Time interval from ovulation to extrusion in female bullfrog in different photoperiods
It 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 hour...
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Sociedade Brasileira de Zootecnia
2011-08-01
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doaj-e09f2697d58b44b68defdcaeb7b60f6e2020-11-24T22:47:58ZengSociedade Brasileira de ZootecniaRevista Brasileira de Zootecnia1516-35981806-92902011-08-014081625162810.1590/S1516-35982011000800001Time interval from ovulation to extrusion in female bullfrog in different photoperiodsClaudio Angelo AgostinhoFrancisco Stefano WechslerCecilia Silva de CastroLucas Miyabara AgostinhoRaphaela Rezende RibeiroSueli Matiko Miyabara AgostinhoIt 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.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000800001artificial fertilizationcontrolled reproductionfertilization ratefrog reproductionLithobathes catesbeianusspawning |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Claudio Angelo Agostinho Francisco Stefano Wechsler Cecilia Silva de Castro Lucas Miyabara Agostinho Raphaela Rezende Ribeiro Sueli Matiko Miyabara Agostinho |
spellingShingle |
Claudio Angelo Agostinho Francisco Stefano Wechsler Cecilia Silva de Castro Lucas Miyabara Agostinho Raphaela Rezende Ribeiro Sueli Matiko Miyabara Agostinho Time interval from ovulation to extrusion in female bullfrog in different photoperiods Revista Brasileira de Zootecnia artificial fertilization controlled reproduction fertilization rate frog reproduction Lithobathes catesbeianus spawning |
author_facet |
Claudio Angelo Agostinho Francisco Stefano Wechsler Cecilia Silva de Castro Lucas Miyabara Agostinho Raphaela Rezende Ribeiro Sueli Matiko Miyabara Agostinho |
author_sort |
Claudio Angelo Agostinho |
title |
Time interval from ovulation to extrusion in female bullfrog in different photoperiods |
title_short |
Time interval from ovulation to extrusion in female bullfrog in different photoperiods |
title_full |
Time interval from ovulation to extrusion in female bullfrog in different photoperiods |
title_fullStr |
Time interval from ovulation to extrusion in female bullfrog in different photoperiods |
title_full_unstemmed |
Time interval from ovulation to extrusion in female bullfrog in different photoperiods |
title_sort |
time interval from ovulation to extrusion in female bullfrog in different photoperiods |
publisher |
Sociedade Brasileira de Zootecnia |
series |
Revista Brasileira de Zootecnia |
issn |
1516-3598 1806-9290 |
publishDate |
2011-08-01 |
description |
It 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. |
topic |
artificial fertilization controlled reproduction fertilization rate frog reproduction Lithobathes catesbeianus spawning |
url |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000800001 |
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