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Filtering by: Subject Steelhead (Fish) -- Diseases Advisor Li, Hiram W.

Impacts of earlier emerging steelhead fry of hatchery origin on the social structure, distribution, and growth of wild steelhead fry

Creator:

Noble, Sandra M. (Sandra Marie)

Abstract:

Newly emerged steelhead fry (Oncorhynchus mvkiss) of hatchery and wild origins were studied in laboratory stream channels and natural streams. Objectives of the study were to determine if and how earlier emerging hatchery fry influence the emigration, realized densities, growth, habitat use, social structure, and activity patterns of localized populations...

Resource Type:

Masters Thesis

Full Text:

Impacts of Earlier Emerging Steelhead Fry of Hatchery
A phenotypic comparison of thirty-eight steelhead (Oncorhynchus mykiss) populations from coastal Oregon

Creator:

Hatch, Keith Martin

Abstract:

An aspect of the genetic structure of coastal Oregon steelhead was explored and found to gradually change in a north to south pattern for the allelic frequencies of several enzymes. Isocitrate dehydrogenase and superoxide dehydrogenase were the clearest examples of this pattern of variation. This pattern was most evident in...

Resource Type:

Masters Thesis

Full Text:

juvenile steelhead differed in spotting pattern on the dorsal fin, the more southern fish tending to be
Seasonal life history of Oncorhynchus mykiss in the South Fork John Day River Basin, Oregon

Creator:

Tattam, Ian A.

Abstract:

Understanding seasonal changes in growth, survival, and movement rates is crucial to salmonid management. These life history characteristics provide a context for evaluation of management actions. We evaluated the life history of individually marked Oncorhynchus mykiss gairdneri in the South Fork John Day River basin in Northeastern Oregon. This thesis...

Resource Type:

Masters Thesis

Full Text:

fish. This was inferred from the lack of steelhead spawning activity upstream of this canyon area in