Lack of sexual experience does not reduce the responses of LH, estrus or fertility in anestrous goats exposed to sexually active males

Fernández, Ilda G.; Luna-Orozco, Juan Ramón; Vielma, Jesús; Duarte, Gerardo; Hernández, H.; Flores, Jerónimo Landeros; Gelez, Hélène; Delgadillo, J.A.

doi:10.1016/j.yhbeh.2011.07.016

Cited by 14 publications

(13 citation statements)

References 25 publications

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“…experienced photo-stimulated males (Fern andez et al 2011;Bedos et al 2012;Loya-Carrera et al 2014). The present results differ from those reported in sheep, since young rams with lower sexual experience induced lower proportions of ovulations than adults (61 and 78 %, respectively; Ungerfeld et al 2008).…”

Section: Discussionmentioning

confidence: 99%

“…In males, photoperiodic treatment increases the testosterone secretion, odour, and sexual behaviour during March and April, months that are considered a part of their sexual rest season (Delgadillo et al 2002;Bedos et al 2012). When sexually experienced photo-stimulated males are exposed to anoestrous goats, they can successfully induce LH secretion followed by oestrous behaviour and ovulation (Fern andez et al 2011;Mart ınez-Alfaro et al 2014). The hypothesis in the present study state that if sexually inexperienced males are photo-stimulated, they could improve their sexual behaviour and display high level of nudging, ano-genital sniffing, mounting attempts, and mounts with intromission, and induce sexual response in anoestrous female goats.…”

Section: Introductionmentioning

confidence: 99%

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Absence of previous sexual experience did not modify the response of anoestrous goats to photo-stimulated bucks in Spring

Fernández

Medina

Flores

et al. 2017

Italian Journal of Animal Science

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Sexually inexperienced rams display lower frequency of nudging, ano-genital sniffing, mounting attempts, and mounts with intromission than experienced ones. Experienced photo-stimulated males display high level of sexual behaviour. The aim of this study was to determine: i) whether sexually inexperienced photo-stimulated males display similar sexual behaviour as the experienced ones, and ii) whether these inexperienced bucks can stimulate sexual response in anoestrous goats, as the experienced ones. Sexually inexperienced and experienced photo-stimulated males (n ¼ 5 each) were used. In April, two groups of anovulatory females (n ¼ 50 each) were exposed to these males for 15 d. Male sexual behaviour was registered for three days, upon their introduction into female groups. On day 1, the inexperienced males displayed higher nudging than the experienced ones (p < .001), whereas on days 2 and 3, the experienced males displayed higher nudging than the inexperienced ones (p < .001). The ano-genital sniffing, mounting attempts, and mounts with intromission did not differ between the inexperienced and experienced groups (p > .05). The proportion of females ovulating did not differ between the two groups (!82 %; p ¼ 1.0). Pregnancy rate (!68 %; p ¼ .829) did not differ between the females exposed to inexperienced or experienced males. It is concluded that sexually inexperienced photo-stimulated males show similar sexual behaviour as the experienced ones, and they are able to induce sexual response in seasonally anoestrous goats through the male effect. ARTICLE HISTORY

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Absence of previous sexual experience did not modify the response of anoestrous goats to photo-stimulated bucks in Spring

Fernández

Medina

Flores

et al. 2017

Italian Journal of Animal Science

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“…Resultado semelhante foi reportado em cabras adultas durante e fora da época reprodutiva (MELLADO; HERNANDÉZ, 1996). Estes resultados também confirmam que o contato prévio com o macho não é fundamental para a resposta ao efeito do macho ativo ou fêmea androgenizada (LUNA-OROZCO et al, 2007;FERNÁNDEZ et al, 2011).…”

Section: Grupo Macho Grupo Fêmea Grupo Controleunclassified

“…Deste modo, nossos resultados se assemelham a de outros autores usando o efeito macho para estimular a ciclicidade de cabras adultas, cabritas pós-pubere e novilhas (MELLADO; HERNANDÉZ, 1996;RIVAS-MUÑOZ, et al, 2007;LUNA-OROZCO et al, 2008;FERNÁNDEZ et al, 2011;FIOL;QUINTANS;UNGERFELD, 2010). …”

