Temperature and photoperiod induced maturation of southern flounder

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dc.acquisition-srcen_US
dc.call-noSH 328 .M35 no. 154 GBAYen_US
dc.contract-noPWD report 3400-283en_US
dc.contributor.authorHenderson-Arzapalo, A.en_US
dc.contributor.authorCloura, R.L.en_US
dc.contributor.authorMaciorowski, A.F.en_US
dc.contributor.otheren_US
dc.date.accessioned2010-02-15T16:51:35Z
dc.date.available2010-02-15T16:51:35Z
dc.date.issued1988en_US
dc.degreeen_US
dc.description18 pgs.en_US
dc.description-otheren_US
dc.description.abstractSouthern flounder (Paralichthys lethostigma) were maintained either in a 9500-L or 2300-L recirculating tank system from October 1983-March 1986 and subjected to controlled photoperiod and temperature conditioning to induce spawning. The fish were first subjected to a 6-month regime to delay natural spawning until spring (1984) followed by 6-month and 4-month regimes to induce either early fall (1984) or late summer (1985) spawning. Regardless of the conditioning regime, female gonadal development and egg release occurred only during December-February when water temperature was 18C and photoperiod maintained at 9-h light: 15-h dark. Male spermatogenesis coincided with female ovarian development but they did not fertilize eggs. The number of eggs released ranged from 66 to 28,900. Injection of 125 g LHRHa/fish failed to induce male courtship and fertilization. Strip-spawning attempts were also unsuccessful because eggs could not be manually extruded despite the presence of hydrated ova within the ovaries.en_US
dc.description.urihttp://gbic.tamug.edu/request.htmen_US
dc.geo-codeNOrthwestern Gulf of Mexicoen_US
dc.history10/14/04 easen_US
dc.identifier.urihttp://hdl.handle.net/1969.3/19404
dc.latitudeen_US
dc.locationGBIC Circulating Collectionen_US
dc.longitudeen_US
dc.notesen_US
dc.placeAustin, TXen_US
dc.publisherTexas Parks and Wildlife Department, Coastal Fisheries Branchen_US
dc.relation.ispartofseries1641.00en_US
dc.relation.urien_US
dc.scaleen_US
dc.seriesManagement Data Series No. 154en_US
dc.subjectsouthern flounderen_US
dc.subjectParalichthys lethostigmaen_US
dc.subjectspawningen_US
dc.subjectphotoperiodicityen_US
dc.subjecttemperature effectsen_US
dc.subjectanimal reproductive organsen_US
dc.subjectsex ratioen_US
dc.titleTemperature and photoperiod induced maturation of southern flounderen_US
dc.typeBooken_US
dc.universityen_US
dc.vol-issueNo. 154en_US

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