A technique for estimating gross primary production and respiration of periphyton communities, in situ, in small turbulent streams was developed using a photosynthesis-respiration chamber in a modified "light and dark bottle" method. Trays containing portions of the substrate bearing the benthic community were embedded in the stream, level with the...
An exploratory study of 48-hour Pacific oyster embryo
bioassays employing spent sulfite liquor (SSL) in test
concentrations ranging from 10 to 45 ppm was made at two
incubation temperatures, 20° and 24° C. Fourteen separate
bioassays, each employing embryos originating from three to
four different parentages, were conducted at the...
Home range, dispersal, homing and density of Townsend's mole, Scapanus townsendii (Bachman), were studied during 1964 near Tillamook, Oregon. Additional information on the success of marking
and capture techniques and the response of moles to flooding was gathered. This study was initiated to supply information which might aid in the...
Direct observation of a known number of black-tailed deer
(Odocoileus hemionus columbianus), within the Cedar Creek study
enclosure in the Tillamook Burn, Oregon, was carried on throughout
1964. Observations were made from three huts located outside of
the enclosure on surrounding prominences. During this period,
1,410 hours of observational time...
A study was conducted at Yaquina Bay, Oregon, to determine
the age-fecundity relationships in the striped seaperch Embiotoca
lateralis. A questionnaire was sent to California, Oregon, and
Washington to ascertain what regulations were in effect, and the value
of the family Embiotocidae with regard to the sport and commercial
harvest....
The life history of juvenile sockeye salmon (Oncorhynchus nerka) resident in Chignik River, Alaska, represents a departure from the lacustrine, pelagic existence typical of juveniles of this species. For this reason, the distribution, relative abundance in different parts of the river, growth, and upstream and downstream movements of juvenile sockeye...
The fatty acids of coho salmon were identified and then a study
was conducted to determine the effects of exercise on the fatty acids
of salmon forced to swim against water velocities of 52, 54, 56, and
59 cm/sec, The shorter and lighter salmon were less competent at
a given...
Commerical preparations and published formulations using reagent chemicals for seawater substitutes were not biologically acceptable to Mytilus edulis embryos, in that calcification did not occur. When Leslie coarse hide salt was used as the source of NaCl for literature formulations, most formulas provided some success in the development, growth and...
The rainbow trout population in Elder Creek, Oregon was
studied between June 1965 and November 1966. The physical characteristics
of the stream during the summer season were described.
Rainbow trout were captured in each of three sections on the stream
by electrofishing and were tagged and measured. Population size,
mortality,...
The subject of this thesis is an evaluation of a louver facility
in the Lemhi River, Idaho. The louver facility was designed to guide
juvenile chinook salmon and steelhead trout into a trap in order to
sample downstream migrant populations. The study was designed to
determine: (1) if the catch...
Behavior and survival in fresh water were studied for three brood years of coho salmon in Sashin Creek, Alaska, from October 1963, until September 1966. Investigations of spawning adults were conducted to determine numbers of spawners, distribution on the spawning grounds, effects on pink salmon, age composition, redd life, fecundities,...