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.  
  Part of: 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