Aspectos relacionados ao descarte de matrizes em granjas comerciais de suínos de Minas Gerais

• Ano de defesa: 2012
• Autor(a) principal: Costa, Aurea Helena Assis da
• Orientador(a): Costa, Eduardo Paulino da
• Banca de defesa: Veloso, Cristina Mattos
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Viçosa
• Programa de Pós-Graduação: Mestrado em Medicina Veterinária
• Departamento: Biotecnologia, diagnóstico e controle de doenças; Epidemiologia e controle de qualidade de prod. de
• País: BR
• Palavras-chave em Português: Suínos; Descarte de matrizes; Manejo reprodutivo
• Palavras-chave em Inglês: Swine; Discarding of sows; Reproductive Managements
• Área do conhecimento CNPq: CNPQ::CIENCIAS AGRARIAS::MEDICINA VETERINARIA::REPRODUCAO ANIMAL
• Link de acesso: http://locus.ufv.br/handle/123456789/5125

This study was carried out to evaluate the aspects related with discarding of sows in swine commercial farms in the State of Minas Gerais. A total of 29,568 events such as breeding, calvings, abortions and estrus repetitions among others, in four farms (A, B, C and D) located in the State of Minas Gerais. The biennia 2008-2009 and 2010-2011, whose data were stored in database of the management program PigChamp ® were evaluated. The annual discarding rates were high, as totalizing 55.10, 40.63, 56.12 and 43.44% in the first biennium and 58.37; 37.15; 42.18 and 48.32% in the second biennium, on farms A, B, C and D, respectively. The highest discarding rate in both biennia on farms A, B and D refers to sows without evident problems and presenting good production indexes, as totalizing 39.02, 13.02 and 17.77% in the first biennium and 40.00, 7.95 and 16.09% discarded animals in the second biennium, respectively. However, this condition occupied the second prominence position in Farm C during the first biennium. During this biennium, it was distinguished the total low average of piglets born (15.5%), as being 11.4% discarding rate of sows without obvious problems. In the second biennium, however, several disposal causes were higher than the one found for matrices presenting no evident problems (4.22%), such as abortion (18.67%), vulvar discharge (13.56%) and injuries (12.44%). The anestrus was not highlighted as reason for disposal in both two biennia under evaluation. Thus, the rates for this condition were: 0 and 1.07% in farm A; 0.15% and 0.76 in B; 1.70 and 0.22% in C and 0.0 and 1.73% in farm D, for both biennia under evaluation, respectively. Moreover, the repetition of the estrus as cause for discarding presented variable rates, as depending on the farm under evaluation. So, the rates for this condition were 1.40 and 0.27%; 10.50 and 11.93%; 8.28% and 3.56; 4.56 and 7.96% on farms A, B, C and D, in both biennia, respectively. Besides the causes for discarding previously related, other ones with variable incidence were also found among farms, given that they are dependent on general and reproductive managements of each herd. In all farms under evaluation, there were records on discarding causes that were not according to animal real condition. It is concluded that the high discarding rate observed in sows could be reduced, as taking into account that animals with excellent productivity indexes and without obvious problems are discarded. It is also concluded that, sometimes, the true cause for discarding is not properly recorded, as taking into account that the results are not subsequently used for making decision concerning to possible management corrections in the farm and better use of the stock sows.