A taxonomic study was made on the genera Rhynchophorus and
Dynamis of the weevil family Curculionidae which includes all of the
species known to occur in the world. The bibliography lists all the
important papers published to date on the taxonomy and bionomics of
these weevils. A full synonymy is...
Environmental quality and the spatial distribution of economic activities affect each other in many ways. The primary purpose of this dissertation is to contribute to understanding the complex interrelationship and its policy implications. This dissertation consists of three essays.
The first essay examines the roles that locational amenities and increasing...
Field, screenhouse, and laboratory experiments were conducted to
study weed interference in rice grown on hydromorphic soils at the
International Institute of Tropical Agriculture (IITA) at Ibadan, Nigeria.
Rice and weeds emerged at the same time, 1 week after planting.
Weed dry weight was significantly reduced when the crop was...
The Problem
The general purpose of this study was to determine the
completeness and adequacy of student personnel services in
Negro colleges of the South Atlantic States. Specifically,
the problem was (1) to identify and analyze the nature of
student personnel practices in Negro colleges of the South
Atlantic States;...
The two major purposes of this study were: (1) to test the
assumption that the IT Scale for Children (standard-ITSC) can be used
as a measure of both appropriate sex role discrimination and sex role
preference with preschool aged children, and (2) to extend previous
studies in these areas by...
Processes of metamorphosis, settlement, and growth were examined in Pacific sanddab
using field studies and otolith microstructure. This flatfish transforms at large sizes, has a
gradual metamorphosis, and settles to a nursery on the middle continental shelf. Eye migration
takes 3 months and "metamorphosis proper" which begins after completion of...
Continental flood basalts represent short-lived but immense blasts of mafic magma to the continental crust. The youngest and smallest continental flood basalt worldwide, the Columbia River Basalt, initiated with the eruption of the most mafic member, the Steens Basalt (~16.9 Ma). The Steens Basalt is exposed in southeast Oregon, southwest...
From July 1985 to April 1987 the pelagic zooplankton community of Crater Lake, Oregon was studied to determine taxonomic structure, absolute and relative densities, and spatial and temporal distributional patterns. Samples were collected using vertically-towed zooplankton nets. The community structure consisted of two cladoceran and nine rotifer species, which were...
The research conducted here originated with the question of what caused the massive build-up of nuclear arsenals, which included ever larger and more powerful bombs and delivery systems from them, in the United States and the Soviet Union, even though the consensus beforehand was that nuclear energy should be prohibited...