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1.
Anim. Reprod. ; 12(4): 890-898, oct.-dec.2015. graf, tab
Artigo em Inglês | VETINDEX | ID: vti-26287

Resumo

The availability of glycerol has increased because of the biofuels industry, and glycerol can have a significant effect on reproductive efficiency when used as an alternative energy source in animal feeds. The aim of this study was to investigate the effects of pre-mating oral drenching of glycerin on ovarian and fertility responses in goats. Sixty Anglonubian mixed-breed goats were submitted to estrus synchronization by CIDR-prostaglandin PGF2α treatment and mated. At CIDR removal, onset of estrus, and 24 h after estrus behavior, the animals received 150 ml of saline solution (control group, n = 20), 150 ml of glycerol (150 ml group, n = 20), or 300 ml of glycerol (300 ml group, n = 20). The administration of glycerin increased plasma glucose in the 300 ml group (P < 0.05) and the insulin concentration at 12 h after glycerin drenching in both treated groups. Goats from the 300 ml group showed a lower ovulation rate when compared to the control group (1.15 ± 0.08 vs. 0.89 ± 0.14; P < 0.05) but exhibited larger follicles at 48, 24, and 12 h prior to ovulation (P < 0.05). Administration of 300 ml of glycerol was also associated with a significant reduction in the pregnancy rate (80.00% vs. 38.89%; P < 0.05) and in pregnant animals it was associated with lower growth of embryonic vesicles (1.78 ± 0.07 mm/day vs. 1.31 ± 0.07 mm/day; P < 0.05) compared to the control treatment. Gestational losses in the 300 ml group occurred between mating and the 45th day of pregnancy. No differences were found for the reproductive parameters analyzed in the study between the 150 ml and control groups. In conclusion, the supplementation with glycerol before the mating did not appear to be a viable alternative to increase reproductive efficiency of adult does.(AU)


Assuntos
Animais , Feminino , Cabras/fisiologia , Glicerol/análogos & derivados , Glicerol/análise , Fator de Acasalamento/análise , Fator de Acasalamento/química , Suplementos Nutricionais/análise
2.
Anim. Reprod. (Online) ; 12(4): 890-898, oct.-dec.2015. graf, tab
Artigo em Inglês | VETINDEX | ID: biblio-1461185

Resumo

The availability of glycerol has increased because of the biofuels industry, and glycerol can have a significant effect on reproductive efficiency when used as an alternative energy source in animal feeds. The aim of this study was to investigate the effects of pre-mating oral drenching of glycerin on ovarian and fertility responses in goats. Sixty Anglonubian mixed-breed goats were submitted to estrus synchronization by CIDR-prostaglandin PGF2α treatment and mated. At CIDR removal, onset of estrus, and 24 h after estrus behavior, the animals received 150 ml of saline solution (control group, n = 20), 150 ml of glycerol (150 ml group, n = 20), or 300 ml of glycerol (300 ml group, n = 20). The administration of glycerin increased plasma glucose in the 300 ml group (P < 0.05) and the insulin concentration at 12 h after glycerin drenching in both treated groups. Goats from the 300 ml group showed a lower ovulation rate when compared to the control group (1.15 ± 0.08 vs. 0.89 ± 0.14; P < 0.05) but exhibited larger follicles at 48, 24, and 12 h prior to ovulation (P < 0.05). Administration of 300 ml of glycerol was also associated with a significant reduction in the pregnancy rate (80.00% vs. 38.89%; P < 0.05) and in pregnant animals it was associated with lower growth of embryonic vesicles (1.78 ± 0.07 mm/day vs. 1.31 ± 0.07 mm/day; P < 0.05) compared to the control treatment. Gestational losses in the 300 ml group occurred between mating and the 45th day of pregnancy. No differences were found for the reproductive parameters analyzed in the study between the 150 ml and control groups. In conclusion, the supplementation with glycerol before the mating did not appear to be a viable alternative to increase reproductive efficiency of adult does.


Assuntos
Feminino , Animais , Cabras/fisiologia , Fator de Acasalamento/análise , Fator de Acasalamento/química , Glicerol/análise , Glicerol/análogos & derivados , Suplementos Nutricionais/análise
3.
Arq. bras. med. vet. zootec ; 66(4): 1171-1178, 08/2014. tab, graf
Artigo em Português | VETINDEX | ID: vti-11099

Resumo

A expressão de RNAm para leptina, receptor de leptina (obRb), adiponectina, receptor de adiponectina (AdipoR1) e resistina foi avaliada por meio da técnica de PCR em tempo real, em tecidos ovariano, hipofisário, adiposo do omento e da região perirrenal, em ovelhas alimentadas sem farelo de mamona ou com farelo de mamona detoxificada durante 14 meses. O tipo de dieta não afetou os níveis de RNAm para leptina, obRb, adiponectina, AdipoR1 e resistina nos diferentes tecidos avaliados (P>0,05). Nos tecidos ovariano e hipofisário, não foi verificada a expressão da adiponecina e da resistina, respectivamente. Como consequência, pode-se concluir que o farelo de mamona detoxificada pode ser utilizado como fonte proteica na dieta de ovelhas, sem afetar a expressão do gene resistina e dos genes leptina e adiponectina, bem como de seus receptores.(AU)


The expression of leptin, leptin receptor (obRb), adiponectin, adiponectin receptor (AdipoR1) and resistin was assessed by real-time PCR technique in ovarian, pituitary, and the omental adipose perirenal tissue in sheep feed without castor meal or with detoxified castor meal. The type of diet did not affect mRNA levels for leptin, obRb, adiponectin, resistin AdipoR1 evaluated in different tissues (P>0.05). However, in pituitary and ovarian tissues there was no expression of resistin and adiponectin, respectively. The detoxified castor meal can be used in sheep diets as alternative food protein without affecting the expression of leptin and adponectin as well as their receptors and resistin.(AU)


Assuntos
Animais , Ovinos/metabolismo , Receptores de Adipocina/análise , Receptores para Leptina/análise , Resistina/análise , Reprodução/fisiologia , Reação em Cadeia da Polimerase/veterinária , Ração Animal , Ricinus
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