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首页> 外文期刊>Journal of Parasitology >Parasite-induced changes in nitrogen isotope signatures of host tissues.
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Parasite-induced changes in nitrogen isotope signatures of host tissues.

机译：寄生虫诱导宿主组织中氮同位素特征的变化。

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摘要

To estimate isotopic changes caused by trematode parasites within a host, we investigated changes in the carbon and nitrogen isotope ratios of the freshwater snail Lymnaea stagnalis infected by trematode larvae. We measured carbon and nitrogen stable isotopes within the foot, gonad, and hepatopancreas of both infected and uninfected snails. There was no significant difference in the delta13C and delta15N values of foot and gonad between infected and uninfected snails; thus, trematode parasite infections may not cause changes in snail diets. However, in the hepatopancreas, delta15N values were significantly higher in infected than in uninfected snails. The 15N enrichment in the hepatopancreas of infected snails is caused by the higher 15N ratio in parasite tissues. Using an isotope-mixing model, we roughly estimated that the parasites in the hepatopancreas represented from 0.8 to 3.4% of the total snail biomass, including the shell.
机译：为了估计由寄主中的吸虫寄生虫引起的同位素变化，我们调查了受吸虫吸虫幼虫感染的淡水蜗牛斜纹夜蛾的碳和氮同位素比的变化。我们测量了感染和未感染的蜗牛的脚，性腺和肝胰腺内的碳和氮稳定同位素。感染和未感染的蜗牛的足和性腺的delta13C和delta15N值均无显着差异。因此，吸虫吸虫可能不会改变蜗牛的饮食。但是，在肝胰腺中，感染的蜗牛的delta15N值显着高于未感染的蜗牛。寄生蜗牛肝胰腺中15N的富集是由寄生虫组织中较高的15N比率引起的。使用同位素混合模型，我们粗略估计肝胰腺中的寄生虫占蜗牛总生物量的0.8％至3.4％，包括壳。

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