Evaluation of the breeding behavior of Brazilian Pony stallions

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• 作者：Miguel Alejandro Silva Rua ; ^{miguelvet-rua@hotmail.com" class="auth_mail" title="E-mail the corresponding author} ; ^{miguelalejandro22rua@gmail.com" class="auth_mail" title="E-mail the corresponding author} ; Celia Raquel Quirino ; Aylton Bartholazzi Junior ; Paula Nascimento Santoro ; Rosemary Bastos ; Mariana da Silva Ribeiro ; Luis Fonseca Matos ; Wilder Hernando Ortiz Vega
• 关键词：Horse ; Pony ; Reproduction ; Behavior
• 刊名：Animal Reproduction Science
• 出版年：2016
• 出版时间：September 2016
• 年：2016
• 卷：172
• 期：Complete
• 页码：137-142
• 全文大小：282 K

文摘

The aim of this study was to evaluate the breeding behavior of Brazilian Pony stallions during semen collection to examine the effect of age category (AC) and month of evaluation on the characteristics of breeding behavior. Nine stallions were evaluated during the breeding and non-breeding season, 5–8 (AC1) and 9–13 years (AC2) of age. The variables evaluated were reaction time (RT), mount time one (MT1) and two (MT2), mount and ejaculation time (MEjT), mounting without erection (MWEr), mounting without ejaculation (MWEj), flehmen, kicks, bites, smells, vocalizations and serum testosterone concentration. Analyses of variance and correlation were performed. The average scores were RT: 56.2 ± 92.9 s, MT1: 115.0 ± 122.4 s, MT2: 196.4 ± 160.7 s, MEjT: 21.8 ± 3.2 s, MWEr: 0.8 ± 1.3 s, MWEj: 2.1 ± 3.5 s, flehmen: 3.8 ± 3.0 s, kicks: 0.3 ± 1.2 s, bites: 1.0 ± 2.0 s, smells: 5.7 ± 3.5 s, vocalizations: 6.4 ± 6.3 s and testosterone: 0.89 ± 0.52 ng/mL. The AC affected the RT (P < 0.05) but not the other traits. Month of evaluation did not affect most variables (P > 0.05). The correlations between age and RT and between age and MT1 and MT2 were significant. The correlation between testosterone and MEjT was moderate and negative. The breeding behavior of Brazilian Pony stallions was similar across different months of evaluation and different age categories. The month of evaluation and age category also did not affect testosterone concentrations, meaning that semen collection is feasible throughout the year.