Experimental infection of the digeneans to some congeneric snail species radiated in a single water system: Relative importance of local evolution and phylogenetic constraint.
Experimental infection of the digeneans to some congeneric snail species radiated in a single water system: Relative importance of local evolution and phylogenetic constraint.
复制标题
双嵌体对单一水系统中辐射的一些同属蜗牛物种的实验感染：局部进化和系统发育约束的相对重要性。
DOI：
10.1016/j.parint.2016.01.003
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发表时间：
2016
影响因子：
1.9
通讯作者：
M.
中科院分区：
文献类型：
--
作者：
Urabe;M.
为了确定宿主-寄生虫协同进化和寄生虫资源追踪所引起的局部适应的相对重要性，实验研究了淡水螺属Semisulcospira对双殖吸虫属Genarchopsis的易感性。调查了日本琵琶湖水系特有的四种蜗牛和两种非特有种。除一个种外，其他所有种的敏感性也进行了地方性变异的测定，从高岛（Genarchopsis gigiandGenarchopsis chubuensis的混合种群）和长滨（G. chubuensis）。在地方性半沟螺旋体中，密切相关的种对（Semisulcospira habei和Semisulcospira niponica，Semisulcospira decipiens和Semisulcospira nakasekoae）对来自两个地方的寄生虫表现出相似的亲和性。哈贝尔和S.日本血吸虫对高岛寄生虫高度敏感，但对长滨寄生虫具有抗性。decipiens和S. nakasekoae对两个地区的寄生虫均表现出中度易感性。没有地方性蜗牛物种表现出明显的局部变化的敏感性。这些结果表明，地方性半沟螺Genarchopsis的易感性是保守的，可以作为资源追踪的一个例子。其中一种非地方性蜗牛，解放半沟螺，表现出当地的易感性变化。这种变化与用于实验感染的寄生虫的同域性无关，表明这不是寄生虫局部适应的结果。
To determine the relative importance of local adaptation caused by host–parasite coevolution and resource tracking by the parasites, the susceptibility of the freshwater snail genusSemisulcospirato the digenean parasite genusGenarchopsiswas investigated experimentally. Four snail species endemic to the Lake Biwa system in Japan and two non-endemic species were investigated. All but one species was also tested for local variation in susceptibility.Parasites were obtained from Takashima (mix population ofGenarchopsis gigiandGenarchopsis chubuensis) and Nagahama (G. chubuensis). In endemicSemisulcospira, closely related specie pairs (Semisulcospira habeiandSemisulcospira niponica,Semisulcospira decipiensandSemisulcospira nakasekoae) showed similar susceptibilities to parasites from both localities.S. habeiandS. niponicawere highly susceptible to parasites from Takashima, but were resistant to parasites from Nagahama.S. decipiensandS. nakasekoaeshowed moderate susceptibility to parasites from both localities. None of the endemic snail species showed a clear local variation in susceptibility. These results show that the susceptibility of endemicSemisulcospiratoGenarchopsisis conservative and can be regarded as an example of resource-tracking. One of the non-endemic snails,Semisulcospira libertina, showed local variation in susceptibility. This variation was not related to the sympatry of the parasites used for the experimental infection, suggesting that it was not the result of local adaptation by parasites.