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June 28, 2024Environmental ResearchOpen Access

Can biochemical tracers reveal ontogenetic trophic shift and individual prey selection in white sharks from Guadalupe Island, Northeast Pacific?

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Authors

GCGaël Le CroizierMHMauricio Hoyos‐PadillaFAFelipe Amezcua

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Overview

Observational analysis reveals uniform dietary tracers across white shark life stages, highlighting individual foraging trade-offs between fat and polyunsaturated fatty acids.

Key Points

  • White sharks show no significant ontogenetic trophic shift in muscle stable isotope or fatty acid composition between juveniles and adults.
  • Most sharks had high polyunsaturated fatty acids like omega-3, while select individuals showed higher saturated and monounsaturated fatty acids.
  • Assessment using carbon/nitrogen stable isotopes and fatty acid profiling characterized the trophic ecology of sharks at Guadalupe Island.

Cite This Study

Croizier et al. (2024) studied this question.

synapsesocial.com/papers/68e62c2eb6db6435875bee81https://doi.org/10.1016/j.envres.2024.119507
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  5. 5Evidence of interactions between white sharks and large squids in Guadalupe Island, Mexico2020 · 13 citations