Spawning cycle of onychoteuthid squids in the southern Indian Ocean:new information from seabird predators
Cephalopods play an important role in the trophic web of the Southern Ocean, but little information is available on their biology. The 2 largest sub-Antarctic seabirds, the king penguin Aptenodytes patagonicus and the wandering albatross Diomedea exulans, feed primarily on squids during the austral...
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Language: | English |
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Inter Research
1999
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Online Access: | https://oceanrep.geomar.de/id/eprint/52866/ https://oceanrep.geomar.de/id/eprint/52866/1/3585.pdf https://www.int-res.com/abstracts/meps/v188/p93-104/ https://doi.org/10.3354/meps188093 |
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ftoceanrep:oai:oceanrep.geomar.de:52866 2023-05-15T13:50:03+02:00 Spawning cycle of onychoteuthid squids in the southern Indian Ocean:new information from seabird predators Cherel, Yves Weimerskirch, Henri 1999 text https://oceanrep.geomar.de/id/eprint/52866/ https://oceanrep.geomar.de/id/eprint/52866/1/3585.pdf https://www.int-res.com/abstracts/meps/v188/p93-104/ https://doi.org/10.3354/meps188093 en eng Inter Research https://oceanrep.geomar.de/id/eprint/52866/1/3585.pdf Cherel, Y. and Weimerskirch, H. (1999) Spawning cycle of onychoteuthid squids in the southern Indian Ocean:new information from seabird predators. Open Access Marine Ecology Progress Series, 188 . pp. 93-104. DOI 10.3354/meps188093 <https://doi.org/10.3354/meps188093>. doi:10.3354/meps188093 cc_by_4.0 info:eu-repo/semantics/openAccess Article PeerReviewed 1999 ftoceanrep https://doi.org/10.3354/meps188093 2023-04-07T15:56:31Z Cephalopods play an important role in the trophic web of the Southern Ocean, but little information is available on their biology. The 2 largest sub-Antarctic seabirds, the king penguin Aptenodytes patagonicus and the wandering albatross Diomedea exulans, feed primarily on squids during the austral winter at the Crozet Islands. We examined a large number of accumulated cephalopod beaks in the stomach of these birds together with some undigested items; first, to understand how these 2 predators share the squid resource during winter, a period of supposed low food availability, and, second, to use a diving and a flying seabird as biological samplers of Southern Ocean cephalopods. Individuals of the family Onychoteuthidae formed the bulk of the squid diet, accounting for 72.6 and 57.0% of the number of lower beaks in samples from king penguins and wandering albatrosses, respectively. Seven different species were identified, the 3 main squids being Kondakovia longimana (38.8 and 28.0% by number for penguins and albatrosses, respectively), Moroteuthis ingens (13.5 and 26.2%) and M. knipovitchi (20.1 and 2.3%). Both seabirds preyed upon the same cephalopod species, but penguins primarily took small- to medium-sized juveniles (99.0% of the onychoteuthids) and albatrosses preyed on larger adult specimens (96.0%). Fresh remains indicated that adult K. longimana and M. ingens were mature individuals which, as shown by satellite tracking of albatrosses, were taken over the slope and nearby oceanic waters surrounding the archipelago. The present study indicates that mating/spawning of K. longimana and M. ingens occurs in Crozet waters during the winter months. It also extends the biogeography of K. longimana to north of the Antarctic Polar Front, in the Polar Frontal Zone, where it has not previously been recorded. Article in Journal/Newspaper Antarc* Antarctic Crozet Islands Diomedea exulans King Penguins Southern Ocean Wandering Albatross OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Antarctic Austral Indian Southern Ocean The Antarctic Marine Ecology Progress Series 188 93 104 |
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Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
Cephalopods play an important role in the trophic web of the Southern Ocean, but little information is available on their biology. The 2 largest sub-Antarctic seabirds, the king penguin Aptenodytes patagonicus and the wandering albatross Diomedea exulans, feed primarily on squids during the austral winter at the Crozet Islands. We examined a large number of accumulated cephalopod beaks in the stomach of these birds together with some undigested items; first, to understand how these 2 predators share the squid resource during winter, a period of supposed low food availability, and, second, to use a diving and a flying seabird as biological samplers of Southern Ocean cephalopods. Individuals of the family Onychoteuthidae formed the bulk of the squid diet, accounting for 72.6 and 57.0% of the number of lower beaks in samples from king penguins and wandering albatrosses, respectively. Seven different species were identified, the 3 main squids being Kondakovia longimana (38.8 and 28.0% by number for penguins and albatrosses, respectively), Moroteuthis ingens (13.5 and 26.2%) and M. knipovitchi (20.1 and 2.3%). Both seabirds preyed upon the same cephalopod species, but penguins primarily took small- to medium-sized juveniles (99.0% of the onychoteuthids) and albatrosses preyed on larger adult specimens (96.0%). Fresh remains indicated that adult K. longimana and M. ingens were mature individuals which, as shown by satellite tracking of albatrosses, were taken over the slope and nearby oceanic waters surrounding the archipelago. The present study indicates that mating/spawning of K. longimana and M. ingens occurs in Crozet waters during the winter months. It also extends the biogeography of K. longimana to north of the Antarctic Polar Front, in the Polar Frontal Zone, where it has not previously been recorded. |
format |
Article in Journal/Newspaper |
author |
Cherel, Yves Weimerskirch, Henri |
spellingShingle |
Cherel, Yves Weimerskirch, Henri Spawning cycle of onychoteuthid squids in the southern Indian Ocean:new information from seabird predators |
author_facet |
Cherel, Yves Weimerskirch, Henri |
author_sort |
Cherel, Yves |
title |
Spawning cycle of onychoteuthid squids in the southern Indian Ocean:new information from seabird predators |
title_short |
Spawning cycle of onychoteuthid squids in the southern Indian Ocean:new information from seabird predators |
title_full |
Spawning cycle of onychoteuthid squids in the southern Indian Ocean:new information from seabird predators |
title_fullStr |
Spawning cycle of onychoteuthid squids in the southern Indian Ocean:new information from seabird predators |
title_full_unstemmed |
Spawning cycle of onychoteuthid squids in the southern Indian Ocean:new information from seabird predators |
title_sort |
spawning cycle of onychoteuthid squids in the southern indian ocean:new information from seabird predators |
publisher |
Inter Research |
publishDate |
1999 |
url |
https://oceanrep.geomar.de/id/eprint/52866/ https://oceanrep.geomar.de/id/eprint/52866/1/3585.pdf https://www.int-res.com/abstracts/meps/v188/p93-104/ https://doi.org/10.3354/meps188093 |
geographic |
Antarctic Austral Indian Southern Ocean The Antarctic |
geographic_facet |
Antarctic Austral Indian Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Crozet Islands Diomedea exulans King Penguins Southern Ocean Wandering Albatross |
genre_facet |
Antarc* Antarctic Crozet Islands Diomedea exulans King Penguins Southern Ocean Wandering Albatross |
op_relation |
https://oceanrep.geomar.de/id/eprint/52866/1/3585.pdf Cherel, Y. and Weimerskirch, H. (1999) Spawning cycle of onychoteuthid squids in the southern Indian Ocean:new information from seabird predators. Open Access Marine Ecology Progress Series, 188 . pp. 93-104. DOI 10.3354/meps188093 <https://doi.org/10.3354/meps188093>. doi:10.3354/meps188093 |
op_rights |
cc_by_4.0 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3354/meps188093 |
container_title |
Marine Ecology Progress Series |
container_volume |
188 |
container_start_page |
93 |
op_container_end_page |
104 |
_version_ |
1766252793202475008 |