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Related Concept Videos

Optimal Foraging00:48

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.
What is Behavior?00:54

What is Behavior?

Behaviors are actions that an organism engages in—they can be related to finding food, reproducing, defending against threats, and many other possible actions. Behaviors include activities related to the environment around the animal—such as migration—as well as social interactions within a species or population. Many behaviors involve motor output—that is, muscle movements—while others involve less visible actions, such as learning.
What are Populations and Communities?00:30

What are Populations and Communities?

Populations are groups of individuals of the same species that inhabit a shared environment. Communities include multiple co-existing, interacting populations of different species. Metapopulations span multiple populations of the same species that occupy different areas. Metapopulations interact through immigration and emigration, providing genetic diversity that lends resilience to harsh environments. Population size and density can be estimated using quadrat and mark and recapture...
Energy Budgets and Reproductive Strategies00:51

Energy Budgets and Reproductive Strategies

Organisms must balance energy intake with the energy required for growth, maintenance, and reproduction. These trade-offs result in a variety of survivorship and reproductive strategies, including semelparity and iteroparity. Semelparous species reproduce only once in their lifetime, often investing most available resources into that single reproductive event. Iteroparous species, by contrast, reproduce multiple times over their lifetimes, typically allocating fewer resources to any single...

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Related Experiment Video

Updated: Jul 14, 2026

Foraging Path-length Protocol for Drosophila melanogaster Larvae
07:26

Foraging Path-length Protocol for Drosophila melanogaster Larvae

Published on: April 23, 2016

Can we measure carrying capacity with foraging behavior?

Douglas W Morris1, Shomen Mukherjee

  • 1Department of Biology, Lakehead University, Thunder Bay, Ontario P7B5E1, Canada. douglas.morris@lakeheadu.ca

Ecology
|May 17, 2007
PubMed
Summary

Researchers developed a simple foraging experiment to estimate a population

Area of Science:

  • Ecology
  • Population Dynamics
  • Behavioral Ecology

Background:

  • Carrying capacity is crucial for population management but difficult to estimate.
  • Behavioral responses to density are key to understanding population dynamics.
  • Existing methods for estimating carrying capacity are limited.

Purpose of the Study:

  • To develop a simple behavioral metric for estimating carrying capacity.
  • To connect optimal foraging theory with population dynamics and life history.
  • To provide a practical tool for ecologists, conservation biologists, and wildlife managers.

Main Methods:

  • Developed a model linking optimal foraging theory to density-dependent food consumption.
  • Conducted field experiments with red-backed voles at varying densities.

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The CApillary FEeder Assay Measures Food Intake in Drosophila melanogaster
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Foraging Path-length Protocol for Drosophila melanogaster Larvae
07:26

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Published on: April 23, 2016

The CApillary FEeder Assay Measures Food Intake in Drosophila melanogaster
07:42

The CApillary FEeder Assay Measures Food Intake in Drosophila melanogaster

Published on: March 17, 2017

  • Measured foraging behavior, specifically the quitting-harvest rate.

    • Main Results:

    • The model predicted adaptive, density-dependent changes in food consumption.
    • Field experiments confirmed a pronounced discontinuity in quitting-harvest rate.
    • Red-backed voles at high densities foraged at a lower rate than those at low densities.

    Conclusions:

    • A simple foraging experiment can effectively estimate carrying capacity and habitat quality.
    • Changes in harvest rates are diagnostic of populations exceeding carrying capacity.
    • This behavioral metric offers a novel approach to population management and conservation.