Egg production, population structure and biochemical composition of the subantarctic copepod Paraeuchaeta antarctica in the Kerguelen Archipelago
International audience The population structure and reproductive biology of the predatory calanoid copepod Paraeuchaeta antarctica (Giesbrecht, 1902) were investigated in the Kerguelen Archipelago over 1 yr. The seasonal frequencies of the various developmental and adult stages showed that the popul...
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ftsorbonneuniv:oai:HAL:hal-03483097v1 2024-09-15T17:47:02+00:00 Egg production, population structure and biochemical composition of the subantarctic copepod Paraeuchaeta antarctica in the Kerguelen Archipelago Alonzo, F Mayzaud, P Razouls, S Station Zoologique de Villefranche Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) Observatoire océanologique de Banyuls (OOB) Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) 2000 https://hal.science/hal-03483097 https://doi.org/10.3354/meps205207 en eng HAL CCSD Inter Research info:eu-repo/semantics/altIdentifier/doi/10.3354/meps205207 hal-03483097 https://hal.science/hal-03483097 doi:10.3354/meps205207 ISSN: 0171-8630 EISSN: 1616-1599 Marine Ecology Progress Series https://hal.science/hal-03483097 Marine Ecology Progress Series, 2000, 205, pp.207-217. ⟨10.3354/meps205207⟩ [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2000 ftsorbonneuniv https://doi.org/10.3354/meps205207 2024-07-25T23:47:52Z International audience The population structure and reproductive biology of the predatory calanoid copepod Paraeuchaeta antarctica (Giesbrecht, 1902) were investigated in the Kerguelen Archipelago over 1 yr. The seasonal frequencies of the various developmental and adult stages showed that the population produces 1 generation per year, with recruitment taking place during the austral spring. Occurrence of females with spermatophores indicated that mating occurred in winter. Counts of egg-bearing females and of number of eggs per sac confirmed that the peak of reproduction was from winter to late spring. Seasonal variations in body dry weight, lipid and protein contents of the various developmental and adult stages reflected changes in food availability and the reproduction cycle. P. antarctica increased lipid and protein content during spring and summer when prey organisms were abundant. The subsequent loss in winter was associated with the production of eggs. A study of lipid classes showed that lipid accumulations were essentially composed of wax esters, which permitted production of eggs when food conditions were unfavorable. The population dynamics and reproductive biology of P. antarctica from Kerguelen are discussed in comparison with the antarctic populations described at South Georgia and off the Antarctic Peninsula, as well as with the northern euchaetiid Euchaeta norvegica. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica HAL Sorbonne Université Marine Ecology Progress Series 205 207 217 |
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HAL Sorbonne Université |
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ftsorbonneuniv |
language |
English |
topic |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
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[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Alonzo, F Mayzaud, P Razouls, S Egg production, population structure and biochemical composition of the subantarctic copepod Paraeuchaeta antarctica in the Kerguelen Archipelago |
topic_facet |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience The population structure and reproductive biology of the predatory calanoid copepod Paraeuchaeta antarctica (Giesbrecht, 1902) were investigated in the Kerguelen Archipelago over 1 yr. The seasonal frequencies of the various developmental and adult stages showed that the population produces 1 generation per year, with recruitment taking place during the austral spring. Occurrence of females with spermatophores indicated that mating occurred in winter. Counts of egg-bearing females and of number of eggs per sac confirmed that the peak of reproduction was from winter to late spring. Seasonal variations in body dry weight, lipid and protein contents of the various developmental and adult stages reflected changes in food availability and the reproduction cycle. P. antarctica increased lipid and protein content during spring and summer when prey organisms were abundant. The subsequent loss in winter was associated with the production of eggs. A study of lipid classes showed that lipid accumulations were essentially composed of wax esters, which permitted production of eggs when food conditions were unfavorable. The population dynamics and reproductive biology of P. antarctica from Kerguelen are discussed in comparison with the antarctic populations described at South Georgia and off the Antarctic Peninsula, as well as with the northern euchaetiid Euchaeta norvegica. |
author2 |
Station Zoologique de Villefranche Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) Observatoire océanologique de Banyuls (OOB) Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Alonzo, F Mayzaud, P Razouls, S |
author_facet |
Alonzo, F Mayzaud, P Razouls, S |
author_sort |
Alonzo, F |
title |
Egg production, population structure and biochemical composition of the subantarctic copepod Paraeuchaeta antarctica in the Kerguelen Archipelago |
title_short |
Egg production, population structure and biochemical composition of the subantarctic copepod Paraeuchaeta antarctica in the Kerguelen Archipelago |
title_full |
Egg production, population structure and biochemical composition of the subantarctic copepod Paraeuchaeta antarctica in the Kerguelen Archipelago |
title_fullStr |
Egg production, population structure and biochemical composition of the subantarctic copepod Paraeuchaeta antarctica in the Kerguelen Archipelago |
title_full_unstemmed |
Egg production, population structure and biochemical composition of the subantarctic copepod Paraeuchaeta antarctica in the Kerguelen Archipelago |
title_sort |
egg production, population structure and biochemical composition of the subantarctic copepod paraeuchaeta antarctica in the kerguelen archipelago |
publisher |
HAL CCSD |
publishDate |
2000 |
url |
https://hal.science/hal-03483097 https://doi.org/10.3354/meps205207 |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica |
op_source |
ISSN: 0171-8630 EISSN: 1616-1599 Marine Ecology Progress Series https://hal.science/hal-03483097 Marine Ecology Progress Series, 2000, 205, pp.207-217. ⟨10.3354/meps205207⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.3354/meps205207 hal-03483097 https://hal.science/hal-03483097 doi:10.3354/meps205207 |
op_doi |
https://doi.org/10.3354/meps205207 |
container_title |
Marine Ecology Progress Series |
container_volume |
205 |
container_start_page |
207 |
op_container_end_page |
217 |
_version_ |
1810495527604715520 |