7,660 results
Long-term individual-level population dynamics of a native desert chamaephyte
Map data and Unmanned Aircraft System imagery from the May 25, 2014 West Salt Creek rock avalanche in western Colorado
On May 25, 2014, a rain-on-snow induced rock avalanche occurred in the West Salt Creek Valley on the northern flank of Grand Mesa in western Colorado. The avalanche traveled 4.6 km down the confined valley, killing 3 people. The avalanche was rare for the contiguous U.S. because of its large size (5
Appendix A. The environmental settings of the 59 plots on the Uncompahgre Plateau in western Colorado.
The environmental settings of the 59 plots on the Uncompahgre Plateau in western Colorado.
Appendix A. The environmental settings of the 59 plots on the Uncompahgre Plateau in western Colorado.
The environmental settings of the 59 plots on the Uncompahgre Plateau in western Colorado.
A note comparing the primary structure of the arctic ground squirrel and the yellow-bellied marmot hemoglobin B chains
Hemoglobin β chains were isolated from both the arctic ground squirrel (Citellus parryii undulatus) and the yellow-bellied marmot (Marmota flaviventris). After various enzymatic and chemical cleavages, the primary structures of these β chains were determined. Only one sequence difference was found b
The primary structure of the hemoglobin chain of the arctic ground squirrel
Comparison of arctic ground squirrel hemoglobin α-chain with the amino-terminal 25 residues of the marmot shows one amino acid difference at position 13, which is similar to that of other rodent α-chains.
The evolution of plant mating systems: multilocus simulations of pollen dispersal
We simulated pollination in a plant population and explored how pollen dispersal distance and allocation among recipient individuals evolved in response to direct selection on three loci coding for dispersal phenotype and in response to indirect selection on two unlinked "genetic congruence" loci. F
Southbound through Colorado: migration of rufous hummingbirds
Within population variation in the demography of Speyeria mormonia (Lepidoptera: Nymphalidae)
The adult demography of a population of Speyeria mormonia (Lepidoptera: Nymphalidae) near Gothic, Colorado USA was studied for four years. Values of demographic parameters, including survival, dispersal and sex ratio, varied yearly, without major changes in density. Shift in sex ratio with constant
Demography of the unsilvered morph of <i>Speyeria mormonia</i> (Nymphalidae) in Colorado
Pollinators increase the cost of sex by avoiding female flowers
Pancreatic hormones in the nonhibernating and hibernating golden-mantled ground squirrel
Social dynamics of mammals: reproductive success, kinship, and individual fitness
Although kin selection has been suggested as the mechanism underlying the formation of mammalian societies, many species act as if they attempt to maximize the direct fitness component of their inclusive fitness.
Do female yellow-bellied marmots adjust the sex ratios of their offspring?
The overall sex ratio of weaned yellow-bellied marmots does not differ significantly from one. Litter size has no effect on the sex ratio of young. Stress, measured by eosinophil concentration and mirror-image stimulation, is not associated with biased sex ratios. Three-year-old females and females
Prey size selection by carnivorous stoneflies
Prey preference of stoneflies: sedentary vs. mobile prey
We investigated the effects of prey size and type (sedentary vs mobile) on prey preference in a predaceous stonefly, based on choice experiments and observations of the predator-prey interaction. We presented three size classes of black fly larvae (Prosimulium) to various sizes of the perlid stonefl
Tailing Site Comparative Investigation – Mt. Emmons Project
Amax Inc.; Colorado Department of Health Water Quality Control Division. October 1977.
Subject: Policy for Management of Wildernesses within the National Forests
M. Rupert Cutler. Department of Agriculture Office of the Secretary. August 11, 1977.
Statement for the Hearing on the Endangered American Wilderness Act H. R. 3454, Creede, Colorado
Ralph E. Clark III. June 10, 1977.
Speech by Assistant Secretary of Agriculture at the Annual Meeting of the Society of American Foesters
Arthur E. Merriman and Dr. M. Rupert Cutler. United States Department of Agriculture Forest Service. October 1977.