Mother-offspring recognition via contact calls in cattle (Bos taurus)
Individual recognition in gregarious species is fundamental in order to avoid misdirected parental investment. In ungulates, two very different parental care strategies have been identified: “hider” offspring usually lie concealed in vegetation whereas offspring of “follower” species remain with their mothers while they forage. These two strategies have been suggested to impact on mother-offspring vocal recognition, with unidirectional recognition of the mother by offspring occurring in hiders and bidirectional recognition occurring in followers. In domestic cattle (Bos taurus), a facultative hider species, vocal communication and recognition has not been studied in detail under free-ranging conditions, where cows and calves can graze freely and where hiding behaviour can occur. We hypothesised that, as a hider species, cattle under these circumstances would display unidirectional vocal recognition. In order to test this hypothesis, we conducted playback experiments using mother-offspring contact calls. We found that cows were more likely to respond, by moving their ears and/or looking towards the speaker and directing their body or walking towards the loudspeaker, to calls of their own calves than to calls from other calves. Similarly, calves responded more rapidly, and were more likely to move their ears and/or look towards the speaker, direct their body or walk towards the loudspeaker, and to call back and/or meet their mothers, in response to calls from their own mothers than to calls from other females. Contrary to our predictions, our results suggest that mother-offspring vocal individual recognition is bidirectional in cattle. Additionally, mothers of younger calves tended to respond more strongly to playbacks than mothers of older calves. Therefore, mother responses to calf vocalisations are at least partially influenced by calf age.
AuthorsPadilla de la Torre, M; Briefer, EF; Ochocki, BM; MCELLIGOTT, AG; Reader, T
- College Publications