Black rockfish (Sebastes melanops) is an important marine recreational species throughout the Pacific Northwest. Recent catch data indicate a trend of age-truncation in the black rockfish population off the Oregon coast, with older females rapidly disappearing from the population. In populations with broad age distributions, older fish may contribute disproportionately...
Empirical evidence indicates that environmental fluctuations have important effects on fisheries production. However, existing analytical solutions of stochastic fisheries models have been produced only under highly simplified economic and biological conditions. The main contribution of this paper is to derive under general conditions a policy function for the management of...
The passing of the 21st Amendment to the United States Constitution has given to individual states the authority to regulate the sale, distribution and taxation of domestically produced wines, and made the wine trade potentially significant as a means of augmenting state revenues. In the state of Oregon, table wines...
From 1996 through 1998 I collected mature female black rockfish off Oregon and examined ovaries and otoliths to estimate weekly, age-specific larval production. In all reproductive seasons, older black rockfish extruded larvae earlier in the season, followed by progressively younger fish. Each year, beginning in May, I collected young-of-the-year (YOY)...
During Pliocene time a cluster of basaltic and basaltic andesite shield volcanoes was built in the
Three Sisters region. Included in this cluster are the North Sister, Little Brother, Husband, Wife,
Sphinx and Broken Top, the radial dikes and conduit fillings of which have been laid bare by
glacial erosion....
This thesis explores the mechanical properties of hemp fiber reinforced polylactic acid (PLA) composites. Fused filament fabrication (FFF) was used to compare the performance of three different weight percentages of hemp fiber reinforced PLA against PLA and acrylonitrile butadiene styrene (ABS). It was found that as the weight percentage of...
Past experiences have relevant truths for the present. An uncommon work
and living situation from this writer's undergraduate days shows how prejudice and
stereotype can be subtly arranged, and participated in, by the nature of his
surroundings. This thesis explores, through the combination of related past events
with an interspersed...