Life cycle strategies of Northern krill (Meganyctiphanes norvegica) for regulating growth, moult, and reproductive activity in various environments: the case of fjordic populations
3rd International Zooplankton Production Symposium, Gijon, SPAIN, MAY 20-23, 2003 Adaptive strategies of two fjord populations of Northern krill (Meganyctiphanes norvegica Sars) were studied and compared with other populations from different climatic and oceanic conditions. The Gullmarsfjord (West S...
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ftinsu:oai:HAL:hal-03506674v1 2024-02-11T10:05:44+01:00 Life cycle strategies of Northern krill (Meganyctiphanes norvegica) for regulating growth, moult, and reproductive activity in various environments: the case of fjordic populations Cuzin-Roudy, J Tarling, Ga Stromberg, Jo Laboratoire d'océanographie de Villefranche (LOV) Observatoire océanologique de Villefranche-sur-mer (OOVM) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) 2004 https://hal.science/hal-03506674 https://doi.org/10.1016/j.icesjms.2004.03.008 en eng HAL CCSD info:eu-repo/semantics/altIdentifier/doi/10.1016/j.icesjms.2004.03.008 hal-03506674 https://hal.science/hal-03506674 doi:10.1016/j.icesjms.2004.03.008 ICES JOURNAL OF MARINE SCIENCE https://hal.science/hal-03506674 ICES JOURNAL OF MARINE SCIENCE, 2004, 61 (4), pp.721-737. ⟨10.1016/j.icesjms.2004.03.008⟩ [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2004 ftinsu https://doi.org/10.1016/j.icesjms.2004.03.008 2024-01-24T17:30:17Z 3rd International Zooplankton Production Symposium, Gijon, SPAIN, MAY 20-23, 2003 Adaptive strategies of two fjord populations of Northern krill (Meganyctiphanes norvegica Sars) were studied and compared with other populations from different climatic and oceanic conditions. The Gullmarsfjord (West Sweden) and the Clyde Sea (West Scotland) resident populations followed the same basic pattern of development as the Kattegat (between Denmark and Sweden) and the Ligurian Sea (Northwest Mediterranean) populations, but the fjord krill reached a comparatively larger body size during their second year of life. The positive relationship between body size and fecundity means that fjord populations are potentially more productive than those of the open sea. High rates of moulting and spawning activity were limited to the spring and summer despite the fact that trophic conditions still seemed favourable in early autumn. We show here that, in autumn, the adult moult cycle became longer and growth stopped, large 2-year-old krill disappeared from the population and ovarian development was arrested. Resources already accumulated ill the oocytes (glycoproteic and lipid yolk) were recovered by oosorption and ovaries regressed for a winter rest. Autumn trophic conditions were still favourable in both sites, especially in terms of copepod abundance. However, the phytoplankton community changed from a dominance of diatoms in early season to dinoflagellates in late summer. We suggest that these changes triggered the autumn arrest of krill production. (C) 2004 International Council for the Exploration of the Sea. Published by Elsevier Ltd. All rights reserved. Article in Journal/Newspaper Meganyctiphanes norvegica Northern krill Institut national des sciences de l'Univers: HAL-INSU Kattegat ENVELOPE(9.692,9.692,63.563,63.563) ICES Journal of Marine Science 61 4 721 737 |
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Open Polar |
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Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
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 Tarling, Ga Stromberg, Jo Life cycle strategies of Northern krill (Meganyctiphanes norvegica) for regulating growth, moult, and reproductive activity in various environments: the case of fjordic populations |
topic_facet |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
3rd International Zooplankton Production Symposium, Gijon, SPAIN, MAY 20-23, 2003 Adaptive strategies of two fjord populations of Northern krill (Meganyctiphanes norvegica Sars) were studied and compared with other populations from different climatic and oceanic conditions. The Gullmarsfjord (West Sweden) and the Clyde Sea (West Scotland) resident populations followed the same basic pattern of development as the Kattegat (between Denmark and Sweden) and the Ligurian Sea (Northwest Mediterranean) populations, but the fjord krill reached a comparatively larger body size during their second year of life. The positive relationship between body size and fecundity means that fjord populations are potentially more productive than those of the open sea. High rates of moulting and spawning activity were limited to the spring and summer despite the fact that trophic conditions still seemed favourable in early autumn. We show here that, in autumn, the adult moult cycle became longer and growth stopped, large 2-year-old krill disappeared from the population and ovarian development was arrested. Resources already accumulated ill the oocytes (glycoproteic and lipid yolk) were recovered by oosorption and ovaries regressed for a winter rest. Autumn trophic conditions were still favourable in both sites, especially in terms of copepod abundance. However, the phytoplankton community changed from a dominance of diatoms in early season to dinoflagellates in late summer. We suggest that these changes triggered the autumn arrest of krill production. (C) 2004 International Council for the Exploration of the Sea. Published by Elsevier Ltd. All rights reserved. |
author2 |
Laboratoire d'océanographie de Villefranche (LOV) Observatoire océanologique de Villefranche-sur-mer (OOVM) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Cuzin-Roudy, J Tarling, Ga Stromberg, Jo |
author_facet |
Cuzin-Roudy, J Tarling, Ga Stromberg, Jo |
author_sort |
Cuzin-Roudy, J |
title |
Life cycle strategies of Northern krill (Meganyctiphanes norvegica) for regulating growth, moult, and reproductive activity in various environments: the case of fjordic populations |
title_short |
Life cycle strategies of Northern krill (Meganyctiphanes norvegica) for regulating growth, moult, and reproductive activity in various environments: the case of fjordic populations |
title_full |
Life cycle strategies of Northern krill (Meganyctiphanes norvegica) for regulating growth, moult, and reproductive activity in various environments: the case of fjordic populations |
title_fullStr |
Life cycle strategies of Northern krill (Meganyctiphanes norvegica) for regulating growth, moult, and reproductive activity in various environments: the case of fjordic populations |
title_full_unstemmed |
Life cycle strategies of Northern krill (Meganyctiphanes norvegica) for regulating growth, moult, and reproductive activity in various environments: the case of fjordic populations |
title_sort |
life cycle strategies of northern krill (meganyctiphanes norvegica) for regulating growth, moult, and reproductive activity in various environments: the case of fjordic populations |
publisher |
HAL CCSD |
publishDate |
2004 |
url |
https://hal.science/hal-03506674 https://doi.org/10.1016/j.icesjms.2004.03.008 |
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 |
ICES JOURNAL OF MARINE SCIENCE https://hal.science/hal-03506674 ICES JOURNAL OF MARINE SCIENCE, 2004, 61 (4), pp.721-737. ⟨10.1016/j.icesjms.2004.03.008⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.icesjms.2004.03.008 hal-03506674 https://hal.science/hal-03506674 doi:10.1016/j.icesjms.2004.03.008 |
op_doi |
https://doi.org/10.1016/j.icesjms.2004.03.008 |
container_title |
ICES Journal of Marine Science |
container_volume |
61 |
container_issue |
4 |
container_start_page |
721 |
op_container_end_page |
737 |
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1790602895322775552 |