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Assessment of local abundance, demographics, health and exploitation of Chesapeake Bay American eel

dc.contributor.advisorWilberg, Michael Jen_US
dc.contributor.authorFenske, Kari Hammarstenen_US
dc.date.accessioned2009-10-06T06:38:52Z
dc.date.available2009-10-06T06:38:52Z
dc.date.issued2009en_US
dc.identifier.urihttp://hdl.handle.net/1903/9646
dc.description.abstractThe Chesapeake Bay supports the largest U.S. harvest of American eel <italic>Anguilla rostrata</italic>, yet little is known about the underlying production rates sustaining harvests. Demographic attributes were compared between six sub-estuaries and with an unexploited population in the Hudson River. A mark-recapture experiment in the Potomac River yielded growth, abundance, and production estimates. Sub-estuaries characterized by lower salinity had a lower proportion of females, and American eels were older, slower growing and showed increased parasitism. Female American eels were larger, older, and had higher growth rates than other gender types. Local abundances were 10-fold higher in the Potomac River estuary in comparison to the Hudson River, but growth rates were similar. Mortality rates were twice as high as those in the Hudson River estuary. The production model indicated American eel recruitment and biomass decreased substantially during the past 20 years.en_US
dc.format.extent878505 bytes
dc.format.mimetypeapplication/pdf
dc.language.isoen_US
dc.titleAssessment of local abundance, demographics, health and exploitation of Chesapeake Bay American eelen_US
dc.typeThesisen_US
dc.contributor.publisherDigital Repository at the University of Marylanden_US
dc.contributor.publisherUniversity of Maryland (College Park, Md.)en_US
dc.contributor.departmentMarine-Estuarine-Environmental Sciencesen_US
dc.subject.pqcontrolledAgriculture, Fisheries and Aquacultureen_US
dc.subject.pqcontrolledBiology, Zoologyen_US
dc.subject.pquncontrolledAmerican eelen_US
dc.subject.pquncontrolledanguilla rostrataen_US
dc.subject.pquncontrolledChesapeake Bayen_US
dc.subject.pquncontrolleddemographicsen_US
dc.subject.pquncontrolledproduction modelen_US
dc.subject.pquncontrolledrecruitmenten_US


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