Myxosoma funduli Kudo 1918 (Protozoa: Myxosporida) in Fundulus kansae (Pisces: Cyprinodontidae): Annual Prevalence and Geographic Distribution

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Abstract
The occurrence and distribution of the myxosporidan M. funduli in the plains kilifish (F. kansae) were investigated. Samples from sites on the south Platte and Platte River drainages in Nebraska [USA] were collected by seining during various months of 1976, 1977 and 1978. At a number of the localities no F. kansae were found; the remainder of the collecting sites showed the host population to be abundant, but the M. funduli infections to vary in prevalence. The protozoan parasite population in F. kansae, upstream from the Nebraska Tri-County Diversion Dam and Canal, at North Platte, Nebraska, demonstrated year-long distributions and intensities similar to those reported for the summer months of 1975 and 1976 (Knight et al., 1977). Downstream from the diversion dam, the prevalance of M. funduli in F. kansae was considerably lower than that observed upstream. The demographic characteristics of the infected fish subpopulation were identical to those of the whole fish population upstream from the diversion; those infected fish downstream from the diversion were too few to establish conclusive demographic results.

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