Invasive species of crayfish use a broader range of predation-risk cues than native species

Authors: Hazlett B.A.¹; Burba A.²; Gherardi F.³; Acquistapace P.³

Source: Biological Invasions, Volume 5, Number 3, 2003 , pp. 223-228(6)

Publisher: Springer

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Abstract:

The responses of invasive and native species of crayfish to conspecific and heterospecific alarm odors were recorded in the laboratory. Individuals of the North American invasive Procambarus clarkii responded just as strongly to odors from crushed Austropotomobius pallipes as they did to crushed conspecifics. The North American invasive Orconectes limosus also responded as strongly to P. clarkii odor as to conspecific odor. The native Italian species A. pallipes responded more strongly to conspecific alarm than to heterospecific alarm from P. clarkii. The pattern of invasive species of crayfish using a broader range of danger signals than displaced native species appears to be robust.

Keywords: alarm odors; crayfish; invasive species

Language: English

Document Type: Research article

Affiliations: 1: Department of Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, MI 48109, USA(e-mail: bhazlett@umich.edu; fax: +1-734-647-0884)) 2: Institute of Ecology, Akademijos, Vilnius, Lithuania 3: Dipartimento di Biologia Animale e Genetics ‘Leo Pardi’, Università di Firenze, 50125 Firenze, Italy

Publication date: 2003-01-01