共查询到20条相似文献,搜索用时 15 毫秒
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W. H. Bradley 《BMJ (Clinical research ed.)》1938,2(4057):733-738
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H. S. Schultess Young 《BMJ (Clinical research ed.)》1897,2(1928):1758-1759
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Thos. D. Savill 《BMJ (Clinical research ed.)》1897,2(1925):1538-1540
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《新西兰生态学杂志》2011,22(2):205-208
The measurement of parasitism rates of wasp nests;lt Pelorus Bridge, New Zealand, at different distances from the initial release point suggests that the mean displacement of the parasitoid has increased by 1—1.5 km y(-1) from 1988 to 1993. Since average parasitism rates within this radius at any given site show little trend over time, this suggests an approximate 3-fold increase in the total parasitoid population each year, two-thirds of which is devoted to dispersal and one-third to maintaining local populations. 相似文献
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P. L. T. Bennett 《BMJ (Clinical research ed.)》1940,2(4166):644-645