Population structure and residency of whale sharks Rhincodon typus at Utila,Bay Islands,Honduras |
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| Authors: | S. Fox I. Foisy R. De La Parra Venegas B. E. Galván Pastoriza R. T. Graham E. R. Hoffmayer J. Holmberg S. J. Pierce |
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| Affiliation: | 1. Utila Whale Shark Research, , Utila, Honduras;2. Ch ooj Ajauil AC, , Cancún, Quintana Roo, México;3. Wildlife Conservation Society, Gulf and Caribbean Sharks and Rays Program, , Punta Gorda, Belize;4. National Marine Fisheries Service, Southeast Fisheries Science Center, Mississippi Laboratories, , Pascagoula, MS, 39567 U.S.A.;5. ECOCEAN USA, , Portland, OR, 97217 U.S.A.;6. Marine Megafauna Foundation, Tofo Beach, , Inhambane, Mozambique |
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| Abstract: | ![]()
There were 479 reported whale shark Rhincodon typus encounters between 1999 and 2011 at the island of Utila, which forms part of the Meso‐American Barrier Reef System (MBRS) in the western Caribbean Sea. The majority of R. typus were found to feed on small bait fish associated with various tuna species. Ninety‐five individual R. typus, ranging from 2 to 11 m total length (LT), were identified through their unique spot patterns. A significant male bias (65%) was present. There was no significant difference between the mean ± s.d . LT of female (6·66 ± 1·65 m) and male (6·25 ± 1·60 m) R. typus. Most R. typus were transient to Utila, with 78% sighted only within a single calendar year, although some individuals were sighted in up to 5 years. Mean residency time was modelled to be 11·76 days using maximum likelihood methods. |
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| Keywords: | Atlantic movement philopatry sexual segregation site fidelity |
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