The use of otolith morphology to indicate the stock structure ofcommon coral trout (Plectropomus leopardus) on the Great Barrier Reef,Australia

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作   者：

Bergenius MAJ;  Begg GA;  Mapstone BD; 

作者机构：

Townsville;  James Cook University;  [mailto:mikaela.b;  Australia;  CRC (Cooperative Research Centre) Reef Research Centre and School of CRC (Cooperative Research Centre) Reef Research Centre and School of Marine Biology and Aquaculture;  Queensland 4811; 

关键词：

Coral reefs;  Plectropomus leopardus;  Otoliths;  Stocks;  Fishery Barrier reefs;  Fourier analysis;  Hurricanes;  Australia;  Great Barrier Reef;  Barrier reefs;  Body size;  Queensland;  Fishery biology;  ISEW; 

期刊名称：

Fishery Bulletin

i s s n：

0090-0656

年卷期：

2006 年 104 卷 4 期

页   码：

498-511

页   码：

摘   要：

We investigated the use of otolith morphology to indicate the stock structure of an exploited serranid coral reef fish, Plectropomus leopardus, on the Great Barrier Reef (GBR), Australia. Otoliths were measured by traditional one- and two-dimensional measures (otolith length, width, area, perimeter, circularity, and rectangularity), as well as by Fourier analysis to capture the finer details of otolith shape. Variables were compared among four regions of the GBR separated by hundreds of kilometers, as well as among three reefs within each region, hundreds of meters to tens of kilometers apart. The temporal stability in otolith structure was examined by comparing two cohorts of fully recruited four-year-old P. leopardus collected two years before and two years after a significant disturbance in the southern parts of the GBR caused by a large tropical cyclone in March 1997. Results indicated the presence of at least two stocks of P. leopardus, although the structure of each stock varied depending on the cohort considered. The results highlight the importance of incorporating data from several years in studies using otolith morphology to discriminate temporary and possibly misleading signals from those that indicate persistent spatial structure in stocks. We conclude that otolith morphology can be used as an initial step to direct further research on groups of P. leopardus that have lived at least a part of their life in different environments.