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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.Although predation is commonly associated with carnivory, for...

Optimal Foraging

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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.

Microbial Interactions: Predation

Microbial Interactions: Predation

Microbial predation refers to the process by which one microorganism kills and consumes another to obtain nutrients and energy. It encompasses both bacterial and protozoan predators. This interaction plays a crucial role in shaping microbial communities and regulating nutrient cycling.Bacterial Predators: Epibiotic vs. EndobioticBacterial predators are classified based on their mode of attack as either epibiotic or endobiotic. Epibiotic predators, such as Vampirococcus, attach to the surface of...

Life Histories

Life Histories

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Ecological Niches

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Related Experiment Video

Updated: Jun 12, 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

The functional response of a generalist predator.

Sophie Smout¹, Christian Asseburg, Jason Matthiopoulos

¹Scottish Oceans Institute & Centre for Research into Environmental and Ecological Modelling, University of St Andrews, St Andrews, United Kingdom. scs10@st-andrews.ac.uk

|June 5, 2010

Summary

Predator consumption depends on multiple prey densities, not just one. Ignoring other prey can misrepresent a predator's impact, especially for species like the hen harrier.

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A Fish-feeding Laboratory Bioassay to Assess the Antipredatory Activity of Secondary Metabolites from the Tissues of Marine Organisms

A Fish-feeding Laboratory Bioassay to Assess the Antipredatory Activity of Secondary Metabolites from the Tissues of Marine Organisms

Published on: January 11, 2015

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Last Updated: Jun 12, 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

A Fish-feeding Laboratory Bioassay to Assess the Antipredatory Activity of Secondary Metabolites from the Tissues of Marine Organisms

A Fish-feeding Laboratory Bioassay to Assess the Antipredatory Activity of Secondary Metabolites from the Tissues of Marine Organisms

Published on: January 11, 2015

Area of Science:

Ecology
Wildlife Biology
Predator-Prey Dynamics

Background:

Predator consumption rates, known as functional responses, significantly influence prey population dynamics.
Generalist predators consume multiple prey species, necessitating a multispecies functional response (MSFR) model.
Previous research often focused on single-prey functional responses, overlooking interactions in multispecies systems.

Purpose of the Study:

To develop and apply a multispecies functional response (MSFR) model for a generalist predator.
To assess the impact of alternative prey availability on predator-prey interactions.
To evaluate the effectiveness of Bayesian methods for fitting complex ecological models to field data.

Main Methods:

Utilized Bayesian statistical methods to fit an MSFR model to field data.
Analyzed data from an avian predator, the hen harrier (Circus cyaneus), and its three primary prey species.
Employed a graphical approach to visualize and interpret the MSFR model's predictions.

Main Results:

Demonstrated that ignoring alternative prey species can lead to inaccurate conclusions about predator impacts.
Identified that a 'predator pit' phenomenon for one prey species is contingent on the low availability of other prey.
Successfully fitted the MSFR model to field data, highlighting the importance of considering all prey.

Conclusions:

The Bayesian approach provides a robust and data-efficient method for fitting MSFR models.
This approach allows for flexibility in modeling over-dispersion and incorporating prior biological knowledge.
The method is particularly suitable for studying long-lived predators with potentially sparse data, aiding conservation efforts.