Gametogenesis, reproductive investment, and spawning behavior of the Pacific giant oyster Crassostrea gigas: evidence of an environment-dependent strategy
The progress of gametogenesis was studied in oysters Crassostrea gigas having the same origin (Tremblade), but cultured during 1 year in two distinctive French marine areas, the Baie des Veys and Marennes-Ol,ron. We assessed seasonal changes in the reproduction cycle on the basis of stereological te...
Published in: | Aquaculture International |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Springer
2009
|
Subjects: | |
Online Access: | https://archimer.ifremer.fr/doc/2009/publication-7300.pdf https://doi.org/10.1007/s10499-008-9219-1 https://archimer.ifremer.fr/doc/00000/7300/ |
id |
ftarchimer:oai:archimer.ifremer.fr:7300 |
---|---|
record_format |
openpolar |
spelling |
ftarchimer:oai:archimer.ifremer.fr:7300 2023-05-15T15:57:50+02:00 Gametogenesis, reproductive investment, and spawning behavior of the Pacific giant oyster Crassostrea gigas: evidence of an environment-dependent strategy Enriquez-diaz, M. Pouvreau, Stephane Chavez-villalba, J. Le Pennec, M. 2009-10 application/pdf https://archimer.ifremer.fr/doc/2009/publication-7300.pdf https://doi.org/10.1007/s10499-008-9219-1 https://archimer.ifremer.fr/doc/00000/7300/ eng eng Springer https://archimer.ifremer.fr/doc/2009/publication-7300.pdf doi:10.1007/s10499-008-9219-1 https://archimer.ifremer.fr/doc/00000/7300/ 2009 Springer. Part of Springer Science+Business Media info:eu-repo/semantics/openAccess restricted use Aquaculture International (0967-6120) (Springer), 2009-10 , Vol. 17 , N. 5 , P. 491-506 Stereology Reproductive investment Pacific oysters Image analysis Gametogenesis Crassostrea gigas text Publication info:eu-repo/semantics/article 2009 ftarchimer https://doi.org/10.1007/s10499-008-9219-1 2021-09-23T20:17:51Z The progress of gametogenesis was studied in oysters Crassostrea gigas having the same origin (Tremblade), but cultured during 1 year in two distinctive French marine areas, the Baie des Veys and Marennes-Ol,ron. We assessed seasonal changes in the reproduction cycle on the basis of stereological techniques to estimate reproductive investment and measurement of gonad evolution area by quantitative histology. From a qualitative point of view, both oyster groups presented typical reproductive stages, but showed differential timing, in particular during the sequence of spawning and duration of the re-absorption stage. Oysters in Baie des Veys had a single partial spawning in August and a re-absorption stage that extended until winter. Oysters in Merennes-Ol,ron had a partial spawning in July and massive release of gametes during August. Spawnings in both the areas were related to maximum temperature (19A degrees C). The quantitative analysis showed, on an annual basis, a higher reproductive investment by oysters from Baie des Veys, 86% against 53% in the other group. Larger gonads, higher gamete production, and more intensive spawning were the characteristics of oysters in Baie des Veys. Recently, the reproduction pattern and investment has been related with summer mortalities; therefore, a quantitative understanding of reproductive processes becomes necessary for C. gigas. Environmental conditions at each site may explain differences in the progress and intensity of gametogenesis. While temperature regulated the time and speed of gametogenesis, results suggest that the intensity was influenced by the quantity of available food but may need further research. However, nutrient recycling from unreleased gametes in the gonads of oysters from Baie des Vey is a factor to be considered in the results of this study. Article in Journal/Newspaper Crassostrea gigas Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Pacific Aquaculture International 17 5 491 506 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
topic |
Stereology Reproductive investment Pacific oysters Image analysis Gametogenesis Crassostrea gigas |
spellingShingle |
Stereology Reproductive investment Pacific oysters Image analysis Gametogenesis Crassostrea gigas Enriquez-diaz, M. Pouvreau, Stephane Chavez-villalba, J. Le Pennec, M. Gametogenesis, reproductive investment, and spawning behavior of the Pacific giant oyster Crassostrea gigas: evidence of an environment-dependent strategy |
