Feeding habits of thresher sharks Alopias sp. in northern Peru: predators of Humboldt squid (Dosidicus gigas)

González-Pestana, Adriana, Acuña-Perales, Nicolas, Córdova, Francisco, Coasaca, Javier, Alfaro, Eliana, Alfaro-Shigueto, Joanna, and Mangel, Jeffrey C. (2019) Feeding habits of thresher sharks Alopias sp. in northern Peru: predators of Humboldt squid (Dosidicus gigas). Journal of the Marine Biological Association of the United Kingdom, 99 (3). pp. 695-702.

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Abstract

The stomach contents of thresher sharks (Alopias spp.; 162-385 cm total length) were collected from five landing points in northern Peru during 2015. A total of 128 thresher sharks were sampled, with 38 individuals identified as Alopias pelagicus and 90 aggregated to the genus level Alopias sp. to prevent any misidentification. The diet comprised 13 and 10 prey taxa for Alopias sp. and A. pelagicus, respectively. Humboldt squid Dosidicus gigas dominated the diet of both groups, with only minor differences in the diet in relation to size classes and location. The diet of Alopias shows a high degree of specialization and the average trophic positions were high for both groups, A. pelagicus (4.4 ± 0.13) and Alopias sp. (4.5 ± 0.14).

Item ID: 61837
Item Type: Article (Research - C1)
ISSN: 1469-7769
Keywords: Alopiidae, diet, jumbo squid, small-scale fisheries
Copyright Information: © 2018 Marine Biological Association of the United Kingdom.
Funders: Fondo para la Innovación, la Ciencia y la Tecnología (FINCYT), The DEFRA Darwin Initiative, The United States Embassy in Peru
Projects and Grants: FINCYT PIBA-369-2014
Date Deposited: 25 May 2020 20:14
FoR Codes: 06 BIOLOGICAL SCIENCES > 0602 Ecology > 060205 Marine and Estuarine Ecology (incl Marine Ichthyology) @ 100%
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