种内及种间干扰对围栏内花鼠分散贮藏行为的影响

Effects of intra-and inter-specific interference competition on scatter-hoarding behavior of Siberian chipmunk (Eutamias sibiricus) in semi-natural enclosures

2009年9月在黑龙江省带岭区东方红林场10 m×10 m半天然围栏内模拟花鼠种内(不同性别)和种间(大林姬鼠)干扰竞争对花鼠分散埋藏红松种子行为的影响。实验分四个处理两个批次进行,依次为单只花鼠对照实验(雄性7只,雌性9只)、种内同性干扰竞争、种内异性干扰竞争和种间干扰竞争。结果表明:(1)花鼠雌性个体的分散埋藏强度明显高于雄性个体;(2)种间干扰竞争引起花鼠对红松分散埋藏比例明显增加,而种内干扰对花鼠分散埋藏行为的影响不显著;(3)种内干扰竞争条件下,同性干扰竞争和异性干扰竞争对花鼠分散埋藏行为均无显著影响;(4)雄性个体在同性干扰下,埋藏强度不变;而在雌性个体干扰竞争下,埋藏强度增加;(5)雌性个体在雌性和雄性干扰条件下,花鼠分散埋藏行为均无明显变化。

The effects of intra-（different gender） and inter-specific（Apodemus penisulae） interferences on scatter-hoarding behavior of Siberian chipmunk（Eutamias sibiricus） were investigated in 10 m×10 m semi-natural enclosures in Heilongjiang province in September 2009.Four treatments were established and performed within two batches,i.e.,control group with single chipmunk;intraspecific intrasexual interference competition;intraspecific inter-sexual interference competition;and inter-specific interference.Our results showed that：（1） Female chipmunks scatter-hoarded more seeds than did males;（2） Inter-specific interference by A.penisulae significantly increased seed scatter-hoarding by chipmunks,while intra-specific interference showed no influence;（3） Both intra-and inter-sexual interference showed no effect on scatter-hoarding of chipmunks;（4） Male chipmunks scatter-hoarded more seeds when interfered by females,but did not change when interfered by males;（5） Both inter-and intra-sexual competitions showed no significant influence on scatter-hoarding of female individuals.