Vaccination with Vibrio anguillarum by oral administration
during copper exposure and intraperitoneal injection prior to copper
exposure was employed to investigate the effects of copper upon survival
and the immune response of juvenile coho salmon (Oncorhynchus
kisutch). Following copper exposure the survivors were challenged
under natural conditions to V. anguillarum,...
Decimation and interpolation is shown to be an effective technique
for reducing the storage requirements for bandlimited time series.
Interpolation and decimation is theoretically developed using z-transform
theory and graphically interperted. A sequence of data acquired by sampling
a sonar signal is used to demonstrate the effects of decimation. Using...
Oregon Department of Fish and Wildlife trout broodstocks from Alsea, Cole Rivers, Klamath, Leaburg, Oak Springs, Roaring River and Willamette Fish Hatcheries were examined for the presence of myxosporidans. Wild fish collected from waters above these hatcheries were also examined. Seven species of myxosporidans were observed in the hatchery broodfish:...
The virulence of selected isolants of infectious hematopoietic
necrosis virus (IHNV) were differentiated and correlated with
electrophoretic mobilities of virion structural proteins by sodium
dodecylsulfate polyacrylamide gel electrophoresis. A type 1
electropherotype of IHNV was more virulent for kokanee salmon
(Oncorhynchus nerka) and a type 2 strain more virulent for...
A new Lactobacillus species is proposed to include 17 strains of a bacterium from rainbow (Salmo gairdneri) and cutthroat trout (Salmo clarki), and chinook salmon (Oncorhynchus tshawytscha). The bacterium was isolated most frequently from fish stressed by handling or spawn ing. Phenotypically, the strains belong to the family Lactobacillaceae and...
Monoclonal antibodies (Mabs) were produced against the
myxosporean parasite, Ceratomyxa shasta, and were characterized
by indirect immunofluorescent techniques, western blot analysis,
and immunoelectron microscopy. The resulting Mabs reacted
specifically with the trophozoite and sporoblast stages of the
parasite, but not with the mature spore, indicating that certain
antigens are stage-specific....
A model reduction method for stable, linear, time-invariant,
continuous systems is critically studied. This
method, proposed by Prof. Ouyang, is based on the concept
of power dispersion and the least-squared estimation
technique. The reduced models obtained by this method retain
the stability of the stable, high order original systems and...
An adaptive pitch axis autopilot design procedure is presented. The
design procedure is applicable to both stable and unstable pitch axis models
and to those having nonminimum phase. The design approach assumes
the adaptive autopilot is activated after achieving level flight. It is shown a
rate-feedback compensator can be designed...
An electro-dynamic Magnetic Levitation vehicular system has been
modelled and studied. In practice, a MagLev vehicle will consist of a
number of cars which are mechanically coupled to each other. It is
reasonable to assume that each of these cars will be independently
controlled with the help of a supervisory...