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Resumen del producto
Pantoja-Echevarría, L.M., E., Tamburin, A.J., Marmolejo-Rodríguez, F., Galván-Magaña, F.R., Elorriaga-Verplancken, A., Delgado-Huertas, A., Tripp-Valdez, L., Arreola-Mendoza & A., Lara
(2020).
Stable isotopic inferences on trophic ecology and habitat use of brown smooth-hound Mustelus henlei in the west coast of Baja California Sur, Mexico.
Regional Studies in Marine Science.
40: 101520.
DOI: 10.1016/j.rsma.2020.101520.
Stable isotopic inferences on trophic ecology and habitat use of brown smooth-hound Mustelus henlei in the west coast of Baja California Sur, Mexico
Laura María Pantoja-Echevarría, Elena Tamburin, Ana Judith Marmolejo-Rodríguez, Felipe Galván-Magaña, Fernando R. Elorriaga-Verplancken, Antonio Delgado-Huertas, Arturo Tripp-Valdez, Laura Arreola-Mendoza y Arigna Lara
The brown smoothhound shark Mustelus henlei is the most important shark species in the artisanal fisheries of the western coast of Baja California Sur, Mexico. Its trophic ecology was analyzed using carbon (13C) and nitrogen (15N) stable isotope analysis in the muscle tissue. The values of d13C (-18.2 ± 0.6 ‰) and d15N (17.7 ± 0.9 ‰) suggest that this species feeds in the Gulf of Ulloa throughout the year. The low values of d13C indicate that the sharks feed in oceanic zones; while the d15N values suggest that these sharks feed on prey that occupy a high trophic level and/or from a trophic chain with an enriched basal signal. The d13C and d15N values of this species do not present significant statistical differences between sexes and size. This study provides new insights regarding the habitat use of M. henlei, characterizing its preference for oceanic zones.
Palabras clave: Gulf of Ulloa; Trophic ecology; Brown smoothound shark; stable isotopes; d13C; d15N
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