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首页> 外文期刊>Parasitology >Evidence for sex ratio distortion by a new microsporidian parasite of a Corophiid amphipod.
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Evidence for sex ratio distortion by a new microsporidian parasite of a Corophiid amphipod.

机译：Corphiphiid两栖类动物的新的微孢子虫寄生虫引起的性别比畸变的证据。

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摘要

In this paper, we describe the occurrence of a microsporidian parasite in female-biased populations of an intertidal amphipod, Corophium volutator (Pallas), at mudflat sites in the Bay of Fundy, Canada. Sequence data for the parasite's 16S rDNA indicate that it is a novel microsporidian species. This parasite was found principally in female host gonads, indicating that it might be a vertically transmitted, sex-distorting microparasite. At 4 sites each sampled in early and mid-summer, parasite prevalence varied from 0 to 21%. In the lab, infected mothers gave rise to more female-biased broods, than did uninfected mothers. Infection was not associated with size of females or with lowered survivorship of their young. Surprisingly, infected mothers actually had higher fertility controlling for body length than did uninfected mothers. Taken together, our results suggest that this novel microsporidian is likely a feminizing microparasite and is a contributing factor to local and widespread sex ratio distortion in C. volutator.
机译：在本文中，我们描述了在加拿大芬迪湾的滩涂地点，潮间带两栖动物脚虫科（Corophium v​​olutator（Pallas））的女性偏见种群中发生了微孢子虫寄生虫。寄生虫的16S rDNA的序列数据表明，它是一种新型的微孢子虫。这种寄生虫主要存在于雌性宿主性腺中，这表明它可能是垂直传播的，扭曲性别的微寄生虫。在每个夏初和仲夏采样的4个地点，寄生虫患病率从0％到21％不等。在实验室中，受感染的母亲比未受感染的母亲产生更多的女性偏见。感染与女性的体型或年轻的存活率降低无关。令人惊讶的是，受感染的母亲实际上比未受感染的母亲具有更高的控制体长的生育能力。两者合计，我们的结果表明，这种新型的微孢子虫可能是女性化的微寄生虫，并且是导致梭状芽胞杆菌局部和广泛性别比例畸变的一个因素。

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