Gould E, Cooley B, Barnick P
Dev Psychobiol. 1981 Jan;14(1):41-54. doi: 10.1002/dev.420140106.
This study documents developmental changes in the vocal reaction of bats to obstacles and describes the pulse patterns of young bats on their 1st and subsequent flights. The pulse repetition rate of young bats showed an increase just before the bats approached obstacles. This pattern differs from that of older bats. The distance at which the change in pulse repetition rate occurs is roughly twice as far from the obstacle in adults as it is in young bats. Even on their 1st flights young bats (25-29 days old) seemed to perform better than chance. This capability seems to be resistant to environmental manipulation during the preweaning period.
本研究记录了蝙蝠对障碍物的发声反应的发育变化，并描述了幼蝠首次飞行及后续飞行时的脉冲模式。幼蝠在接近障碍物之前，其脉冲重复率会增加。这种模式与成年蝙蝠不同。成年蝙蝠脉冲重复率发生变化时与障碍物的距离大约是幼蝠的两倍。即使在首次飞行时，幼蝠（25 - 29日龄）似乎也表现得比随机情况要好。这种能力在断奶前期似乎不受环境操纵的影响。
