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Hatching of Echinostoma trivolvis miracidia in response to snail host and non-host chemical cues

机译:对蜗牛寄主和非寄主化学线索孵化的棘皮动物棘皮虫

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摘要

Environmental cues are used by many organisms to time life history transitions and can be important for trematode host location. However, while much is understood about how larval trematodes locate hosts, much less is known about the potential role of host cues in the timing of trematode egg development and hatching. We addressed the potential role of host chemical cues in mediating hatching of Echinostoma trivolvis miracidia by comparing hatching in response to cues from the first intermediate host (the snail Planorbella trivolvis), a non-host snail (the snail Goniobasis proxima), and a non-host invertebrate (earthworm, Lumbricus terrestris). We hypothesized that in the presence of cues from their first intermediate host, E. trivolvis would hatch sooner and would be more synchronized than when host cues were absent. However, we found that hatching was unaffected by our cue treatments. In all treatments, hatching uniformly began at 13 days and was nearly evenly spread over the next 3 weeks.
机译:许多生物都使用环境提示来改变生活史,这对于吸虫的寄主位置可能很重要。但是,尽管对幼虫吸虫如何定位宿主的了解很多,但对宿主线索在吸虫卵发育和孵化时机中潜在作用的了解却很少。我们通过比较第一个中间宿主(蜗牛Planorbella trivolvis),非宿主蜗牛(蜗牛Goniobasis proxima)和非宿主蜗牛的孵化反应,探讨了宿主化学线索在介导棘皮chin虫孵化中的潜在作用。 -宿主无脊椎动物(ear,Lu类)。我们假设,在没有来自第一个中间宿主的提示的情况下,特里弗埃希氏菌比没有宿主提示时孵化更早,并且同步性更高。但是,我们发现孵化不受提示处理的影响。在所有处理中,孵化均从13天开始均匀开始,并且在接下来的3周内几乎均匀分布。

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