1,081 results — topic: Wildlife Behavior
Social Behavior and Population Dynamics of Yellow-bellied Marmots
This table contains 36 years of trapping data. Up to 12 sites were studied annually within the vicinity of Rocky Mountain Biological Laboratory, Colorado; not all sites were monitored annually. A record includes the location where the subject was trapped, along with its body mass, age, sex, and repr
Social Behavior and Population Dynamics of Yellow-bellied Marmots
This table contains 36 years of trapping data. Up to 12 sites were studied annually within the vicinity of Rocky Mountain Biological Laboratory, Colorado; not all sites were monitored annually. A record includes the location where the subject was trapped, along with its body mass, age, sex, and repr
Influence of refuging consumers (pikas: <i>Ochotona princeps</i>) on subalpine meadow vegetation
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 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
Pollinators increase the cost of sex by avoiding female flowers
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
Niche differentiation in golden-mantled ground squirrels and the least chipmunk
Foraging behavior in <i>S. lateralis</i> and <i>E. minimus</i>
Behavior of <i>Ambystoma tigrinum</i> larvae under field and laboratory conditions
Effects of flower color change on visitors of three composites
Color preference of biting flies, <i>Symphoromyia</i>
The influences on daily torpor during the summer
Females' choice of "good genotypes" as mates is promoted by an insect mating system
Can animal mating systems result in the choice of mates carrying genotypes that are otherwise favored by natural selection? This question is addressed by studying, in natural populations of Colias butterflies, how the phosphoglucose isomerase (PGI) enzyme genotype of males mating Colias females vari
Pollen transport and deposition by bumble bees in Erythronium: influences of floral nectar and bee grooming
(1) The transport of pollen from donor flowers by bumble bees was measured by examining deposition on stigmata of sequences of recipient flowers. The rate of decay of grain deposition was estimated as a measure of pollen carryover. (2) Bombus bifarius was a much less effective pollinator of Erythron