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Seasonal and circadian variation of the sexual behavior of Morada Nova rams in tropical environment

Severino Guilherme Caetano Gonçalves dos Santos et al · Sociedade Brasileira de Zootecnia · 2015

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The objective of this study was to evaluate the seasonal and daily variation in sexual behavior of Morada Nova breeders raised in the Brazilian semi-arid region. The data were collected from four rams and 114 ewes of the Morada Nova breed - 55 females in the dry season and another 59 in the rainy season. Observations were performed in the dry and rainy seasons, divided into four times of the day: morning (05:01 h to 11.00 h), afternoon (11.01 h to 17.00 h), evening (17.01 h to 23:00 h), and dawn (23:01 h to 05.00 h). Sexual behavior was assessed for a period of 24 h/day, in a breeding season. One ram was used each three days. The behavioral patterns of the rams in view of females were observed during the recognition (sniffing the female urine, bouts of anogenital sniffing, and flehmen reaction), preparatory (exposure of tongue and penis, leg-kicking, and low-pitched bleats), and copulatory (number of mounts, number of ejaculations, and refractory period) phases. The rams were more active during daytime. The animals in the rainy season showed more efficient sexual behaviors by the lower frequency of mounts per ejaculation and greater number of ejaculations in a shorter time. In contrast, courting behaviors such as exposure of tongue, number of mounts, low-pitched bleats, and leg-kicking were more frequent in the dry season. In the semi-arid region with latitudes close to 7°N, Morada Nova rams have a higher intensity of precopulatory behaviors and lower frequency of ejaculations in the dry season.

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APA 7

al, S. G. C. G. D. S. E. (2015). Seasonal and circadian variation of the sexual behavior of Morada Nova rams in tropical environment. https://doi.org/10.1590/S1806-92902015000100002

MLA

al, Severino Guilherme Caetano Gonçalves dos Santos et. "Seasonal and circadian variation of the sexual behavior of Morada Nova rams in tropical environment." 2015. https://doi.org/10.1590/S1806-92902015000100002.

Chicago

al, Severino Guilherme Caetano Gonçalves dos Santos et. 2015. "Seasonal and circadian variation of the sexual behavior of Morada Nova rams in tropical environment.". https://doi.org/10.1590/S1806-92902015000100002.

Harvard

al, S. G. C. G. D. S. E. 2015, Seasonal and circadian variation of the sexual behavior of Morada Nova rams in tropical environment, Sociedade Brasileira de Zootecnia, available at: https://doi.org/10.1590/S1806-92902015000100002 [Accessed 30 Jun. 2026].

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Título
Seasonal and circadian variation of the sexual behavior of Morada Nova rams in tropical environment
Autor / colaboradores
Severino Guilherme Caetano Gonçalves dos Santos et al
Editorial
Sociedade Brasileira de Zootecnia
Año de publicación
2015
ISSN
1806-9290
ISSN
1806-9290
Idioma
eng

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