The sperm whale (Physeter macrocephalus) shows some of the most derived characteristics of any mammal: a large body size, large brain, complex social organization and a capacity for deep foraging dives that few other marine mammals can match. Despite a history of exploitation that removed hundreds of thousands of individuals,...
This study analyzes the impact of the Poultry Extension and
Training Subproject (PETS) on the village household in North Yemen.
The subproject was funded by the U.S. Agency for International
Development and implemented by Oregon State University
The primary goal of this study was to determine the impact of
the...
The interplay of natural selection and genetic drift, influenced by geographic isolation, mating systems and population size, determines patterns of genetic diversity within species. The sperm whale provides an interesting example of a long-lived species with few geographic barriers to dispersal. Worldwide mtDNA diversity is relatively low, but highly structured...
Full Text:
,*† KENDRA HOEKZEMA,† SARAH L. MESNICK,§
DANIEL ENGELHAUPT,¶ IAIN KERR,** ROGERPAYNE** and C. SCOTT BAKER
The interplay of natural selection and genetic drift, influenced by geographic isolation, mating systems and population size, determines patterns of genetic diversity within species. The sperm whale provides an interesting example of a long-lived species with few geographic barriers to dispersal. Worldwide mtDNA diversity is relatively low, but highly structured...
Full Text:
Alexander1,2,3*, Debbie Steel1,2, Kendra Hoekzema2, Sarah Mesnick4, Daniel Engelhaupt5, Iain Kerr6, Roger Payne6
The interplay of natural selection and genetic drift, influenced by geographic isolation, mating systems and population size, determines patterns of genetic diversity within species. The sperm whale provides an interesting example of a long-lived species with few geographic barriers to dispersal. Worldwide mtDNA diversity is relatively low, but highly structured...
Recently, the big sagebrush taxa has been split into subspecies
and forms. Four habitat types related to subspecies of big sagebrush
were studied in Eastern Oregon. Response of understory vegetation was
measured following three range improvement techniques implemented on
the four habitat types for several ages of treatment. Crown cover,...
Red Light Ladies presents a perspective on prostitution in North America, within the context of the western mining frontier. A biographical profile of the frontier
prostitutor is presented, along with an archaeological model of settlement patterns and material culture. Settlement patterns and demographic changes in the prostitutor
population are hypothetically...
Antarctic Ice Sheet mass balance and, hence, sea level change is affected by the floating extensions of outlet glaciers and ice streams that take up about 44% of the coastline (Drewry et al., 1982) and are referred to as "ice shelves". Ice sheet mass loss accelerates when these ice shelves...