In situ spawning in a marine broadcast spawner, the Pacific oyster Crassostrea gigas: Timing and environmental triggers
The precise environmental conditions under which broadcast spawners spawn in the field remain largely unknown. We investigated this issue in the oyster Crassostrea gigas using three different methods at different time scales in two traditional oyster farming areas of the French Atlantic Coast, the B...
Published in: | Limnology and Oceanography |
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Language: | English |
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Association for the Sciences of Limnology and Oceanography
2016
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Online Access: | https://oskar-bordeaux.fr/handle/20.500.12278/199876 https://hdl.handle.net/20.500.12278/199876 https://doi.org/10.1002/lno.10240 |
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ftoskarbordeaux:oai:oskar-bordeaux.fr:20.500.12278/199876 2024-06-16T07:39:32+00:00 In situ spawning in a marine broadcast spawner, the Pacific oyster Crassostrea gigas: Timing and environmental triggers BERNARD, I. MASSABUAU, Jean-Charles CIRET, Pierre SOW, Moustapha SOTTOLICHIO, Aldo POUVREAU, Stéphane TRAN, Damien 2016-03 https://oskar-bordeaux.fr/handle/20.500.12278/199876 https://hdl.handle.net/20.500.12278/199876 https://doi.org/10.1002/lno.10240 en eng Association for the Sciences of Limnology and Oceanography 0024-3590 https://oskar-bordeaux.fr/handle/20.500.12278/199876 doi:10.1002/lno.10240 Pas de Licence CC TEMPERATURE ACL OSTREA VIRGINICA FERTILIZATION STRATEGIES SPERM LIMITATION PINCTADA-MARGARITIFERA SEXUAL CONFLICT GAMETE RELEASE SEA REPRODUCTION BIVALVE Sciences de l'environnement/Biodiversité et Ecologie Article de revue 2016 ftoskarbordeaux https://doi.org/20.500.12278/19987610.1002/lno.10240 2024-05-19T23:40:38Z The precise environmental conditions under which broadcast spawners spawn in the field remain largely unknown. We investigated this issue in the oyster Crassostrea gigas using three different methods at different time scales in two traditional oyster farming areas of the French Atlantic Coast, the Bay of Arcachon and Marennes-Oléron. We directly recorded spawning at high temporal resolution using high-frequency non-invasive (HFNI) valvometry from 2007–2014 and measured the dry mass and oyster larvae abundance in 2008 and 2009. We analyzed a 29-yr series of oyster D-larvae numbers in the Bay of Arcachon (1982–2010). By combining these three approaches, we demonstrated that during the summer months at both sites, spawning in C. gigas occurs in the morning or during the evening, essentially at high tide of perigean spring tides, independent of the positions of these oysters, above or below the lowest water level. We characterized the associated water currents at the spawning location in the Bay of Arcachon and observed that spawning systematically occurs during the early phase of a water current peak, at the beginning of ebbing. We propose that this water current peak acts as a final trigger for spawning. These results have ecological consequences associated with gamete encounters and the dispersal of fertilized eggs (zygotes). Article in Journal/Newspaper Crassostrea gigas Pacific oyster OSKAR Bordeaux (Open Science Knowledge ARchive) Pacific Limnology and Oceanography 61 2 635 647 |
institution |
Open Polar |
collection |
OSKAR Bordeaux (Open Science Knowledge ARchive) |
op_collection_id |
ftoskarbordeaux |
language |
English |
topic |
TEMPERATURE ACL OSTREA VIRGINICA FERTILIZATION STRATEGIES SPERM LIMITATION PINCTADA-MARGARITIFERA SEXUAL CONFLICT GAMETE RELEASE SEA REPRODUCTION BIVALVE Sciences de l'environnement/Biodiversité et Ecologie |
spellingShingle |
