Feeding rate of the oyster Crassostrea gigas in a natural planktonic community of the Mediterranean Thau Lagoon
International audience The Mediterranean Thau Lagoon is an important European oyster farming area. Oyster growth levels are among the highest in France, although chlorophyll a concentration is low. Previous studies have demonstrated that picophytoplankton, nano-microphytoplankton, dinoflagellates an...
Published in: | Marine Ecology Progress Series |
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Main Authors: | , , , , , , , |
Other Authors: | , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2000
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Subjects: | |
Online Access: | https://hal.science/hal-01248028 https://hal.science/hal-01248028/document https://hal.science/hal-01248028/file/dupuy%20et%20al%202000b.pdf https://doi.org/10.3354/meps205171 |
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ftinsu:oai:HAL:hal-01248028v1 |
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openpolar |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
Key-words Bivalve oyster food source Thau Lagoon microbial food web heterotrophic protist picophytoplankton trophic link [SDV]Life Sciences [q-bio] |
spellingShingle |
Key-words Bivalve oyster food source Thau Lagoon microbial food web heterotrophic protist picophytoplankton trophic link [SDV]Life Sciences [q-bio] Dupuy, Christine Vaquer, André Lam-Höai, Thong Rougier, Claude Gaertner-Mazouni, Nabila Lautier, Jacques Collos, Yves Le Gall, Solange Feeding rate of the oyster Crassostrea gigas in a natural planktonic community of the Mediterranean Thau Lagoon |
topic_facet |
Key-words Bivalve oyster food source Thau Lagoon microbial food web heterotrophic protist picophytoplankton trophic link [SDV]Life Sciences [q-bio] |
description |
International audience The Mediterranean Thau Lagoon is an important European oyster farming area. Oyster growth levels are among the highest in France, although chlorophyll a concentration is low. Previous studies have demonstrated that picophytoplankton, nano-microphytoplankton, dinoflagellates and loricate ciliates such as tintinnids are abundant in the Thau Lagoon. Moreover, heterotrophic flagellates and aloricate ciliates have not been investigated. The aim of this study was to assess picophytoplankton, protist and zooplankton abundances in water columns of the Thau Lagoon and to understand the particular structure of the Thau microbial food web, which may explain such a paradoxical oyster growth. In oligotrophic waters in the Thau Lagoon, the picoeukaryote Ostreococcus tauri is the dominant autotrophic picoplankter with a maximum Summer abundance. On 17 August 1998, the picophytoplankton and nanophytoplankton abundances were not as high as expected and we observed the development of large diatoms. At this time, available carbon resources arose from microphytoplankton (84.5 %) and picoplanktonic cells represented only 1.27 % in terms of carbon. The heterotrophic cells were few in abundance and constitued only < 14 % of carbon resources. In order to evaluate the importance of the "protozoan trophic link" for energy transfer from "microbial food web" to large benthic suspension feeders, the oyster Crassostrea gigas was offered a planktonic community as potential prey. In the grazing experiment, all > 5 μm flagellates, microphytoplankton, dinoflagellates, ciliates and large zooplankton were retained by the oyster gills. Only < 5 μm flagellates and picoeukaryotic cells, Ostreococcus tauri, were not very well retained (45 % and 2 %). The high clearance rates of Crassostrea gigas found in this experiment can be explained by a low suspended particulate matter (0.65 mg l-1). Oysters adapted their retention mechanism when they lived in oligotrophic waters. These results indicate that, under the given ... |
author2 |
LIttoral ENvironnement et Sociétés (LIENSs) La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS) Ecosystèmes, biodiversité, évolution Rennes (ECOBIO) Université de Rennes (UR)-Institut Ecologie et Environnement - CNRS Ecologie et Environnement (INEE-CNRS) Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Rennes (OSUR) Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centre National de la Recherche Scientifique (CNRS) Ecosystèmes lagunaires : organisation biologique et fonctionnement (ECOLAG) Université Montpellier 2 - Sciences et Techniques (UM2)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Centre National de la Recherche Scientifique (CNRS) Université de la Polynésie Française (UPF) Systèmes de Référence Temps Espace (SYRTE) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Dupuy, Christine Vaquer, André Lam-Höai, Thong Rougier, Claude Gaertner-Mazouni, Nabila Lautier, Jacques Collos, Yves Le Gall, Solange |
author_facet |
Dupuy, Christine Vaquer, André Lam-Höai, Thong Rougier, Claude Gaertner-Mazouni, Nabila Lautier, Jacques Collos, Yves Le Gall, Solange |
author_sort |
Dupuy, Christine |
title |
Feeding rate of the oyster Crassostrea gigas in a natural planktonic community of the Mediterranean Thau Lagoon |
title_short |
Feeding rate of the oyster Crassostrea gigas in a natural planktonic community of the Mediterranean Thau Lagoon |
title_full |
Feeding rate of the oyster Crassostrea gigas in a natural planktonic community of the Mediterranean Thau Lagoon |
title_fullStr |
Feeding rate of the oyster Crassostrea gigas in a natural planktonic community of the Mediterranean Thau Lagoon |
