Salinity, temperature, oxygen, phosphate, nitrate and silicate
observations were taken by Oregon State University on 17 hydrographic
cruises in the Northeastern Pacific Ocean during 1966. Alkalinity, pH
and total CO2 were taken on special occasions. Nine cruises were
taken along the Newport line. The rest were special cruises made
off...
A study of the population ecology of Columbia River fall chinook
salmon, Oncorhynchus tshawytscha (Walbaum), was made in an attempt
to determine the cause of a serious decline in this run which occurred
in the early 1950's. Fluctuations in abundance of major salmon runs
the North Pacific were examined to...
Food habits and biology of five species of Pleocoma larvae were
studied at a dozen forested sites in western Oregon between May 1960
and December 1961.
First instar Pleocoma hatch in late summer and moult to second
instars in early fall. Second and subsequent instars moult annually
between mid-summer and...
Land useable for livestock grazing in the western United States is
diminishing because of spreading municipalities, irrigation developments,
highway construction, recreational demands and withdrawals.
Concurrently, the demand for livestock and livestock products is increasing
because of a rapidly growing population. As a result, production
from the grazing land that remains...
Because of the complicated form of the diffusion equation,
approximations are necessary to treat the energy dependence for
practical problems. The standard model is the few group approximation.
A second approximate form, the overlapping group or modal
method, is examined and more fully developed in this work to provide
an...