Estudo do ganho de peso médio diário em vitelos das raças charolesa e limousine numa exploração de bovinos de carne
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2021
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A otimização da produtividade de explorações de bovinos de carne compreende a gestão de diversos fatores como a genética, a nutrição, a saúde e a fertilidade. A análise dos
índices produtivos ou zootécnicos de bovinos de carne trata-se de um tema muito importante em medicina veterinária, dada a crescente preocupação por parte dos produtores de maximizar a rentabilidade da exploração e por parte dos consumidores por minimizar o impacto ambiental da produção animal. A presente dissertação foi desenvolvida numa exploração de vacas de carne com o objetivo de comparar o ganho médio de peso diário (GMPD) dos vitelos das raças charolesa e limousine. O maneio dos animais das diferentes raças é semelhante em termos nutricionais
e profiláticos e apresentam a mesma localização geográfica. Os dados dos animais foram recolhidos da base de dados da exploração e foi feita uma análise estatística utilizando o programa SPSS.
O ganho médio de peso diário foi superior para animais da raça Charolesa em comparação com vitelos da raça Limousine. A ocorrência de doença mostrou ser um fator que afeta o ganho médio de peso diário e vitelos que apresentaram doença respiratória ou diarreia tiveram um ganho médio de peso diário inferior relativamente a vitelos saudáveis. Nesta exploração, vitelos que nasceram no Outono tiveram um ganho médio de peso diário superior quando comparados com vitelos nascidos na primavera. O ganho médio de peso diário de vitelos nascidos de vacas primíparas não mostrou grande diferença em relação a vitelos filhos de vacas multíparas. Não foi possível tirar nenhuma conclusão relativamente ao sexo do animal, que a em virtude de a variável não ter apresentado significância estatística.
Optimizing the productivity of beef cattle farms includes managing various factors such as genetics, nutrition, health and fertility. The analysis of the zoo technical indices of beef cattle is a very important subject in veterinary medicine given the growing concern on the part of producers to maximize the profitability of the farm and on the part of consumers to minimize the environmental impact of animal production. The present dissertation was developed in a beef cattle farm with the objective of comparing the average daily gain of calves of the Charolais and Limousin breeds. The management of the animals of the different breeds is similar in nutritional and prophylactic terms, and they are in the same geographical location. The animals' data were collected from the farm's database and a statistical analysis was performed using the SPSS program. The average daily gain was higher for Charolais breed animals compared to Limousin breed calves. The occurrence of disease was shown to be a factor affecting average daily gain, calves that had respiratory disease or diarrhea had a lower average daily gain compared to healthy calves. In this farm, calves that were born in autumn had a higher average daily gain when compared to calves born in spring. The average daily gain of calves born to primiparous cows did not show much difference compared to calves born to multiparous cows. It was not possible to draw any conclusion from the sex of the animal since the variable did not show statistical significance.
Optimizing the productivity of beef cattle farms includes managing various factors such as genetics, nutrition, health and fertility. The analysis of the zoo technical indices of beef cattle is a very important subject in veterinary medicine given the growing concern on the part of producers to maximize the profitability of the farm and on the part of consumers to minimize the environmental impact of animal production. The present dissertation was developed in a beef cattle farm with the objective of comparing the average daily gain of calves of the Charolais and Limousin breeds. The management of the animals of the different breeds is similar in nutritional and prophylactic terms, and they are in the same geographical location. The animals' data were collected from the farm's database and a statistical analysis was performed using the SPSS program. The average daily gain was higher for Charolais breed animals compared to Limousin breed calves. The occurrence of disease was shown to be a factor affecting average daily gain, calves that had respiratory disease or diarrhea had a lower average daily gain compared to healthy calves. In this farm, calves that were born in autumn had a higher average daily gain when compared to calves born in spring. The average daily gain of calves born to primiparous cows did not show much difference compared to calves born to multiparous cows. It was not possible to draw any conclusion from the sex of the animal since the variable did not show statistical significance.
Descrição
Orientação: João Cannas da Silva ; coorientação: João Paulo Reia Salgueiro Camejo
Palavras-chave
MESTRADO INTEGRADO EM MEDICINA VETERINÁRIA, MEDICINA VETERINÁRIA, VETERINÁRIA, ANIMAIS DE TALHO, PRODUTIVIDADE, PESO CORPORAL, VETERINARY MEDICINE, MEAT ANIMALS, PRODUCTIVITY, BODY WEIGHT, ZOOTECNIA, RAÇA CHAROLESA, RAÇA LIMOUSINE, ANIMAL SCIENCE, CHAROLAIS BREED, LIMOUSIN BREED