Figure 10b from: Wayland M (2013) Morphological variation in Echinorhynchus truttae Schrank, 1788 and the E. bothniensis Zdzitowiecki & Valtonen, 1987 species complex from freshwater fishes of northern Europe. Biodiversity Data Journal 1: e975. https://doi.org/10.3897/BDJ.1.e975

Figure 10b - Observed and fitted distributions of Echinorhynchus truttae in two populations of its definitive host Salmo trutta. Analysis based on data in Suppl. materials 6, 7.
Loch Walton Burn. Negative binomial distribution has parameters: mu=0.565 and k=0.375. Poisson distribution has parameter lambda=0.565. AIC for fitted distributions: negative binomial, 97.5; Poission, 107.3.