topic_facet |
Stereology Reproductive investment Pacific oysters Image analysis Gametogenesis Crassostrea gigas |
description |
The progress of gametogenesis was studied in oysters Crassostrea gigas having the same origin (Tremblade), but cultured during 1 year in two distinctive French marine areas, the Baie des Veys and Marennes-Ol,ron. We assessed seasonal changes in the reproduction cycle on the basis of stereological techniques to estimate reproductive investment and measurement of gonad evolution area by quantitative histology. From a qualitative point of view, both oyster groups presented typical reproductive stages, but showed differential timing, in particular during the sequence of spawning and duration of the re-absorption stage. Oysters in Baie des Veys had a single partial spawning in August and a re-absorption stage that extended until winter. Oysters in Merennes-Ol,ron had a partial spawning in July and massive release of gametes during August. Spawnings in both the areas were related to maximum temperature (19A degrees C). The quantitative analysis showed, on an annual basis, a higher reproductive investment by oysters from Baie des Veys, 86% against 53% in the other group. Larger gonads, higher gamete production, and more intensive spawning were the characteristics of oysters in Baie des Veys. Recently, the reproduction pattern and investment has been related with summer mortalities; therefore, a quantitative understanding of reproductive processes becomes necessary for C. gigas. Environmental conditions at each site may explain differences in the progress and intensity of gametogenesis. While temperature regulated the time and speed of gametogenesis, results suggest that the intensity was influenced by the quantity of available food but may need further research. However, nutrient recycling from unreleased gametes in the gonads of oysters from Baie des Vey is a factor to be considered in the results of this study. |
format |
Article in Journal/Newspaper |
author |
Enriquez-diaz, M. Pouvreau, Stephane Chavez-villalba, J. Le Pennec, M. |
author_facet |
Enriquez-diaz, M. Pouvreau, Stephane Chavez-villalba, J. Le Pennec, M. |
author_sort |
Enriquez-diaz, M. |
title |
Gametogenesis, reproductive investment, and spawning behavior of the Pacific giant oyster Crassostrea gigas: evidence of an environment-dependent strategy |
title_short |
Gametogenesis, reproductive investment, and spawning behavior of the Pacific giant oyster Crassostrea gigas: evidence of an environment-dependent strategy |
title_full |
Gametogenesis, reproductive investment, and spawning behavior of the Pacific giant oyster Crassostrea gigas: evidence of an environment-dependent strategy |
title_fullStr |
Gametogenesis, reproductive investment, and spawning behavior of the Pacific giant oyster Crassostrea gigas: evidence of an environment-dependent strategy |
title_full_unstemmed |
Gametogenesis, reproductive investment, and spawning behavior of the Pacific giant oyster Crassostrea gigas: evidence of an environment-dependent strategy |
title_sort |
gametogenesis, reproductive investment, and spawning behavior of the pacific giant oyster crassostrea gigas: evidence of an environment-dependent strategy |
publisher |
Springer |
publishDate |
2009 |
url |
https://archimer.ifremer.fr/doc/2009/publication-7300.pdf https://doi.org/10.1007/s10499-008-9219-1 https://archimer.ifremer.fr/doc/00000/7300/ |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Crassostrea gigas |
genre_facet |
Crassostrea gigas |
op_source |
Aquaculture International (0967-6120) (Springer), 2009-10 , Vol. 17 , N. 5 , P. 491-506 |
op_relation |
https://archimer.ifremer.fr/doc/2009/publication-7300.pdf doi:10.1007/s10499-008-9219-1 https://archimer.ifremer.fr/doc/00000/7300/ |
op_rights |
2009 Springer. Part of Springer Science+Business Media info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1007/s10499-008-9219-1 |
container_title |
Aquaculture International |
container_volume |
17 |
container_issue |
5 |
container_start_page |
491 |
op_container_end_page |
506 |
_version_ |
1766393533497868288 |