Physiological impairment as a result of bile accumulation in an apex predator, the tiger shark (Galeocerdo cuvier Péron & Lesueur, 1822)

Natascha Wosnick*, Ana Paula Chaves, Yuri Viera Niella, Veronica Takatsuka, Fábio Hissa Vieira Hazin, Jorge Luiz Silva Nunes, Danny Morick

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    2 Citations (Scopus)
    6 Downloads (Pure)

    Abstract

    Physiological adaptations have evolved to help sharks face rapid periods of feast. Tiger sharks are generalist apex predators that rely on a high-lipid/protein diet. To achieve a satisfactory nutritional condition, proper lipid absorption and hepatic storage are needed. Bile secretion in sharks is low and sporadic but increases during short periods of fasting. The present study describes a physiological impairment caused by bile accumulation in juvenile tiger sharks, possibly due to prolonged fasting. These evidences suggest that, even though sharks have adaptations that prevent them from dying from starvation, alarming physiological alterations might occur. Future studies are needed to assess how such a condition can affect wild populations, as well as possible sublethal consequences that could impact their long-term survival.

    Original languageEnglish
    Article number2030
    Pages (from-to)1-13
    Number of pages13
    JournalAnimals
    Volume10
    Issue number11
    DOIs
    Publication statusPublished - Nov 2020

    Bibliographical note

    Copyright the Author(s) 2020. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

    Keywords

    • Gallbladder
    • Hepatobiliary alteration
    • Physiological markers

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