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Feeding behavior of eastern oysters <I>Crassostrea virginica</I> and hard clams <I>Mercenaria mercenaria</I> in shallow estuaries

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dc.contributor.author Galimany, Eve en
dc.contributor.author Lunt, Jessica en
dc.contributor.author Freeman, Christopher J. en
dc.contributor.author Reed, S. en
dc.contributor.author Segura-García, Iris en
dc.contributor.author Paul, Valerie J. en
dc.date.accessioned 2017-04-27T14:39:55Z
dc.date.available 2017-04-27T14:39:55Z
dc.date.issued 2017
dc.identifier.citation Galimany, Eve, Lunt, Jessica, Freeman, Christopher J., Reed, S., Segura-García, Iris, and Paul, Valerie J. 2017. "<a href="https://repository.si.edu/handle/10088/32271">Feeding behavior of eastern oysters Crassostrea virginica and hard clams Mercenaria mercenaria in shallow estuaries</a>." <em>Marine Ecology Progress Series</em>. 567:125&ndash;137. <a href="https://doi.org/10.3354/meps12050">https://doi.org/10.3354/meps12050</a> en
dc.identifier.issn 0171-8630
dc.identifier.uri https://hdl.handle.net/10088/32271
dc.description.abstract ABSTRACT: Eastern oysters <I>Crassostrea virginica</I> and hard clams <I>Mercenaria mercenaria</I> are key organisms for both the ecosystem services they provide and for their commercial value, but their populations have declined greatly worldwide. In an attempt to understand the interaction between bivalve physiology and environmental conditions, filter-feeding assays were carried out in a shallow estuary, the Indian River Lagoon (IRL; Florida, USA). The feeding behavior of the bivalves was studied using <I>in situ</I> filter-feeding devices and the biodeposition method in the 3 basins of the IRL during March and August 2015. Water characteristics (temperature, salinity, dissolved oxygen, chl <I>a</I>, and total, organic, and inorganic particulates) were related to possible changes in the feeding physiology of the bivalves. Oysters had higher clearance rates, filtration rates, and rejection than clams. The high rejection of inorganic matter allowed oysters to increase the organic matter ingested, leading to high absorption efficiencies. In contrast, because clam rejection was low regardless of elevated levels of inorganic matter, their absorption efficiency only increased with higher organic matter content. Both species preferred higher salinities, and the amount of organic matter in the water had a negative relationship with some feeding parameters (filtration rate for both species, and rejection for oysters). Acute environmental change brought about by a brown tide (caused by the alga <I>Aureoumbra lagunensis</I>) also affected these 2 bivalve species differently, supporting the hypothesis that oysters and clams have different physiological capabilities that drive their ability to survive in dynamic estuarine ecosystems. en
dc.relation.ispartof Marine Ecology Progress Series en
dc.title Feeding behavior of eastern oysters <I>Crassostrea virginica</I> and hard clams <I>Mercenaria mercenaria</I> in shallow estuaries en
dc.type Journal Article en
dc.identifier.srbnumber 142549
dc.identifier.doi 10.3354/meps12050
rft.jtitle Marine Ecology Progress Series
rft.volume 567
rft.spage 125
rft.epage 137
dc.description.SIUnit NMNH en
dc.description.SIUnit NH-SMS en
dc.description.SIUnit Peer-reviewed en
dc.citation.spage 125
dc.citation.epage 137


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