Fig. 5
From: Ecological plasticity and commercial impact of invasive marbled crayfish populations in Madagascar
Biological impact of marbled crayfish on Madagascar. a Real-time PCR detection of the crayfish plague agent Aphanomyces astacii in animals that were collected in various locations in Madagascar. Numbers of animals analyzed per site are indicated by circle size (small = 10, intermediate = 20, large = 30). Agent levels are indicated by section colors. b Sympatry of marbled crayfish and Astacoides betsileoensis in the Andragnaroa river. c Laboratory experiment to test the predation of Biomphalaria pfeifferi snails by marbled crayfish. Bar: 2 cm. d Leftover B. pfeifferi shells, found after overnight co-housing with marbled crayfish. Bar: 2 mm. Map and pictures were produced by the first author