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Filtering by: Subject Anadromous fishes -- Oregon -- John Day River Committee Member Reeves, Gordie

Description and prediction of broad-scale spatial variability in expression of anadromy in female Oncorhynchus mykiss in the John Day River, Oregon, USA

Creator:

Mills, Justin S.

Abstract:

Partial migration is a common migratory behavior where some individuals in a population migrate and others do not. Patterns of partial migration can vary dramatically, especially for species that inhabit a wide range of environments. I described and predicted spatial variation in marine migration (anadromy) of female Oncorhynchus mykiss (steelhead...

Resource Type:

Masters Thesis

Full Text:

-migratory or anadromous migrations in Oncorhynchus mykiss within the John Day River, Oregon. Individuals
Early maturing males in a partially migratory population of anadromous and resident rainbow trout Oncorhynchus mykiss: influences of individual condition and stream temperature

Creator:

McMillan, John R.

Abstract:

Alternative male phenotypes in salmonine fishes arise from individuals that mature as either larger and older anadromous marine-migrants or as smaller and younger freshwater residents. Variability in age and size of males at maturity is hypothesized to be preceded by early differences in growth in size and lipid storage. Water...

Resource Type:

Masters Thesis

Full Text:

(Oncorhynchus mykiss). I conducted this study in the John Day River basin in northeast Oregon where both