Chum salmon (Oncorhynchus keta) were artificially
infected with erythrocytic necrosis virus (ENV) to study
the physiological and hematolgical consequences of ENV-infection.
Infected and control fish were held in
pathogen-free seawater and sampled weekly for five weeks.
Physiological tests included plasma cortisol, glucose,
protein, and osmolality, blood lactic acid, and liver...
The primary objective of this study was to identify
and investigate the underlying basis for variation in the
volume of exports of Canadian chum salmon during 1954-1975
period. A number of factors thought to be of importance
in the determination of the volume of exports of chum
salmon were hypothesized....
The effects of temperature and ration on growth, food consumption, and food conversion efficiency of chum salmon, Oncorhynchus keta, in sea water were studied in two experiments conducted during the spring, summer, and fall, 1973, at the Oregon State University Marine Science Center, Newport, Oregon. The test temperatures
employed in...
Within the tested range of 1000 - 7000 eyed eggs/ft² gravel substrate (1.08 - 7.53 eggs/cm²), the optimum stocking density for chum salmon (Oncorhynchus keta) eggs in shallow matrix substrate incubators occurred at 3000 - 4000 eggs/ft². Premature fry, which predominated early emergence, showed greater variability in lipid content than...
Estuarine residence and growth of juvenile chum salmon
(Oncorhynchus keta) from Netarts Bay, Oregon were estimated
from daily-formed growth increments of sagittal otoliths
which are distinguishable from accretion patterns formed
during freshwater residence. Estuarine residence time was
inversely related to the average size at which juvenile chum
salmon entered Netarts...
The detection and antigenic nature of the causative Corynebacterium
of bacterial kidney disease and chemotherapy of this disease
in juvenile coho salmon (Oncorhynchus kisutch) were examined.
Each of 207 yearling coho salmon collected from a population
undergoing a severe epizootic of bacterial kidney disease were examined
for the presence of...
An oral vaccine was developed for control of vibriosis
in Pacific salmon. The vaccine consists of a lyophilized
sonicate of cells of Vibrio anguillarum, the causative
agent of this disease. The preparation was incorporated
into a ration and fed to salmon in fresh water before the
fish were transported and...
Juvenile coho salmon (Oncorhynchus kisutch) of three transferrin
genotypes (AA, AC and CC) were experimentally infected with the
causative agent of bacterial kidney disease (BKD) and mortalities
observed. Six experimental and control groups were used:
(1) bacteria-infected + no Fe⁺³ ; (2) bacteria-infected + low Fe⁺³
levels; (3) bacteria-infected +...
The relative resistance of the coho salmon (Oncorhynchus kisutch) and the chinook salmon (O. tshawyscha) to the parasitic larvae (glochidia) of the freshwater mussel (Margaritifera margaritifera) was studied in an attempt to determine why the coho appeared to be more resistant. Natural and acquired antibody was sought in the mucus...