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The influence of salinity on ontogenetic larval swimming behavior and juvenile growth of oysters
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Manuel, Emily Clare. The influence of salinity on ontogenetic larval swimming behavior and juvenile growth of oysters. Retrieved from https://doi.org/doi:10.7282/t3-r9rv-eb87

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TitleThe influence of salinity on ontogenetic larval swimming behavior and juvenile growth of oysters
NameManuel, Emily Clare (author); Munroe, Daphne (chair); Pinsky, Malin (member); Grothues, Thomas (member); Rutgers University; School of Graduate Studies
Date Created2022
Other Date2022-05 (degree)
SubjectBiological oceanography, Behavior, Growth, Juveniles, Larvae, Oyster, Salinity
Extent83 pages : illustrations
DescriptionOysters live a bipartite life with a free swimming larval stage followed by sessile juvenile and adult stages. Dynamic estuarine environments can challenge non-motile organisms because they cannot relocate if local conditions become unfavorable. The few weeks long larval period is the only time oysters can redistribute in an estuary. The larval period is also the mechanism by which oyster populations are connected. Larval dispersal is frequently treated as passive, but swimming can contribute to dispersal and subsequent settlement habitat choice. This thesis addresses that life history stage. Chapter 1 focuses on how larval oyster swimming changes with salinity and through ontogeny. Salinity should be an important cue to directed movement because salinity affects oyster growth with higher (downbay) salinity favors subsequent oyster growth. Understanding how oyster growth will be affected by low salinity events is examined in chapter 2.In the larval swimming chapter (1), acclimation time, swimming speed and exploration characteristics, and frequency of behaviors were measured in different salinities and over ontogeny. Time to acclimation increased in decreasing salinity, and decreased over ontogeny. Larval swimming characteristics did not differ among salinity treatments, but varied over ontogeny (i.e. older larvae swam faster and explored more). Larvae dove more frequently in low salinity, yet diving frequency did not change over ontogeny. In the oyster spat growth chapter (2), growth was measured in different salinities as it relates to previous salinity history and shell morphology. Spat growth rate decreased with decreasing salinity but prior salinity experience was the main factor influencing growth rate. Shell morphology did not affect spat growth rate. With climate change increasing the frequency and severity of storms, understanding the response of larval swimming and juvenile oyster growth to acute changes in salinity is necessary for population persistence given their many ecosystem services which humans rely on.
NoteM.S.
NoteIncludes bibliographical references
Genretheses
Persistent URLhttps://doi.org/doi:10.7282/t3-r9rv-eb87
LanguageEnglish
CollectionSchool of Graduate Studies Electronic Theses and Dissertations
Organization NameRutgers, The State University of New Jersey
RightsThe author owns the copyright to this work.
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