Spatial patterns in the condition index of the wild Pacific oyster Crassostrea gigas in a macrotidal coastal ecosystem: Influence of tidal processes and beyond
In macrotidal coastal ecosystems, spatial heterogeneity of the water column properties is induced by both oceanic and continental influences. Hydrodynamic processes generate a land-sea gradient of environmental conditions, affecting the biological performances of sedentary organisms. The aim of the...
Published in: | Journal of Sea Research |
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Language: | English |
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2017
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Online Access: | https://oskar-bordeaux.fr/handle/20.500.12278/200193 https://hdl.handle.net/20.500.12278/200193 https://doi.org/10.1016/j.seares.2016.10.008 |
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ftoskarbordeaux:oai:oskar-bordeaux.fr:20.500.12278/200193 2024-06-23T07:52:16+00:00 Spatial patterns in the condition index of the wild Pacific oyster Crassostrea gigas in a macrotidal coastal ecosystem: Influence of tidal processes and beyond GASMI, Sonia BERNARD, Ismaël POUVREAU, Stéphane MAURER, Daniele SCHAAL, Gauthier GANTHY, Florian COMINASSI, Louise ALLAIN, Gwenhael SAUTOUR, Benoit DAVID, Valérie 2017-01 https://oskar-bordeaux.fr/handle/20.500.12278/200193 https://hdl.handle.net/20.500.12278/200193 https://doi.org/10.1016/j.seares.2016.10.008 EN eng 1385-1101 https://oskar-bordeaux.fr/handle/20.500.12278/200193 doi:10.1016/j.seares.2016.10.008 open Pas de Licence CC Oceanic flushing Reproductive investment ACL Crassostrea gigas Environmental variability Immersion level Macrotidal lagoon Sciences du Vivant [q-bio]/Biologie animale/Zoologie des invertébrés Planète et Univers [physics]/Sciences de la Terre/Océanographie Sciences de l'environnement/Biodiversité et Ecologie Article de revue 2017 ftoskarbordeaux https://doi.org/20.500.12278/20019310.1016/j.seares.2016.10.008 2024-06-03T14:02:29Z In macrotidal coastal ecosystems, spatial heterogeneity of the water column properties is induced by both oceanic and continental influences. Hydrodynamic processes generate a land-sea gradient of environmental conditions, affecting the biological performances of sedentary organisms. The aim of the present study is to establish an extensive spatial assessment in the reproductive investment of the wild Pacific oyster Crassostrea gigas in Arcachon Bay. This is done by looking for a relationship between the Lawrence and Scott condition index (LSCI) and two tidal processes: the immersion level (IL) and the local oceanic flushing time (LoFt). The LSCI of C. gigas was assessed, just before gamete release, at 68 sampling stations in Arcachon Bay. Oyster performance was overall low and spatially variable. Significant differences in the LSCI were detected between the outer and inner bay. Oyster reefs located toward the mouth of the bay exhibited high LSCI (between 9 and 11), while oyster reefs located in inner bay, especially in south-eastern part around the Eyre River, had low LSCI (below 6). Linear modelling allowed to highlight significant effects of both tidal processes IL and LoFt on the obtained LSCI gradient. IL, LoFt explained 33% of the spatial variability observed on LSCI (IL = 3%; LoFt = 17%; LoFt + IL: 13%), 6% were attributed to the intra-station variation (ISv). Thus, high IL and rapid LoFt favor a better development of somatic-gonadal volume, probably because of longer feeding time and higher supply of food from the ocean by tide flows. Disentangling the effects of IL and LoFt on LSCI allowed to describe the spatial pattern in 61% of variability not explained by both tidal factors. A residual gradient directed southeast-northwest highlighted that others factors, independent from IL and LoFt seems to hamper inner bay oyster reproductive performance. Consequently, investigating on the ecological functioning (Eyre influences), trophic potential and anthropogenic pressures of this zone seem crucial on the ... Article in Journal/Newspaper Crassostrea gigas Pacific oyster OSKAR Bordeaux (Open Science Knowledge ARchive) Pacific Inner Bay ENVELOPE(-37.967,-37.967,-54.017,-54.017) Journal of Sea Research 119 28 36 |
institution |
Open Polar |
collection |
OSKAR Bordeaux (Open Science Knowledge ARchive) |
op_collection_id |
ftoskarbordeaux |
language |
English |
topic |
Oceanic flushing Reproductive investment ACL Crassostrea gigas Environmental variability Immersion level Macrotidal lagoon Sciences du Vivant [q-bio]/Biologie animale/Zoologie des invertébrés Planète et Univers [physics]/Sciences de la Terre/Océanographie Sciences de l'environnement/Biodiversité et Ecologie |
spellingShingle |
