“group size theory" 说的是动物在一个大的group里面比在一个小的group里面decrease vigilance,作者是这样解释的 the group spend more time to feed and the predator is more easily to detect
“group size theory" 说的是动物在一个大的group里面比在一个小的group里面decrease vigilance,作者是这样解释的 the group spend more time to feed and the predator is more easily to detect