The scheduling of spawning with the moult cycle in Northern krill (Crustacea : Euphausiacea): a strategy for allocating lipids to reproduction
8th International Congress on Invertebrate Reproduction, AMSTERDAM, NETHERLANDS, AUG 10-14, 1998 Euphausiids moult and grow throughout their life, which implies sharing of resources between growth and reproduction for adult krill. In the Northern krill, Meganyctiphanes norvegica (M. Sars), female kr...
Published in: | Invertebrate Reproduction & Development |
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Online Access: | https://hal.archives-ouvertes.fr/hal-03504551 https://doi.org/10.1080/07924259.1999.9652694 |
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ftccsdartic:oai:HAL:hal-03504551v1 2023-05-15T17:10:42+02:00 The scheduling of spawning with the moult cycle in Northern krill (Crustacea : Euphausiacea): a strategy for allocating lipids to reproduction Cuzin-Roudy, J Albessard, E Virtue, P MAYZAUD, P 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) Station Zoologique de Villefranche Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) 1999 https://hal.archives-ouvertes.fr/hal-03504551 https://doi.org/10.1080/07924259.1999.9652694 en eng HAL CCSD info:eu-repo/semantics/altIdentifier/doi/10.1080/07924259.1999.9652694 hal-03504551 https://hal.archives-ouvertes.fr/hal-03504551 doi:10.1080/07924259.1999.9652694 INVERTEBRATE REPRODUCTION & DEVELOPMENT https://hal.archives-ouvertes.fr/hal-03504551 INVERTEBRATE REPRODUCTION & DEVELOPMENT, 1999, 36 (1-3), pp.163-170. ⟨10.1080/07924259.1999.9652694⟩ [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 1999 ftccsdartic https://doi.org/10.1080/07924259.1999.9652694 2022-01-01T23:22:37Z 8th International Congress on Invertebrate Reproduction, AMSTERDAM, NETHERLANDS, AUG 10-14, 1998 Euphausiids moult and grow throughout their life, which implies sharing of resources between growth and reproduction for adult krill. In the Northern krill, Meganyctiphanes norvegica (M. Sars), female krill produce eggs cyclically. Spawning moult cycles alternate with vitellogenic moult cycles for lipid yolk accumulation. Histology shows that lipids are associated with the R cells of the digestive gland in both sexes, with the yolk platelets of mature oocytes and with the fat body cell membranes and blood lacunae in reproducing females. Mature female krill can have a total lipid content twice as high as males, mostly due to accumulation in the ovary, the fat body and the haemolymph. In contrast, in males, as well as in non-reproducing females, the highest percentage of lipids is found in the digestive gland and the haemolymph. In Meganyctiphanes norvegica, the most abundant lipid fractions are polar lipids and triglycerides, the latter being relatively low in reproducing female gonad and fat body. Triglycerides are believed to be a pure energy source and polar lipids are essential for membrane development in embryos. The fatty acid content and composition of the triglyceride and polar lipid fractions in females are different from males, related to both reproductive and dietary processes. Higher levels of polyunsaturated fatty acids (PUFA) in the polar lipid fraction were found in reproductive females. During the non-reproductive season, the converse was found, indicating the specific role PUFA and other fatty acids play in growth and egg production. Adaptive processes linked to reproduction were studied comparatively in three populations of the Northern krill - Clyde Sea (W, Scotland), Kattegat (E, Denmark), Ligurian Sea (Mediterranean) - all differing considerably in climatic and trophic conditions. Such adjustments in lipid synthesis and storage are viewed as reproductive strategies developed by the Northern ... 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) Invertebrate Reproduction & Development 36 1-3 163 170 |
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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 Albessard, E Virtue, P MAYZAUD, P The scheduling of spawning with the moult cycle in Northern krill (Crustacea : Euphausiacea): a strategy for allocating lipids to reproduction |
