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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.

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.

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.

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...

Habitat Fragmentation

Habitat Fragmentation

Habitat fragmentation describes the division of a more extensive, continuous habitat into smaller, discontinuous areas. Human activities such as land conversion, as well as slower geological processes leading to changes in the physical environment, are the two leading causes of habitat fragmentation. The fragmentation process typically follows the same steps: perforation, dissection, fragmentation, shrinkage, and attrition.

Limits to Natural Selection

Limits to Natural Selection

Organisms that are well-adapted to their environment are more likely to survive and reproduce. However, natural selection does not lead to perfectly adapted organisms. Several factors constrain natural selection.

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Related Experiment Video

Updated: Nov 5, 2025

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

Predation landscapes influence migratory prey ecology and evolution.

Megan C Sabal¹, Mark S Boyce², Corie L Charpentier³

¹University of California Santa Cruz, Department of Ecology and Evolutionary Biology, Santa Cruz, CA 95060, USA.

Trends in Ecology & Evolution

|May 17, 2021

Summary

Migratory prey navigate complex predation risks, relying on social cues and energy management to survive. Human activities significantly impact these animals, necessitating conservation strategies.

Keywords:

anthropogenic change antipredator behavior migration predation risk

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Area of Science:

Ecology
Animal Behavior
Conservation Biology

Background:

Migratory species face spatially diverse predation pressures throughout their life cycles.
Navigating variable predation landscapes influences prey risk perception, anti-predator behaviors, and mortality rates.

Purpose of the Study:

To explore how migratory prey perceive and respond to spatially variable predation.
To understand the influence of migration energetics and social information on anti-predator strategies.
To assess the impact of human activities on migratory prey's risk perception and mortality.

Main Methods:

Review of existing literature on migratory prey behavior and predation.
Analysis of factors influencing risk perception, including predator cues and social learning.
Examination of energetic constraints on anti-predator responses during migration.
Assessment of human impacts on migratory prey populations.

Main Results:

Variable and novel predator cues can impair accurate risk assessment in migrants.
Migrants utilize social information and learning to compensate for limited individual risk perception.
Energetic demands significantly shape context-dependent anti-predator responses.
Human activities alter predation risk and anti-predator behaviors, impacting migratory populations.

Conclusions:

Migratory prey employ diverse strategies to balance survival and energetic costs amidst predation.
Understanding and managing human-wildlife interactions is crucial for migratory prey conservation.
Conservation efforts must consider the complex interplay of migration, predation, and human influence.