Negative binomial distribution to describe the presence of Trifur tortuosus (Crustacea: Copepoda) in Merluccius gayi (Osteichthyes: Gadiformes)
This paper describes the frequency and number of Trifur tortuosus in the skin of Merluccius gayi, an important economic resource in Chile. Analysis of a spatial distribution model indicated that the parasites tended to cluster. Variations in the number of parasites per host can be described by a negative binomial distribution. The maximum number of parasites observed per host was one, similar patterns was described for other parasites in Chilean marine fishes.