Dataset Detail
Dataset: Laboratory Exposure of Chinook Salmon to TAMs
| Project: Relative Susceptibility of Selected Deschutes River, Oregon Salmonid Species to Experimentally Induced Infection by Myxobolus cerebralis
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| Dataset Abstract: A laboratory challenge model was developed to evaluate the effects of a natural M. cerebralis exposure on the susceptibility of Chinook salmon. Fry at 3 weeks post-hatch were subject to repeated doses of 5, 50 and 200 triactinomyxons. Infection severity was assessed at 5 and 11 months post-exposure for each exposure group.This dataset details spore counts, clinical disease signs and weights for 5 fish from each replicate group per exposure at 5 months. | |
| Significance of Results: This study demonstrates that resistance of Chinook salmon was not overcome by sustained exposures, suggesting that if exposure is delayed beyond the first 3 weeks post-hatch, heavy infections will not result in natural exposures. | |
| Relevance to Managers: This provides additional evidence that Chinook salmon develop a strong resistance to M. cerebralis after the first 3 weeks post-hatch. This can be applied to risk assessments for river systems with anadromous fish. | |
| Utility to Researchers: This data provides a model for challenge studies that more accurately reflect natural exposures. | |
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