Fig. 1.

Summary of the life-history traits and transmission strategies (i.e. next target hosts, morphological features, distribution in the water column, swimming behaviours and emergence patterns) of cercariae of the three genera selected for the present study, represented by four trematode taxa: Diplostomum spp., Apatemon spp., small- and large-sized Plagiorchis spp. (see Materials and methods for references). Arrows indicate the direction of phototaxy. The size of cercariae is in proportion to their original size.