Biology

Breaking the fast: first report of dives and ingestion events in molting southern elephant seals

L. M. Charline, L. Chaise, et al.

This groundbreaking research conducted by Laura M. Charline and colleagues reveals that southern elephant seals may not fast during their catastrophic molt as previously thought. Instead, many of these seals engage in diving and ingesting food, showing that favorable conditions can impact their energy conservation during this critical period. Discover how climate change might redefine our understanding of molting in this fascinating species!

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Playback language: English

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Abstract

This study challenges the established paradigm that southern elephant seals (SES) fast during their catastrophic molt. By tracking stomach temperature and movement patterns of molting female SES, the researchers found that a significant portion engaged in diving and ingestion events despite the energetic cost of cold-water exposure. This behavior was linked to favorable weather conditions, and individuals exhibiting more diving and ingestion experienced less body mass loss. The findings suggest a reevaluation of the energetic constraints and fitness consequences of molting in this species, particularly in the context of climate change.

Publisher

COMMUNICATIONS BIOLOGY

Published On

Jan 08, 2024

Authors

Laura M. Charline, Laureline Chaise, Damien Sornette, Erwan Piot, Dominic J. McCafferty, André Ancel, Caroline Gilbert

DOI

https://doi.org/10.1038/s42003-023-05720-2

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