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Related Concept Videos

Predator-Prey Interactions02:39

Predator-Prey Interactions

Predators consume prey for energy. Predators that acquire prey and prey that avoid predation both increase their chances of survival and reproduction (i.e., fitness). Routine predator-prey interactions elicit mutual adaptations that improve predator offenses, such as claws, teeth, and speed, as well as prey defenses, including crypsis, aposematism, and mimicry. Thus, predator-prey interactions resemble an evolutionary arms race.Although predation is commonly associated with carnivory, for...
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Types of Selection

Natural selection influences the frequencies of particular alleles and phenotypes within populations in several different ways. Primarily, natural selection can be directional, stabilizing, or disruptive. Directional selection favors one extreme trait and shifts the population towards that phenotype while selecting against individuals displaying alternate traits. Stabilizing selection favors an intermediate trait with a narrow range of variation. Deviation from the optimal phenotype towards an...

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Related Experiment Video

Updated: Jul 2, 2026

Manipulation of Color Patterns in Jumping Spiders for Use in Behavioral Experiments
09:03

Manipulation of Color Patterns in Jumping Spiders for Use in Behavioral Experiments

Published on: May 21, 2019

Dazzle coloration and prey movement.

Martin Stevens1, Daniella H Yule, Graeme D Ruxton

  • 1Department of Zoology, University of Cambridge, Downing Street, Cambridge CB2 3EJ, UK. ms726@cam.ac.uk

Proceedings. Biological Sciences
|August 14, 2008
PubMed
Summary

Conspicuous animal markings, like zigzags, can make prey harder for predators to catch. This study provides the first experimental proof that these patterns challenge predator capture success.

Area of Science:

  • Zoology
  • Animal Behavior
  • Predator-Prey Dynamics

Background:

  • Animals possess various anti-predator traits, including camouflage, warning signals, and mimicry, to avoid predation.
  • Some animal markings may hinder successful prey capture by making speed and trajectory estimation difficult for predators, termed 'dazzle markings'.

Purpose of the Study:

  • To experimentally investigate if conspicuous animal markings, such as high-contrast patterns, reduce predator capture success.
  • To determine the effectiveness of dazzle patterns in challenging predator pursuit.

Main Methods:

  • Developed a computer game simulating predator-prey interactions, with human participants as predators.
  • Tested capture success rates of computer-generated prey with various patterns (uniform, camouflaged, high-contrast bands, zigzags) against different backgrounds and speeds.

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Main Results:

  • Uniform camouflaged targets were difficult to capture.
  • High-contrast patterns (bands, zigzags) also significantly reduced capture success.
  • Prey were harder to capture on heterogeneous backgrounds and at faster speeds.

Conclusions:

  • Provides the first experimental evidence that conspicuous patterns can make capturing moving prey more challenging.
  • Suggests that dazzle patterns may be an effective anti-predator strategy, potentially combined with other functions like camouflage or signaling.