Antarctic jaws: cephalopod prey of sharks in Kerguelen waters
Only five species of sharks have been recorded in the Southern Ocean, where their biology is essentially unknown. We investigated the feeding habits of the three commonest species from stomach content analysis of specimens taken as bycatches of the fishery targeting the Patagonian toothfish (Dissost...
Published in: | Deep Sea Research Part I: Oceanographic Research Papers |
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ftoceanrep:oai:oceanrep.geomar.de:53431 2023-05-15T13:56:40+02:00 Antarctic jaws: cephalopod prey of sharks in Kerguelen waters Cherel, Yves Duhamel, Guy 2004-01 text https://oceanrep.geomar.de/id/eprint/53431/ https://oceanrep.geomar.de/id/eprint/53431/1/4127.pdf https://doi.org/10.1016/j.dsr.2003.09.009 en eng Elsevier https://oceanrep.geomar.de/id/eprint/53431/1/4127.pdf Cherel, Y. and Duhamel, G. (2004) Antarctic jaws: cephalopod prey of sharks in Kerguelen waters. Deep Sea Research Part I: Oceanographic Research Papers, 51 (1). pp. 17-31. DOI 10.1016/j.dsr.2003.09.009 <https://doi.org/10.1016/j.dsr.2003.09.009>. doi:10.1016/j.dsr.2003.09.009 info:eu-repo/semantics/restrictedAccess Article PeerReviewed 2004 ftoceanrep https://doi.org/10.1016/j.dsr.2003.09.009 2023-04-07T15:57:35Z Only five species of sharks have been recorded in the Southern Ocean, where their biology is essentially unknown. We investigated the 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; 0.3 m on average) feed on small-sized Mastigoteuthis psychrophila, while the large porbeagles (Lamna nasus; 1.9 m) feed on 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-sized cephalopods (Kondakovia longimana and Taningia danae) and giant 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 OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Antarctic Kerguelen Southern Ocean Deep Sea Research Part I: Oceanographic Research Papers 51 1 17 31 |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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ftoceanrep |
language |
English |
description |
Only five species of sharks have been recorded in the Southern Ocean, where their biology is essentially unknown. We investigated the 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; 0.3 m on average) feed on small-sized Mastigoteuthis psychrophila, while the large porbeagles (Lamna nasus; 1.9 m) feed on 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-sized cephalopods (Kondakovia longimana and Taningia danae) and giant 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. |
format |
Article in Journal/Newspaper |
author |
Cherel, Yves Duhamel, Guy |
spellingShingle |
Cherel, Yves Duhamel, Guy Antarctic jaws: cephalopod prey of sharks in Kerguelen waters |
author_facet |
Cherel, Yves Duhamel, Guy |
author_sort |
Cherel, Yves |
title |
Antarctic jaws: cephalopod prey of sharks in Kerguelen waters |
title_short |
Antarctic jaws: cephalopod prey of sharks in Kerguelen waters |
title_full |
Antarctic jaws: cephalopod prey of sharks in Kerguelen waters |
title_fullStr |
Antarctic jaws: cephalopod prey of sharks in Kerguelen waters |
title_full_unstemmed |
Antarctic jaws: cephalopod prey of sharks in Kerguelen waters |
title_sort |
antarctic jaws: cephalopod prey of sharks in kerguelen waters |
publisher |
Elsevier |
publishDate |
2004 |
url |
https://oceanrep.geomar.de/id/eprint/53431/ https://oceanrep.geomar.de/id/eprint/53431/1/4127.pdf https://doi.org/10.1016/j.dsr.2003.09.009 |
geographic |
Antarctic Kerguelen Southern Ocean |
geographic_facet |
Antarctic Kerguelen Southern Ocean |
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_relation |
https://oceanrep.geomar.de/id/eprint/53431/1/4127.pdf Cherel, Y. and Duhamel, G. (2004) Antarctic jaws: cephalopod prey of sharks in Kerguelen waters. Deep Sea Research Part I: Oceanographic Research Papers, 51 (1). pp. 17-31. DOI 10.1016/j.dsr.2003.09.009 <https://doi.org/10.1016/j.dsr.2003.09.009>. doi:10.1016/j.dsr.2003.09.009 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
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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1766264247747084288 |