Ovarian development and spawning in relation to the moult cycle in Northern krill, Meganyctiphanes norvegica (Crustacea : Euphausiacea), along a climatic gradient
Adaptive processes linked to reproduction were studied comparatively for three populations of Northern krill, Meganyctiphanes norvegica (M. Sars, 1857), sampled during winter and summer cruises in the Clyde Sea (W Scotland), the Kattegat (E Denmark), and the Ligurian Sea (NW Mediterranean). The aim...
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1999
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Online Access: | https://hal.archives-ouvertes.fr/hal-03504553 https://doi.org/10.1007/s002270050466 |
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ftccsdartic:oai:HAL:hal-03504553v1 2023-05-15T17:10:42+02:00 Ovarian development and spawning in relation to the moult cycle in Northern krill, Meganyctiphanes norvegica (Crustacea : Euphausiacea), along a climatic gradient Cuzin-Roudy, J Buchholz, F Laboratoire d'océanographie de Villefranche (LOV) Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de la Mer de Villefranche (IMEV) Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) 1999 https://hal.archives-ouvertes.fr/hal-03504553 https://doi.org/10.1007/s002270050466 en eng HAL CCSD info:eu-repo/semantics/altIdentifier/doi/10.1007/s002270050466 hal-03504553 https://hal.archives-ouvertes.fr/hal-03504553 doi:10.1007/s002270050466 Marine Biology https://hal.archives-ouvertes.fr/hal-03504553 Marine Biology, 1999, 133 (2), pp.267-281. ⟨10.1007/s002270050466⟩ [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 1999 ftccsdartic https://doi.org/10.1007/s002270050466 2022-01-01T23:22:37Z Adaptive processes linked to reproduction were studied comparatively for three populations of Northern krill, Meganyctiphanes norvegica (M. Sars, 1857), sampled during winter and summer cruises in the Clyde Sea (W Scotland), the Kattegat (E Denmark), and the Ligurian Sea (NW Mediterranean). The aim was to investigate the functional relationship between egg production and moulting under contrasted climatic and environmental conditions. A staging system for female sexual development established for live krill was complemented by a histological study of the ovary at various developmental steps. During the reproductive season, all adult female krill were engaged in cyclical egg production. During experiments, female krill released one batch of mature oocytes in one or two spawning events. The ovary of postspawn female krill still contained developing oocytes for another egg batch. In the non-reproductive period, all female krill had a resting ovary. Ovarian structure and pattern of egg production were identical in the three populations, but seasonal timing of egg production was different. The model proposed for the Ligurian population of the annual cycle of ovarian development can be extended to the other two populations, taking into account the seasonal characteristics of each site. Random field samples were staged simultaneously for moult cycle and for sexual development. Moult stages and the seasonal variation of the intermoult period were studied for the Kattegat population using multi-year data and compared to data obtained during summer/winter cruises in the Clyde and the Ligurian Sea. At the three sites, intermoult period was shorter and temperature-dependent during the reproductive period, concurrent with the season of greatest food availability. During most of the year and the period of sexual rest, moulting activity was reduced. The relationship between spawning and the moult cycle was studied comparatively for the three populations. Eggs were released during the premoult phase of a ``spawning moult ... Article in Journal/Newspaper Meganyctiphanes norvegica Northern krill Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Kattegat ENVELOPE(9.692,9.692,63.563,63.563) Marine Biology 133 2 267 281 |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Cuzin-Roudy, J Buchholz, F Ovarian development and spawning in relation to the moult cycle in Northern krill, Meganyctiphanes norvegica (Crustacea : Euphausiacea), along a climatic gradient |
topic_facet |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
Adaptive processes linked to reproduction were studied comparatively for three populations of Northern krill, Meganyctiphanes norvegica (M. Sars, 1857), sampled during winter and summer cruises in the Clyde Sea (W Scotland), the Kattegat (E Denmark), and the Ligurian Sea (NW Mediterranean). The aim was to investigate the functional relationship between egg production and moulting under contrasted climatic and environmental conditions. A staging system for female sexual development established for live krill was complemented by a histological study of the ovary at various developmental steps. During the reproductive season, all adult female krill were engaged in cyclical egg production. During experiments, female krill released one batch of mature oocytes in one or two spawning events. The ovary of postspawn female krill still contained developing oocytes for another egg batch. In the non-reproductive period, all female krill had a resting ovary. Ovarian structure and pattern of egg production were identical in the three populations, but seasonal timing of egg production was different. The model proposed for the Ligurian population of the annual cycle of ovarian development can be extended to the other two populations, taking into account the seasonal characteristics of each site. Random field samples were staged simultaneously for moult cycle and for sexual development. Moult stages and the seasonal variation of the intermoult period were studied for the Kattegat population using multi-year data and compared to data obtained during summer/winter cruises in the Clyde and the Ligurian Sea. At the three sites, intermoult period was shorter and temperature-dependent during the reproductive period, concurrent with the season of greatest food availability. During most of the year and the period of sexual rest, moulting activity was reduced. The relationship between spawning and the moult cycle was studied comparatively for the three populations. Eggs were released during the premoult phase of a ``spawning moult ... |
author2 |
Laboratoire d'océanographie de Villefranche (LOV) Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de la Mer de Villefranche (IMEV) Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Cuzin-Roudy, J Buchholz, F |
author_facet |
Cuzin-Roudy, J Buchholz, F |
author_sort |
Cuzin-Roudy, J |
title |
Ovarian development and spawning in relation to the moult cycle in Northern krill, Meganyctiphanes norvegica (Crustacea : Euphausiacea), along a climatic gradient |
title_short |
Ovarian development and spawning in relation to the moult cycle in Northern krill, Meganyctiphanes norvegica (Crustacea : Euphausiacea), along a climatic gradient |
title_full |
Ovarian development and spawning in relation to the moult cycle in Northern krill, Meganyctiphanes norvegica (Crustacea : Euphausiacea), along a climatic gradient |
title_fullStr |
Ovarian development and spawning in relation to the moult cycle in Northern krill, Meganyctiphanes norvegica (Crustacea : Euphausiacea), along a climatic gradient |
title_full_unstemmed |
Ovarian development and spawning in relation to the moult cycle in Northern krill, Meganyctiphanes norvegica (Crustacea : Euphausiacea), along a climatic gradient |
title_sort |
ovarian development and spawning in relation to the moult cycle in northern krill, meganyctiphanes norvegica (crustacea : euphausiacea), along a climatic gradient |
publisher |
HAL CCSD |
publishDate |
1999 |
url |
https://hal.archives-ouvertes.fr/hal-03504553 https://doi.org/10.1007/s002270050466 |
long_lat |
ENVELOPE(9.692,9.692,63.563,63.563) |
geographic |
Kattegat |
geographic_facet |
Kattegat |
genre |
Meganyctiphanes norvegica Northern krill |
genre_facet |
Meganyctiphanes norvegica Northern krill |
op_source |
Marine Biology https://hal.archives-ouvertes.fr/hal-03504553 Marine Biology, 1999, 133 (2), pp.267-281. ⟨10.1007/s002270050466⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1007/s002270050466 hal-03504553 https://hal.archives-ouvertes.fr/hal-03504553 doi:10.1007/s002270050466 |
op_doi |
https://doi.org/10.1007/s002270050466 |
container_title |
Marine Biology |
container_volume |
133 |
container_issue |
2 |
container_start_page |
267 |
op_container_end_page |
281 |
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1766067345192648704 |