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首页> 外文期刊>Limnology >Adult hairworms face the risk of ingestion by stream salmonids via predation on their cricket hosts
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Adult hairworms face the risk of ingestion by stream salmonids via predation on their cricket hosts

机译：成年毛发面临着salmon宿主掠食而被溪流鲑鱼吞食的危险。

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This study explored the risk of predation by trout (non-host predator) on adult hairworms Gordionus chinensis. Ten percent of trout (18 out of 187 trout) ingested adult hairworms in a Japanese headwater stream of the Totsu River. All hairworms were ingested by trout that had also ingested their insect definitive hosts (camel crickets: Tachycines elegantissima and T. asynamorus). Trout had never foraged hairworms directly in the two field experiments. These results suggest that hairworms were ingested by trout via predation on their hosts. Large trout ingested hairworms more frequently than smaller trout did. The larger trout were more abundant in the main stem compared with the upper tributary, which might suggest spatial heterogeneity of predation risk for adult hairworms within a river system.
机译：这项研究探讨了鳟鱼（非寄主捕食者）捕食成年hair Gordionus chinensis的风险。鳟鱼的百分之十（187条鳟鱼中的18条）在日本Totsu河的源头溪流中摄取了成虫。所有的hair虫都被鳟鱼吞噬，鳟鱼也吞噬了昆虫的定居宿主（骆驼：Tachycines Elegantissima和T. asynamorus）。鳟鱼从未在两个野外试验中直接觅食过发虫。这些结果表明，hair虫通过捕食寄主而被鳟鱼摄取。大鳟鱼比小鳟鱼更频繁地摄取蠕虫。与上游支流相比，大鳟鱼的主茎更丰富，这可能表明河流系统内成虫的捕食风险在空间上存在异质性。

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