PREADULT COMPETITION BETWEEN COLONIZING POPULATIONS OF DROSOPHILA-SUBOBSCURA AND ESTABLISHED POPULATIONS OF DROSOPHILA-SIMULANS IN CHILE
PREADULT COMPETITION BETWEEN COLONIZING POPULATIONS OF DROSOPHILA-SUBOBSCURA AND ESTABLISHED POPULATIONS OF DROSOPHILA-SIMULANS IN CHILE
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DOI：
10.1007/bf00384554
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发表时间：
1983-01-01
期刊：
影响因子：
2.7
通讯作者：
BRNCIC, D
中科院分区：
文献类型：
--
作者：
BUDNIK, M;BRNCIC, D
1978年，在智利首次发现了古北区的亚种，很可能是在美洲。目前，它的分布范围在29°54‘S到53°40’S之间，在家养和野生环境中都变得丰富起来，这取决于纬度和一年中的季节(出现频率最高的是早春)。亚鳞毛虫的季节波动与在某些地区共享同一栖息地的拟毛虫相反。在实验室条件下，在幼虫发育期内，与拟南星天牛相比，亚囊圆线虫是一个较差的竞争对手，相反，其他物种的幼虫似乎促进了这一竞争。智利小圆线虫的存在很可能是因为它的种群数量在拟圆线虫密度较低的时候出现了激增。
The palearctic species D. subobscura was detected for the 1st time in Chile and probably in the Americas in 1978. At present, its distribution area extends between 29.degree.54''S and 53.degree.40''S, where it has become abundant in both domestic and wild environments, depending on the latitude and the season of the year (appearing at maximum frequency in early spring). The seasonal fluctuations of D. subobscura are the inverse of those of D. simulans, which shares the same habitat in certain regions. Under laboratory conditions D. subobscura proved to be a poor competitor during the larval developmental period in relation to D. simulans, which on the contrary seemed to be facilitated by the larvae of the other species. The existence of D. subobscura in Chile is most probably due to its population flush at a time when D. simulans is at low density.