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Research article - Peer-reviewed, 2013

The presence of black vultures at the calving sites and its effects on cows' and calves' behaviour immediately following parturition

Toledo, L.M.; Paranhos da Costa, Mateus; Schmidek, A.; Jung, Jens; Ciryllo, J.N.S.G.; Cromberg, V.U.

Abstract

Black vultures (Coragyps atratus) are often present near calving sites, and under this situation they may play a positive role by removing animal carcasses and afterbirth or a negative role by attacking neonate calves or disturbing cow-calf behaviours following parturition. Cow-calf behaviour was recorded over a 4-year study period from a total of 300 births involving 200 Nellore, 54 Guzerat, 20 Gyr and 26 Caracu cows. The calving site in relation to the location of the herd, considering cow-calf pairs within, close or distant to the herd, the presence of vultures and the behaviour of cows and calves were recorded instantaneously, at 5-min interval. On average, vultures were present at 80% of the calving sites. The frequency of vultures present at calving sites was dependent on the years for the Nellore herd, increasing from 1998 to 2003. When vultures were present, the time that the cow was in contact with its calf decreased, and the percentage of time that the cow was standing still increased. Vultures were observed pecking cows and their neonates during 34.1% of all recordings. However, in only two cases pecking injuries were actually observed on calves that were noted to be very weak. The preliminary results suggest that although black vultures cannot be characterized as a predator of neonate calves, they sometimes attack neonate calves and their presence near the calving sites alter the behaviours of cows and calves.

Keywords

cattle; birth; first suckling; black vulture; coragyps atratus

Published in

Animal
2013, Volume: 7, number: 3, pages: 469-475
Publisher: CAMBRIDGE UNIV PRESS

    UKÄ Subject classification

    Agricultural Science

    Publication identifier

    DOI: https://doi.org/10.1017/S1751731112001735

    Permanent link to this page (URI)

    https://res.slu.se/id/publ/42549