Fixed chromosomal inversions can reduce gene flow and promote speciation in two ways: by suppressing recombination and by carrying locally favoured alleles at multiple loci. However, it is unknown whether favoured mutations slowly accumulate on older inversions or if young inversions spread because

The U.S. Geological Survey (USGS) developed an R package called dataRetrieval to help simplify the process of discovering and retrieving water quality sample data, streamflow, groundwater, and other data available from Federal hydrologic web services such as National Water Information Systems (NWIS)

In western North America, hummingbirds can be observed systematically visiting flowers that lack the typical reddish color, tubular morphology, and dilute nectar of "hummingbird flowers". Curious about this behavior, we asked whether these atypical flowers are energetically profitable for hummingbir

Male insects of many species donate nutrients to their females at mating, and the females can use these nutrients for egg production and somatic maintenance. These male-derived nutrients represent male investment in reproduction. The relative investment by each sex in reproduction has been postulate

Yellow-bellied marmots minimize thermoregulatory costs by concentrating activity at times when the microclimate is favorable, by tolerating hyperthermia at high TA in the field, and by having a conductance lower than that predicted from body size.

THE Conservation Reserve Program (CRP) and conservation compliance provisions of the 1985 Food Security Act have had a dramatic impact in Colorado. As of May 1989, landowners in the state had enrolled more than 1.8 million acres in the CRP. Baca County, in southeastern Colorado, has the greatest num

Abstract Fourteen treatments were applied to evaluate Cooley spruce gall adelgid on heavily infested 5-6-ft Colorado blue spruce Christmas trees. Each treatment was applied on 6 Apr to 4-tree replicates. Foliar treatments were completed by using a Solo Master 412 mistblower. Treatments were applied

Click to increase image sizeClick to decrease image size Additional informationNotes on contributorsRobert StouferRobert Stoufer, a long-time mineral collector, owns a mineral and gift shop in Ouray, Colorado.Tom RosemeyerTom Rosemeyer, owner of Red Mountain Exploration, writes the "Through the 'Sco

Summary Reservoir characterization and simulation of natural gas production were used to assess the production potential for an extension area within the Piceance Creek basin (Garfield County, CO). Many of the basin's reservoirs are lenticular sands characterized as having low porosities, low permea

Otero County, situated on the High Plains of eastern Colorado, typifies many rural agricultural counties. This article surveys its history, demography, and social economy during the period from its formation in 1889 to 1987. It compares the county's demographic changes with those of the state and pr

Small vertebrates were recovered from the matrix encasing specimens of giant sauropod dinosaurs (Supersaurus, Ultrasaurus, Dystylosaurus) collected from the “Dry Mesa” Quarry (Brushy Basin Member, Morrison Formation, western Colorado). Most of the remains appear to pertain to a single form of pterod

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Gabbroic dyke and syenitic plug intrusives have been sampled and studied across Huerfano Butte. Petrography and geochemical analyses were performed on selected specimens; from these analyses chemical variation diagrams have been prepared. Crystal Size Distribution analyses have been done on magnetit

Coal Creek can come back to life, with fish once more in residence, after a major restoration job. The project, already underway, is expected to take less than three years to complete. It is a major commitment by AMAX Inc. as the company explores the possibility of opening a molybdenum mine at Mt. E

James P. Walsh. Amax Environmental Services Inc. February 1980. Map.

James P. Welsh. June 1980. Amax Environmental Services.

Keith L. Dossey. Montrose-Gunnison County Executive Director. February 21, 1980.