Intra- and intersexual differences in parasite resistance and female fitness tolerance in a polymorphic insect.
Intra- and intersexual differences in parasite resistance and female fitness tolerance in a polymorphic insect.
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DOI：
10.1098/rspb.2016.2407
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发表时间：
2017-01-25
期刊：
影响因子：
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通讯作者：
Svensson EI
中科院分区：
文献类型：
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作者：
Willink B;Svensson EI
为了了解宿主-寄生虫相互作用，有必要量化防御性状的变异和协变。我们量化了寄生虫的抗性和健身耐受性的多态豆娘（Ischnura elegans），昆虫与三个离散的女性的颜色形态，但与单态男性。我们量化了十多年来自然种群中女性寄生虫抗性（水螨感染的患病率和强度）和形态特异性健身耐受性的性别和形态差异。有没有证据表明，较高的寄生虫易感性在男性作为性选择的成本，而女性之间的防御机制的差异是一致的寄生虫抗性和耐受性的组合上操作的相关选择。我们认为，女性变体之间的耐受性差异与频率依赖性冲突相互作用，从而保持了局部的多态性。因此，宿主-寄生虫的相互作用可以形成性内和性间表型差异，并干扰性选择和性冲突。
To understand host–parasite interactions, it is necessary to quantify variation and covariation in defence traits. We quantified parasite resistance and fitness tolerance of a polymorphic damselfly (Ischnura elegans), an insect with three discrete female colour morphs but with monomorphic males. We quantified sex and morph differences in parasite resistance (prevalence and intensity of water mite infections) and morph-specific fitness tolerance in the females in natural populations for over a decade. There was no evidence for higher parasite susceptibility in males as a cost of sexual selection, whereas differences in defence mechanisms between female morphs are consistent with correlational selection operating on combinations of parasite resistance and tolerance. We suggest that tolerance differences between female morphs interact with frequency-dependent sexual conflict, which maintains the polymorphism locally. Host–parasite interactions can therefore shape intra- and intersexual phenotypic divergence and interfere with sexual selection and sexual conflict.