Spatial and temporal adjustments in gill and palp size in the oyster Crassostrea gigas
Spatial and temporal variations in gill and palp size were studied during 1 year in naturally-settled populations of the Pacific oyster Crassostrea gigas, reciprocally transplanted between two contrasting sites located along a marked gradient of turbidity conditions. The variability of suspended par...
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Oxford Univ Press
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Online Access: | https://archimer.ifremer.fr/doc/00351/46223/46145.pdf https://doi.org/10.1093/mollus/eyw025 https://archimer.ifremer.fr/doc/00351/46223/ |
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ftarchimer:oai:archimer.ifremer.fr:46223 2023-05-15T15:58:36+02:00 Spatial and temporal adjustments in gill and palp size in the oyster Crassostrea gigas Dutertre, Mickael Ernande, Bruno Haure, Joel Barille, Laurent 2017-02 application/pdf https://archimer.ifremer.fr/doc/00351/46223/46145.pdf https://doi.org/10.1093/mollus/eyw025 https://archimer.ifremer.fr/doc/00351/46223/ eng eng Oxford Univ Press https://archimer.ifremer.fr/doc/00351/46223/46145.pdf doi:10.1093/mollus/eyw025 https://archimer.ifremer.fr/doc/00351/46223/ The Author 2016. Published by Oxford University Press on behalf of The Malacological Society of London, all rights reserved. For Permissions, please email: journals.permissions@oup.com info:eu-repo/semantics/openAccess restricted use Journal Of Molluscan Studies (0260-1230) (Oxford Univ Press), 2017-02 , Vol. 83 , N. 1 , P. 11-18 text Publication info:eu-repo/semantics/article 2017 ftarchimer https://doi.org/10.1093/mollus/eyw025 2021-09-23T20:28:47Z Spatial and temporal variations in gill and palp size were studied during 1 year in naturally-settled populations of the Pacific oyster Crassostrea gigas, reciprocally transplanted between two contrasting sites located along a marked gradient of turbidity conditions. The variability of suspended particulate matter (SPM) and food particles, estimated by the concentration of chlorophyll-a, was measured with in situ water-quality probes. Over a full seasonal cycle, oysters exposed to high-turbidity (HT) conditions exhibited a lower gill-to-palp (G:P) ratio, compared with those exposed to low-turbidity (LT) conditions. Seasonal variations in the G:P ratio were observed at the LT site in relation to the spring phytoplanktonic bloom, but differed from those that had been observed previously. In fact, palp enlargement and gill narrowing (lower seasonal G:P ratio) suggest that oysters improved their pre-ingestive selection efficiency as a priority, rather than their filtering capacity. This result indicates that suspension-feeding bivalves do not have independent plastic responses of their foraging structures to either SPM quality or quantity, and that the direction of variations in the G:P ratio depends on the combination of these two factors. At the HT site, no seasonal pattern was observed in the G:P ratio. This can be explained by the strong hourly variations in SPM and chlorophyll-a, associated with tidal cycles, with daily variations that can be similar to those observed over a year. Reciprocal transplantations showed that oysters originating from the same site can differ in their feeding apparatus morphology when they grow in different environments and that temporal variations in the G:P ratio of oysters transplanted to a new environment converge towards that of individuals that have spent their entire life in this environment. Variations in the relative gill and palp sizes of C. gigas appear therefore to be partly the consequence of reversible phenotypic plasticity in response to spatial and temporal variations in SPM quantity and quality. The results also suggest that the limits and dynamics of gill and palp plasticity are dependent on the origin of oyster populations. Considering its role in the exploitation of different trophic conditions, and consequently in the biological performances (growth and reproduction), plasticity in the feeding apparatus morphology of C. gigas could be a determinant in the establishment of invasive populations in new ecosystems or in the management of farmed oysters. Article in Journal/Newspaper Crassostrea gigas Pacific oyster Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Pacific Journal of Molluscan Studies 83 1 11 18 |
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 |
description |
