期刊
BULLETIN FRANCAIS DE LA PECHE ET DE LA PISCICULTURE
卷 -, 期 361, 页码 659-668出版社
CONSEIL SUPERIEUR DE LA PECHE
DOI: 10.1051/kmae:2001011
关键词
alien species; crayfish; predation; amphibian tadpoles; biodiversity conservation; Austropotamobius pallipes; Procambarus clarkii
类别
In the laboratory, the motivation and/or ability to prey on anuran larvae (Bufo bufo, Rana kl. esculenta and R. italica) were compared between a native European (Austropotamobius pallipes) and an alien North American crayfish species (Procambarus clarkii). Both were skilled predators of tadpoles, adopting a sit-and-wait strategy. However, because P. clarkii displayed lower latency times in the presence of one of the three amphibians (Rana kl. esculenta) here tested, the hypothesis is raised that invasive crayfish are more opportunistic predators and possibly faster in switching to different prey than those species they are displacing. From a conservation perspective, these preliminary results further emphasise the importance of studies centred on the invasion-displacement dichotomy.
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