Use of a negative binomial distribution to describe the presence of Sphyrion laevigatum in Genypterus blacodes

Abstract

This paper describes the frequency and number of Sphyrion laevigatum in the skin of Genypterus blacodes, an important economic resource in Chile. The analysis of a spatial distribution model indicated that the parasites tended to cluster. Variations in the number of parasites per host could be described by a negative binomial distribution. The maximum number of parasites observed per host was two.

Negative binomial distribution to describe the presence of Trifur tortuosus (Crustacea: Copepoda) in Merluccius gayi (Osteichthyes: Gadiformes)

“…The data fit this distribution (χ 2 Observed = 0.747 < χ 2 table = 168.130; p > 0.05). Many individuals were found not to contain T. (Shaw et al, 1998, Peña-Rehbein et al, 2013…”