THE IMPACT OF PARASITOIDS ON NATURAL-POPULATIONS OF TEMPERATE WOODLAND DROSOPHILA
THE IMPACT OF PARASITOIDS ON NATURAL-POPULATIONS OF TEMPERATE WOODLAND DROSOPHILA
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DOI：
10.1163/156854288x00049
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发表时间：
1988-01-01
期刊：
影响因子：
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通讯作者：
ROODBOL, N
中科院分区：
文献类型：
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作者：
JANSSEN, A;DRIESSEN, G;ROODBOL, N
研究了温带林地果蝇及其水翅型寄生蜂的种复合体，以阐明寄生率作为果蝇种群死亡因子的重要性。共5841果蝇和801寄生蜂出现从收集的现场样品，表明总寄生率为12.1%。盛夏9周的寄生率较高，平均为32.5%。寄生率在一些基板类型，即受伤的树木的液流，范围从70%到100%，表明寄生的风险果蝇物种，专门在这个基板上是非常高的，而寄生蜂专门在这个微生境可能会遇到高的内部和种间竞争的主机。它的结论是寄生是一个重要的死亡因素，在相当大的一部分果蝇繁殖季节。
The species complex of temperate woodland Drosophila and its hymenopterous parasitoids was studied to elucidate the importance of parasitization as a mortality factor of Drosophila populations. A total of 5841 Drosophila and 801 parasitoids emerged from the collected field samples, indicating an overall parasitization rate of 12.1%. Parasitization rates during a period of 9 weeks in midsummer wer considerably higher, with a mean rate of 32.5%. Parasitization rates in some substrate types, i.e. sap fluxes of wounded trees, ranged from 70% to 100%, indicating that risks of parasitization for Drosophila species that specialize on this substrate are very high, whereas parasitoids specialized on this microhabitat may experience high intra- and interspecific competition for hosts. It is concluded that parasitization is an important mortality factor during a considerable part of the Drosophila breeding season.