Social rank during pre-pubertal development and reproductive performance of adult rams

Ungerfeld, Rodolfo; Lacuesta, Lorena

doi:10.1016/j.anireprosci.2010.05.007

Cited by 13 publications

(13 citation statements)

References 23 publications

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“…These results suggest that group penned ram lambs interacting with their pen mates initiate spermatogenesis at an earlier age, than in individually confined ram lambs (Belibassaki and Kouimtzis, 2000). Also Ungerfeld and Lacuesta (2010) reported that spermatogenesis did not develop efficiently in individually confined ram lambs compared with group confined lambs exposed to a ewe in oestrous. Other studies (Price et al, 1999;Orihuela, 2014) demonstrated that the heterosexual experience in this breed contributes to stimulate spermatogenesis already at an early Type of enclosure of rams on sexual traits age and can accelerate lamb production or outof-season breeding.…”

Section: Santos Et Almentioning

confidence: 74%

Changes in Sexual Behaviour and Semen Quality Associated with Age and Type of Enclosure of Saint Croix Rams in Different Seasons of the Year

Santos

Sánchez-Dávila

Vázquez-Armijo

et al. 2015

Italian Journal of Animal Science

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The objective of this study was to evaluate sexual behaviour and semen quality of St. Croix ram lambs bred in a semi-desert region. In Experiment 1, 24 yearling rams were assigned to two groups: T1 with 12 males confined for 11 months; T2 with 12 males confined individually for the same period of time. In Experiment 2, 20 four-month-old ram lambs were assigned to two groups of 10 animals each. In each experiment, sexual behaviour and semen quality were evaluated every 2 weeks over 11 months. In Experiment 1, rams that were individually confined showed better sexual activity than lambs confined together (P<0.05), whereas in Experiment 2 ram lambs confined individually only showed shorter time to first mount with ejaculation (P<0.05). In experiment 1, sperm with better progressive motility (P<0.05) was recorded per yearling ram confined individually (63.4±0.2%) in comparison with rams confined together (51.60.1%). In Experiment 2, ram lambs confined together showed better semen quality (P˂0.05). In both trials, an effect of the season was observed on both sexual behaviour and semen quality (P<0.05). In conclusion, this study of St. Croix males showed different sexual behaviours according to age and type of enclosure.

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Section: Santos Et Almentioning

confidence: 74%

Changes in Sexual Behaviour and Semen Quality Associated with Age and Type of Enclosure of Saint Croix Rams in Different Seasons of the Year

Santos

Sánchez-Dávila

Vázquez-Armijo

et al. 2015

Italian Journal of Animal Science

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“…The heavier lambs tend to have higher social rank, grow faster, gain more weight, and increase the testicular size, producing spermatozoa and sexual behavior earlier. However, nor the amount of sexual play, or prematurity puberty are related to the service capacity of the rams when adults (67,102) .…”

Section: Dominant Effectmentioning

confidence: 92%

“…On the other hand, the courtship in the rams may differ according to the social status that show when lambs, although there is no clear effects on other semen features (102) or sexual behavior. Actually, very few is known about the effects of the social rank in the reproductive development of prepubertal lambs.…”

Section: Dominant Effectmentioning

confidence: 98%

“…Los corderos más pesados, tienden a tener mayor rango social, crecen más rápido, ganan más peso, e incrementan el tamaño testicular, produciendo espermatozoides y conductas sexuales más precozmente. Sin embargo, ni la cantidad de juego sexual, ni la precocidad a la pubertad están relacionadas con la capacidad de servicio de los carneros cuando adultos (67,102) .…”

Section: Selection Of Sexual Companionunclassified

“…Por otro lado, el cortejo en los carneros puede diferir de acuerdo con el status social que muestran cuando corderos, aunque no existen efectos claros en otras conductas sexuales o características del semen (102) . En realidad, poco es lo que se sabe sobre los efectos del rango social en el desarrollo reproductivo prepuberal de los corderos.…”

Section: Selection Of Sexual Companionunclassified

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La conducta sexual del carnero. Revisión

Trujillo

2014

RMCP

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RESUMENEl presente trabajo tiene como objetivo recapitular la literatura disponible sobre factores que influyen en la conducta sexual del carnero. Incluye una descripción de los fundamentos endocrinos básicos, su manifestación en borregos ferales, así como una breve reseña de las conductas de cortejo y cópula. También abarca una descripción de aquellos efectos que tanto a nivel prenatal como durante la infancia pueden afectar la vida reproductiva del animal adulto, considerando prácticas de manejo tales como la separación por sexos al momento del destete, y los problemas posteriores de homosexualidad o inadecuda conducta sexual que pueden mostrar en su madurez. Además, se revisan aspectos de dominacia y fotoperiodo, y cómo estos pueden afectar el éxito reproductivo. Se describen aspectos relacionados con la selección del compañero de monta y colección del semen. Finalmente, se documentan algunas pruebas a corral, desarrolladas con el fin de determinar cuáles son los carneros que pueden tener mayor éxito reproductivo en condiciones de campo.PALABRAS CLAVE: Comportamiento reproductivo, Ovinos, Reproducción, Libido, Capacidad de servicio. ABSTRACTThe purpose of this manuscript is to summarize the literature regarding factors influencing rams' sexual behavior. It includes a description of: the fundamental endocrine basis of sexual behavior, its manifestation in feral sheep, a brief description of ram´s courting, and copulatory behaviors. It also describes how some prenatal and childhood conditions can impact reproductive performance in mature animals, in addition to management practices, such as separation by sexes at weaning, and the later problems of homosexuality or inadequate sexual behavior that might some rams develope. Furthermore, the effects of dominance and photoperiod, and their effect in the reproductive success, together with some aspects related to mate selection are also described. Some considerations during semen collection are stated as well, and finally, several useful tests that have been developed under pen conditions to determine which rams could be successful breeders in the field are illustrated.

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