Artículos de revistas
Comportamento alimentar de vacas Nelore e de seus bezerros puros ou mestiços
Fecha
2016-01-01Registro en:
Arquivo Brasileiro de Medicina Veterinaria e Zootecnia, v. 68, n. 3, p. 596-604, 2016.
1678-4162
0102-0935
10.1590/1678-4162-7991
S0102-09352016000300596
2-s2.0-84977544193
S0102-09352016000300596.pdf
Autor
Universidade Estadual Paulista (Unesp)
Universidade Federal de Mato Grosso do Sul (UFMS)
Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA)
Institución
Resumen
The aim of this study was to evaluate the effect of a calf's genetic group on the behavior of dam and calf. We used 24 Nellore dams and their calves, of which eight were Nellore, eight were Simmental Nelore and eight Red Angus Nellore. Grazing and rumination times, as well as suckling frequency and time, were measured. The straight bred calves suckled more often than the crossbreds (3.51 vs. 3.17 times/day), but their suckling lasted less time (7.37 vs 7.80 minutes). Suckling frequency, suckling length and total time spent suckling decreased as calf age increased. Calf grazing and rumination time increased with age; however, the cows' grazing time increased and rumination time decreased as the days postpartum went by. The crossbred calves grazed, on average, 18 minutes longer than the crossbreds, and the males grazed 16 minutes longer than the females. The male calves grazed, at 40 days of age, 25 minutes longer than the females, but this difference decreased as they grew and disappeared around 220 days. In conclusion, dam and calf behavior are influenced by the calf's genetic group.