Seasonal changes in biomass, growth rates and production of subantarctic calanoid copepods in the Bay of Morbihan, Kerguelen Islands
International audience The present study addresses the ecology of two dominant copepod species in the Bay of Morbihan, Kerguelen Archipelago. The biomass of the herbivore Drepanopus pectinatus (from 2 mg m)3 in winter up to 500 mg m)3 in summer) is tightly coupled to seasonal changes in chlorophyll...
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Online Access: | https://doi.org/10.1007/s00227-002-0976-5 https://hal.archives-ouvertes.fr/hal-00189197 |
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fttriple:oai:gotriple.eu:10670/1.ldhz5k 2023-05-15T13:53:54+02:00 Seasonal changes in biomass, growth rates and production of subantarctic calanoid copepods in the Bay of Morbihan, Kerguelen Islands Alonzo, F. Mayzaud, Patrick Razouls, Suzanne Bocher, Pierrick Cherel, Yves Laboratoire d'océanographie de Villefranche (LOV) Observatoire océanologique de Villefranche-sur-mer (OOVM) Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) Observatoire océanologique de Banyuls (OOB) Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) Centre de Recherche sur les Ecosystèmes Littoraux Anthropisés (CRELA) Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de La Rochelle (ULR)-Centre National de la Recherche Scientifique (CNRS) Centre d'études biologiques de Chizé (CEBC) Centre National de la Recherche Scientifique (CNRS) 2003-01-01 https://doi.org/10.1007/s00227-002-0976-5 https://hal.archives-ouvertes.fr/hal-00189197 en eng HAL CCSD Springer Verlag hal-00189197 doi:10.1007/s00227-002-0976-5 10670/1.ldhz5k https://hal.archives-ouvertes.fr/hal-00189197 undefined Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 0025-3162 EISSN: 1432-1793 Marine Biology Marine Biology, Springer Verlag, 2003, 142, pp.525-536. ⟨10.1007/s00227-002-0976-5⟩ envir geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2003 fttriple https://doi.org/10.1007/s00227-002-0976-5 2023-01-22T17:01:18Z International audience The present study addresses the ecology of two dominant copepod species in the Bay of Morbihan, Kerguelen Archipelago. The biomass of the herbivore Drepanopus pectinatus (from 2 mg m)3 in winter up to 500 mg m)3 in summer) is tightly coupled to seasonal changes in chlorophyll a concentration in the region, whereas the biomass of the predatory euchaetiid Paraeuchaeta antarctica increases during two distinct periods over the year: 250 mg m)3 in early summer, with the recruitment of the annual generation, and 100 mg m)3 in autumn, with the deposition of lipids as energy reserves in C5 stages and adults. The juvenile growth rates predicted by temperature-dependent models (0.09 day)1) closely approximate those observed in D. pectinatusin summer, but are much greater than those observed in P. antarctica (from 0.001 to 0.04 day)1 depending on developmental stages). This difference can be explained by the reproductive strategies and trophic positions of the two species and may also result from the dependence of larval growth on energy reserves in P. antarctica. The production rates are five- and tenfold greater in juvenile stages than in adults, respectively, for D. pectinatus and P. antarctica. The secondary production by D. pectinatusis insufficient to support P. antarctica during winter, when the predatory species probably shifts to alternate prey. In summer the predation by P. antarctica accounts for only a minor part of the mortality estimated for D. pectinatus (from 20% to 60% depending on the examined station). At two of the three stations examined in the Bay of Morbihan, the production of P. antarctica could potentially support the dietary requirements of planktivorous seabirds in the region (2,000 kg prey day)1 for common diving petrels, Pelecanoides urinatrix, and 90 kg prey day)1 for rockhopper penguins, Eudyptes chysocome filholi). 12 pages Article in Journal/Newspaper Antarc* Antarctica Kerguelen Islands Copepods Unknown Kerguelen Kerguelen Islands Marine Biology 142 3 525 536 |
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Open Polar |
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Unknown |
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fttriple |
language |
English |
topic |
envir geo |
spellingShingle |
envir geo Alonzo, F. Mayzaud, Patrick Razouls, Suzanne Bocher, Pierrick Cherel, Yves Seasonal changes in biomass, growth rates and production of subantarctic calanoid copepods in the Bay of Morbihan, Kerguelen Islands |
