Brazilian Journal of Veterinary Research and Animal Science; Vol. 52 Núm. 3 (2015); 234-248 Brazilian Journal of Veterinary Research and Animal Science; Vol. 52 No. 3 (2015); 234-248 Brazilian Journal of Veterinary Research and Animal Science; v. 52 n. 3 (2015); 234-248 Brazilian Journal of Veterinary Research and Animal Science; V. 52 N. 3 (2015); 234-248 Brazilian Journal of Veterinary Research and Animal Science Faculdade de Medicina Veterinária e Zootecnia da Universidade de São Paulo (FMVZ-USP) instacron:USP