Efeitos da sincronização de cios e IA por laparoscopia vs. monta natural num conjunto de rebanhos da raça Suffolk
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2019
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Atualmente, não existe muita informação sobre a exploração da raça Suffolk em
Portugal e, não sendo autóctone, há uma tentativa dos produtores de adaptação do animal
ao nosso clima, condições e métodos de exploração.
Neste estudo comparou-se a eficácia reprodutiva, com sincronização ou não de
cios, com recurso a dois métodos, a monta natural versus a inseminação por laparoscopia,
em ovinos da raça Suffolk. Este estudo foi feito observando as práticas de 13 explorações,
uma vez que não houve grupos experimentais feitos de propósito para esta dissertação.
Tendo em conta o procedimento é de notar que neste estudo o método com taxas
de fertilidade mais altas é a monta natural, sendo também economicamente o mais viável.
Adicionalmente, verificou-se que as taxas de fertilidade com sincronização atingem aos
100% e as sem sincronização os 94%.
Ainda assim, não é possível assumir que a laparoscopia tem resultados inferiores à
monta natural pois a amostragem não é igual em ambos os métodos e a sua finalidade
reprodutiva pode passar por melhoramento do núcleo genético do seu rebanho.
Desta forma, os índices zootécnicos obtidos são satisfatórios para a realidade local
mas a raça pode, sem dúvida, beneficiar de mais estudos de campo, com observação de
grupos experimentais com metodologia científica para sedimentar conhecimentos.
Nowadays, there is not much information about the development of the Suffolk breed in Portugal and, with it not being a native breed, there has been an attempt from the farmers to adapt these animals to the climate, conditions and management of the farm. In this study, the reproductive effectiveness, with or without heat synchronization, was compared using two methods: natural mount versus the insemination through laparoscopy on Suffolk sheep. This study was based on the observation of practices of 13 farms, since there were no purpose-made experimental groups for this dissertation. Having in mind the procedure, it stands out that, in this study, the method with highest fertility rates is the natural mount, also being the most economically viable option. Additionally, it was found that the fertility rates with synchronization have reached 100%, and the ones with no sync 94% Nervertheless, it is not possible to assume that the laparoscopy has lower results when comparing to the natural mount, because the sampling quantities are not equal on both methods and the reproductive purpose could go through the improving of the genetic core of the herd. In this way, the zootechnical indexes obtained are satisfying for the local reality, but the breed can, without a doubt, benefit from more case studies, with experimental group observations with scientific methods, in order to fortify the knowledge.
Nowadays, there is not much information about the development of the Suffolk breed in Portugal and, with it not being a native breed, there has been an attempt from the farmers to adapt these animals to the climate, conditions and management of the farm. In this study, the reproductive effectiveness, with or without heat synchronization, was compared using two methods: natural mount versus the insemination through laparoscopy on Suffolk sheep. This study was based on the observation of practices of 13 farms, since there were no purpose-made experimental groups for this dissertation. Having in mind the procedure, it stands out that, in this study, the method with highest fertility rates is the natural mount, also being the most economically viable option. Additionally, it was found that the fertility rates with synchronization have reached 100%, and the ones with no sync 94% Nervertheless, it is not possible to assume that the laparoscopy has lower results when comparing to the natural mount, because the sampling quantities are not equal on both methods and the reproductive purpose could go through the improving of the genetic core of the herd. In this way, the zootechnical indexes obtained are satisfying for the local reality, but the breed can, without a doubt, benefit from more case studies, with experimental group observations with scientific methods, in order to fortify the knowledge.
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Orientação: Sofia Van Harten
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MESTRADO INTEGRADO EM MEDICINA VETERINÁRIA, MEDICINA VETERINÁRIA, OVINOS, FERTILIDADE, LAPAROSCOPIA, VETERINARY MEDICINE, SHEEP, FERTILITY, LAPAROSCOPY