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dc.contributor.advisorWilson, James
dc.contributor.authorAdjei-Boateng, Daniel
dc.date.accessioned2017-01-18T09:55:50Z
dc.date.available2017-01-18T09:55:50Z
dc.date.issued2010
dc.identifier.citationDaniel Adjei-Boateng, 'The reproductive biology, population dynamics, production and fishery of the freshwater clam Galatea paradoxa (Born, 1778) in the Volta river, Ghana.', [thesis], Trinity College (Dublin, Ireland). Department of Zoology, 2010, pp 188
dc.identifier.otherTHESIS 9091
dc.identifier.urihttp://hdl.handle.net/2262/78797
dc.description.abstractThe reproductive biology, population dynamics and production of Galatea paradoxa (Bom 1778) (Donacidae) which is the basis of an artisanal fishery at the Volta River Estuary, Ghana, was studied from March 2008 to February 2010. Histological observation of the gonads revealed that G. paradoxa is gonochoristic with a dominance of females (80%) and a high incidence of hermaphrodites (9.4%). The reproductive cycle is annual with a single spawning event between July and October. Gametogenesis starts in December and progresses steadily to a peak in June-July when spawning begin until November when the animals are spent. Condition and gonadal indices showed a clear relationship with the gametogenic stages rising from minimum values in stage (I) at the start of gametogenesis to maximum values at stages (IIIA) ripe and (IIIB) start of spawning (June - August) before declining significantly to minimum values in stage (IV) spent.
dc.format1 volume
dc.language.isoen
dc.publisherTrinity College (Dublin, Ireland). Department of Zoology
dc.relation.isversionofhttp://stella.catalogue.tcd.ie/iii/encore/record/C__Rb14628691
dc.subjectZoology, Ph.D.
dc.subjectPh.D. Trinity College Dublin
dc.titleThe reproductive biology, population dynamics, production and fishery of the freshwater clam Galatea paradoxa (Born, 1778) in the Volta river, Ghana.
dc.typethesis
dc.type.supercollectionthesis_dissertations
dc.type.supercollectionrefereed_publications
dc.type.qualificationlevelDoctoral
dc.type.qualificationnameDoctor of Philosophy (Ph.D.)
dc.rights.ecaccessrightsopenAccess
dc.format.extentpaginationpp 188
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