Declines or extinctions of the native intertidal estuary blue mud shrimp, Upogebia pugettensis, have been observed or are suspected in all of its populations over the species’ range. These declines are associated with the introduced Asian bopyrid isopod parasite, Orthione griffenis, which effectively castrates females. Baseline estimates of population abundances...
The North American host of the introduced Asian isopod parasite, Orthione griffenis, is the burrowing Blue Mud Shrimp, Upogebia pugettensis. The shrimp are the predominant species in the Yaquina Bay estuary intertidal mudflats, and are essential ecosystem engineers. The parasite effectively castrates the shrimp host without causing mortality which allows...
Unfished populations of cutthroat trout in three small coastal
streams in Oregon were studied from April of 1962 until November
of 1963. Population size, growth rate, and net production were
estimated for study areas in each stream. The nature of seasonal
movement patterns within the study areas and at fish...
Natural populations of kokanee fingerlings were studied in Odell Lake, Oregon from June 1962 to September 1963. Vertical and horizontal distributions were determined in relation to temperature, zooplankton, and light during the summer of 1963. Food habits of the fingerlings were also examined. A mid-water townet was employed for sampling...
Corneal ulcers are one of the most common eye conditions of the horse, with potentially serious complications such as loss of vision or the eye itself. They are extremely painful due to the large number of sensory nerve endings found in the cornea. Horses frequently show signs of ophthalmic pain...
The existence of eigenvalues is shown for certain types of
integral equations with continuous kernels, the proofs utilizing some
basic results of collectively compact operator approximation theory.
The nonlinear dynamic analysis of cable and membrane structures
is presented in this study. Attention is given to the nonlinearities
arising from large displacements, from nonlinear stress-strain
relationships and from nonconservative loadings.
The finite element method is used to model the cables and
membranes. Curvilinear geometries of the elements are...
