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Differences in mating behavior lead to asymmetric mating interactions and consequential changes in sex ratio between an invasive and an indigenous whitefly

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Integrative Zoology 2012年第1期7卷 1-15页

作者： Junbo LUAN Shusheng LIU Ministry of Agriculture Key Laboratory of Agricultural Entomology Institute of Insect SciencesZhejiang UniversityHangzhouChina

The invasive B whitefly and the indigenous ZHJ2 whitefly in China of the Bemisia tabaci complex represent two previously allopatric cryptic *** experiments have shown that the invasive B can displace the indigenous ***,we observed the mating behavior and mating interactions between B and ZHJ2 to elucidate the behavioral mechanisms underlying their *** 2 species are able to mate with each oth-er,although at a significantly lower frequency than that between males and females within the same ***-mated females produce only male progeny,indicating reproductive *** mating had only a marginal effect on reproduction of females in either *** observations on mating interactions between the 2 species showed that B had higher sexual activity than ZHJ2.B males were more like-ly to interrupt courtships initiated by rival males than ZHJ2 *** with ZHJ2 males,B males were also more likely to successfully interrupt courtships initiated by rival heterospecific males than by males of the same *** addition,B males guarded B females post-copulation,whereas ZHJ2 males did *** the 2 species co-occurred,the behavioral differences and interactions between them resulted in an increased propor-tion of females produced in the offspring of B but reduced proportion of females in the progeny of *** asymmetric mating interactions might be an important mechanism underlying the displacement of ZHJ2 by *** study shows that reproductive interference might contribute to the competitive exclusion between closely related species during biological invasions.

关键词： Bemisia tabaci biological invasion courtship displacement mating interactions

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