Functional Responses and Interference within and between Year Classes of a Dragonfly Population
- P. Crowley, E. K. Martin
- Environmental ScienceJournal of The North American Benthological…
- 1 September 1989
The laboratory results suggest that the structural complexity and alternative prey present in a previous field study greatly reduced the rate of predation by Tc2 on Tc1 larvae but did not reduce the intensity of interference among T c2 predators.
Predation, Competition, and Prey Communities: A Review of Field Experiments
- A. Sih, P. Crowley, M. McPeek, J. Petranka, K. L. Strohmeier
- Environmental Science
- 1985
RESAMPLING METHODS FOR COMPUTATION-INTENSIVE DATA ANALYSIS IN ECOLOGY AND EVOLUTION
- P. Crowley
- Mathematics
- 1992
This review focuses on four related techniques known in the statistical and biological literature as randomization (or permutation) tests, Monte Carlo methods, bootstrapping, and the jackknife, and concludes that resampling methods are well represented in ecology and evolution.
The Size-Efficiency Hypothesis and the Size Structure of Zooplankton Communities
- D. J. Hall, S. Threlkeld, C. Burns, P. Crowley
- Environmental Science
- 1 November 1976
The size-efficiency hypothesis is an attempt to explain the commonly observed inverse relationship between the abundances of small and of large-bodied herbivorous zooplankton in freshwater lakes.
Mate Density, Predation Risk, and the Seasonal Sequence of Mate Choices: A Dynamic Game
- P. Crowley, S. Travers, M. C. Linton, S. Cohn, A. Sih, R. Sargent
- Environmental ScienceAmerican Naturalist
- 1 April 1991
A computer-simulation model of mate choice, featuring two different quality groups (based on offspring per mating) in each sex, finds the opportunity for selection for mate quality is highest at intermediate densities of predators and of potential mates.
DENSITY DEPENDENCE, HATCHING SYNCHRONY, AND WITHIN-COHORT CANNIBALISM IN YOUNG DRAGONFLY LARVAE'
- Kevin R. Hopper, P. Crowley, D. Kielman
- Environmental Science
- 1996
It is concluded that when juveniles hatch asynchronously in close proximity, cannibalism can contribute to population regulation by imposing greater per capita mortality at high densities, and increase population synchrony by exerting size-specific mortality on smaller individuals throughout development.
Behavior and Ecological Interactions of Larval Odonata
- C. L. Pierce, P. Crowley, Dan M. Johnson
- Biology, Environmental Science
- 1 October 1985
The distribution of E. aspersum larvae may be limited by fish predation, but although competitive interactions were detected, there is no evidence that larval competition influences the distribution of either species.
MULTIPLE STRESSORS AND SALAMANDERS: EFFECTS OF AN HERBICIDE, FOOD LIMITATION, AND HYDROPERIOD
- Jason Rohr, A. Elskus, B. Palmer
- Environmental Science
- 1 August 2004
In general, food and atrazine levels did not interact statistically, andatrazine affected dependent variables in a standard, dose-dependent manner.
Sexual size dimorphism and sex ratios in dragonflies (Odonata)
- F. Johansson, P. Crowley, T. Brodin
- Environmental Science, Biology
- 1 December 2005
Support for Rensch's rule is found in dragonflies (Odonata) by analysing body size of 21 species and the slope of the relationship between sex ratio and size ratio was negative, suggesting that the larger sex suffers from high mortality in the larval stage, consistent with riskier foraging.
PARTITIONING COMPONENTS OF RISK REDUCTION IN A DRAGONFLY-FISH INTRAGUILD PREDATION SYSTEM
- P. Crumrine, P. Crowley
- Environmental Science, Biology
- 1 June 2003
A three-species IGP system with larvae of the dragonfly Anax junius, Plathemis lydia, and fathead minnow hatchlings as shared prey was used to estimate the contribution of the following three factors to shared-prey mortality rate in combined predator treatments.
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