Evaluation of the breeding behavior of Brazilian Pony stallions

Rua, Miguel Alejandro Silva; Quirino, C. R.; Bartholazzi, Aylton; Santoro, Paula Nascimento; Bastos, Rosemary; Ribeiro, Mariana da Silva; Matos, Luis Fonseca; Vega, Wilder Hernando Ortiz

doi:10.1016/j.anireprosci.2016.07.011

Cited by 3 publications

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“…The study was conducted during the breeding season (BS) (December, March, April) and during the nonbreeding season (NBS) (May, August and September). In the north of Rio de Janeiro State, Brazil, the BS occurs in spring and summer from October to April and the nBS occurs in fall and winter from May to September (RUA et al, 2016). During the experimental period, the stallions were maintained in an individual boxes with 3 x 4 m bedded with straws.…”

Section: Introductionmentioning

confidence: 99%

Biometric testicular and serum testosterone concentration of Brazilian Ponies stallions

Rua

Quirino

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et al. 2017

Rev. bras. saúde prod. anim.

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SUMMARYEvaluation of the testis size is very important in stallions' selection, since it is an indirect determinant of their reproductive potential. The aim of this study was to evaluate the biometric testicular traits, calculate the volume testicular and analyze the serum testosterone concentration of the stallion. During six months were measured the tests of adults Brazilian Ponies stallions from northern of Rio de Janeiro State, Brazil. The length, the width and the height of the testicles (TL, TW and TH) were measured. From these measurements, the total testicular volume (TTV) was calculated. The serum testosterone concentration was also evaluated. The data were studied by analysis of variance and were calculated the correlations among the traits. The average of the testis biometry were TL 5.8 ± 0.6 cm; TW 3.8 ± 0.5 cm; TH 4.7 ± 0.4 cm and 111.2 ± 27.7 for TTV. Mean of serum testosterone concentration was 0.89 ± 0.52 ng/dl. High correlations between biometry testicular traits with testicular volume were observed and low to moderate correlations were observed for testicular traits, testosterone and sperm output. The testis size could be an important trait that assists to the prediction of stallion's reproductive potential of the Brazilian ponies stallions. It is suggested that there would be no fluctuation in serum testosterone concentration in Brazilian ponies stallions that coult afect on its fertility.Keywords: andrology, horse, reproduction RESUMOAvaliação do tamanho dos testículos é muito importante na seleção de garanhões, uma vez que é um determinante indireto do seu potencial reprodutivo. O objetivo deste estudo foi avaliar as características de biometria testiculares, calcular o volume testicular e analisar a concentração sérica de testosterona de garanhões. Durante seis meses, foram medidos os testículos de garanhões Pôneis da raça Brasileiro adultos, criados no Norte do Estado do Rio de Janeiro, Brasil. O comprimento a largura e a altura dos testículo (TL, TW e TH) foram mensurados. A partir dessas medidas, calculou-se o volume testicular total (TTV). Os dados foram avaliados por análise de variância e foram calculadas as correlações entre as características. A média geral das características de biometria testicular e volume testicular foram: TL 5,8 ± 0,6 cm; TW 3,8 ± 0,5 cm; TH 4,7 ± 0,4 cm e TTV 111.2 ± 27,7. A média de concentração sérica de testosterona foi de 0,89 ± 0,52 ng/dl. Altas correlações foram observadas entre as características de biometria testicular e volume testicular. Baixas a médias correlações entre as características testiculares com produção espermática e com concentração de testosterona foram observadas. O tamanho testicular pode ser uma importante característica que auxilia na predição do potencial reprodutivo do garanhão pôneis da raça Brasileira. Sugere-se que não há variações na concentração sérica de testosterona nos pôneis da raça Brasileira que poderia afetar em sua fertilidade. Palavras-chave: andrologia, equino, reproduçãoRev.

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Section: Introductionmentioning

confidence: 99%

Biometric testicular and serum testosterone concentration of Brazilian Ponies stallions

Rua

Quirino

Veja

et al. 2017

Rev. bras. saúde prod. anim.

Self Cite

View full text Add to dashboard Cite

show abstract

“…There was a general lack of difference in libido between the seasons, and all stallions showed good libido, classified as 4 to 5, better than the libido scores reported for stallions of other breeds (Melo et al, 1998;Rua et al, 2015Rua et al, , 2016Sereno, 2002).…”

Section: Discussionmentioning

confidence: 66%

“…We can suggest that those animals suffered from the environmental conditions. Rua et al (2016) reported that thermal stress with higher temperatures during breeding season (summer) can impair the libido of stallions, with longer time to mount and ejaculate, compared with the period with cooler temperatures in winter. The same might have occurred with the two Pantaneiro stallions.…”

Section: Discussionmentioning

confidence: 99%