topic_facet |
envir geo |
description |
International audience The present study addresses the ecology of two dominant copepod species in the Bay of Morbihan, Kerguelen Archipelago. The biomass of the herbivore Drepanopus pectinatus (from 2 mg m)3 in winter up to 500 mg m)3 in summer) is tightly coupled to seasonal changes in chlorophyll a concentration in the region, whereas the biomass of the predatory euchaetiid Paraeuchaeta antarctica increases during two distinct periods over the year: 250 mg m)3 in early summer, with the recruitment of the annual generation, and 100 mg m)3 in autumn, with the deposition of lipids as energy reserves in C5 stages and adults. The juvenile growth rates predicted by temperature-dependent models (0.09 day)1) closely approximate those observed in D. pectinatusin summer, but are much greater than those observed in P. antarctica (from 0.001 to 0.04 day)1 depending on developmental stages). This difference can be explained by the reproductive strategies and trophic positions of the two species and may also result from the dependence of larval growth on energy reserves in P. antarctica. The production rates are five- and tenfold greater in juvenile stages than in adults, respectively, for D. pectinatus and P. antarctica. The secondary production by D. pectinatusis insufficient to support P. antarctica during winter, when the predatory species probably shifts to alternate prey. In summer the predation by P. antarctica accounts for only a minor part of the mortality estimated for D. pectinatus (from 20% to 60% depending on the examined station). At two of the three stations examined in the Bay of Morbihan, the production of P. antarctica could potentially support the dietary requirements of planktivorous seabirds in the region (2,000 kg prey day)1 for common diving petrels, Pelecanoides urinatrix, and 90 kg prey day)1 for rockhopper penguins, Eudyptes chysocome filholi). 12 pages |
author2 |
Laboratoire d'océanographie de Villefranche (LOV) Observatoire océanologique de Villefranche-sur-mer (OOVM) Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) Observatoire océanologique de Banyuls (OOB) Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) Centre de Recherche sur les Ecosystèmes Littoraux Anthropisés (CRELA) Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de La Rochelle (ULR)-Centre National de la Recherche Scientifique (CNRS) Centre d'études biologiques de Chizé (CEBC) Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Alonzo, F. Mayzaud, Patrick Razouls, Suzanne Bocher, Pierrick Cherel, Yves |
author_facet |
Alonzo, F. Mayzaud, Patrick Razouls, Suzanne Bocher, Pierrick Cherel, Yves |
author_sort |
Alonzo, F. |
title |
Seasonal changes in biomass, growth rates and production of subantarctic calanoid copepods in the Bay of Morbihan, Kerguelen Islands |
title_short |
Seasonal changes in biomass, growth rates and production of subantarctic calanoid copepods in the Bay of Morbihan, Kerguelen Islands |
title_full |
Seasonal changes in biomass, growth rates and production of subantarctic calanoid copepods in the Bay of Morbihan, Kerguelen Islands |
title_fullStr |
Seasonal changes in biomass, growth rates and production of subantarctic calanoid copepods in the Bay of Morbihan, Kerguelen Islands |
title_full_unstemmed |
Seasonal changes in biomass, growth rates and production of subantarctic calanoid copepods in the Bay of Morbihan, Kerguelen Islands |
title_sort |
seasonal changes in biomass, growth rates and production of subantarctic calanoid copepods in the bay of morbihan, kerguelen islands |
publisher |
HAL CCSD |
publishDate |
2003 |
url |
https://doi.org/10.1007/s00227-002-0976-5 https://hal.archives-ouvertes.fr/hal-00189197 |
geographic |
Kerguelen Kerguelen Islands |
geographic_facet |
Kerguelen Kerguelen Islands |
genre |
Antarc* Antarctica Kerguelen Islands Copepods |
genre_facet |
Antarc* Antarctica Kerguelen Islands Copepods |
op_source |
Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 0025-3162 EISSN: 1432-1793 Marine Biology Marine Biology, Springer Verlag, 2003, 142, pp.525-536. ⟨10.1007/s00227-002-0976-5⟩ |
op_relation |
hal-00189197 doi:10.1007/s00227-002-0976-5 10670/1.ldhz5k https://hal.archives-ouvertes.fr/hal-00189197 |
op_rights |
undefined |
op_doi |
https://doi.org/10.1007/s00227-002-0976-5 |
container_title |
Marine Biology |
container_volume |
142 |
container_issue |
3 |
container_start_page |
525 |
op_container_end_page |
536 |
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1766259373082935296 |