Author:
Becerril-García Edgar E.,Bernot-Simon Daniela,Arellano-Martínez Marcial,Galván-Magaña Felipe,Santana-Morales Omar,Hoyos-Padilla Edgar M.
Abstract
AbstractShark-cephalopod interactions have been documented in trophic ecology studies around the world. However, there is little information about the encounters between white sharks Carcharodon carcharias and squids in the eastern North Pacific Ocean. Here we provide evidence of interactions between white sharks and large squids in the waters of Guadalupe Island, Mexico. Through the use of non-invasive techniques, we found the presence of evident scars made by large squids on the body of the white sharks, mainly on the head and trunk, of at least 14 sharks recorded during August–December in the years 2008, 2012, 2013, 2017 and 2019. The mean length of the white sharks was 3.7 m (SD ± 0.6; total length), although the majority of the sharks with scars were adult and subadult males (n = 9; 64%). One of these males was photographically recaptured during the same season in which the individual showed new scars, confirming that the squid-white shark interaction likely occurs near Guadalupe Island. Our results highlight the importance of the twilight zone for white sharks and the use of shared habitat and trophic interactions between squid and white sharks, in which future ecosystem studies should consider both species for management and conservation purposes.
Funder
Alianza WWF-Fundación Telmex Telcel
Alianza WWF-Fundación Carlos Slim
Fins Attached
Charles Annenberg Foundation
Consejo Nacional de Ciencia y Tecnología
Idea Wild
Instituto Politécnico Nacional, COFAA and EDI
Publisher
Springer Science and Business Media LLC
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