Section: Grupo Macho Grupo Fêmea Grupo Controleunclassified

“…Essa variação na duração de ciclos entre fêmeas submetidas a diferentes formas de efeito macho não foi reportada em trabalhos anteriores realizados com cabras adultas, cabritas pós-pubere e novilhas (MELLADO; HERNANDÉZ, 1996;RIVAS-MUÑOZ, et al, 2007;LUNA-OROZCO et al, 2008;FERNÁNDEZ et al, 2011;FIOL;QUINTANS;UNGERFELD, 2010 A descoberta do papel das kisspeptinas no desenvolvimento das características sexuais secundárias e maturação do eixo reprodutivo Estes dados, confirmam a sincronização dos primeiros cios no período reprodutivo específico da espécie em determinada região geográfica (SUNDERLAND et al, 1995;. Expressão de Kiss1, Kiss1R, ERα, ERβ e PR ___________________________________________________________________________…”

Section: Grupo Machounclassified

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Desenvolvimento reprodutivo de cabritas Saanen submetidas ao efeito macho no período peri-púbere

Augusto¹

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AGRADECIMENTOSAo CNPq-Brasil, MCT-Moçambique e a UEM-Moçambique por terem tornado possível o programa de doutorado que deu origem a presente tese. À Seção de Cooperação Internacional da FZEA pelo apoio prestado na legalização da minha estada do Brasil.Ao Prof. Dr. João Alberto Negrão pelo acolhimento, sábia orientação e apoio na execução do programa.Aos colegas do laboratório Alice Deléo Rodrigues, Ana Paula Rodrigues Gaiato, e Gabriela Facholi Bomfim pela agradável convivência e ajuda durante a realização do experimento. Aos colegas Augustin Silva, Atanásio Serafim Vidane, Fábio Sergio Cury, Carmen Garrine e Lizbeth Paucar pela contribuição na coleta de amostras.As técnicas do Laboratório de Fisiologia Animal -FZEA/USP Sandra Aparecida de Oliveira e Giovana Krempel Merighe pela contribuição nas análises laboratoriais, ao técnico do laboratório de histologia Nilton Pedro dos Santos pela ajuda na coleta e identificação histológica dos órgãos e ao técnico do biotério António Fernandes dos Santos pela ajuda no manejo dos animais. À Carmen Garrine e as filhas pela calorosa recepção, amizade e companheirismo ao longo dos três anos de convivência em Pirassununga; à Renata Conti e a família pela amizade, apoio e agradável convivência durante a minha permanência em Pirassununga. À Alice Deléo Rodrigues, Lizbeth Paucar, Carolina Yumi, Orfa Paucar e Rosa Zimba pela convivência e amizade.Enfim, a todos que de uma maneira ou de outra contribuíram na execução deste projeto. Male effect, major social factor associated to reproduction, is mainly used to stimulate cyclic activity during anestrus period in seasonal breeder species.There are references to the influence of male effect on puberty where it can advance the age at which puberty occurs. The present project aimed to study the effect of exposure of peri-pubertal Saanen goat kids to the male effect on Sexual maturation, in particular, estrus associated behaviors, estrogen and progesterone profiles and expression of kiss1 gene, kisspeptin receptor, estradiol receptor and progesterone receptor in the hypothalamus, pituitary and ovary. In the first experiment, 29 Saanen kids with 142,72 ± 10,61 days of age and 24,9 ± 4,26 kg weight were randomly assigned to three treatments namely: 1) exposure to active male (male group), 2) exposure to androgenized female (female group) and 3) control (control group). Daily observation to record estrus associated behaviors and weekly blood collections for estradiol and progesterone levels determination were made from May to October. Animals subjected to the male effect (active male or female) registered more estrus associated behavior than the control group. Social interaction had effect on tail position, vulva aspect, vocalization and mounts acceptance. There were significant differences among groups on estradiol levels. The male group registered higher estradiol concentrations than the control group. There was interaction group*collection on progesterone concentrations. Animals from the female group had significantly higher progesterone m...

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Using Socio-Sexual Stimulations for Sustainable Goat Production Under Subtropical Latitudes

Delgadillo

Chemineau

Keller

2017

Sustainable Goat Production in Adverse Environments: Volume I

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Lack of sexual experience does not reduce the responses of LH, estrus or fertility in anestrous goats exposed to sexually active males

Cited by 14 publications

References 25 publications

Absence of previous sexual experience did not modify the response of anoestrous goats to photo-stimulated bucks in Spring

Absence of previous sexual experience did not modify the response of anoestrous goats to photo-stimulated bucks in Spring

Desenvolvimento reprodutivo de cabritas Saanen submetidas ao efeito macho no período peri-púbere

Using Socio-Sexual Stimulations for Sustainable Goat Production Under Subtropical Latitudes

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