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Do predators prefer toxic animals?A case of chemical discrimination by an Asian snake that sequesters firefly toxins

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Current Zoology 2022年第6期68卷 627-634页

作者： Masaya FUKUDA Rinako UJIIE Takato INOUE Qin CHEN Chengquan CAO Li DING Naoki MORI Akira MORI Department of Zoology Graduate School of ScienceKyoto UniversityKyoto 606-8502Japan Department of Applied Life Science Graduate School of AgricultureKyoto UniversityKyoto 606-8502Japan Chengdu Institute of Biology Chinese Academy of SciencesChengduSichuan 610041China College of Life Sciences Leshan Normal UniversityLeshanSichuan 614000China

Several Asian natricine snakes of the genus Rhabdophis feed on toads and sequester steroidal cardiac toxins known as bufadienolides(BDs)from them.A recent study revealed that species of the Rhabdophis nuchalis Group ingest lampyrine fireflies to sequester *** several species of fireflies are distributed in the habitat of the *** Group,only lampyrine fireflies,which have BDs,are included in the diet of these ***,we hypothesized that the *** Group chemically distinguishes fireflies that have BDs from those that do not have *** also predicted that the *** Group detects BDs as the chemical cue of toxin *** test these predictions,we conducted 3 behavioral experiments using Rhabdophis chiwen,which belongs to the *** *** the first experiment,*** showed a moderate tongue flicking response to cinobufagin,a compound of *** the other hand,the snake showed a higher response to the chemical stimuli of lampyrine fireflies(BD fireflies)than those of lucioline fireflies(non-BD fireflies).In the second experiment,in which we provided live BD and non-BD fireflies,the snake voluntarily consumed only the *** the third,a Y-maze experiment,the snake tended to select the chemical trail of BD fireflies more frequently than that of non-BD *** results demonstrated that *** discriminates BD fireflies from non-BD fireflies,but the prediction that BDs are involved in this discrimination was not fully *** identify the proximate mechanisms of the recognition of novel toxic prey in the *** Group,further investigation is necessary.

关键词： Bufadienolides chemical preference fireflies Rhabdophis toxin sequestration

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