Welker C
Folia Primatol (Basel). 1976;26(4):284-91. doi: 10.1159/000155758.
Fishing behaviour was first observed in Galago crassicaudatus. Some of the animals (Maria, Werner, Ilse) was born in the wild, some in captivity in family groups [Welker, 1972]. The colony had been under permanent observation since 1971. The following results were obtained: (1) One animal had to begin with fishing behaviour. (2) The other animals learned it by watching one animal fishing. (3) Animals born in captivity, deceived by the refraction of the water, grasped constantly too high.
钓鱼行为最初是在粗尾婴猴身上观察到的。其中一些动物（玛丽亚、维尔纳、伊尔莎）出生在野外，一些则出生在家庭饲养环境中[韦尔克，1972]。自1971年以来，该群体一直处于长期观察之下。得到了以下结果：（1）一只动物必须开始钓鱼行为。（2）其他动物通过观察一只动物钓鱼而学会了这种行为。（3）在饲养环境中出生的动物，由于水的折射而受骗，抓取的位置总是过高。