Oceanic flushing Reproductive investment ACL Crassostrea gigas Environmental variability Immersion level Macrotidal lagoon Sciences du Vivant [q-bio]/Biologie animale/Zoologie des invertébrés Planète et Univers [physics]/Sciences de la Terre/Océanographie Sciences de l'environnement/Biodiversité et Ecologie GASMI, Sonia BERNARD, Ismaël POUVREAU, Stéphane MAURER, Daniele SCHAAL, Gauthier GANTHY, Florian COMINASSI, Louise ALLAIN, Gwenhael SAUTOUR, Benoit DAVID, Valérie Spatial patterns in the condition index of the wild Pacific oyster Crassostrea gigas in a macrotidal coastal ecosystem: Influence of tidal processes and beyond |
topic_facet |
Oceanic flushing Reproductive investment ACL Crassostrea gigas Environmental variability Immersion level Macrotidal lagoon Sciences du Vivant [q-bio]/Biologie animale/Zoologie des invertébrés Planète et Univers [physics]/Sciences de la Terre/Océanographie Sciences de l'environnement/Biodiversité et Ecologie |
description |
In macrotidal coastal ecosystems, spatial heterogeneity of the water column properties is induced by both oceanic and continental influences. Hydrodynamic processes generate a land-sea gradient of environmental conditions, affecting the biological performances of sedentary organisms. The aim of the present study is to establish an extensive spatial assessment in the reproductive investment of the wild Pacific oyster Crassostrea gigas in Arcachon Bay. This is done by looking for a relationship between the Lawrence and Scott condition index (LSCI) and two tidal processes: the immersion level (IL) and the local oceanic flushing time (LoFt). The LSCI of C. gigas was assessed, just before gamete release, at 68 sampling stations in Arcachon Bay. Oyster performance was overall low and spatially variable. Significant differences in the LSCI were detected between the outer and inner bay. Oyster reefs located toward the mouth of the bay exhibited high LSCI (between 9 and 11), while oyster reefs located in inner bay, especially in south-eastern part around the Eyre River, had low LSCI (below 6). Linear modelling allowed to highlight significant effects of both tidal processes IL and LoFt on the obtained LSCI gradient. IL, LoFt explained 33% of the spatial variability observed on LSCI (IL = 3%; LoFt = 17%; LoFt + IL: 13%), 6% were attributed to the intra-station variation (ISv). Thus, high IL and rapid LoFt favor a better development of somatic-gonadal volume, probably because of longer feeding time and higher supply of food from the ocean by tide flows. Disentangling the effects of IL and LoFt on LSCI allowed to describe the spatial pattern in 61% of variability not explained by both tidal factors. A residual gradient directed southeast-northwest highlighted that others factors, independent from IL and LoFt seems to hamper inner bay oyster reproductive performance. Consequently, investigating on the ecological functioning (Eyre influences), trophic potential and anthropogenic pressures of this zone seem crucial on the ... |
format |
Article in Journal/Newspaper |
author |
GASMI, Sonia BERNARD, Ismaël POUVREAU, Stéphane MAURER, Daniele SCHAAL, Gauthier GANTHY, Florian COMINASSI, Louise ALLAIN, Gwenhael SAUTOUR, Benoit DAVID, Valérie |
author_facet |
GASMI, Sonia BERNARD, Ismaël POUVREAU, Stéphane MAURER, Daniele SCHAAL, Gauthier GANTHY, Florian COMINASSI, Louise ALLAIN, Gwenhael SAUTOUR, Benoit DAVID, Valérie |
author_sort |
GASMI, Sonia |
title |
Spatial patterns in the condition index of the wild Pacific oyster Crassostrea gigas in a macrotidal coastal ecosystem: Influence of tidal processes and beyond |
title_short |
Spatial patterns in the condition index of the wild Pacific oyster Crassostrea gigas in a macrotidal coastal ecosystem: Influence of tidal processes and beyond |
title_full |
Spatial patterns in the condition index of the wild Pacific oyster Crassostrea gigas in a macrotidal coastal ecosystem: Influence of tidal processes and beyond |
title_fullStr |
Spatial patterns in the condition index of the wild Pacific oyster Crassostrea gigas in a macrotidal coastal ecosystem: Influence of tidal processes and beyond |
title_full_unstemmed |
Spatial patterns in the condition index of the wild Pacific oyster Crassostrea gigas in a macrotidal coastal ecosystem: Influence of tidal processes and beyond |
title_sort |
spatial patterns in the condition index of the wild pacific oyster crassostrea gigas in a macrotidal coastal ecosystem: influence of tidal processes and beyond |
publishDate |
2017 |
url |
https://oskar-bordeaux.fr/handle/20.500.12278/200193 https://hdl.handle.net/20.500.12278/200193 https://doi.org/10.1016/j.seares.2016.10.008 |
long_lat |
ENVELOPE(-37.967,-37.967,-54.017,-54.017) |
geographic |
Pacific Inner Bay |
geographic_facet |
Pacific Inner Bay |
genre |
Crassostrea gigas Pacific oyster |
genre_facet |
Crassostrea gigas Pacific oyster |
op_relation |
1385-1101 https://oskar-bordeaux.fr/handle/20.500.12278/200193 doi:10.1016/j.seares.2016.10.008 |
op_rights |
open Pas de Licence CC |
op_doi |
https://doi.org/20.500.12278/20019310.1016/j.seares.2016.10.008 |
container_title |
Journal of Sea Research |
container_volume |
119 |
container_start_page |
28 |
op_container_end_page |
36 |
_version_ |
1802643521042120704 |