Avaliação da eficiência reprodutiva em vacadas de linha pura limousine do concelho de Odemira
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2016
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Com a alteração das regras à concessão de apoios sobre a forma de pagamento anual
de prémios à vaca em aleitamento com entrada em vigor a 23 de Outubro de 2014, todas as
vacas que não produzirem pelo menos um vitelo num período de 540 dias (18 meses), deixam
de ser elegíveis a prémio, o que se reflecte numa perda para o criador que ronda os 200 euros
por vaca não elegível.
O presente estudo teve como objectivo principal avaliar a eficiência reprodutiva em
vacadas de linha pura Limousine em regime extensivo, utilizando como Indicador
fundamental o Intervalo entre Partos (IEP) e estipulando-se como hipótese que as explorações
analisadas apresentam um IEP médio inferior a 540 dias. Num plano secundário, procurou-se
caracterizar de uma forma geral as explorações da região em estudo, ou seja do concelho de
Odemira.
O período avaliado em estudo abrangeu cinco anos, entre dia 1 de Janeiro de 2010 e o
dia 31 de Dezembro de 2014. Utilizou-se uma amostra de 423 vacas pertencentes a 20
explorações, tendo ocorrido 1504 partos, dos quais resultaram 1523 vitelos.
A selecção da amostra realizou-se pela imposição dos seguintes critérios: Fêmeas de
linha pura Limousine inscritas na Associação de Criadores Limousine (doravante referida
como ACL), em actividade reprodutiva no período em estudo e residentes no concelho de
Odemira. Excluíram-se os animais que morreram, os que foram abatidos e os que transitaram
para fora do concelho durante o período em estudo.
A informação para o estudo foi obtida em duas fontes, nomeadamente a partir de uma
base de dados disponibilizada pela ACL e pela execução de inquéritos vocacionados para o
criador.
Conclui-se com este estudo que o IEP da amostra analisada se situa nos 399,7 dias,
bastante abaixo da hipótese colocada mas ainda acima do objectivo ideal de 1 vitelo/vaca/ano,
o que significa que ainda existe margem para melhorias no maneio praticados nestas
explorações, dado o potencial genético da raça Limousine.
Dado o panorama actual relativamente às novas regras de atribuição de prémio por
vaca em aleitamento, conclui-se ainda que as explorações analisadas não serão prejudicadas
de forma substancial, já que respeitam, em média, o objectivo imposto de um IEP ≤ 540 dias.
By changing the rules for granting aid on the form of an annual prize for the beef cattle industry, entered into force on October 23rd of 2014, all the cows that do not produce at least one calf in a 540 days period (18 months ), cease to be eligible for prize, which is reflected in a loss to the producer of around 200 euros per cow ineligible. This study's main objective was to evaluate the reproductive efficiency in pure bred Limousine herds in extensive, using as a key indicator the Calving Interval (IEP) and stipulating the hypothesis that the analyzed farms have an average IEP of less than 540 days. The secondary objective was to characterize the farms presented in this study in a general view. The period assessed in this study covered five years between January 1st 2010 and December 31st 2014. It used a sample of 423 cows in a total of 20 farms, having occurred 1504 births, of which resulted in 1523 calves. The selection of the sample was held by the imposition of the following criteria: pure breed Limousine females registered at the Portugal Limousine Breeders Association (ACL), in reproductive activity during the study period and residing in Odemira county. The animals that have died, have been slaughtered or transited out of the county during the period under study were excluded. The data for the study was obtained from two sources, namely from a database provided by the ACL and the implementation of surveys aimed for the creator. It is concluded from this study that the average IEP analyzed from the sample stands at 399.7 days, well below the suggested hypothesis but still above the ideal target of 1 calf/cow/year, which means that there is still room for improvement in the management practiced in these farms, given the genetic potential of Limousine breed in general. Given the current outlook on the new rules for allocating the anual prize for lactating cows, it is also possible to conclude that the analyzed farms will not be substantially affected, since the objective imposed of an IEP ≤ 540 days is ensured.
By changing the rules for granting aid on the form of an annual prize for the beef cattle industry, entered into force on October 23rd of 2014, all the cows that do not produce at least one calf in a 540 days period (18 months ), cease to be eligible for prize, which is reflected in a loss to the producer of around 200 euros per cow ineligible. This study's main objective was to evaluate the reproductive efficiency in pure bred Limousine herds in extensive, using as a key indicator the Calving Interval (IEP) and stipulating the hypothesis that the analyzed farms have an average IEP of less than 540 days. The secondary objective was to characterize the farms presented in this study in a general view. The period assessed in this study covered five years between January 1st 2010 and December 31st 2014. It used a sample of 423 cows in a total of 20 farms, having occurred 1504 births, of which resulted in 1523 calves. The selection of the sample was held by the imposition of the following criteria: pure breed Limousine females registered at the Portugal Limousine Breeders Association (ACL), in reproductive activity during the study period and residing in Odemira county. The animals that have died, have been slaughtered or transited out of the county during the period under study were excluded. The data for the study was obtained from two sources, namely from a database provided by the ACL and the implementation of surveys aimed for the creator. It is concluded from this study that the average IEP analyzed from the sample stands at 399.7 days, well below the suggested hypothesis but still above the ideal target of 1 calf/cow/year, which means that there is still room for improvement in the management practiced in these farms, given the genetic potential of Limousine breed in general. Given the current outlook on the new rules for allocating the anual prize for lactating cows, it is also possible to conclude that the analyzed farms will not be substantially affected, since the objective imposed of an IEP ≤ 540 days is ensured.
Descrição
Orientação : João Ribeiro Lima ;
co-orientação : João Paisana
Palavras-chave
MESTRADO INTEGRADO EM MEDICINA VETERINÁRIA, VETERINÁRIA, GADO LEITEIRO, BOVÍDEOS, REPRODUÇÃO ANIMAL, PORTUGAL, ODEMIRA, DAIRY CATTLE, BOVIDS, ANIMAL BREEDING, PORTUGAL, ODEMIRA, MEDICINA VETERINÁRIA, VETERINARY MEDICINE