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Journal articles

Smaller fish species in a warm and oxygen-poor Humboldt Current system

Renato Salvatteci 1 Ralph Schneider 2 Eric Galbraith 3 David Field 4 Thomas Blanz 2 Thorsten Bauersachs 2 Xavier Crosta 5 Philippe Martinez 5 Vincent Echevin 6 Florian Scholz 7 Arnaud Bertrand 8
1 Center for Ocean and Society, Christian-Albrechts-Universität zu Kiel, Kiel, Germany
2 Institute of Geosciences [Kiel]
3 EPS - Department of Earth and Planetary Sciences [Montréal]
4 College of Natural Sciences
5 EPOC - UMR 5805 Environnements et Paléoenvironnements Océaniques et Continentaux
6 PROTEO - Processus et interactions de fine échelle océanique
LOCEAN - Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques
7 GEOMAR - Helmholtz Centre for Ocean Research [Kiel]
8 UMR MARBEC - MARine Biodiversity Exploitation and Conservation
Abstract : Climate change is expected to result in smaller fish size, but the influence of fishing has made it difficult to substantiate the theorized link between size and ocean warming and deoxygenation. We reconstructed the fish community and oceanographic conditions of the most recent global warm period (last interglacial; 130 to 116 thousand years before present) by using sediments from the northern Humboldt Current system off the coast of Peru, a hotspot of small pelagic fish productivity. In contrast to the present-day anchovy-dominated state, the last interglacial was characterized by considerably smaller (mesopelagic and goby-like) fishes and very low anchovy abundance. These small fish species are more difficult to harvest and are less palatable than anchovies, indicating that our rapidly warming world poses a threat to the global fish supply.
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https://hal-cnrs.archives-ouvertes.fr/hal-03529788
Contributor : Xavier Crosta Connect in order to contact the contributor
Submitted on : Friday, January 28, 2022 - 8:43:18 AM
Last modification on : Thursday, April 7, 2022 - 1:58:16 PM

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CNRS | PSL | EPHE | INSU | FR-636 | UP-SCIENCES | ENS-PARIS | CEA | X | UNIV-MONTPELLIER | LOCEAN | SORBONNE-UNIVERSITE | MNHN | B3ESTE | SU-SCIENCES | UVSQ | IP_PARIS | MARBEC | UNIV-PARIS-SACLAY | UNIV-PARIS

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Renato Salvatteci, Ralph Schneider, Eric Galbraith, David Field, Thomas Blanz, et al.. Smaller fish species in a warm and oxygen-poor Humboldt Current system. Science, American Association for the Advancement of Science (AAAS), 2022, ⟨10.1126/science.abj0270⟩. ⟨hal-03529788⟩

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