The study was conducted at the UFSM with the purpose to verity the differences of behavior between 12 bovine (Polled Hereford) and 12 bubaline (Mediterranean) long - yearling steers. The feedlot area was partialy covered and the animals were distributed in 8 pens with 50m² (three animals per pen), were they had free access to water, food and mineral mixture. The access to the feeding trough was 90cm/animal. The roughage (fresh chopped sugar cane or com silage) constituted 70% of the dry matter offered and the remaining of the diet was completed with concentrate. Food was provided twice daily, ad libitum. The steers were identified with ink numbers and observed during 4 periods of 24h, in August. The observations were made from a 6m high tower, with 5 minutes intervals. The interaction between species and source of roughage was significant (P < 0.05) for the time that animals remained laying down or standing during the 24 hours, and for the time that animals were ruminating while they were laying down in the diurnal period. The time that animals spent eating was similar (P > 0.05) for the two species (21.7 for the bovino and 20.1 % for the bubaline). In leisure, the bovino remained during 40.7% of the time, against 44.3% for the bubaline (P < 0.05). The time that animals spent ruminating was similar (P > 0.05) for bovine (35.3%) and bubaline (34.2%). In average the two species drank water four times during the 24 hours period. On the trough with salt + bone meal mixture the bovine spent 0.8% of the time and the bubaline 0.3% (P < 0.001). The source of roughage did not affect the main activities.
behavior; bovine; bubaline; feedlot; sugar cane; corn silage
