Farmed bivalve loss due to seabream predation in the French Mediterranean Prevost Lagoon
Bivalve predation by seabream has been observed worldwide and is a major concern for bivalve farmers. Farmed bivalve-seabream interactions must be better understood to ensure the sustainability of bivalve aquaculture. The objectives of this study were to characterize gilthead seabream Sparus aurata...
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ftdoajarticles:oai:doaj.org/article:6ba9d54d62514da2837c64d1fb52dbe6 2023-05-15T15:58:56+02:00 Farmed bivalve loss due to seabream predation in the French Mediterranean Prevost Lagoon M Richard F Forget A Mignucci S Mortreux P Le Gall MD Callier AM Weise CW McKindsey J Bourjea 2020-12-01T00:00:00Z https://doi.org/10.3354/aei00383 https://doaj.org/article/6ba9d54d62514da2837c64d1fb52dbe6 EN eng Inter-Research https://www.int-res.com/abstracts/aei/v12/p529-540/ https://doaj.org/toc/1869-215X https://doaj.org/toc/1869-7534 1869-215X 1869-7534 doi:10.3354/aei00383 https://doaj.org/article/6ba9d54d62514da2837c64d1fb52dbe6 Aquaculture Environment Interactions, Vol 12, Pp 529-540 (2020) Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5 article 2020 ftdoajarticles https://doi.org/10.3354/aei00383 2022-12-31T06:50:23Z Bivalve predation by seabream has been observed worldwide and is a major concern for bivalve farmers. Farmed bivalve-seabream interactions must be better understood to ensure the sustainability of bivalve aquaculture. The objectives of this study were to characterize gilthead seabream Sparus aurata presence in a bivalve farm in Prevost Lagoon (Mediterranean Sea) using acoustic telemetry and to evaluate monthly losses of mussels Mytilus galloprovincialis and oysters Crassostrea gigas due to seabream predation over an 18 mo period inside the farm and at an unprotected experimental platform. Large (281 to 499 mm TL) seabream were more commonly detected in the bivalve farm than were small (200 to 280 mm TL) seabream. In contrast to small seabream, 90% of large seabream returned to and spent extended periods in the study area the following year, suggesting inter-annual site fidelity for large fish that used the bivalve farm as a feeding site. Signs of predation were observed on mussels and oysters throughout the year at the unprotected experimental platform. Farmers noted losses in the farm from April to September. Maximal losses (90 to 100%) were observed post-oyster ‘sticking’ and mussel socking. Despite the deployment of nets as mechanical protection to reduce predation, oyster losses represented 28% of the annual value of oysters sold while mussel losses were estimated at ca. 1%. These results suggest that bivalves must be protected by nets throughout the year to avoid predation, particularly post-handling. A collaboration between shellfish farmers and fishermen could be a sustainable solution for bivalve farming, by regularly fishing for seabream in farms, between tables and inside protective nets. Article in Journal/Newspaper Crassostrea gigas Directory of Open Access Journals: DOAJ Articles Aquaculture Environment Interactions 12 529 540 |
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 M Richard F Forget A Mignucci S Mortreux P Le Gall MD Callier AM Weise CW McKindsey J Bourjea Farmed bivalve loss due to seabream predation in the French Mediterranean Prevost Lagoon |
topic_facet |
Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5 |
description |
Bivalve predation by seabream has been observed worldwide and is a major concern for bivalve farmers. Farmed bivalve-seabream interactions must be better understood to ensure the sustainability of bivalve aquaculture. The objectives of this study were to characterize gilthead seabream Sparus aurata presence in a bivalve farm in Prevost Lagoon (Mediterranean Sea) using acoustic telemetry and to evaluate monthly losses of mussels Mytilus galloprovincialis and oysters Crassostrea gigas due to seabream predation over an 18 mo period inside the farm and at an unprotected experimental platform. Large (281 to 499 mm TL) seabream were more commonly detected in the bivalve farm than were small (200 to 280 mm TL) seabream. In contrast to small seabream, 90% of large seabream returned to and spent extended periods in the study area the following year, suggesting inter-annual site fidelity for large fish that used the bivalve farm as a feeding site. Signs of predation were observed on mussels and oysters throughout the year at the unprotected experimental platform. Farmers noted losses in the farm from April to September. Maximal losses (90 to 100%) were observed post-oyster ‘sticking’ and mussel socking. Despite the deployment of nets as mechanical protection to reduce predation, oyster losses represented 28% of the annual value of oysters sold while mussel losses were estimated at ca. 1%. These results suggest that bivalves must be protected by nets throughout the year to avoid predation, particularly post-handling. A collaboration between shellfish farmers and fishermen could be a sustainable solution for bivalve farming, by regularly fishing for seabream in farms, between tables and inside protective nets. |
format |
Article in Journal/Newspaper |
author |
M Richard F Forget A Mignucci S Mortreux P Le Gall MD Callier AM Weise CW McKindsey J Bourjea |
author_facet |
M Richard F Forget A Mignucci S Mortreux P Le Gall MD Callier AM Weise CW McKindsey J Bourjea |
author_sort |
M Richard |
title |
Farmed bivalve loss due to seabream predation in the French Mediterranean Prevost Lagoon |
title_short |
Farmed bivalve loss due to seabream predation in the French Mediterranean Prevost Lagoon |
title_full |
Farmed bivalve loss due to seabream predation in the French Mediterranean Prevost Lagoon |
title_fullStr |
Farmed bivalve loss due to seabream predation in the French Mediterranean Prevost Lagoon |
title_full_unstemmed |
Farmed bivalve loss due to seabream predation in the French Mediterranean Prevost Lagoon |
title_sort |
farmed bivalve loss due to seabream predation in the french mediterranean prevost lagoon |
publisher |
Inter-Research |
publishDate |
2020 |
url |
https://doi.org/10.3354/aei00383 https://doaj.org/article/6ba9d54d62514da2837c64d1fb52dbe6 |
genre |
Crassostrea gigas |
genre_facet |
Crassostrea gigas |
op_source |
Aquaculture Environment Interactions, Vol 12, Pp 529-540 (2020) |
op_relation |
https://www.int-res.com/abstracts/aei/v12/p529-540/ https://doaj.org/toc/1869-215X https://doaj.org/toc/1869-7534 1869-215X 1869-7534 doi:10.3354/aei00383 https://doaj.org/article/6ba9d54d62514da2837c64d1fb52dbe6 |
op_doi |
https://doi.org/10.3354/aei00383 |
container_title |
Aquaculture Environment Interactions |
container_volume |
12 |
container_start_page |
529 |
op_container_end_page |
540 |
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1766394703260942336 |