Crosses were made between a stock of summer steelhead (Salmo
gairdneri) known to be resistant to infection by Ceratomyxa
shasta and stocks of summer steelhead known to be susceptible.
Ceratomyxosis, the disease caused by C. shasta was initiated by
exposure to Willamette River water. I found that the crosses
were intermediate in susceptibility to ceratomyxosis relative to
the parental stocks. There was no difference in susceptibility
to ceratomyxosis between reciprocal crosses of the same stocks.
Persistence of moderate susceptibility in the F₂ generation of
experimental stock crosses and examples from both wild and
hatchery stocks of mixed ancestry indicate long term disease
problems may result from introductions of less adapted, foreign stocks. / Graduation date: 1987
| Identifer | oai:union.ndltd.org:ORGSU/oai:ir.library.oregonstate.edu:1957/26774 |
| Date | 15 August 1986 |
| Creators | Wade, Mark |
| Contributors | Li, Hiram |
| Source Sets | Oregon State University |
| Language | en_US |
| Detected Language | English |
| Type | Thesis/Dissertation |
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