Heterogeneous genetic cows of three genetic groups in feedlot system in the state of Pernambuco, Brazil - 10.4025/actascianimsci.v34i1.11306
| Autor: | Lúcia Helena de Albuquerque Brasil, Ivalda de Albuquerque Lima, Marcílio de Azevedo, Christiano Raphael de Albuquerque Borges, Marcelo de Andrade Ferreira |
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| Jazyk: | angličtina |
| Rok vydání: | 2011 |
| Předmět: | |
| Zdroj: | Acta Scientiarum: Animal Sciences, Vol 34, Iss 1, Pp 91-96 (2011) |
| Druh dokumentu: | article |
| ISSN: | 1806-2636 1807-8672 |
| Popis: | The behavior of 15 Girolando cows from three genetic groups (1/2, 5/8 and 3/4 HG) in feedlots was evaluated. Experimental design was completely randomized with 3 treatment (genetic groups) and 5 replicates. The animals were evaluated by the variables: food, rumination, rest, locomotion, water intake, demand and time in the shade, and other activities. Group 5/8 HG spent more time feeding (267.88 min.) than groups 3/4 HG (245.55 min.) and 1/2 HG (259.55 min.). Idle standing time was higher (204.66 min.) for 3/4 HG when compared to the other groups. There was no statistical difference for the duration of rest in the shade. Solar radiation and THI were the factors which most influenced the animals’ behavior. Results show that the genetic groups 5/8 and 3/4 HG had a higher sensitivity to heat than 1/2 HG |
| Databáze: | Directory of Open Access Journals |
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