Metacercariae of Ornithodiplostomum ptychocheilus (Faust, 1917) Dubois, 1936 Encysted in the Brains and Viscera of Red-Sided Shiners from the Clark-Fork and Bitterroot Rivers of Montana: An Analysis of the Infected Hosts

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Abstract
Red-sided shiners (R. balteatus) infected with the metacercariae of O. ptychocheilus in the brains and viscera were studied to determine if the parasite load had any effect on stamina. A special chamber and electronic circuitry used for these studies are described. Statistical treatment of data derived from the experiments is by multivariate contingency table analysis. Parasites did not affect the stamina of the infected fish hosts, and the evolutionary significance of this feature is discussed.

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