REPRODUCTION IN NORTHERN KRILL (MEGANYCTIPHANES NORVEGICA SARS)
International audience This review presents the current state of knowledge with regard to the reproductive biology of Northern krill (Meganyctiphanes norvegica) Reproduction is limited to a distinct period of the year First development of the ovary occurs at the onset of the season when the stock of...
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ftccsdartic:oai:HAL:hal-03502077v1 2023-05-15T17:10:42+02:00 REPRODUCTION IN NORTHERN KRILL (MEGANYCTIPHANES NORVEGICA SARS) Roudy, Janine Cuzin 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) Tarling, GA 2010 https://hal.archives-ouvertes.fr/hal-03502077 https://doi.org/10.1016/S0065-2881(10)57007-X en eng HAL CCSD info:eu-repo/semantics/altIdentifier/doi/10.1016/S0065-2881(10)57007-X ISBN: 978-0-12-381308-4 hal-03502077 https://hal.archives-ouvertes.fr/hal-03502077 doi:10.1016/S0065-2881(10)57007-X ADVANCES IN MARINE BIOLOGY, VOL 57 https://hal.archives-ouvertes.fr/hal-03502077 Tarling, GA. ADVANCES IN MARINE BIOLOGY, VOL 57, 57, pp.199-230, 2010, Advances in Marine Biology, 978-0-12-381308-4. ⟨10.1016/S0065-2881(10)57007-X⟩ [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/bookPart Book sections 2010 ftccsdartic https://doi.org/10.1016/S0065-2881(10)57007-X 2022-01-01T23:24:51Z International audience This review presents the current state of knowledge with regard to the reproductive biology of Northern krill (Meganyctiphanes norvegica) Reproduction is limited to a distinct period of the year First development of the ovary occurs at the onset of the season when the stock of primary oocytes issued from the germinal zone starts to accumulate glycoproteic yolk Previtellogenesis continues through out the entire reproductive season but oosorption (the retrieval by the ovary of the yolk constituents from the growing oocytes) may occur in unfavourable conditions and represents an important metabolic process for sustaining females during such periods Oosorption also occurs at the onset of the resting season It has been established that individual females may perform several cycles of reproduction each year Each reproductive cycle spans two moult cycles one in which lipid yolk is accumulated (vitellogenesis) and another when spawning occurs The time of spawning does not coincide with the moult (ecdysis) but with the onset of moult preparation (C Do moult stages) The complete egg batch is spawned well before the moult Storage lipids are accumulated preferentially in the ovary with distinctly high levels of omega 3 polyunsaturated fatty acids in the polar lipid fraction as well as phosphatidylcholine a key component in the development of the embryo There is no difference concerning lipid storage between resting females males and Juvenile krill Beside the ovary the fat body is an important organ involved in the metabolism and storage of the glycoproteins and lipids that will be transformed into the lipoglycoproteins of the yolk platelets in the ovary M norvegica produce large egg batches with the number of mature oocytes in one batch being proportional to the size of the female with a mean number of 1000-1200 eggs per batch The number of reproductive cycles per year is a function of the trophic conditions with the first reproductive cycle being triggered by the first phytoplankton bloom Other ... Book Part Meganyctiphanes norvegica Northern krill Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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 Roudy, Janine Cuzin REPRODUCTION IN NORTHERN KRILL (MEGANYCTIPHANES NORVEGICA SARS) |
topic_facet |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience This review presents the current state of knowledge with regard to the reproductive biology of Northern krill (Meganyctiphanes norvegica) Reproduction is limited to a distinct period of the year First development of the ovary occurs at the onset of the season when the stock of primary oocytes issued from the germinal zone starts to accumulate glycoproteic yolk Previtellogenesis continues through out the entire reproductive season but oosorption (the retrieval by the ovary of the yolk constituents from the growing oocytes) may occur in unfavourable conditions and represents an important metabolic process for sustaining females during such periods Oosorption also occurs at the onset of the resting season It has been established that individual females may perform several cycles of reproduction each year Each reproductive cycle spans two moult cycles one in which lipid yolk is accumulated (vitellogenesis) and another when spawning occurs The time of spawning does not coincide with the moult (ecdysis) but with the onset of moult preparation (C Do moult stages) The complete egg batch is spawned well before the moult Storage lipids are accumulated preferentially in the ovary with distinctly high levels of omega 3 polyunsaturated fatty acids in the polar lipid fraction as well as phosphatidylcholine a key component in the development of the embryo There is no difference concerning lipid storage between resting females males and Juvenile krill Beside the ovary the fat body is an important organ involved in the metabolism and storage of the glycoproteins and lipids that will be transformed into the lipoglycoproteins of the yolk platelets in the ovary M norvegica produce large egg batches with the number of mature oocytes in one batch being proportional to the size of the female with a mean number of 1000-1200 eggs per batch The number of reproductive cycles per year is a function of the trophic conditions with the first reproductive cycle being triggered by the first phytoplankton bloom Other ... |
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) Tarling, GA |
format |
Book Part |
author |
Roudy, Janine Cuzin |
author_facet |
Roudy, Janine Cuzin |
author_sort |
Roudy, Janine Cuzin |
title |
REPRODUCTION IN NORTHERN KRILL (MEGANYCTIPHANES NORVEGICA SARS) |
title_short |
REPRODUCTION IN NORTHERN KRILL (MEGANYCTIPHANES NORVEGICA SARS) |
title_full |
REPRODUCTION IN NORTHERN KRILL (MEGANYCTIPHANES NORVEGICA SARS) |
title_fullStr |
REPRODUCTION IN NORTHERN KRILL (MEGANYCTIPHANES NORVEGICA SARS) |
title_full_unstemmed |
REPRODUCTION IN NORTHERN KRILL (MEGANYCTIPHANES NORVEGICA SARS) |
title_sort |
reproduction in northern krill (meganyctiphanes norvegica sars) |
publisher |
HAL CCSD |
publishDate |
2010 |
url |
https://hal.archives-ouvertes.fr/hal-03502077 https://doi.org/10.1016/S0065-2881(10)57007-X |
genre |
Meganyctiphanes norvegica Northern krill |
genre_facet |
Meganyctiphanes norvegica Northern krill |
op_source |
ADVANCES IN MARINE BIOLOGY, VOL 57 https://hal.archives-ouvertes.fr/hal-03502077 Tarling, GA. ADVANCES IN MARINE BIOLOGY, VOL 57, 57, pp.199-230, 2010, Advances in Marine Biology, 978-0-12-381308-4. ⟨10.1016/S0065-2881(10)57007-X⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/S0065-2881(10)57007-X ISBN: 978-0-12-381308-4 hal-03502077 https://hal.archives-ouvertes.fr/hal-03502077 doi:10.1016/S0065-2881(10)57007-X |
op_doi |
https://doi.org/10.1016/S0065-2881(10)57007-X |
_version_ |
1766067345532387328 |