Influência do corte de cauda e limagem de dentes na performance de leitões nascidos com menos de um quilo
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Data
2021
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Resumo
Nas últimas décadas tem-se registado um aumento do número de leitões nascidos por
ninhada. Aliado a este aumento veio, também, um acréscimo da percentagem de leitões de
baixo peso ao nascimento (BPN). Estes leitões BPN têm menores hipóteses de sobrevivência
comparativamente a leitões nascidos com mais de um quilograma. Neste sentido, e como é
rotineiro nas explorações executar-se o corte de cauda e limagem de dentes nos primeiros dias
de vida dos leitões, pensou-se que abolir estas práticas nos leitões BPN poderia ser uma ajuda
na sua performance, assim como poderia aumentar a sua taxa de sobrevivência. Posto isto,
selecionaram-se os dois leitões mais leves das ninhadas (ambos <1kg); ao mais leve do par
não era cortada cauda nem limados dentes, mas efetuavam-se esses procedimentos ao leitão
mais pesado do par. Avaliou-se a performance dos leitões, como unidades independentes
(n=95), em função do peso ao registo, idade ao desmame, paridade, duração da gestação,
características da ninhada (nº de nados totais, nº nados vivos, nº nados mumificados, nº
adotados/retirados, nº nados mortos), género e execução ou não de corte de cauda e limagem
de dentes. Os resultados obtidos mostraram que o peso ao registo (p=0,021) e o número de
nados mumificados (p=0,008) influenciaram a performance dos leitões em estudo. Não se
provou neste ensaio que o corte de cauda e limagem de dentes, assim como as restantes
variáveis testadas, tivessem influência significativa na performance de leitões BPN.
In the last decades there has been an increase in the number of piglets born per litter. In addition to this increase, there was also an enlargement in the percentage of low birth weight (LBW) piglets. These LBW piglets have less chance of survival compared to piglets born with more than one kilogram. In this sense, and as it is routine in farms to perform tail docking and teeth griding in the first days of piglets life, it was thought that abolishing these practices in LBW piglets could be an aid in their performance, as well as it could increase the survival rate. That being said, the two lighter piglets of the litters (both <1kg) were selected; at the lightest of the pair, neither tail or teeth were docked or teeth grinded, but these procedures were carried out on the heaviest piglet in the pair. The performance of the piglets was evaluated as independent units (n=95), depending on the weight at processing, age at weaning, sow parity, duration of gestation, characteristics of the litter (number of total births, number of live births, number of mummified foetus, number of adopted/removed, number of stillbirths), gender and depending on whether they were tail docked and their teeth grinded. The results obtained showed that the weight at record (p = 0.021) and the number of mummified foetus (p = 0.008) influenced the performance of the piglets. It was not proven in the trial that the tail docking and teeth grinding, as well as the other variables tested, had a significant influence on the performance of LBW piglets.
In the last decades there has been an increase in the number of piglets born per litter. In addition to this increase, there was also an enlargement in the percentage of low birth weight (LBW) piglets. These LBW piglets have less chance of survival compared to piglets born with more than one kilogram. In this sense, and as it is routine in farms to perform tail docking and teeth griding in the first days of piglets life, it was thought that abolishing these practices in LBW piglets could be an aid in their performance, as well as it could increase the survival rate. That being said, the two lighter piglets of the litters (both <1kg) were selected; at the lightest of the pair, neither tail or teeth were docked or teeth grinded, but these procedures were carried out on the heaviest piglet in the pair. The performance of the piglets was evaluated as independent units (n=95), depending on the weight at processing, age at weaning, sow parity, duration of gestation, characteristics of the litter (number of total births, number of live births, number of mummified foetus, number of adopted/removed, number of stillbirths), gender and depending on whether they were tail docked and their teeth grinded. The results obtained showed that the weight at record (p = 0.021) and the number of mummified foetus (p = 0.008) influenced the performance of the piglets. It was not proven in the trial that the tail docking and teeth grinding, as well as the other variables tested, had a significant influence on the performance of LBW piglets.
Descrição
Orientação: Sofia van Harten ; coorientação: Pedro Lopes
Palavras-chave
MESTRADO INTEGRADO EM MEDICINA VETERINÁRIA, MEDICINA VETERINÁRIA, VETERINÁRIA, SUÍNOS, VETERINARY MEDICINE, SWINE, LIMAGEM DE DENTES, CORTE DE CAUDA, TEETH GRINDING, TAIL DOCKING