Why a variety of social animals vocalize during agonistic foraging interactions remains *** possibility is that these signals advertise the signaller's competitive ability,playing a role in the defence of food res...
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Why a variety of social animals vocalize during agonistic foraging interactions remains *** possibility is that these signals advertise the signaller's competitive ability,playing a role in the defence of food resources,yet there is limited evidence in support of this ***,we used adult female Asian particoloured bats,Vespertilio sinensis,to test whether individual variation in competitive ability when foraging can be explained by aggressive *** synchronized infrared video and audio recording,we monitored bat aggressive vocalizations,dominance rank and weight gain in triads under controlled food ***,subsequent playbacks,consisting of experimental stimuli,echolocation pulses and silence,were presented to feeding bats in a *** showed that females uttered low frequency calls composed of one to five syllable types during feeding *** rates of aggressive vocalizations increased with reduced food ***,dominance score and weight gain correlated weakly with body size,but positively with call rate and associated *** of aggressive calls inhibited the visits of bats to the focal food dish compared to playback of silence and echolocation *** amount of food consumed was greatly reduced in the presence of experimental stimuli versus ***,these results highlight that acoustic signals serve as an honest indicator of bat competitive ability and serve to defend food resources.
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