dc.contributorUniversidade Estadual Paulista (Unesp)
dc.contributorCuesta Aquicultura
dc.date.accessioned2013-09-30T20:12:28Z
dc.date.accessioned2014-05-20T13:41:08Z
dc.date.accessioned2022-10-05T13:59:13Z
dc.date.available2013-09-30T20:12:28Z
dc.date.available2014-05-20T13:41:08Z
dc.date.available2022-10-05T13:59:13Z
dc.date.created2013-09-30T20:12:28Z
dc.date.created2014-05-20T13:41:08Z
dc.date.issued2011-08-01
dc.identifierRevista Brasileira de Zootecnia. Sociedade Brasileira de Zootecnia, v. 40, n. 8, p. 1625-1628, 2011.
dc.identifier1516-3598
dc.identifierhttp://hdl.handle.net/11449/14256
dc.identifier10.1590/S1516-35982011000800001
dc.identifierS1516-35982011000800001
dc.identifierWOS:000297416500001
dc.identifierS1516-35982011000800001.pdf
dc.identifier2772751144347110
dc.identifier0000-0003-0355-0553
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/3889624
dc.description.abstractIt was analyzed in this work the influence of photoperiod on time interval from ovulation induction period to extrusion of ovocits in female bullfrogs (Lithobates catesbeianus). It was used 54 females reared from metamorphosis to 9 months of age under three photoperiods: dark time (DL 0:24), 16 hours of daylight (DL 16:8) and 12 hours of daylight (DL 12:12). Ovulation was induced by intramuscular application of two doses of LHRHa with 12 hours of interval between the injections. After 10, 25, 28, 31, 34 and 37 hours from the first hormone injection, 10-gram samples (3,000 eggs) were extracted from each female at each time interval and fertilized. Egg hatching rate was checked in each sample 72 hours after fertilization. Analysis of variance showed a significant effect of extrusion delay and the interaction between photoperiod and this delay. Extrusion should be carried out 33, 24 and 26 hours after the first hormone dosage in females reared in environments without light, with 12 hours of daylight and with 16 hours of daylight, respectively, to obtain the maximum fertilization rate.
dc.languageeng
dc.publisherSociedade Brasileira de Zootecnia
dc.relationRevista Brasileira de Zootecnia
dc.relation0,337
dc.rightsAcesso aberto
dc.sourceSciELO
dc.subjectartificial fertilization
dc.subjectcontrolled reproduction
dc.subjectfertilization rate
dc.subjectfrog reproduction
dc.subjectLithobathes catesbeianus
dc.subjectspawning
dc.titleTime interval from ovulation to extrusion in female bullfrog in different photoperiods
dc.typeArtigo


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