Revisiting taxonomy of cephalopod prey of sperm whales caught commercially in subtropical and Southern Ocean waters
International audience The sperm whale is the largest toothed whale that feeds almost exclusively on oceanic cephalopods. Since it wasactively hunted commercially, considerably more is known about its food than for many other large marine apexpredators. However, the use of those unique dietary infor...
Published in: | Deep Sea Research Part I: Oceanographic Research Papers |
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Online Access: | https://hal.archives-ouvertes.fr/hal-03179766 https://doi.org/10.1016/j.dsr.2021.103490 |
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ftccsdartic:oai:HAL:hal-03179766v1 2023-05-15T13:45:04+02:00 Revisiting taxonomy of cephalopod prey of sperm whales caught commercially in subtropical and Southern Ocean waters Cherel, Yves Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) Université de La Rochelle (ULR)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) 2021-03 https://hal.archives-ouvertes.fr/hal-03179766 https://doi.org/10.1016/j.dsr.2021.103490 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.dsr.2021.103490 hal-03179766 https://hal.archives-ouvertes.fr/hal-03179766 doi:10.1016/j.dsr.2021.103490 ISSN: 0967-0637 Deep Sea Research Part I: Oceanographic Research Papers https://hal.archives-ouvertes.fr/hal-03179766 Deep Sea Research Part I: Oceanographic Research Papers, Elsevier, 2021, 169, pp.103490. ⟨10.1016/j.dsr.2021.103490⟩ Antarctica Cetacean Histioteuthidae Odontocete Squid Trophic relationships [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2021 ftccsdartic https://doi.org/10.1016/j.dsr.2021.103490 2021-10-23T23:52:38Z International audience The sperm whale is the largest toothed whale that feeds almost exclusively on oceanic cephalopods. Since it wasactively hunted commercially, considerably more is known about its food than for many other large marine apexpredators. However, the use of those unique dietary information is today hampered by out-of-date cephalopodtaxonomy. Here, the names of cephalopod prey of sperm whales were revisited by reviewing taxonomic investigationsand tracking over time the names of sclerotized beaks that accumulate in predators’ stomachs. Thestudy focused on the seminal investigations by Clarke (1980) and Clarke and MacLeod (1982), which form thebasis of our knowledge on the feeding habits of sperm whales in the Southern Hemisphere. Forty-five differentbeaks were identified, of which the labelling of 24% taxa is valid today, 7% are still undetermined, and the nameof the 69% remaining beaks had to be changed due to improvement in both taxonomy (31%) and beak identification(27%), and to initial misidentifications (11%). Few taxonomic changes occurred at the family level, butchanges at the species level are substantial and reveal the dietary importance of poorly known squid species (e.g.Galiteuthis suhmi, Histioteuthis macrohista). Within the southern subtropics, sperm whales feed primarily on fivehistioteuthids, with Histioteuthis atlantica ranking first numerically, and on octopoteuthids, cranchiids andonychoteuthids. In contrast, whales caught in the Antarctic prey mainly upon three species of Southern Oceanendemics, the cranchiid Mesonychoteuthis hamiltoni, and the onychoteuthids Filippovia knipovitchi and Moroteuthopsislongimana. In conclusion, revisiting taxonomy allowed a better understanding of the deep-sea ecosystemby improving our knowledge on oceanic cephalopods and on the feeding habits of sperm whales, a cephalopodpredator that has a key trophic role in the oceans. Article in Journal/Newspaper Antarc* Antarctic Antarctica Mesonychoteuthis hamiltoni Southern Ocean Sperm whale toothed whale Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Antarctic Macleod ENVELOPE(-61.966,-61.966,-64.091,-64.091) Southern Ocean The Antarctic Deep Sea Research Part I: Oceanographic Research Papers 169 103490 |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
Antarctica Cetacean Histioteuthidae Odontocete Squid Trophic relationships [SDE]Environmental Sciences |
spellingShingle |
Antarctica Cetacean Histioteuthidae Odontocete Squid Trophic relationships [SDE]Environmental Sciences Cherel, Yves Revisiting taxonomy of cephalopod prey of sperm whales caught commercially in subtropical and Southern Ocean waters |
