A study of the host range and distribution of ticks and chiggers
(Acari) was undertaken in two contrasting forested areas of western
Oregon. Acarines were sampled from host mammals which were
trapped along line transects laid out in both areas, each consisting of
18 stations 50 feet apart. Hosts were...
The primary purpose of this study was to explore the relationships
between the variables of sex, age, sibling status, age relationship
of sibling, age spacing between siblings and sex-role preference among
preschool-aged children.
Seventy-one children, 32 boys and 39 girls, ranging in ages
from two-years-eleven-months to five-years-seven-months, served
as subjects....
Salmonid run sizes are strongly affected by their early marine stage. Fully understanding the life history of salmonids means understanding how they interact with their marine environment and with other fishes. Changes in the biological and physical environment off the Columbia River region affects the distribution and abundance of predatory...
Northern anchovy (Engraulis mordax) are a dominant forage fish in the California Current large marine ecosystem (CCLME). However, little is known about northern anchovy abundance, distribution, age structure, or population fluctuations relative to ocean conditions in the eastern boundary upwelling system off the U.S. West Coast. This thesis includes three...
THE PURPOSE OF THE STUDY The major purpose of this study was to determine if there were statistically significant differences among the opinions of teachercoordinators, administrators, and guidance counselors concerning cooperative vocational education. Specifically the objectives were: (1) to determine if there were differences in the opinions of the three...
The primary objective of this study was to develop a prototype
instrument of procedures and criteria to be used by community college
s for self-analysis and evaluation purposes. The study grew out of
the recognized need to assess and improve the effectiveness and pertinence
of community college philosophies, roles and...
Early life stages of many marine and diadromous fish species use sandy beach surf zones, which occur along >50% of the world's marine coastlines. This extensive habitat can provide juvenile fishes with an abundant supply of potential prey and the ability to hide from predators in its shallow turbid waters....
Blooms of jellyfish around the world have been correlated with climatic variables related to environmental causes. Sizeable populations of large medusae, primarily Chrysaora fuscescens and Aequorea sp., appear annually in shelf waters of the Northeast Pacific Ocean. Previous research has shown that C. fuscescens is abundant seasonally in the inner...
Dramatic changes in the physical and biological conditions off Washington and Oregon, USA, have occurred since 1998, including extreme El Niño (warm) and La Niña (cool) years, high and low Columbia River flow years, a major intrusion of subarctic water, and a low oxygen event on the shelf. The occurrence...