Aim To test the relative impacts of seed size and germination schedule on hoarding strategy of David' s rock squirrel. Methods Based on the field investigation in the experimental plots, the seed fates that had been handled by animals were compiled and analyzed. Results The hoarding proportion of Cyclobalanopsis engleriana with small size and long germination schedule were higher significantly than that of Quercus aliena with large size and short germination schedule. Similarly, the eating proportion of C. Engleriana were lower than that of Q. Aliena, but the difference was not significant. On dispersal distance, the eating and hoarding distances of Q. Aliena were farther significantly than that of C. Engleriana. The results may be affected by limited experimental time and did not consider the repeat removal and hoarding by animals. Conclusion The hoarding strategy of David's rock squirrel supported the seed germination schedule hypothesis and combinating the findings in North America, proved that the sensitivity of seed germination may be the innate adaptive behavior of squirrels.%目的 检验种子大小和萌发时间这两种特征对岩松鼠(Sciurotamias davidianus)贮藏策略的相对影响.方法 采用野外调查的方法,对样地内释放的实验种子命运进行调查,并汇总统计分析.结果 个体小,萌发时间长的小青冈(Cyclobalanopsis engleriana)种子的贮藏比例(61％)显著高于个体大,萌发时间短的锐齿栎种子(Quercus aliena)(46％)；相应的小青冈种子的取食比例(27％)低于锐齿栎种子(34％),但是差异并不显著；在扩散距离上,锐齿栎种子的取食和贮藏距离均显著的远于小青冈种子,这可能受到短时间实验条件的限制而无法考虑动物的多次搬运和埋藏行为.结论 岩松鼠的贮藏策略支持种子萌发时间假说,结合北美的研究结果,证明对种子萌发的敏感性或许是松鼠科动物的先天适应行为.
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