ICHTHYOPLANKTON COMMUNITY STRUCTURE AND FEEDING ECOLOGY IN THE PATUXENT RIVER ESTUARINE TRANSITION ZONE

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dc.contributor.advisorHoude, Edward D.en_US
dc.contributor.authorCampfield, Patrick Anthonyen_US
dc.contributor.departmentMarine-Estuarine-Environmental Sciencesen_US
dc.contributor.publisherDigital Repository at the University of Marylanden_US
dc.contributor.publisherUniversity of Maryland (College Park, Md.)en_US
dc.date.accessioned2004-08-27T05:25:02Z
dc.date.available2004-08-27T05:25:02Z
dc.date.issued2004-08-02en_US
dc.description.abstractSurveys were conducted during spring-early summer of 2000 and 2001 to investigate the spatiotemporal structure of ichthyoplankton assemblages, including hatchery-released American shad <i>Alosa<i> <i>sapidissima<i>, and feeding of larval fishes in the Patuxent River, Chesapeake Bay. Ichthyoplankton, zooplankton, and hydrographic data were collected across the Patuxent's estuarine transition zone, including the salt front and Estuarine Turbidity Maximum region. Recaptured American shad larvae cohort mortality (<i>M<i> = 0.20 to 3.01d<sup>-1</sup>) and growth (<i>G<i> = -1.28 to 0.87 mmd<sup>-1</sup>), low dispersal (±0.4kmd<sup>-1</sup>), and feeding habits similar to co-occurring species, suggest that the best production will result from larval shad releases upriver of the salt front in early to mid-May. Two ichthyoplankton assemblages were distinguished: 1) riverine characterized by anadromous species and 2) estuarine characterized by naked goby <i>Gobiosoma<i> <i>bosc<i>. Temperature, dissolved oxygen, salinity-associated variables (e.g., salt-front location), and the larval prey <i>Bosmina<i> <i>longirostris<i> (Cladocera) concentrations were indicators of larval abundance. Abundance, taxonomic diversity, and dietary overlap and potential for competition among larval taxa were highest within and up-estuary of the salt front of the estuarine transition zone.en_US
dc.format.extent2899429 bytes
dc.format.mimetypeapplication/pdf
dc.identifier.urihttp://hdl.handle.net/1903/1751
dc.language.isoen_US
dc.subject.pqcontrolledEnvironmental Sciencesen_US
dc.subject.pqcontrolledBiology, Oceanographyen_US
dc.subject.pqcontrolledBiology, Ecologyen_US
dc.subject.pquncontrolledichthyoplankton assemblagesen_US
dc.subject.pquncontrolledPatuxent Riveren_US
dc.subject.pquncontrolledfish larvaeen_US
dc.subject.pquncontrolledAmerican shaden_US
dc.subject.pquncontrolledlarval foragingen_US
dc.subject.pquncontrolledestuarine transition zoneen_US
dc.titleICHTHYOPLANKTON COMMUNITY STRUCTURE AND FEEDING ECOLOGY IN THE PATUXENT RIVER ESTUARINE TRANSITION ZONEen_US
dc.typeThesisen_US

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