Model selection statistics for macroparasite transmission functional forms (table 1 in main text of manuscript) according to different experimental conditions (a-b) of rainbow trout Oncorhynchus mykiss hosts and cercariae of Diplostomum spathaceum (Karvonen et al. 2003) and (c-d) of minnow Zacco temmincki and cercariae of Centrocestus armatus (Paller et al.2007). Functional forms with identical AICc values are mathematically equivalent under the experimental condition tested.