Connectivities with shellfish farms and channel rivers are associated with mortality risk in oysters
Oyster diseases have major consequences on fisheries and aquaculture. In France, young Pacific oysters Crassostrea gigas are severely hit by the ostreid herpesvirus, whereas adults suffer mortalities presumably caused by pathogenic bacteria. Here we investigated the origin and spread of mortalities...
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ftdoajarticles:oai:doaj.org/article:77dcbcf637894f63baa2ac43565777f7 2023-05-15T15:58:51+02:00 Connectivities with shellfish farms and channel rivers are associated with mortality risk in oysters Gangnery, A Normand, J Duval, C Cugier, P Grangeré, K Petton, B Petton, S Orvain, F Pernet, F 2019-09-01T00:00:00Z https://doi.org/10.3354/aei00327 https://doaj.org/article/77dcbcf637894f63baa2ac43565777f7 EN eng Inter-Research https://www.int-res.com/abstracts/aei/v11/p493-506/ https://doaj.org/toc/1869-215X https://doaj.org/toc/1869-7534 1869-215X 1869-7534 doi:10.3354/aei00327 https://doaj.org/article/77dcbcf637894f63baa2ac43565777f7 Aquaculture Environment Interactions, Vol 11, Pp 493-506 (2019) Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5 article 2019 ftdoajarticles https://doi.org/10.3354/aei00327 2022-12-31T01:28:40Z Oyster diseases have major consequences on fisheries and aquaculture. In France, young Pacific oysters Crassostrea gigas are severely hit by the ostreid herpesvirus, whereas adults suffer mortalities presumably caused by pathogenic bacteria. Here we investigated the origin and spread of mortalities that affect both young and adult oysters, and we identified and compared their risk factors. Mortality was monitored in 2 age classes of oysters deployed in early spring at 39 sites spread over a 37 km2 surface area inside and outside of shellfish farms. Environmental data obtained from numerical modelling were used to investigate risk factors. Mortality of young oysters associated with ostreid herpesvirus occurred in the oyster farming area. Hydrodynamic connectivity with oyster farms was associated with higher mortality risk, whereas chlorophyll a concentration was associated with a lower risk. Adult oysters experienced 2 mortality events that were associated with different risk factors. The first event, which occurred after deployment and was probably caused by endogenous pathogens, was mainly associated with connectivity to channel rivers and salinity. The second mortality event observed at the end of the summer was mainly associated with connectivity to oyster farms, suggesting pathogen transmission. The risk factors involved in young and adult oyster mortalities were partly different, reflecting distinct origins. Connectivity with oyster farms is a mortality risk factor for both young and adult oysters; thus, disease management strategies that focus on oyster farming areas will impact overall disease risk. Article in Journal/Newspaper Crassostrea gigas Directory of Open Access Journals: DOAJ Articles Pacific Aquaculture Environment Interactions 11 493 506 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5 |
spellingShingle |
Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5 Gangnery, A Normand, J Duval, C Cugier, P Grangeré, K Petton, B Petton, S Orvain, F Pernet, F Connectivities with shellfish farms and channel rivers are associated with mortality risk in oysters |
topic_facet |
Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5 |
description |
Oyster diseases have major consequences on fisheries and aquaculture. In France, young Pacific oysters Crassostrea gigas are severely hit by the ostreid herpesvirus, whereas adults suffer mortalities presumably caused by pathogenic bacteria. Here we investigated the origin and spread of mortalities that affect both young and adult oysters, and we identified and compared their risk factors. Mortality was monitored in 2 age classes of oysters deployed in early spring at 39 sites spread over a 37 km2 surface area inside and outside of shellfish farms. Environmental data obtained from numerical modelling were used to investigate risk factors. Mortality of young oysters associated with ostreid herpesvirus occurred in the oyster farming area. Hydrodynamic connectivity with oyster farms was associated with higher mortality risk, whereas chlorophyll a concentration was associated with a lower risk. Adult oysters experienced 2 mortality events that were associated with different risk factors. The first event, which occurred after deployment and was probably caused by endogenous pathogens, was mainly associated with connectivity to channel rivers and salinity. The second mortality event observed at the end of the summer was mainly associated with connectivity to oyster farms, suggesting pathogen transmission. The risk factors involved in young and adult oyster mortalities were partly different, reflecting distinct origins. Connectivity with oyster farms is a mortality risk factor for both young and adult oysters; thus, disease management strategies that focus on oyster farming areas will impact overall disease risk. |
format |
Article in Journal/Newspaper |
author |
Gangnery, A Normand, J Duval, C Cugier, P Grangeré, K Petton, B Petton, S Orvain, F Pernet, F |
author_facet |
Gangnery, A Normand, J Duval, C Cugier, P Grangeré, K Petton, B Petton, S Orvain, F Pernet, F |
author_sort |
Gangnery, A |
title |
Connectivities with shellfish farms and channel rivers are associated with mortality risk in oysters |
title_short |
Connectivities with shellfish farms and channel rivers are associated with mortality risk in oysters |
title_full |
Connectivities with shellfish farms and channel rivers are associated with mortality risk in oysters |
title_fullStr |
Connectivities with shellfish farms and channel rivers are associated with mortality risk in oysters |
title_full_unstemmed |
Connectivities with shellfish farms and channel rivers are associated with mortality risk in oysters |
title_sort |
connectivities with shellfish farms and channel rivers are associated with mortality risk in oysters |
publisher |
Inter-Research |
publishDate |
2019 |
url |
https://doi.org/10.3354/aei00327 https://doaj.org/article/77dcbcf637894f63baa2ac43565777f7 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Crassostrea gigas |
genre_facet |
Crassostrea gigas |
op_source |
Aquaculture Environment Interactions, Vol 11, Pp 493-506 (2019) |
op_relation |
https://www.int-res.com/abstracts/aei/v11/p493-506/ https://doaj.org/toc/1869-215X https://doaj.org/toc/1869-7534 1869-215X 1869-7534 doi:10.3354/aei00327 https://doaj.org/article/77dcbcf637894f63baa2ac43565777f7 |
op_doi |
https://doi.org/10.3354/aei00327 |
container_title |
Aquaculture Environment Interactions |
container_volume |
11 |
container_start_page |
493 |
op_container_end_page |
506 |
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1766394613285781504 |