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Effect of immunocastration on behaviour and blood parameters (cortisol and testosterone) of Holstein bulls

dc.creatorBolado-Sarabia, José L.
dc.creatorPérez-Linares, Cristina
dc.creatorFigueroa-Saavedra, Fernando
dc.creatorTamayo-Sosa, Alma R.
dc.creatorBarreras-Serrano, Alberto
dc.creatorSánchez-López, Eduardo
dc.creatorGarcía-Reynoso, Issa C.
dc.creatorRíos-Rincón, Francisco G.
dc.creatorRodríguez-Poché, Mabel Y.
dc.creatorGarcía-Vega, Luis A.
dc.creatorGallegos, Esteban
dc.creatorCastro-Osuna, Priscila
dc.date2018-05-24
dc.date.accessioned2020-07-14T19:03:38Z
dc.date.available2020-07-14T19:03:38Z
dc.identifierhttp://revistas.uach.cl/index.php/australjvs/article/view/1800
dc.identifier10.4067/S0719-81322018000200077
dc.identifier.urihttps://revistaschilenas.uchile.cl/handle/2250/143678
dc.descriptiono evaluate the effect that immunocastration has on behaviour, testosterone and cortisol levels of feedlot Holstein bulls, 720 intact animals aged between 7 and 8 months, weighing 232±1.19 kg were randomly assigned to two treatments: immunocastration using the Bopriva vaccine and a placebo (360 animals per treatment). The bulls were slaughtered at day 239 of treatment. Animals were vaccinated on days 1, 21, 101, and 181, and on those same days testosterone levels were measured; while cortisol, glucose and creatin kinase measurements were done on day 181 and during exanguination at slaughter. Sexual, aggressive and social behaviours were evaluated and it was found that intact bulls showed a higher average of head butts, mounting, threats, flehmen sign and sniffing (P<0.05), no differences were found for vocalisations, lowering of the head and grooming (P>0.05). Testosterone levels in intact bulls remained at 0.47ng/mL throughout the study, however, by day 181 differences (P<0.05) were observed in immunised bulls, with values of 0.22ng/mL. At slaughter, testosterone levels were 0.21 ± 0.06 ng/mL in immunocastrated bulls and 0.54 ± 0.06 ng/mL in the placebo group. The use of immunocastration with Bopriva has shown to be effective to reduce testosterone, sexual and aggressive behaviours on Holstein bulls.en-US
dc.descriptionTo evaluate the effect that immunocastration has on behaviour, testosterone and cortisol levels of feedlot Holstein bulls, 720 intact animals aged between 7 and 8 months, weighing 232±1.19 kg were randomly assigned to two treatments: immunocastration using the Bopriva vaccine and a placebo (360 animals per treatment). The bulls were slaughtered at day 239 of treatment. Animals were vaccinated on days 1, 21, 101, and 181, and on those same days testosterone levels were measured; while cortisol, glucose and creatin kinase measurements were done on day 181 and during exanguination at slaughter. Sexual, aggressive and social behaviours were evaluated and it was found that intact bulls showed a higher average of head butts, mounting, threats, flehmen sign and sniffing (P<0.05), no differences were found for vocalisations, lowering of the head and grooming (P>0.05). Testosterone levels in intact bulls remained at 0.47ng/mL throughout the study, however, by day 181 differences (P<0.05) were observed in immunised bulls, with values of 0.22ng/mL. At slaughter, testosterone levels were 0.21 ± 0.06 ng/mL in immunocastrated bulls and 0.54 ± 0.06 ng/mL in the placebo group. The use of immunocastration with Bopriva has shown to be effective to reduce testosterone, sexual and aggressive behaviours on Holstein bulls.es-ES
dc.formatapplication/pdf
dc.languageeng
dc.publisherFacultad de Ciencias Veterinarias - Universidad Austral de Chilees-ES
dc.relationhttp://revistas.uach.cl/index.php/australjvs/article/view/1800/2398
dc.rightsDerechos de autor 2018 Austral Journal of Veterinary Scienceses-ES
dc.sourceAustral Journal of Veterinary Sciences; Vol. 50 Núm. 2 (2018); 75-81en-US
dc.sourceAustral Journal of Veterinary Sciences; Vol. 50 Núm. 2 (2018); 75-81es-ES
dc.source0719-8132
dc.source0719-8000
dc.titleEffect of immunocastration on behaviour and blood parameters (cortisol and testosterone) of Holstein bullsen-US
dc.titleEffect of immunocastration on behaviour and blood parameters (cortisol and testosterone) of Holstein bullses-ES
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:eu-repo/semantics/publishedVersion


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