摘要
布氏田鼠种群在繁殖初期为随机分布,在其它时期为聚集分布。雌鼠之间的空间竞争进入繁殖季节时增强,尤其在繁殖期,雌鼠对雄鼠有很强的吸引性。雄鼠选择雌鼠作为最近邻体的观测值高于期望值,但没有显著性差异。雄鼠对雌鼠在非繁殖期有很强的吸引性。种群在繁殖期之前为聚集趋势,从非繁殖期进入繁殖期显示扩散趋势,繁殖期结束后又呈聚集趋势。此研究对同一生态学问题的探讨有重要作用。
The distribution of Brandt's vole were aggregated in the whole year except the initial breeding period. During that period, the voles were randomly distributed, and the females showed an increasing competitive trend for living space. The females had a strong attraction to the males,especially in the reproduction season. The observed proportion that males selected females as the nearest neighbours was higher than the expected one, but not significantly. The males had a strong attraction to the females in the non-reproduction season. The population showed an aggregated tendency before the reproduction season,a dispersal tendency from non-reproduction to reproduction season, an aggregated tendency again after the reproduction season.
出处
《生态学报》
CAS
CSCD
北大核心
1991年第2期111-116,共6页
Acta Ecologica Sinica
关键词
布氏田鼠
空间分布格局
季节变化
spatial patterns, seasonal changes, Brandt's vole (Microtus brandti).
