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Identifying individual great barracuda Sphyraena barracuda using natural body marks

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Natural body marks on Sphyraena barracuda were recorded with digital images to identify individual fish. Over 18 months, 60 fish were photographed in situ, eight of which were re-photographed at later dates. Re-photographed fish were all large adults (>70 cm total length) and were all seen within 200 m of the site where they were originally observed 10–318 days prior. Over the same period and area, 116 fish were tagged using T-bar tags, yet none of these fish were recaptured. Natural body marks are thus an effective means of identifying and monitoring behaviour of individuals.
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Keywords: Sphyraena barracuda; fish behaviour; natural tagging

Document Type: Research Article

Affiliations: The School for Field Studies, Center for Marine Resource Studies, South Caicos, Turks and Caicos Islands

Publication date: 2006-09-01

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