1,081 results — topic: Wildlife Behavior
Skewed flowering distributions and pollinator attraction
The temporal distributions of flowering by animal—pollinated plant populations, flowering curves, can be viewed profitably as resource utilization functions. A conceptual model of plant competition for pollinators suggests that selection may favor asymmetrical, positively skewed curves, and that suc
Skewed flowering distributions and bumblebees
Genetic variation in social mammals: the marmot model
The social substructure and the distribution of genetic variation among colonies of yellow-bellied marmots, when analyzed as an evolutionary system, suggests that this substructure enhances the intercolony variance and retards the fixation of genetic variation. This result supports a traditional the
Pollinator foraging behavior and gene dispersal in Senecio (Compositae)
The breeding systems and stationary spatial distributions of animal-pollinated flowering plants are consistent with Wright's models and such systems have proved excellent for the study of neighborhood size, because gene dispersal can be estimated directly by measuring pollinator movements and seed d
Optimal foraging in bumblebees: calculation of net rate of energy intake and optimal patch choice
Equations are derived for the calculation of the rate of net energy intake of a foraging bumblebee and the assumptions that form the basis of these energy equations are discussed.
Do stonefly predators influence benthic distributions in streams?
Experimental manipulations were conducted within the substrate of a Wisconsin stream and a Colorado stream to measure the effect of stonefly predators on the distribution of benthic invertebrates. Screen cages containing free predators, predators restricted from foraging, or no predators, allowed pr
Predator-prey interactions between stoneflies and mayflies: behavioral observations
Field experiments were conducted at two streams to determine the mechanisms by which mayfly prey detect and avoid stonefly predators, and to quantify the effect of stonefly predators upon mayfly behavior, distribution, and activity levels. Direct observations of the interactions between stoneflies a
The Influence of Flatworm Predation on Zooplankton Inhabiting small ponds
The amino acids of extrafloral nectar from Helianthella quinquenervis (Asteraceae)
The extrafloral nectar from involucral bracts of Helianthella quinquenervis has more nonprotein (5) and total (24) amino acids than have been reported for any other extrafloral nectar. Seven to twelve additional unknowns, probably nonprotein amino acids, were also found. The concentrations of amino
The effect of proboscis and corolla tube lengths on patterns and rates of flower visitation by bumblebees
The results indicate significant correlations between proboscis length and time spent by bees on flowers, and suggest that bumblebees of short probosc is length prefer and are more efficient on short corolla tubes.
Metabolic resource allocation vs. mating attractions: adaptive pressure on the "alba" polymorphism of Colias butterflies
Marmota flaviventris
This datasheet on Marmota flaviventris covers Identity, Distribution.