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  • Title: Downstream changes in the composition of the parasite community of fishes in an Appalachian stream.
    Author: Barger MA, Esch GW.
    Journal: J Parasitol; 2001 Apr; 87(2):250-5. PubMed ID: 11318552.
    Abstract:
    The spatial distribution of 6 parasite species (Myxobolus sp., Dactylogyrus sp., Sterliadochona ephemeridarum, Plagioporus sinitsini, Allopodocotyle chiliticorum, Allocreadium lucyae) was studied in 5 species of fishes (Oncorhynchus mykiss, Clinostomus funduloides, Notropis chiliticus, Rhinichthys atratulus, Semotilus atromaculatus) in Basin Creek, an Appalachian stream in North Carolina. Nonmetric multidimensional scaling and vector fitting were used to determine if the proximity of sampling sites was related to community similarity. Position along Basin Creek was significantly related to parasite community structure. Breaks in parasite community composition were imposed by waterfalls at upstream areas of Basin Creek that restricted distributions of C. funduloides, N. chiliticus, and S. atromaculatus and at the downstream limit of the study area by a break in the distribution of S. ephemeridarum coincident with the existence of a dam but were independent of suitable piscine host distributions. These discontinuities in parasite community composition imply that the relationship between proximity of sites and community similarity is predictive because distance between sites is related to the probability that fish at different sampling sites recruit parasites from different species pools. This relationship is not the same for all component communities.
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