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, Ariagna Lara

    Research output: Contribution to journalArticlepeer-review

    Abstract

    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 δ13C (−18.2 ± 0.6 ‰) and δ15N (17.7 ± 0.9 ‰) suggest that this species feeds in the Gulf of Ulloa throughout the year. The low values of δ13C indicate that the sharks feed in oceanic zones; while the δ15N 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 δ13C and δ15N 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.

    Original languageEnglish
    Article number101520
    JournalRegional Studies in Marine Science
    Volume40
    DOIs
    StatePublished - Nov 2020

    Keywords

    • Brown smoothound shark
    • Gulf of Ulloa
    • Stable isotopes
    • Trophic ecology
    • δC
    • δN

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