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DISTRIBUTION, PREVALENCE, AND MAXIMUM INTENSITY OF THE ECTOPARASITIC COPEPOD SALMINCOLA CF. EDWARDSII IN BROOK TROUT IN WISCONSIN STREAMS.

08:00 EDT 23rd August 2018 | BioPortfolio

Summary of "DISTRIBUTION, PREVALENCE, AND MAXIMUM INTENSITY OF THE ECTOPARASITIC COPEPOD SALMINCOLA CF. EDWARDSII IN BROOK TROUT IN WISCONSIN STREAMS."

Since the late 19th century the ectoparasitic copepod Salmincola cf. edwardsii have been observed infecting brook trout Salvelinus fontinalis in Wisconsin streams. A perceived increase in the incidence of S. cf. edwardsii infection across the state and the observation of an S. edwardsii epizootic leading to declines in brook trout recruitment in Ash Creek, Wisconsin, have raised concerns about the extent to which S. edwardsii threaten other populations of brook trout in Wisconsin streams. In 2013-2017, brook trout were inspected in 282 streams across the state to determine the distribution, prevalence, and maximum intensity of infection of adult female copepods whose morphology was consistent with S. edwardsii. Salmincola cf. edwardsii were present in 79% of streams and absent from 21%. Prevalence of infection ranged from 0.4% to 100% where the parasite was present. Maximum intensity of infection was low (1-5 S. cf. edwardsii) in 31% of streams, moderate (6-14) in 35%, and high (15) in 34%. Maximum intensity was high and prevalence exceeded 90% of brook trout in 9 streams, which suggests epizootics as observed in Ash Creek are uncommon. Our statewide distributional data is critical to understanding the scope of S. cf. edwardsii infection of brook trout in Wisconsin's recreational fisheries and will provide a baseline for ongoing and future investigations of S. cf. edwardsii-brook trout dynamics.

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This article was published in the following journal.

Name: The Journal of parasitology
ISSN: 1937-2345
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