Effects of sexual experience, season, and mating stimuli on endocrine concentrations in the adult ram

Borg, Kurt E.; Esbenshade, K. L.; Johnson, Blake; Lunstra, D. D.; Ford, J. J.

doi:10.1016/0018-506x(92)90034-s

Cited by 45 publications

(27 citation statements)

References 25 publications

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“…In agreement with this study, it was observed that AC bucks had significantly higher serum testosterone levels in comparison with IA bucks (Table 1 and Figure 1) and AC bucks tended to have shorter RT than IA bucks (3.5 vs 5.5 min) (P = 0.095). Previous studies reported that the reduction in RT with increase in testosterone concentrations (Kishk, 2008;Karaca et al, 2015) and elevated testosterone concentrations (Borg et al, 1992) tended to be associated with courtship behaviors.…”

Section: Discussionmentioning

confidence: 99%

“…Ford et al (2009) demonstrated that there was significant correlation between scrotal circumference and RT in bucks, whereas no significant correlations were present between TC and sexual performance test traits in the present study (Table 3). Previous studies reported that there were significant correlations between testosterone concentration and copulating behavior, such as nM with no ejaculation (r = 0.77) (Mahmoud, 2013), RT (r = -0.54) (Karaca et al, 2015), and courtship behavior, such as naso-genital investigation (Borg et al, 1992). Mellado et al (2000) reported that bucks lost 574 g/day under range conditions during the mating season.…”

Section: Discussionmentioning

confidence: 99%

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Relationships between physiological and behavioral responses of goat bucks in mating season

et al. 2016

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-The objective of this study was to determine the sexual parameters in young bucks with different sexual activity and the effect of experience (age) on sexual parameters in bucks. Fifteen young, sexually inexperienced (SI) and five adult, sexually experienced (SE) Saanen × Hair goat crossbred bucks were used in this study. Bucks were individually exposed to three estrus does for 15-min periods during four sexual performance tests, which were carried out every other day to determine some sexual behavior traits such as flehmen response, reaction time, and ejaculation efficiency. Sexually inexperienced young bucks were evaluated based on their sexual activity (active (AC) vs inactive (IA)) and presence of horn. It was found that AC bucks had significantly higher serum testosterone concentrations (31.5 vs 21.5 ng/mL) and weight loss (114.2 vs 51.2 g/day) than IA bucks. In addition, weight loss was significantly correlated with ejaculation efficiency in young bucks. On the other hand, horned bucks tended to have higher ejaculation efficiency with significantly longer reaction time than polled bucks. For experience (age) classes, SE bucks had higher testosterone concentration (76.0 vs 31.5 ng/mL) and weight loss (16.7 vs 8.6%) than SI active young bucks. However, the effect of experience on other sexual performance traits was found to be limited. Overall, these results indicate that testosterone concentration may affect sexual performance of young bucks in the mating season. Age-related sexual experience is not a determining factor for sexual performance in bucks. However, sexual performance data alone may not reflect reproductive outcomes without semen data.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Relationships between physiological and behavioral responses of goat bucks in mating season

et al. 2016

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“…Mientras que la norepinefrina ha demostrado tanto efectos estimulatorios como inhibitorios en la cópula (24) . Además de la época del año, la respuesta endocrina se ve afectada también por el tiempo de exposición ante las hembras y la experiencia del carnero, por lo que no es de sorprender que Borg (25) observara respuestas endocrinas más consistentes en animales con experiencia sexual, con un acceso restringido a las hembras, y durante la temporada reproductiva.…”

Section: Endocrine Regulation Of Neural and Reproductive Activityunclassified

“…While the norepinephrine has demonstrated both effects, inhibitory and stimulatory during intercourse (24) . In addition to the time of year, the endocrine response is affected also by the exposure time to females and the experience of the ram, so it is no surprise that Borg (25) observed more consistent endocrine responses with sexual experienced rams, with restricted access to females, and during the breeding season.…”

Section: Endocrine Regulation Of Neural and Reproductive Activitymentioning

confidence: 99%

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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“…Also, it has been demonstrated that sexual experience alters the sexual behavior in male rats (Agmo 1976;Taylor et al 1983;Agmo and Picker 1989;Mitchell and Stewart 1989;Borg et al 1992;Pfaus and Wilkins 1995). Sexual experience facilitates sexual orientation of male rats and reduces or eliminates impairments in sexual behavior after placement in a strange environment (Taylor et al 1983;Vega-Matuszczyk et al 1994;Pfaus and Wilkins 1995).…”

Section: Introductionmentioning

confidence: 98%

The effect of hetero- and homosexual experience and long-term treatment with fluoxetine on homosexual behavior in male rats

et al. 2006

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Effects of sexual experience, season, and mating stimuli on endocrine concentrations in the adult ram

Cited by 45 publications

References 25 publications

Relationships between physiological and behavioral responses of goat bucks in mating season

Relationships between physiological and behavioral responses of goat bucks in mating season

La conducta sexual del carnero. Revisión

The effect of hetero- and homosexual experience and long-term treatment with fluoxetine on homosexual behavior in male rats

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