Interactions of Peromyscus and Mus in a One-Acre Field Enclosure
Interactions of Peromyscus and Mus in a One-Acre Field Enclosure
复制标题
一英亩田间围场中白鼠属和小鼠的相互作用
作者：
L. Caldwell;J. Gentry
Peromyscus polionotus（旧场小鼠）和野生小家鼠（家鼠）共存于一个大的旧场面积在AEC萨凡纳河厂12年后，拆除人类居住地和放弃农业在该地区，但在两个重复实验的小鼠种群未能生存时，这两个物种被限制在一英亩的外壳在外地。在第二个实验中，如本文所述，五个小鼠被引入到1960年12月和1961年6月的外壳9 Peromyscus。1961年秋天，两个物种的数量都迅速增长，直到每种物种都有23只左右，比围栏外的密度大得多。小鼠种群的招募率下降和持续的高消失率导致该物种逐渐减少和灭绝;而Peromyscus种群保持在20至28个个体的水平。这两个物种最初在南极洲占据不同的区域。
Peromyscus polionotus (old—field mice) and feral Mus musculus (house mice) have coexisted in a large old—field area at the AEC Savannah River Plant for 12 yr following removal of human habitations and the abandonment of agriculture in the region, but in two replicate experiments a Mus population has failed to survive when the two species were confined to a one—acre enclosure in the field. In the second experiment, as described in this paper, five Mus were introduced into the enclosure in December 1960 and nine Peromyscus in June 1961. Rapid population growth in both species occurred in the fall of 1961 until about 23 of each species were present, a much bigger density than occurred outside the enclosure. A decline in recruitment rate and a continued high disappearance rate in the Mus population resulted in a gradual decline and extinction of this species; whereas the Peromyscus population maintained itself at a level of 20 to 28 individuals. The two species at first occupied separate areas in the enclosur...