title_full_unstemmed |
Feeding rate of the oyster Crassostrea gigas in a natural planktonic community of the Mediterranean Thau Lagoon |
title_sort |
feeding rate of the oyster crassostrea gigas in a natural planktonic community of the mediterranean thau lagoon |
publisher |
HAL CCSD |
publishDate |
2000 |
url |
https://hal.science/hal-01248028 https://hal.science/hal-01248028/document https://hal.science/hal-01248028/file/dupuy%20et%20al%202000b.pdf https://doi.org/10.3354/meps205171 |
genre |
Crassostrea gigas |
genre_facet |
Crassostrea gigas |
op_source |
ISSN: 0171-8630 EISSN: 1616-1599 Marine Ecology Progress Series https://hal.science/hal-01248028 Marine Ecology Progress Series, 2000, ⟨10.3354/meps205171⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.3354/meps205171 hal-01248028 https://hal.science/hal-01248028 https://hal.science/hal-01248028/document https://hal.science/hal-01248028/file/dupuy%20et%20al%202000b.pdf doi:10.3354/meps205171 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.3354/meps205171 |
container_title |
Marine Ecology Progress Series |
container_volume |
205 |
container_start_page |
171 |
op_container_end_page |
184 |
_version_ |
1796308250982875136 |
spelling |
ftinsu:oai:HAL:hal-01248028v1 2024-04-14T08:10:37+00:00 Feeding rate of the oyster Crassostrea gigas in a natural planktonic community of the Mediterranean Thau Lagoon Dupuy, Christine Vaquer, André Lam-Höai, Thong Rougier, Claude Gaertner-Mazouni, Nabila Lautier, Jacques Collos, Yves Le Gall, Solange LIttoral ENvironnement et Sociétés (LIENSs) La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS) Ecosystèmes, biodiversité, évolution Rennes (ECOBIO) Université de Rennes (UR)-Institut Ecologie et Environnement - CNRS Ecologie et Environnement (INEE-CNRS) Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Rennes (OSUR) Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centre National de la Recherche Scientifique (CNRS) Ecosystèmes lagunaires : organisation biologique et fonctionnement (ECOLAG) Université Montpellier 2 - Sciences et Techniques (UM2)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Centre National de la Recherche Scientifique (CNRS) Université de la Polynésie Française (UPF) Systèmes de Référence Temps Espace (SYRTE) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS) 2000 https://hal.science/hal-01248028 https://hal.science/hal-01248028/document https://hal.science/hal-01248028/file/dupuy%20et%20al%202000b.pdf https://doi.org/10.3354/meps205171 en eng HAL CCSD Inter Research info:eu-repo/semantics/altIdentifier/doi/10.3354/meps205171 hal-01248028 https://hal.science/hal-01248028 https://hal.science/hal-01248028/document https://hal.science/hal-01248028/file/dupuy%20et%20al%202000b.pdf doi:10.3354/meps205171 info:eu-repo/semantics/OpenAccess ISSN: 0171-8630 EISSN: 1616-1599 Marine Ecology Progress Series https://hal.science/hal-01248028 Marine Ecology Progress Series, 2000, ⟨10.3354/meps205171⟩ Key-words Bivalve oyster food source Thau Lagoon microbial food web heterotrophic protist picophytoplankton trophic link [SDV]Life Sciences [q-bio] info:eu-repo/semantics/article Journal articles 2000 ftinsu https://doi.org/10.3354/meps205171 2024-03-21T17:24:28Z International audience The Mediterranean Thau Lagoon is an important European oyster farming area. Oyster growth levels are among the highest in France, although chlorophyll a concentration is low. Previous studies have demonstrated that picophytoplankton, nano-microphytoplankton, dinoflagellates and loricate ciliates such as tintinnids are abundant in the Thau Lagoon. Moreover, heterotrophic flagellates and aloricate ciliates have not been investigated. The aim of this study was to assess picophytoplankton, protist and zooplankton abundances in water columns of the Thau Lagoon and to understand the particular structure of the Thau microbial food web, which may explain such a paradoxical oyster growth. In oligotrophic waters in the Thau Lagoon, the picoeukaryote Ostreococcus tauri is the dominant autotrophic picoplankter with a maximum Summer abundance. On 17 August 1998, the picophytoplankton and nanophytoplankton abundances were not as high as expected and we observed the development of large diatoms. At this time, available carbon resources arose from microphytoplankton (84.5 %) and picoplanktonic cells represented only 1.27 % in terms of carbon. The heterotrophic cells were few in abundance and constitued only < 14 % of carbon resources. In order to evaluate the importance of the "protozoan trophic link" for energy transfer from "microbial food web" to large benthic suspension feeders, the oyster Crassostrea gigas was offered a planktonic community as potential prey. In the grazing experiment, all > 5 μm flagellates, microphytoplankton, dinoflagellates, ciliates and large zooplankton were retained by the oyster gills. Only < 5 μm flagellates and picoeukaryotic cells, Ostreococcus tauri, were not very well retained (45 % and 2 %). The high clearance rates of Crassostrea gigas found in this experiment can be explained by a low suspended particulate matter (0.65 mg l-1). Oysters adapted their retention mechanism when they lived in oligotrophic waters. These results indicate that, under the given ... Article in Journal/Newspaper Crassostrea gigas Institut national des sciences de l'Univers: HAL-INSU Marine Ecology Progress Series 205 171 184 |