Understanding drivers of wild oyster population persistence

Abstract Persistence of wild Pacific oyster, Magallana gigas, also known as Crassostrea gigas, has been increasingly reported across Northern European waters in recent years. While reproduction is inhibited by cold waters, recent warm summer temperature has increased the frequency of spawning events...

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Autores principales:	Mickael Teixeira Alves, Nick G. H. Taylor, Hannah J. Tidbury
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/c57a82f480ee48a589ff08e19d46fdd6
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spelling	oai:doaj.org-article:c57a82f480ee48a589ff08e19d46fdd62021-12-02T14:37:15ZUnderstanding drivers of wild oyster population persistence10.1038/s41598-021-87418-12045-2322https://doaj.org/article/c57a82f480ee48a589ff08e19d46fdd62021-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-87418-1https://doaj.org/toc/2045-2322Abstract Persistence of wild Pacific oyster, Magallana gigas, also known as Crassostrea gigas, has been increasingly reported across Northern European waters in recent years. While reproduction is inhibited by cold waters, recent warm summer temperature has increased the frequency of spawning events. Although correlation between the increasing abundance of Pacific oyster reefs in Northern European waters and climate change is documented, persistence of wild populations may also be influenced by external recruitment from farmed populations and other wild oyster populations, as well as on competition for resources with aquaculture sites. Our understanding of the combined impact of the spawning frequency, external recruitment, and competition on wild population persistence is limited. This study applied an age-structured model, based on ordinary differential equations, to describe an oyster population under discrete temperature-related dynamics. The impact of more frequent spawning events, external recruitment, and changes in carrying capacity on Pacific oyster density were simulated and compared under theoretical scenarios and two case studies in Southern England. Results indicate that long term persistence of wild oyster populations towards carrying capacity requires a high frequency of spawning events but that in the absence of spawning, external recruitment from farmed populations and other wild oyster populations may act to prevent extinction and increase population density. However, external recruitment sources may be in competition with the wild population so that external recruitment is associated with a reduction in wild population density. The implications of model results are discussed in the context of wild oyster population management.Mickael Teixeira AlvesNick G. H. TaylorHannah J. TidburyNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-14 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Mickael Teixeira Alves Nick G. H. Taylor Hannah J. Tidbury Understanding drivers of wild oyster population persistence
description	Abstract Persistence of wild Pacific oyster, Magallana gigas, also known as Crassostrea gigas, has been increasingly reported across Northern European waters in recent years. While reproduction is inhibited by cold waters, recent warm summer temperature has increased the frequency of spawning events. Although correlation between the increasing abundance of Pacific oyster reefs in Northern European waters and climate change is documented, persistence of wild populations may also be influenced by external recruitment from farmed populations and other wild oyster populations, as well as on competition for resources with aquaculture sites. Our understanding of the combined impact of the spawning frequency, external recruitment, and competition on wild population persistence is limited. This study applied an age-structured model, based on ordinary differential equations, to describe an oyster population under discrete temperature-related dynamics. The impact of more frequent spawning events, external recruitment, and changes in carrying capacity on Pacific oyster density were simulated and compared under theoretical scenarios and two case studies in Southern England. Results indicate that long term persistence of wild oyster populations towards carrying capacity requires a high frequency of spawning events but that in the absence of spawning, external recruitment from farmed populations and other wild oyster populations may act to prevent extinction and increase population density. However, external recruitment sources may be in competition with the wild population so that external recruitment is associated with a reduction in wild population density. The implications of model results are discussed in the context of wild oyster population management.
format	article
author	Mickael Teixeira Alves Nick G. H. Taylor Hannah J. Tidbury
author_facet	Mickael Teixeira Alves Nick G. H. Taylor Hannah J. Tidbury
author_sort	Mickael Teixeira Alves
title	Understanding drivers of wild oyster population persistence
title_short	Understanding drivers of wild oyster population persistence
title_full	Understanding drivers of wild oyster population persistence
title_fullStr	Understanding drivers of wild oyster population persistence
title_full_unstemmed	Understanding drivers of wild oyster population persistence
title_sort	understanding drivers of wild oyster population persistence
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/c57a82f480ee48a589ff08e19d46fdd6
work_keys_str_mv	AT mickaelteixeiraalves understandingdriversofwildoysterpopulationpersistence AT nickghtaylor understandingdriversofwildoysterpopulationpersistence AT hannahjtidbury understandingdriversofwildoysterpopulationpersistence
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Understanding drivers of wild oyster population persistence

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