Antarctic jaws: cephalopodprey of sharks in Kerguelen waters
15 pages International audience Only five species of sharks have been recorded in the Southern Ocean, where their biology is essentially unknown. We investigatedthe feeding habits of the three commonest species from stomach content analysis of specimens taken as bycatches of the fishery targeting th...
Published in: | Deep Sea Research Part I: Oceanographic Research Papers |
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ftunivnantes:oai:HAL:hal-00186835v1 2023-05-15T13:37:48+02:00 Antarctic jaws: cephalopodprey of sharks in Kerguelen waters Cherel, Yves Duhamel, Guy Centre d'Études Biologiques de Chizé (CEBC) Centre National de la Recherche Scientifique (CNRS) Département Milieux et Peuplements Aquatiques Muséum national d'Histoire naturelle (MNHN) 2004-01 https://hal.science/hal-00186835 https://doi.org/10.1016/j.dsr.2003.09.009 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.dsr.2003.09.009 hal-00186835 https://hal.science/hal-00186835 doi:10.1016/j.dsr.2003.09.009 ISSN: 0146-6291 Deep Sea Research https://hal.science/hal-00186835 Deep Sea Research, 2004, 51, pp.17-31. ⟨10.1016/j.dsr.2003.09.009⟩ Giant squids Kondakovia longimana Lanternsharks Mesonychoteuthis hamiltoni Porbeagles Sleeper sharks Southern Ocean Taningia danae [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.ES]Environmental Sciences/Environmental and Society [SDE.MCG]Environmental Sciences/Global Changes info:eu-repo/semantics/article Journal articles 2004 ftunivnantes https://doi.org/10.1016/j.dsr.2003.09.009 2023-02-08T08:24:02Z 15 pages International audience Only five species of sharks have been recorded in the Southern Ocean, where their biology is essentially unknown. We investigatedthe feeding habits of the three commonest species from stomach content analysis of specimens taken as bycatches of the fishery targeting the Patagonian toothfish (Dissostichus eleginoides) in upper slope waters of the Kerguelen Archipelago. The three species prey upon a diversity of fishes and cephalopods. They segregate by feeding on different species of squids of different sizes. The small lanternsharks (Etmopterus cf. granulosus; 0.3m on average) feed on small-sized Mastigoteuthis psychrophila, while the large porbeagles (Lamna nasus; 1.9 m) feedon small-sized histioteuthids (Histioteuthis atlantica and H. eltaninae) and on medium-sized juvenile ommastrephids of the genus Todarodes. Finally, the huge sleeper sharks (Somniosus cf. microcephalus; 3.9 m) prey upon large-sizedcephalopod s (Kondakovia longimana and Taningia danae) andgiant squids (Mesonychoteuthis hamiltoni and Architeuthis dux). Thus sleeper shark is a fish with sperm whale-like feeding habits and, hence, the second top predator known to science to rely significantly on giant squids. Prey species and biology indicate that porbeagles are pelagic predators in the entire water column, while sleeper sharks are mainly benthic top predators and scavengers. The present study also underlines the diversity and biomass of the poorly known cephalopod fauna, including giant squids, occurring in outer shelf and upper slope waters surrounding subantarctic islands. Article in Journal/Newspaper Antarc* Antarctic Lamna nasus Mesonychoteuthis hamiltoni Patagonian Toothfish Southern Ocean Sperm whale Université de Nantes: HAL-UNIV-NANTES Antarctic Southern Ocean Kerguelen Deep Sea Research Part I: Oceanographic Research Papers 51 1 17 31 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
Giant squids Kondakovia longimana Lanternsharks Mesonychoteuthis hamiltoni Porbeagles Sleeper sharks Southern Ocean Taningia danae [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.ES]Environmental Sciences/Environmental and Society [SDE.MCG]Environmental Sciences/Global Changes |
spellingShingle |
