岩松鼠贮藏种子的空间记忆研究

Study of Spatial Memory in Seed-caching Sciurotamias davidianus

通过在岩松鼠自身埋藏种子附近选择相同生境人工埋藏种子的方法,研究岩松鼠对自身埋藏种子和人工埋藏种子的找回率有无差异,从而部分揭示记忆如何在岩松鼠找回贮藏种子过程中发挥作用。数据的统计分析采用SPSS for Windows(version 19.0)进行。结果显示:1)岩松鼠喜欢将种子贮藏在灌丛下方,但对埋藏基质没有明显偏好;2)埋藏微生境和埋藏基质对岩松鼠在对人工埋藏种子的找回过程中没有明显影响;3)岩松鼠对人工埋藏的核桃种子在种子找回过程中与自身埋藏的核桃种子有显著差异(Z=-2.499,P=0.014),对人工埋藏的胡桃楸种子在找回过程中与自身埋藏的胡桃楸种子有极显著差异(Z=-6.557,P<0.001)。

Spatial memory of seed-caching is an important way to recover cached seeds for seed-hoarded animals.The current study was conducted to investigate whether there were differences between the recovering rates of buried seeds by David＇s rock squirrels（Sciurotamias davidianus） and artificial control in shrubbery of Dongling Mountain of northwestern Beijing in October 2007.The results showed that： firstly,David＇s rock squirrel preferred to cache seeds under shrubs with no obvious predilection on buried-substrate;secondly,no significant effects of buried-microhabitat and buried-substrate were observed on seeking of artificial buried seeds by David＇s rock squirrel;thirdly,the recovering rates of David＇s rock squirrels on artificial buried Juglans regia seeds were significantly different with that buried by themselves（Z =-2.499,P = 0.014）,and more significant difference was observed on Juglans mandshurica seeds（Z =-6.557,P〈0.001）.