Effect of food source distance on hoarding strategy of Apodemus draco

CHEN Xiaoning，ZHANG Bo, WANG Jing,HOU Xiang, HAN Ning, SHEN Jian，CHANG Gang

1. Shaanxi Institute of Zoology
• Online:2017-04-20 Published:2017-04-20

食物源距离对中华姬鼠贮藏策略的影响

1. 陕西省动物研究所

Abstract:

The effect of food source distance on hoarding strategy of South China field mice (Apodemus draco) was tested in a semi-natural enclosure, and two predictions based on the Rapidly Sequestering Hypothesis and Optimal Cache Spacing Model  were examined: (1) Seeds would be scatter-hoarded near the three test sites respectively regardless of distance between nest and test sites; (2) With increasing of distance between cache site and nest，the proportion of larder-hoarded seeds would decrease. The results showed that scatter hoarding behavior is the main caching strategy of A. draco, and there was no significant difference in the number of seeds scatter-hoarded in the three test sites, supporting prediction 1. The proportions of seeds that were larder-hoarded decreased with the increase of distance between test site and the nest (1m：6.25%; 5m：1.88%; 13m：1.25%), supporting prediction 2. Our results indicated that with the increased predation risk, A. draco tend to reduce the number of seeds eaten and cached.