598 results — topic: Insect Ecology
Data from: The effect of repeated, lethal sampling on wild bee abundance and diversity
1. Bee pollinators provide a critical ecosystem service to wild and agricultural plants but are reported to be declining world-wide due to anthropogenic change. Long-term data on bee abundance and diversity are scarce, and the need for additional quantitative sampling using repeatable methods has be
Data from: Quantifying direct vs. indirect effects of nectar robbers on male and female components of plant fitness
1. Plants interact simultaneously with both mutualists and antagonists. While webs of plant-animal interactions in natural systems can be highly complex, most interactions can be simplified into those that are either direct (mediated through pairwise interactions) or indirect (mediated through third
Nectar dispersion and bumblebee foraging in <i>Delphinium nelsonii</i>
The coevolution of <i>Euphydryas chalcedona</i> butterflies and their larval host plants. II. Maternal and host plant effects on larval growth, development, and food-use efficiency
Adaptation at specific loci. III. Field behavior and survivorship differences among Colias PGI genotypes are predictable from in vitro biochemistry
Adaptation at specific loci. II. Demographic and biochemical elements in the maintenance of the Colias PGI polymorphism
ABSTRACT Demographically oriented sampling in the wild and biochemical study of allozymes in the laboratory have been used to probe maintenance of the phosphoglucose isomerase polymorphism of Colias butterflies.—The several alleles at this locus show negative or no covariation among their frequencie
Sources of intraspecific variation in the hostplant seeking behavior of Colias butterflies
Females tended to specialize upon one or two species, at least in the short term, and the pattern of oligophagy for the population as a whole is partly generated by variation in the host-seeking behavior of individual females.
Concentration of glucosinolates in relation to habitat and insect herbivory for the native crucifer Cardamine cordifolia
It is suggested that the insect herbivore guild on Cardamine cordifolia responds to concentration and composition of glucosinolates and exerts its greatest pressure on plants with lower concentrations.
Thermoregulatory strategies in Colias butterflies: thermal stress and the limits to adaptation in temporally varying environments
As a case study of adaptive strategies in temporally varying environments, thermoregulation in three populations of Colias butterflies along an elevation gradient in Colorado is studied in relation to the fluctuating meteorological environment. Emphasis is placed on short time scale (15-300 s) varia
Thermoregulation and flight in Colias butterflies: elevational patterns and mechanistic limitations
This study identifies the physical determinants of thermoregulation in Colias, develops and tests models that predict the patterns of body temperature and flight activity along an elevational gradient, and explores the relationship of the thermoreGulatory characteristics to these patterns among Coli
Emergence patterns in male butterflies: a hypothesis and a test
A game theoretical model is advanced to explain the emergence time schedule of male butterflies under temporal “apostatic” selection, so that males emerging on different days enjoy equal fitness in evolutionary equilibrium.
Ecological significance of flight activity in Colias butterflies: implication for reproductive strategy and population structure
The observed differences in catchability between sexes is also correlated with the sexual differences in flight behavior reported here, and the time spent in flight, short life expectancies, and time budgets of Colias suggest that the time available for flight activity during an individual's lifetim