topic_facet |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
8th International Congress on Invertebrate Reproduction, AMSTERDAM, NETHERLANDS, AUG 10-14, 1998 Euphausiids moult and grow throughout their life, which implies sharing of resources between growth and reproduction for adult krill. In the Northern krill, Meganyctiphanes norvegica (M. Sars), female krill produce eggs cyclically. Spawning moult cycles alternate with vitellogenic moult cycles for lipid yolk accumulation. Histology shows that lipids are associated with the R cells of the digestive gland in both sexes, with the yolk platelets of mature oocytes and with the fat body cell membranes and blood lacunae in reproducing females. Mature female krill can have a total lipid content twice as high as males, mostly due to accumulation in the ovary, the fat body and the haemolymph. In contrast, in males, as well as in non-reproducing females, the highest percentage of lipids is found in the digestive gland and the haemolymph. In Meganyctiphanes norvegica, the most abundant lipid fractions are polar lipids and triglycerides, the latter being relatively low in reproducing female gonad and fat body. Triglycerides are believed to be a pure energy source and polar lipids are essential for membrane development in embryos. The fatty acid content and composition of the triglyceride and polar lipid fractions in females are different from males, related to both reproductive and dietary processes. Higher levels of polyunsaturated fatty acids (PUFA) in the polar lipid fraction were found in reproductive females. During the non-reproductive season, the converse was found, indicating the specific role PUFA and other fatty acids play in growth and egg production. Adaptive processes linked to reproduction were studied comparatively in three populations of the Northern krill - Clyde Sea (W, Scotland), Kattegat (E, Denmark), Ligurian Sea (Mediterranean) - all differing considerably in climatic and trophic conditions. Such adjustments in lipid synthesis and storage are viewed as reproductive strategies developed by the Northern ... |
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) Station Zoologique de Villefranche Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Cuzin-Roudy, J Albessard, E Virtue, P MAYZAUD, P |
author_facet |
Cuzin-Roudy, J Albessard, E Virtue, P MAYZAUD, P |
author_sort |
Cuzin-Roudy, J |
title |
The scheduling of spawning with the moult cycle in Northern krill (Crustacea : Euphausiacea): a strategy for allocating lipids to reproduction |
title_short |
The scheduling of spawning with the moult cycle in Northern krill (Crustacea : Euphausiacea): a strategy for allocating lipids to reproduction |
title_full |
The scheduling of spawning with the moult cycle in Northern krill (Crustacea : Euphausiacea): a strategy for allocating lipids to reproduction |
title_fullStr |
The scheduling of spawning with the moult cycle in Northern krill (Crustacea : Euphausiacea): a strategy for allocating lipids to reproduction |
title_full_unstemmed |
The scheduling of spawning with the moult cycle in Northern krill (Crustacea : Euphausiacea): a strategy for allocating lipids to reproduction |
title_sort |
scheduling of spawning with the moult cycle in northern krill (crustacea : euphausiacea): a strategy for allocating lipids to reproduction |
publisher |
HAL CCSD |
publishDate |
1999 |
url |
https://hal.archives-ouvertes.fr/hal-03504551 https://doi.org/10.1080/07924259.1999.9652694 |
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 |
INVERTEBRATE REPRODUCTION & DEVELOPMENT https://hal.archives-ouvertes.fr/hal-03504551 INVERTEBRATE REPRODUCTION & DEVELOPMENT, 1999, 36 (1-3), pp.163-170. ⟨10.1080/07924259.1999.9652694⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1080/07924259.1999.9652694 hal-03504551 https://hal.archives-ouvertes.fr/hal-03504551 doi:10.1080/07924259.1999.9652694 |
op_doi |
https://doi.org/10.1080/07924259.1999.9652694 |
container_title |
Invertebrate Reproduction & Development |
container_volume |
36 |
container_issue |
1-3 |
container_start_page |
163 |
op_container_end_page |
170 |
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