Biometria corporal em vacas de corte
The bovine females in Brazil are composed from zebu blood. Thus, these females are by excellence maternal breeds. To the crossbreeding is interesting to work with paternal races to mate those cows. In this way the São Marcos composite has in its base two European races, the Angus and the Marchigiana...
| Autor principal: | Silva, Caroline Martinatte da |
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| Formato: | Trabalho de Conclusão de Curso (Graduação) |
| Idioma: | Português |
| Publicado em: |
Universidade Tecnológica Federal do Paraná
2020
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| Assuntos: | |
| Acesso em linha: |
http://repositorio.utfpr.edu.br/jspui/handle/1/11351 |
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| Resumo: |
The bovine females in Brazil are composed from zebu blood. Thus, these females are by excellence maternal breeds. To the crossbreeding is interesting to work with paternal races to mate those cows. In this way the São Marcos composite has in its base two European races, the Angus and the Marchigiana, both with paternal profile. The efficiency of the animals has much to do with the size. The animal biometry can be a tool for analysis and to create parameters of maternal and paternal breeds. The present study was conducted at São Marcos Farm, located in Dois Vizinhos – PR - Brazil, with the objective to evaluate and compare the body measurements of three groups of cows: 19 of São Marcos composite (SM; ½ Marchigiana + ½ Aberdeen Angus), 10 zebu (Z) and 10 half blood (SM50; 1/2 composite + 1/2 zebu), all aged over four years. The measures evaluated were: body score (ECC), live weight, thoracic circumference (CT), length of rump (CG), width of rump (LG), length of the head (CCA) and head width (LCA), body length (CC), body height (H) and volume (VOL). The tools used were: measuring tape, trunk of containment, rope and balance. There was a difference in weight between the cows, being 524.4 kg for SM, for 469.4 Kg for SM50 and 412,5 kg for Z. High correlations were observed between ECC with the weight (0.70), CT (0.68) and with the VOL (0.62) and between the weight with CT (0.86) and LG (0.67). Interestingly, the measure of body volume (VOL), as proposed in this work of original form, showed high correlation with weight (0.87), CT (0.92) and with CC (0.67). It is concluded that the biometric measurements, in general, are very equivalent between the cows of the São Marcos composite, half blood and zebu. Biometry is an important tool in the evaluation of beef cattle and should be further studied and used in bovine breeding programs. |
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