Project: An Assessment of Possible Resistance to Whirling Disease among Rainbow Trout and Snake River Cutthroat Trout after Exposure to Myxobolus cerebralis Infection in the Upper Colorado River in Middle Park, Colorado

Primary Investigator: R. Barry Nehring
Project Summary: In July of 1998, two sizes of Snake River cutthroat (SRC) and two groups of wild-strain rainbow (R) of different parentage were exposed for 35 days to four levels of TAMs in the upper CO River. The R were progeny of parental cohorts recruited before and after M. cerebralis became enzootic in the river. The larger SRC were 55 mm; the smaller SRC and R were 35 mm. After 35 days, all were moved to one location where low-level exposure continued 11 months. After nine to 12 months, cranial M. cerebralis burdens among R groups were 10-100 times greater than those in the larger SRC groups, and 2-10 times greater than the smaller SRC group. Survival of the larger SRC was much better than the three smaller groups. At a given exposure site, there was no difference in survivorship or burden.
Funding Period: 1998-1999
Final Report: Nehring_98-99.pdf
Dataset(s) associated with this project:

There are no datasets associated with this project.