North American bighorn sheep (Ovis canadensis) have experienced significant declines and population extirpations due to novel pathogens such as Mycoplasma ovipneumoniae. This disease continues to limit the population restoration of bighorn sheep. Therefore, understanding the demographic consequences of pathogen presence and the risk of contact between bighorn populations and potential...
The ingestion, uptake, and metabolism of liposomes by juvenile
Pacific oysters (Crassostrea gigas) were studied by several methods in
an effort to assess their potential as encapsulating agents. Liposomes
composed of egg phosphatidylcholine-cholesterol-stearylamine (7:1:2)
formed readily and appeared stable in 20°/oo seawater. Radiotracer
studies with liposomes made with ¹⁴C-labeled cholesterol...
This study investigated the private costs to individual households
of large-lot zoning policies. The study asked whether typical
zoning ordinances create shortages of small lots or small structures
and, if so, what the magnitude of the resultant welfare loss is.
The hypotheses were suggested by a theoretical model developed
to...
The physical characteristics of continental shelf waters off
Oregon during late winter and spring of 1975 are described and compared
with observations taken previously during summer. The currents
in winter are barotropic in the monthly means while in summer
the currents are baroclinic. Alongshore current fluctuations on the
time scale...
Experiments were conducted to determine if the plagiotropic
growth habit of rooted cuttings of Douglas-fir might result from a
system favoring the accumulation of indoleacetic acid in the adaxial
side of the shoot in response to vertical placement.
Actively growing excised branch terminals were subjected to
gravitational disorientation to determine...
An estimated 5.7 million Americans are currently living with the dementia stage of Alzheimer’s disease, impeding health and wellbeing for individuals diagnosed, caregivers, families, and communities across the country (Alzheimer’s Association, 2018). Studying early indicators of age-related cognitive decline and pathological cognitive impairment (e.g., Alzheimer’s disease) is crucial to inform...
Since the early 1990s, declines in northern spotted owl (Strix occidentalis caurina) populations have been documented through extensive field surveys and range-wide demographic analyses. Although loss of late-successional forest has been credited as the primary cause for spotted owl population declines, environmental variation has also been shown to influence vital...
Pheromones are chemical cues produced by organisms that affect the behavior and/or physiology of conspecifics. The orchestration of reproductive behaviors in many animals depends on the expression of sex pheromones. In insects, intraspecific variation in sex pheromone expression is commonly observed and often influences social interactions between individuals. To what...