TEMPERATURE ACL OSTREA VIRGINICA FERTILIZATION STRATEGIES SPERM LIMITATION PINCTADA-MARGARITIFERA SEXUAL CONFLICT GAMETE RELEASE SEA REPRODUCTION BIVALVE Sciences de l'environnement/Biodiversité et Ecologie BERNARD, I. MASSABUAU, Jean-Charles CIRET, Pierre SOW, Moustapha SOTTOLICHIO, Aldo POUVREAU, Stéphane TRAN, Damien In situ spawning in a marine broadcast spawner, the Pacific oyster Crassostrea gigas: Timing and environmental triggers |
topic_facet |
TEMPERATURE ACL OSTREA VIRGINICA FERTILIZATION STRATEGIES SPERM LIMITATION PINCTADA-MARGARITIFERA SEXUAL CONFLICT GAMETE RELEASE SEA REPRODUCTION BIVALVE Sciences de l'environnement/Biodiversité et Ecologie |
description |
The precise environmental conditions under which broadcast spawners spawn in the field remain largely unknown. We investigated this issue in the oyster Crassostrea gigas using three different methods at different time scales in two traditional oyster farming areas of the French Atlantic Coast, the Bay of Arcachon and Marennes-Oléron. We directly recorded spawning at high temporal resolution using high-frequency non-invasive (HFNI) valvometry from 2007–2014 and measured the dry mass and oyster larvae abundance in 2008 and 2009. We analyzed a 29-yr series of oyster D-larvae numbers in the Bay of Arcachon (1982–2010). By combining these three approaches, we demonstrated that during the summer months at both sites, spawning in C. gigas occurs in the morning or during the evening, essentially at high tide of perigean spring tides, independent of the positions of these oysters, above or below the lowest water level. We characterized the associated water currents at the spawning location in the Bay of Arcachon and observed that spawning systematically occurs during the early phase of a water current peak, at the beginning of ebbing. We propose that this water current peak acts as a final trigger for spawning. These results have ecological consequences associated with gamete encounters and the dispersal of fertilized eggs (zygotes). |
format |
Article in Journal/Newspaper |
author |
BERNARD, I. MASSABUAU, Jean-Charles CIRET, Pierre SOW, Moustapha SOTTOLICHIO, Aldo POUVREAU, Stéphane TRAN, Damien |
author_facet |
BERNARD, I. MASSABUAU, Jean-Charles CIRET, Pierre SOW, Moustapha SOTTOLICHIO, Aldo POUVREAU, Stéphane TRAN, Damien |
author_sort |
BERNARD, I. |
title |
In situ spawning in a marine broadcast spawner, the Pacific oyster Crassostrea gigas: Timing and environmental triggers |
title_short |
In situ spawning in a marine broadcast spawner, the Pacific oyster Crassostrea gigas: Timing and environmental triggers |
title_full |
In situ spawning in a marine broadcast spawner, the Pacific oyster Crassostrea gigas: Timing and environmental triggers |
title_fullStr |
In situ spawning in a marine broadcast spawner, the Pacific oyster Crassostrea gigas: Timing and environmental triggers |
title_full_unstemmed |
In situ spawning in a marine broadcast spawner, the Pacific oyster Crassostrea gigas: Timing and environmental triggers |
title_sort |
in situ spawning in a marine broadcast spawner, the pacific oyster crassostrea gigas: timing and environmental triggers |
publisher |
Association for the Sciences of Limnology and Oceanography |
publishDate |
2016 |
url |
https://oskar-bordeaux.fr/handle/20.500.12278/199876 https://hdl.handle.net/20.500.12278/199876 https://doi.org/10.1002/lno.10240 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Crassostrea gigas Pacific oyster |
genre_facet |
Crassostrea gigas Pacific oyster |
op_relation |
0024-3590 https://oskar-bordeaux.fr/handle/20.500.12278/199876 doi:10.1002/lno.10240 |
op_rights |
Pas de Licence CC |
op_doi |
https://doi.org/20.500.12278/19987610.1002/lno.10240 |
container_title |
Limnology and Oceanography |
container_volume |
61 |
container_issue |
2 |
container_start_page |
635 |
op_container_end_page |
647 |
_version_ |
1802006281960030208 |