Fig. 4
From: Parasitic fauna of Eurasian beavers (Castor fiber) in Sweden (1997–1998)
The intensity of trematodes in the studied beavers, over a latitudinal gradient. a The intensity of adult trematodes in individual beavers shown in a South to North gradient. Each dot represents one beaver’s intensity of trematodes. Different symbols are used for beavers collected in lakes and rivers; b The intensity of new infection by metacercarians and juvenile trematodes of S. subtriquetrus shown in a South to North gradient