Dataset Detail
Dataset: Experimental Exposure of Chinook Salmon to M.cerebralis TAMs
| Project: Relative Susceptibility of Selected Deschutes River, Oregon Salmonid Species to Experimentally Induced Infection by Myxobolus cerebralis
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| Dataset Abstract: To investigate the influence of exposure age on susceptibility to M. cerebralis in Chinook salmon, we assessed infection and disease following experimental exposures at different ages and to different doses of triactinomyxons. This data set details the spore counts for individual fish sampled at 5 months post exposure for all exposure groups. | |
| Significance of Results: This dataset provides data on susceptibility of Chinook salmon at different exposure ages and doses. The challenges indicate that Chinook salmon develop resistance to M. cerebralis more quickly than rainbow trout and indicate a low susceptibility after 3 weeks post-hatch. | |
| Relevance to Managers: Resistance to clinical whirling disease developed more rapidly in Chinook salmon than rainbow trout, indicating that if these fish avoid early exposure they are not likely to show disease effects. However, detection of myxospores in Chinook salmon exposed as juveniles raises concerns about dissemination of the parasite. The potential for infected juveniles to die and disseminate myxospores along their migratory path combined with the potential migration of infected adults into non-enzootic waters to spawn could place highly susceptible rainbow trout populations at risk if M. cerebralis became established in these waters. | |
| Utility to Researchers: Useful for assessing the risk of M. cerebralis effects in waters managed for anadromous species. | |
| Questions Generated: Do Chinook salmon present a risk for further disseminating M. cerebralis? What are the effects of exposure and infection on older fish during stressful periods like smoltification? | |
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