Spatial and temporal variations in gill and palp size were studied during 1 year in naturally-settled populations of the Pacific oyster Crassostrea gigas, reciprocally transplanted between two contrasting sites located along a marked gradient of turbidity conditions. The variability of suspended particulate matter (SPM) and food particles, estimated by the concentration of chlorophyll-a, was measured with in situ water-quality probes. Over a full seasonal cycle, oysters exposed to high-turbidity (HT) conditions exhibited a lower gill-to-palp (G:P) ratio, compared with those exposed to low-turbidity (LT) conditions. Seasonal variations in the G:P ratio were observed at the LT site in relation to the spring phytoplanktonic bloom, but differed from those that had been observed previously. In fact, palp enlargement and gill narrowing (lower seasonal G:P ratio) suggest that oysters improved their pre-ingestive selection efficiency as a priority, rather than their filtering capacity. This result indicates that suspension-feeding bivalves do not have independent plastic responses of their foraging structures to either SPM quality or quantity, and that the direction of variations in the G:P ratio depends on the combination of these two factors. At the HT site, no seasonal pattern was observed in the G:P ratio. This can be explained by the strong hourly variations in SPM and chlorophyll-a, associated with tidal cycles, with daily variations that can be similar to those observed over a year. Reciprocal transplantations showed that oysters originating from the same site can differ in their feeding apparatus morphology when they grow in different environments and that temporal variations in the G:P ratio of oysters transplanted to a new environment converge towards that of individuals that have spent their entire life in this environment. Variations in the relative gill and palp sizes of C. gigas appear therefore to be partly the consequence of reversible phenotypic plasticity in response to spatial and temporal variations in SPM quantity and quality. The results also suggest that the limits and dynamics of gill and palp plasticity are dependent on the origin of oyster populations. Considering its role in the exploitation of different trophic conditions, and consequently in the biological performances (growth and reproduction), plasticity in the feeding apparatus morphology of C. gigas could be a determinant in the establishment of invasive populations in new ecosystems or in the management of farmed oysters. |
format |
Article in Journal/Newspaper |
author |
Dutertre, Mickael Ernande, Bruno Haure, Joel Barille, Laurent |
spellingShingle |
Dutertre, Mickael Ernande, Bruno Haure, Joel Barille, Laurent Spatial and temporal adjustments in gill and palp size in the oyster Crassostrea gigas |
author_facet |
Dutertre, Mickael Ernande, Bruno Haure, Joel Barille, Laurent |
author_sort |
Dutertre, Mickael |
title |
Spatial and temporal adjustments in gill and palp size in the oyster Crassostrea gigas |
title_short |
Spatial and temporal adjustments in gill and palp size in the oyster Crassostrea gigas |
title_full |
Spatial and temporal adjustments in gill and palp size in the oyster Crassostrea gigas |
title_fullStr |
Spatial and temporal adjustments in gill and palp size in the oyster Crassostrea gigas |
title_full_unstemmed |
Spatial and temporal adjustments in gill and palp size in the oyster Crassostrea gigas |
title_sort |
spatial and temporal adjustments in gill and palp size in the oyster crassostrea gigas |
publisher |
Oxford Univ Press |
publishDate |
2017 |
url |
https://archimer.ifremer.fr/doc/00351/46223/46145.pdf https://doi.org/10.1093/mollus/eyw025 https://archimer.ifremer.fr/doc/00351/46223/ |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Crassostrea gigas Pacific oyster |
genre_facet |
Crassostrea gigas Pacific oyster |
op_source |
Journal Of Molluscan Studies (0260-1230) (Oxford Univ Press), 2017-02 , Vol. 83 , N. 1 , P. 11-18 |
op_relation |
https://archimer.ifremer.fr/doc/00351/46223/46145.pdf doi:10.1093/mollus/eyw025 https://archimer.ifremer.fr/doc/00351/46223/ |
op_rights |
The Author 2016. Published by Oxford University Press on behalf of The Malacological Society of London, all rights reserved. For Permissions, please email: journals.permissions@oup.com info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1093/mollus/eyw025 |
container_title |
Journal of Molluscan Studies |
container_volume |
83 |
container_issue |
1 |
container_start_page |
11 |
op_container_end_page |
18 |
_version_ |
1766394370433482752 |