STUDIES ON REPRODUCTIVE BIOLOGY AND ENDOCRINOLOGY IN A PRIMITIVE TELEOSTEI, THE AMERICAN SHAD (Alosa sapidissima)

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dc.contributor.advisorZohar, Yonathanen_US
dc.contributor.authorAbraham, Eytanen_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.accessioned2004-08-27T05:20:31Z
dc.date.available2004-08-27T05:20:31Z
dc.date.issued2004-07-07en_US
dc.description.abstractAmerican shad is an anadromous fish that displays asynchronous ovarian development. In an effort to enhance our understanding of the reproductive cycle of this primitive Teleostei species, and provide better management tools for the Chesapeake fishery, we have conducted studies of its gonadal and hormonal cycles. We developed various assays to measure reproductive endocrine factors including: 17,20b-dihydroxy-4-pregnen-3-one (DHP) and GnRH. Fish were collected from the Susquehanna River during their spawning migration. One group of fish was sacrificed on site to assess reproductive parameters of wild shad. A second group was transported to a Maryland State hatchery and treated with gonadotropin-releasing hormone agonist (GnRHa) using several delivery systems. These treatments were followed during a two-week period by measurement of various hormonal levels. In addition, fecundity and fertilization of the hatchery groups were measured daily. Our results shed light on the reproductive physiology and endocrinology of the American shad and lay the foundation for usage of GnRHa to induce shad spawning in captivity.en_US
dc.format.extent3155779 bytes
dc.format.mimetypeapplication/pdf
dc.identifier.urihttp://hdl.handle.net/1903/1725
dc.language.isoen_US
dc.subject.pqcontrolledBiology, Molecularen_US
dc.subject.pqcontrolledAgriculture, Fisheries and Aquacultureen_US
dc.subject.pquncontrolledShaden_US
dc.subject.pquncontrolledGnRHen_US
dc.subject.pquncontrolledHatcheryen_US
dc.subject.pquncontrolledImplantsen_US
dc.titleSTUDIES ON REPRODUCTIVE BIOLOGY AND ENDOCRINOLOGY IN A PRIMITIVE TELEOSTEI, THE AMERICAN SHAD (Alosa sapidissima)en_US
dc.typeThesisen_US

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