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Filtering by: Subject Rainbow trout -- Life cycles -- Oregon -- John Day River

The influence of sex, migration distance, and latitude on expression of anadromy in Oncorhynchus mykiss

Creator:

Ohms, Haley

Abstract:

The evolution and maintenance of multiple phenotypes within populations is an interesting evolutionary and ecological question, and is becoming increasingly important for the restoration and conservation of partially migratory species. In particular, why individuals adopt a particular phenotype has been the focus of numerous research efforts. In the partially migratory...

Resource Type:

Masters Thesis
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