Divergence in salinity tolerance of northern Gulf of Mexico eastern oysters under field and laboratory exposure

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dc.contributor.authorMarshall, Danielle A.
dc.contributor.authorCasas, Sandra M.
dc.contributor.authorWalton, William C.
dc.contributor.authorRikard, F. Scott
dc.contributor.authorPalmer, Terence A.
dc.contributor.authorBreaux, Natasha J.
dc.contributor.authorLa Peyre, Megan K.
dc.contributor.authorPollack, Jennifer Beseres
dc.contributor.authorKelly, Morgan
dc.contributor.authorLa Peyre, Jerome F.
dc.date.accessioned2022-09-14T21:55:31Z
dc.date.available2022-09-14T21:55:31Z
dc.date.issued2021-08-23
dc.description.abstractThe eastern oyster, Crassostrea virginica, is a foundation species within US Gulf of Mexico (GoM) estuaries that has experienced substantial population declines. As changes from management and climate are expected to continue to impact estuarine salinity, understanding how local oyster populations might respond and identifying populations with adaptations to more extreme changes in salinity could inform resource management, including restoration and aquaculture programs. Wild oysters were collected from four estuarine sites from Texas [Packery Channel (PC): 35.5, annual mean salinity, Aransas Bay (AB): 23.0] and Louisiana [Calcasieu Lake (CL): 16.2, Vermilion Bay (VB): 7.4] and spawned. The progeny were compared in field and laboratory studies under different salinity regimes. For the field study, F1 oysters were deployed at low (6.4) and intermediate (16.5) salinity sites in Alabama. Growth and mortality were measured monthly. Condition index and Perkinsus marinus infection intensity were measured quarterly. For the laboratory studies, mortality was recorded in F1 oysters that were exposed to salinities of 2.0, 4.0, 20.0/22.0, 38.0 and 44.0 with and without acclimation. The results of the field study and laboratory study with acclimation indicated that PC oysters are adapted to high-salinity conditions and do not tolerate very low salinities. The AB stock had the highest plasticity as it performed as well as the PC stock at high salinities and as well as Louisiana stocks at the lowest salinity. Louisiana stocks did not perform as well as the Texas stocks at high salinities. Results from the laboratory studies without salinity acclimation showed that all F1 stocks experiencing rapid mortality at low salinities when 3-month oysters collected at a salinity of 24 were used and at both low and high salinities when 7-month oysters collected at a salinity of 14.5 were used.en_US
dc.identifier.citationMarshall DA, Casas S, Walton W, Rikard F, Palmer TA, Breaux N, La Peyre M, Beseres Pollack J, La Peyre J (2021). Divergence in salinity tolerance of northern Gulf of Mexico eastern oysters under field and laboratory exposure. Conservation Physiology. https://doi.org/10.1093/conphys/coab065en_US
dc.identifier.doihttps://doi.org/10.1093/conphys/coab065
dc.identifier.urihttps://hdl.handle.net/1969.6/93982
dc.publisherConservation Physiologyen_US
dc.subjectRestorationen_US
dc.subjectLocal Adaptationen_US
dc.subjectCrassostrea virginicaen_US
dc.subjectClimate Changeen_US
dc.subjectBivalvesen_US
dc.subjectAquacultureen_US
dc.titleDivergence in salinity tolerance of northern Gulf of Mexico eastern oysters under field and laboratory exposureen_US
dc.typeArticleen_US

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