Hanson M T, Coss R G
Department of Psychology, University of California, Davis, CA 95616, USA.
Dev Psychobiol. 2001 Nov;39(3):199-206. doi: 10.1002/dev.1045.
Newly emerged pup, juvenile, and adult California ground squirrels (Spermophilus beecheyi douglasii) were videorecorded at a seminatural field site in northern California. Video data revealed age differences in the budgeting of ground squirrel behavior, habitat use, and physiological arousal as indicated by morphometric analyses of tail piloerection. Adults and juveniles devoted their time to foraging in the open at feeding stations while displaying low to moderate levels of arousal, respectively. Pups remained vigilant on the fringe of covered habitats while displaying comparatively higher levels of arousal. Higher pup arousal may facilitate memory formation during early stages of development.
新出现的幼崽、幼年和成年加利福尼亚地松鼠（Spermophilus beecheyi douglasii）在加利福尼亚北部的一个半自然野外场地被录像。视频数据显示，地松鼠的行为预算、栖息地利用和生理唤醒存在年龄差异，这通过对尾巴竖毛的形态测量分析得以表明。成年和幼年地松鼠分别将时间用于在喂食站的开阔地带觅食，同时表现出低到中等水平的唤醒。幼崽则在有遮蔽的栖息地边缘保持警惕，同时表现出相对较高的唤醒水平。较高的幼崽唤醒水平可能有助于在发育早期形成记忆。
