4 Works

Data from: Effects of increased flight on the energetics and life history of the butterfly Speyeria mormonia

Kristjan Niitepõld & Carol L. Boggs
Movement uses resources that may otherwise be allocated to somatic maintenance or reproduction. How does increased energy expenditure affect resource allocation? Using the butterfly Speyeria mormonia, we tested whether experimentally increased flight affects fecundity, lifespan or flight capacity. We measured body mass (storage), resting metabolic rate and lifespan (repair and maintenance), flight metabolic rate (flight capacity), egg number and composition (reproduction), and food intake across the adult lifespan. The flight treatment did not affect body...

Data from: Early warning signals of extinction in deteriorating environments

John M. Drake & Blaine D. Griffen
During the decline to extinction, animal populations may present dynamical phenomena not exhibited by robust populations. Some of these phenomena, such as the scaling of demographic variance, are related to small size, whereas others result from density-dependent nonlinearities. Although understanding the causes of population extinction has been a central problem in theoretical biology for decades, the ability to anticipate extinction has remained elusive. Here we argue that the causes of a population’s decline are central...

Data from: Spatially variable habitat quality contributes to within-population variation in reproductive success

Blaine D. Griffen & Alexandra P. Norelli
Variation in habitat quality is common across terrestrial, freshwater, and marine habitats. We investigated how habitat quality influenced the reproductive potential of mud crabs across 30 oyster reefs that were degraded to different extents. We further coupled this field survey with a laboratory experiment designed to mechanistically determine the relationship between resource consumption and reproductive performance. We show a >10-fold difference in average reproductive potential for crabs across reefs of different quality. Calculated consumption rates...

Data from: Selection on incremental variation of eye size in a wild population of Daphnia

Christopher S. Brandon, Tiesha James & Jeffry L. Dudycha
Several studies of eye morphology have analyzed macroevolutionary patterns in the diversity of eyes, and though these studies are often linked to environment or behavior, they provide only indirect evidence of selection. Specific data to show the microevolutionary potential for adaptation by natural selection in eye morphology has been lacking. We document directional selection on eye size, an important determinant of visual capabilities, in a wild population of the freshwater microcrustacean Daphnia. We show that...

Registration Year

  • 2015

Resource Types

  • Dataset


  • University of South Carolina
  • Stanford University
  • University of Georgia
  • Rocky Mountain Biological Laboratory