Fig. 3From: Persistent establishment of a tropical disease in Europe: the preadaptation of schistosomes to overwinterSurvival curves of the healthy B. truncatus snails from the two temperate strains, Spain (a) and Corsica (b), and from the tropical strain, Cameroon (c), maintained at four different winter temperatures. Key: 4 °C, yellow curve; 8 °C, orange curve; 16 °C, blue curve; 24 °C, green curveBack to article page