex population structures are discussed, as is the need for complementary analyses of life history characteristics to determine biologically and logistically appropriate management units. © 2004 Elsevier B.V. All rights reserved.

Item Details

Item Type:Refereed Article
Research Division:Biological Sciences
Research Group:Ecology
Research Field:Freshwater Ecology
Objective Division:Environment
Objective Group:Land and Water Management
Objective Field:Land and Water Management of environments not elsewhere classified
Author:Mapstone, BD (Professor Bruce Mapstone)
ID Code:48332
Year Published:2005
Web of Science® Times Cited:32
Deposited By:CRC-Antarctic Climate & Ecosystems
Deposited On:2007-10-05
Last Modified:2011-10-04
Downloads:0

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