Influ?ncia de Infesta??es Parasit?rias nos ?ndices Zoot?cnicos de Bovinos Leiteiros de Diferentes Grupamentos Gen?ticos.

The dairy cattle is an activity of great value of agricultural sector and perform important function in economic and social development of Brazil. Of health and zootechnical viewpoint, milk production is full of challenges, it is necessary studies to correlate various factors that may constitute lim...

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Access type:openAccess
Publication Date:2009
Main Author: Brito, Guilherme Rodrigues lattes
Advisor: Sanavria, Argemiro lattes
Document type: Master thesis
Language:por
Published: Universidade Federal Rural do Rio de Janeiro
Program: Curso de P?s-Gradua??o em Ci?ncias Veterin?rias
Department: Parasitologia Veterin?ria
Portuguese subjects:
English subjects:
Knowledgement areas:
Online Access:https://tede.ufrrj.br/jspui/handle/tede/782
Citation:BRITO, Guilherme Rodrigues. Influence of parasitic infestation in the indexes for dairy cattle of different genetic groups.. 2009. 39 f. Disserta??o (Mestrado em Parasitologia Veterin?ria) - Universidade Federal Rural do Rio de Janeiro, Serop?dica, 2009.
Portuguese abstract:A bovinocultura leiteira ? uma atividade de grande valor do setor agropecu?rio e desempenha fun??o relevante no desenvolvimento econ?mico e social do Brasil. Do ponto de vista sanit?rio e zoot?cnico, a produ??o de leite ? repleta de desafios, sendo necess?rios estudos que visem correlacionar os diversos fatores que podem constituir em obst?culos ao crescimento do setor leiteiro. A pesquisa objetivou correlacionar sete vari?veis: a produ??o de leite, as infesta??es parasit?rias por Haematobia irritans, Rhipicephalus (Boophilus) microplus e larvas de Dermatobia hominis; o escore da condi??o corporal, o grupamento gen?tico e a ordem de parto em f?meas Holandesas Mesti?as pertencentes ? Empresa de Pesquisa Agropecu?ria do Estado do Rio de Janeiro - Esta??o Experimental de Serop?dica - RJ. Foram utilizados 58 animais lactantes Holand?s x Zebu no per?odo de novembro de 2007 a outubro de 2008. As pesagens das produ??es de leite, as contagens de ectoparasitos e a avalia??o dos escores da condi??o corporal foram realizadas a cada sete dias. O grupamento gen?tico e a ordem de parto foram obtidos a partir dos arquivos da Empresa. Para a an?lise estat?stica dos dados procedeu-se a correla??o de Pearson (P < 0,05) e an?lise multivariada utilizando-se a t?cnica dos componentes principais. Foi observada correla??o positiva entre a produ??o de leite e n?mero de moscas, produ??o de leite e n?mero de bernes e produ??o de leite e ordem de parto dos animais. A vari?vel escore da condi??o corporal apresentou correla??o negativa com o n?mero de carrapatos e correla??o positiva com as vari?veis grupamento gen?tico e ordem de parto. Verificou-se correla??o positiva entre o n?mero de moscas e a ordem de parto dos animais. Entre as vari?veis n?mero de carrapatos e grupamento gen?tico foi observada correla??o negativa. O emprego da An?lise Multifatorial utilizando os componentes principais F1 e F2 confirmou as correla??es de Pearson permitindo uma apropriada interpreta??o dos resultados.
English abstract:The dairy cattle is an activity of great value of agricultural sector and perform important function in economic and social development of Brazil. Of health and zootechnical viewpoint, milk production is full of challenges, it is necessary studies to correlate various factors that may constitute limits to growth in dairy sector. The research aimed to correlate seven variables: the milk s production, the parasitic infestation by Haematobia irritans, Rhipicephalus (Boophilus) microplus and larvae of Dermatobia hominis; the body condition score, the genetic group and order of birth in mixed race Holstein female, belonging to the Company for Agricultural Research of Rio de Janeiro State - Experimental Station of Serop?dica - RJ. Were used 58 lactating animals Holstein x Zebu between november 2007 to october 2008. The weights of production of milk, the counts of ectoparasites and evaluate of body condition scores were taken every seven days. The genetic group and order of birth were obtained from files of Company. For statistical analysis of data, was proceed the Pearson Correlation (P <0.05) and multivariate analysis using the technique of principal components. We observed a positive correlation between milk production and number of flies, milk production and number of Dermatobia larvae and milk production and order of birth of animals. The variable of body condition score had negative correlation with number of ticks and positive correlation with the genetic group and order of birth. There was positive correlation between the number of flies and order of birth of animals. Among the variables number of ticks and genetic group the correlation was negative. The application of multifactorial analysis using the principal components F1 and F2 confirmed the Pearson correlations allowing a proper interpretation of results.