Scaling of wingbeat and echolocation pulse emission rates in bats: why are aerial insectivorous bats so small?

摘要: 1. It has been proposed that echolocating bats normally emit one call per wingbeat when searching for prey. The coupling of sound production with flapping makes the intense pulses cost no more in energetic terms than beating wings and not calling, whereas calling without would be energetically expensive. scaling frequency pulse repetition rate body mass was investigated a cross-species analysis to test hypothesis are coupled bats. 2. For 57 species where measurements were available, most (75%) emitted 0.5-2 predicted during search phase