Parasite-induced changes in nitrogen isotope signatures of host tissues
Parasite-induced changes in nitrogen isotope signatures of host tissues
复制标题
DOI：
10.1645/ge-1228.1
复制
发表时间：
2008-02-01
影响因子：
1.3
通讯作者：
Zuykova, Elena I.
中科院分区：
文献类型：
--
作者：
Doi, Hideyuki;Yurlova, Natalia I.;Zuykova, Elena I.
为了估计宿主体内吸虫寄生虫引起的同位素变化，我们研究了吸虫幼虫感染的淡水蜗牛Stagnaea stagnalis的碳和氮同位素比值的变化。我们测量了感染和未感染蜗牛的足、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之间的足和性腺的Δ C-13和Δ N-15值没有显着差异，因此，吸虫寄生虫感染可能不会引起蜗牛饮食的变化。然而，在肝胰腺中，Δ N-15值显着高于未感染的感染螺。感染钉螺肝胰腺中的~（15）N富集是由寄生虫组织中较高的~（15）N比值引起的。使用同位素混合模型，我们粗略估计，寄生虫在肝胰腺代表总蜗牛生物量的0.8%至3.4%，包括壳。
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 delta C-13 and delta N-15 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, delta N-15 values were significantly higher in infected than in uninfected snails. The N-15 enrichment in the hepatopancreas of infected snails is caused by the higher N-15 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.