topic_facet |
Antarctica Cetacean Histioteuthidae Odontocete Squid Trophic relationships [SDE]Environmental Sciences |
description |
International audience The sperm whale is the largest toothed whale that feeds almost exclusively on oceanic cephalopods. Since it wasactively hunted commercially, considerably more is known about its food than for many other large marine apexpredators. However, the use of those unique dietary information is today hampered by out-of-date cephalopodtaxonomy. Here, the names of cephalopod prey of sperm whales were revisited by reviewing taxonomic investigationsand tracking over time the names of sclerotized beaks that accumulate in predators’ stomachs. Thestudy focused on the seminal investigations by Clarke (1980) and Clarke and MacLeod (1982), which form thebasis of our knowledge on the feeding habits of sperm whales in the Southern Hemisphere. Forty-five differentbeaks were identified, of which the labelling of 24% taxa is valid today, 7% are still undetermined, and the nameof the 69% remaining beaks had to be changed due to improvement in both taxonomy (31%) and beak identification(27%), and to initial misidentifications (11%). Few taxonomic changes occurred at the family level, butchanges at the species level are substantial and reveal the dietary importance of poorly known squid species (e.g.Galiteuthis suhmi, Histioteuthis macrohista). Within the southern subtropics, sperm whales feed primarily on fivehistioteuthids, with Histioteuthis atlantica ranking first numerically, and on octopoteuthids, cranchiids andonychoteuthids. In contrast, whales caught in the Antarctic prey mainly upon three species of Southern Oceanendemics, the cranchiid Mesonychoteuthis hamiltoni, and the onychoteuthids Filippovia knipovitchi and Moroteuthopsislongimana. In conclusion, revisiting taxonomy allowed a better understanding of the deep-sea ecosystemby improving our knowledge on oceanic cephalopods and on the feeding habits of sperm whales, a cephalopodpredator that has a key trophic role in the oceans. |
author2 |
Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) Université de La Rochelle (ULR)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) |
format |
Article in Journal/Newspaper |
author |
Cherel, Yves |
author_facet |
Cherel, Yves |
author_sort |
Cherel, Yves |
title |
Revisiting taxonomy of cephalopod prey of sperm whales caught commercially in subtropical and Southern Ocean waters |
title_short |
Revisiting taxonomy of cephalopod prey of sperm whales caught commercially in subtropical and Southern Ocean waters |
title_full |
Revisiting taxonomy of cephalopod prey of sperm whales caught commercially in subtropical and Southern Ocean waters |
title_fullStr |
Revisiting taxonomy of cephalopod prey of sperm whales caught commercially in subtropical and Southern Ocean waters |
title_full_unstemmed |
Revisiting taxonomy of cephalopod prey of sperm whales caught commercially in subtropical and Southern Ocean waters |
title_sort |
revisiting taxonomy of cephalopod prey of sperm whales caught commercially in subtropical and southern ocean waters |
publisher |
HAL CCSD |
publishDate |
2021 |
url |
https://hal.archives-ouvertes.fr/hal-03179766 https://doi.org/10.1016/j.dsr.2021.103490 |
long_lat |
ENVELOPE(-61.966,-61.966,-64.091,-64.091) |
geographic |
Antarctic Macleod Southern Ocean The Antarctic |
geographic_facet |
Antarctic Macleod Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Antarctica Mesonychoteuthis hamiltoni Southern Ocean Sperm whale toothed whale |
genre_facet |
Antarc* Antarctic Antarctica Mesonychoteuthis hamiltoni Southern Ocean Sperm whale toothed whale |
op_source |
ISSN: 0967-0637 Deep Sea Research Part I: Oceanographic Research Papers https://hal.archives-ouvertes.fr/hal-03179766 Deep Sea Research Part I: Oceanographic Research Papers, Elsevier, 2021, 169, pp.103490. ⟨10.1016/j.dsr.2021.103490⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.dsr.2021.103490 hal-03179766 https://hal.archives-ouvertes.fr/hal-03179766 doi:10.1016/j.dsr.2021.103490 |
op_doi |
https://doi.org/10.1016/j.dsr.2021.103490 |
container_title |
Deep Sea Research Part I: Oceanographic Research Papers |
container_volume |
169 |
container_start_page |
103490 |
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