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For closely related species living in similar habitats, differences in the acoustic morphology of vocalizations could play a role in mate recognition as well as provide insight into the evolutionary divergence between species. Przwewalski's horses (Equus Przwewalskii) and Mongolian domestic horses (Equus callabus) are sometimes found cohabiting in the same environment during the mating season. As...
Alarm calls given by adults and juveniles sometimes elicit different responses in receivers, with the alarm calls of adults being more provocative than those of juveniles. We examined this possibility in the domestic pig, Sus scrofa domesticus. We hypothesized that alarm barks given by adults and juveniles would differ acoustically, and that weaned juvenile pigs would respond more strongly to the...
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