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vol.35 issue5Genetic parameters for weights from birth to 550 days of age of Tabapuã cattle using random regression modelsUse of complementary tests to evaluate the freezing ability of semen from goats under artificial photoperiod exposure author indexsubject indexarticles search
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Revista Brasileira de Zootecnia

Print version ISSN 1516-3598On-line version ISSN 1806-9290

Abstract

SANTOS, Anselmo Domingos Ferreira et al. Reproductive aspects of male goats under an artificial photoperiod exposure. R. Bras. Zootec. [online]. 2006, vol.35, n.5, pp.1926-1933. ISSN 1516-3598.  http://dx.doi.org/10.1590/S1516-35982006000700007.

This study aimed to evaluate reproductive characteristics (sexual behavior, scrotal perimeter and quali-quantitative aspects of semen) of young and adults Alpine and Saanen male goats exposed to an artificial photoperiod (16 hours of light and 8 hours of darkness for 2 months). The young animals showed greater libido than the adults, based on the smallest time of reaction. Frequency of manifestation of the behavior traits varied between breeds and ages and higher intensity was observed on adult animals. Scrotal perimeter was smaller for Alpine goats than for Saanen goats at the same age. The scrotal perimeter increased from 30.53 cm in the first period (15 days after the end of the photoperiod exposure) to 31.53 cm in the second period (to the end of the experiment). Quality of semen of Alpine goats was better than that of Saanen goats at the same age. According to the reproductive traits evaluated, Alpine and Saanen goats exposed to similar conditions of this study are sensible to seasonal variation during the year.

Keywords : behavior; male goats; photoperiod; scrotal perimeter; semen.

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