Giant squids Kondakovia longimana Lanternsharks Mesonychoteuthis hamiltoni Porbeagles Sleeper sharks Southern Ocean Taningia danae [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.ES]Environmental Sciences/Environmental and Society [SDE.MCG]Environmental Sciences/Global Changes Cherel, Yves Duhamel, Guy Antarctic jaws: cephalopodprey of sharks in Kerguelen waters |
topic_facet |
Giant squids Kondakovia longimana Lanternsharks Mesonychoteuthis hamiltoni Porbeagles Sleeper sharks Southern Ocean Taningia danae [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.ES]Environmental Sciences/Environmental and Society [SDE.MCG]Environmental Sciences/Global Changes |
description |
15 pages International audience Only five species of sharks have been recorded in the Southern Ocean, where their biology is essentially unknown. We investigatedthe feeding habits of the three commonest species from stomach content analysis of specimens taken as bycatches of the fishery targeting the Patagonian toothfish (Dissostichus eleginoides) in upper slope waters of the Kerguelen Archipelago. The three species prey upon a diversity of fishes and cephalopods. They segregate by feeding on different species of squids of different sizes. The small lanternsharks (Etmopterus cf. granulosus; 0.3m on average) feed on small-sized Mastigoteuthis psychrophila, while the large porbeagles (Lamna nasus; 1.9 m) feedon small-sized histioteuthids (Histioteuthis atlantica and H. eltaninae) and on medium-sized juvenile ommastrephids of the genus Todarodes. Finally, the huge sleeper sharks (Somniosus cf. microcephalus; 3.9 m) prey upon large-sizedcephalopod s (Kondakovia longimana and Taningia danae) andgiant squids (Mesonychoteuthis hamiltoni and Architeuthis dux). Thus sleeper shark is a fish with sperm whale-like feeding habits and, hence, the second top predator known to science to rely significantly on giant squids. Prey species and biology indicate that porbeagles are pelagic predators in the entire water column, while sleeper sharks are mainly benthic top predators and scavengers. The present study also underlines the diversity and biomass of the poorly known cephalopod fauna, including giant squids, occurring in outer shelf and upper slope waters surrounding subantarctic islands. |
author2 |
Centre d'Études Biologiques de Chizé (CEBC) Centre National de la Recherche Scientifique (CNRS) Département Milieux et Peuplements Aquatiques Muséum national d'Histoire naturelle (MNHN) |
format |
Article in Journal/Newspaper |
author |
Cherel, Yves Duhamel, Guy |
author_facet |
Cherel, Yves Duhamel, Guy |
author_sort |
Cherel, Yves |
title |
Antarctic jaws: cephalopodprey of sharks in Kerguelen waters |
title_short |
Antarctic jaws: cephalopodprey of sharks in Kerguelen waters |
title_full |
Antarctic jaws: cephalopodprey of sharks in Kerguelen waters |
title_fullStr |
Antarctic jaws: cephalopodprey of sharks in Kerguelen waters |
title_full_unstemmed |
Antarctic jaws: cephalopodprey of sharks in Kerguelen waters |
title_sort |
antarctic jaws: cephalopodprey of sharks in kerguelen waters |
publisher |
HAL CCSD |
publishDate |
2004 |
url |
https://hal.science/hal-00186835 https://doi.org/10.1016/j.dsr.2003.09.009 |
geographic |
Antarctic Southern Ocean Kerguelen |
geographic_facet |
Antarctic Southern Ocean Kerguelen |
genre |
Antarc* Antarctic Lamna nasus Mesonychoteuthis hamiltoni Patagonian Toothfish Southern Ocean Sperm whale |
genre_facet |
Antarc* Antarctic Lamna nasus Mesonychoteuthis hamiltoni Patagonian Toothfish Southern Ocean Sperm whale |
op_source |
ISSN: 0146-6291 Deep Sea Research https://hal.science/hal-00186835 Deep Sea Research, 2004, 51, pp.17-31. ⟨10.1016/j.dsr.2003.09.009⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.dsr.2003.09.009 hal-00186835 https://hal.science/hal-00186835 doi:10.1016/j.dsr.2003.09.009 |
op_doi |
https://doi.org/10.1016/j.dsr.2003.09.009 |
container_title |
Deep Sea Research Part I: Oceanographic Research Papers |
container_volume |
51 |
container_issue |
1 |
container_start_page |
17 |
op_container_end_page |
31 |
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1766097873641930752 |