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October 22, 2025Royal Society Open ScienceOpen Access

Seasonal and inter-annual dynamics in the energy seascapes of a marine top predator

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Authors

AFAurélien FavreauIfremerJSJérôme SpitzCentre National de la Recherche ScientifiqueMHMartin HuretIfremer

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Overview

Assessment reveals spatial changes in prey energy and declines in larger fish affecting predator–prey interactions.

Key Points

  • Energy density in small horse mackerel and sprat shows significant change amidst shifting marine conditions, impacting predator–prey dynamics.
  • Acoustic survey data from PELGAS and JUVENA indicated varied prey energy availability due to decreases in fish size.
  • Analysis over 23 years highlighted spatial changes, with larger sardine populations moving coastal, while anchovies expanded northward.
  • These findings suggest climate-driven dynamics influence foraging behavior of common dolphins, increasing risk of by-catch.

Cite This Study

Favreau et al. (2025) studied this question.

synapsesocial.com/papers/68f8a381c0c01e5ef8abde56https://doi.org/10.1098/rsos.250929
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