Journal
ICES JOURNAL OF MARINE SCIENCE
Volume 70, Issue 1, Pages 164-172Publisher
OXFORD UNIV PRESS
DOI: 10.1093/icesjms/fss164
Keywords
biological markers; fishery management; multivariate analysis; pelagic; Scombridae; stock structure
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Funding
- Winifred Violet Scott Estate
- Royal Zoological Society of NSW
- University of Queensland
- CSIRO Division of Marine and Atmospheric Research
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The wahoo (Acanthocybium solandri) is an increasingly important by-product species of tropical pelagic fisheries worldwide. However, specific management of the species is currently hindered by a dearth of information on basic biology and stock structure. This study examined the stock structure of wahoo using morphometric characters and parasite fauna from fish collected in three regions of the western Pacific, and one region in each of the eastern Pacific and eastern Indian Oceans. Similar morphometric measurements and parasite abundance of wahoo collected off eastern Australia suggest they may form part of a single phenotypic stock in the western Pacific Ocean. Morphometric measurements and parasite fauna were significantly different among wahoo from the western Pacific and eastern Pacific Oceans, suggesting multiple discrete phenotypic stocks despite genetic homogeneity. Assessing fish from a range of regions throughout the Pacific Ocean may help discriminate stock boundaries in this region. Future research using complementary techniques, such as otolith microchemistry and genetic microsatellites, may improve our understanding of the global stock structure of wahoo to suitably inform regional fishery management organizations.
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