Reproductive patterns of the Pacific oyster Crassostrea gigas in France
International audience In France, national management programs focus research on understanding reproductive factors in Crassostrea gigas to confront problems of the oyster industry. However, little information has been documented in which reproductive patterns include sexual changes. The reproductiv...
Published in: | Invertebrate Reproduction & Development |
---|---|
Main Authors: | , , |
Other Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2006
|
Subjects: | |
Online Access: | https://hal.univ-brest.fr/hal-00663808 https://doi.org/10.1080/07924259.2006.9652192 |
id |
ftccsdartic:oai:HAL:hal-00663808v1 |
---|---|
record_format |
openpolar |
spelling |
ftccsdartic:oai:HAL:hal-00663808v1 2023-05-15T15:57:50+02:00 Reproductive patterns of the Pacific oyster Crassostrea gigas in France Lango-Reynoso, Fabiola Chavez-Villaba, Jorge Le Pennec, Marcel Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) 2006 https://hal.univ-brest.fr/hal-00663808 https://doi.org/10.1080/07924259.2006.9652192 en eng HAL CCSD Taylor & Francis info:eu-repo/semantics/altIdentifier/doi/10.1080/07924259.2006.9652192 hal-00663808 https://hal.univ-brest.fr/hal-00663808 doi:10.1080/07924259.2006.9652192 ISSN: 0792-4259 EISSN: 2157-0272 Invertebrate Reproduction and Development https://hal.univ-brest.fr/hal-00663808 Invertebrate Reproduction and Development, Taylor & Francis, 2006, 49 (1-2), pp.41-50. ⟨10.1080/07924259.2006.9652192⟩ Crassostrea gigas Pacific oyster reproduction oocyte size sex ratio modal analysis [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2006 ftccsdartic https://doi.org/10.1080/07924259.2006.9652192 2021-12-19T03:30:10Z International audience In France, national management programs focus research on understanding reproductive factors in Crassostrea gigas to confront problems of the oyster industry. However, little information has been documented in which reproductive patterns include sexual changes. The reproductive cycle of oysters at three sites of the Atlantic coast of France was examined from 1996 to 1998, and the seasonal variations in oocyte size-frequencies, and sex ratio were described. The results showed a synchronism within the population concerning reproductive behavior. Young oocytes are generated after spawning and show no apparent changes during winter. Growth of oocytes begins in spring and cells reach maturity in April-May and are ready for a single spawning season in June-July. Oocytes that were not released during spawning are reabsorbed within the gonad. The significant difference between sites is that spawning occurred 1 month later in the southern area. A modal analysis showed that oocyte populations in the sample individuals are primordially bimodal, but with polymodal occurrences in June-July, in some cases. Irregular alternative sexuality was detected at all sites, and hermaphrodites appear to be a transition phase that allows changes from male to female during early spring. Previous observations, together with the study of the development of oocyte cohorts over time, permit a hypothetical model concerning the kinetics of gametogenesis in C. gigas. The model suggests that primary oocytes are generated from energy supplied from degenerating, as well as young oocytes that do not reach the mature stage within the gonad during autumn-winter. It seems that, during vitellogenesis, there is disintegration of smaller cells coupled with transfer of energy to the larger oocytes, which continue to grow and mature. Article in Journal/Newspaper Crassostrea gigas Pacific oyster Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Pacific Invertebrate Reproduction & Development 49 1-2 41 50 |
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 |
Crassostrea gigas Pacific oyster reproduction oocyte size sex ratio modal analysis [SDE]Environmental Sciences |
spellingShingle |
Crassostrea gigas Pacific oyster reproduction oocyte size sex ratio modal analysis [SDE]Environmental Sciences Lango-Reynoso, Fabiola Chavez-Villaba, Jorge Le Pennec, Marcel Reproductive patterns of the Pacific oyster Crassostrea gigas in France |
topic_facet |
Crassostrea gigas Pacific oyster reproduction oocyte size sex ratio modal analysis [SDE]Environmental Sciences |
description |
International audience In France, national management programs focus research on understanding reproductive factors in Crassostrea gigas to confront problems of the oyster industry. However, little information has been documented in which reproductive patterns include sexual changes. The reproductive cycle of oysters at three sites of the Atlantic coast of France was examined from 1996 to 1998, and the seasonal variations in oocyte size-frequencies, and sex ratio were described. The results showed a synchronism within the population concerning reproductive behavior. Young oocytes are generated after spawning and show no apparent changes during winter. Growth of oocytes begins in spring and cells reach maturity in April-May and are ready for a single spawning season in June-July. Oocytes that were not released during spawning are reabsorbed within the gonad. The significant difference between sites is that spawning occurred 1 month later in the southern area. A modal analysis showed that oocyte populations in the sample individuals are primordially bimodal, but with polymodal occurrences in June-July, in some cases. Irregular alternative sexuality was detected at all sites, and hermaphrodites appear to be a transition phase that allows changes from male to female during early spring. Previous observations, together with the study of the development of oocyte cohorts over time, permit a hypothetical model concerning the kinetics of gametogenesis in C. gigas. The model suggests that primary oocytes are generated from energy supplied from degenerating, as well as young oocytes that do not reach the mature stage within the gonad during autumn-winter. It seems that, during vitellogenesis, there is disintegration of smaller cells coupled with transfer of energy to the larger oocytes, which continue to grow and mature. |
author2 |
Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Lango-Reynoso, Fabiola Chavez-Villaba, Jorge Le Pennec, Marcel |
author_facet |
Lango-Reynoso, Fabiola Chavez-Villaba, Jorge Le Pennec, Marcel |
author_sort |
Lango-Reynoso, Fabiola |
title |
Reproductive patterns of the Pacific oyster Crassostrea gigas in France |
title_short |
Reproductive patterns of the Pacific oyster Crassostrea gigas in France |
title_full |
Reproductive patterns of the Pacific oyster Crassostrea gigas in France |
title_fullStr |
Reproductive patterns of the Pacific oyster Crassostrea gigas in France |
title_full_unstemmed |
Reproductive patterns of the Pacific oyster Crassostrea gigas in France |
title_sort |
reproductive patterns of the pacific oyster crassostrea gigas in france |
publisher |
HAL CCSD |
publishDate |
2006 |
url |
https://hal.univ-brest.fr/hal-00663808 https://doi.org/10.1080/07924259.2006.9652192 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Crassostrea gigas Pacific oyster |
genre_facet |
Crassostrea gigas Pacific oyster |
op_source |
ISSN: 0792-4259 EISSN: 2157-0272 Invertebrate Reproduction and Development https://hal.univ-brest.fr/hal-00663808 Invertebrate Reproduction and Development, Taylor & Francis, 2006, 49 (1-2), pp.41-50. ⟨10.1080/07924259.2006.9652192⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1080/07924259.2006.9652192 hal-00663808 https://hal.univ-brest.fr/hal-00663808 doi:10.1080/07924259.2006.9652192 |
op_doi |
https://doi.org/10.1080/07924259.2006.9652192 |
container_title |
Invertebrate Reproduction & Development |
container_volume |
49 |
container_issue |
1-2 |
container_start_page |
41 |
op_container_end_page |
50 |
_version_ |
1766393537901887488 |