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Predator-Prey Interactions

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.

Optimal Foraging

Optimal Foraging

How animals obtain and eat their food is called foraging behavior. Foraging can include searching for plants and hunting for prey and depends on the species and environment.

Frequency-dependent Selection

Frequency-dependent Selection

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Migration

Migration

Migration is long-range, seasonal movement from one region or habitat to another. This common strategy, carried out by many different organisms around the world, is an adaptive response that typically corresponds to changes in an organism’s environment, like resource availability or climate. Migrations can involve huge groups of thousands of animals as well as single individuals traveling alone and can range from thousands of kilometers to just a few hundred meters.

Epiphytes, Parasites, and Carnivores

Epiphytes, Parasites, and Carnivores

Plants often form mutualistic relationships with soil-dwelling fungi or bacteria to enhance their roots’ nutrient uptake ability. Root-colonizing fungi (e.g., mycorrhizae) increase a plant’s root surface area, which promotes nutrient absorption. While root-colonizing, nitrogen-fixing bacteria (e.g., rhizobia) convert atmospheric nitrogen (N2) into ammonia (NH3), making nitrogen available to plants for various biological functions. For example, nitrogen is essential for the...

Fixed Action Patterns

Fixed Action Patterns

A fixed action pattern (FAP) is a specific, hard-wired sequence of behaviors that occurs in response to an external stimulus, called a sign stimulus. The behavior is “fixed” because it is essentially unchangeable—proceeding similarly across individuals of a species every time it occurs.

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Related Experiment Video

Updated: Jan 9, 2026

A Real-Time Interactive System for Studying Confrontational Pursuit Behavior in Rodents

A Real-Time Interactive System for Studying Confrontational Pursuit Behavior in Rodents

Published on: May 16, 2025

Raptor Perception of Mismatch in Seasonally Polyphenic Prey.

Amanda Emmel, Nate Bickford, L Scott Mills

The American Naturalist

|December 5, 2025

Summary

This summary is machine-generated.

Prey camouflage mismatch increases predator detection of stationary models, but not moving ones. Unequal predation risk for mismatched white and brown morphs suggests potential fitness differences under climate change.

Keywords:

antipredator camouflage mismatch polyphenism predator-prey

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Area of Science:

Ecology
Evolutionary Biology
Animal Behavior

Background:

Predator-prey interactions are shaped by prey camouflage, behavior, and habitat.
Seasonally polyphenic prey face heightened predation risk due to camouflage mismatch with decreasing snow cover.

Purpose of the Study:

To experimentally evaluate how raptors perceive prey lures based on color and background.
To assess the influence of motion and habitat on predator attack distance.

Main Methods:

Falconry-trained goshawks (Accipiter atricapillus) were used to test perception of white and brown lures on snowy and bare ground.
Attack distances were measured in relation to lure type, motion, and habitat (open vs. forest).

Main Results:

Camouflage mismatch affected raptor detection of stationary models but not moving lures.
Attack distances were greater in open habitats than in forests.
White lures mismatched with the ground were detected more easily than mismatched brown lures.

Conclusions:

Predation risk is unequal for mismatched white and brown morphs of seasonally polyphenic prey.
Behavior, such as movement, can mitigate camouflage mismatch risks.
Results have implications for fitness differences in morphs under climate change scenarios.