Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Optimal Foraging00:48

Optimal Foraging

14.1K
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.
14.1K
Parameters Affecting Nonlinear Elimination: Zero-Order Input, First-Order Absorption and Two-Compartment Model01:13

Parameters Affecting Nonlinear Elimination: Zero-Order Input, First-Order Absorption and Two-Compartment Model

377
Drugs administered through various routes can lead to nonlinear elimination, resulting in complex pharmacokinetic behaviors crucial to understanding efficacious drug dosing.
When a drug is administered through a constant intravenous infusion and eliminated via nonlinear pharmacokinetics, it follows zero-order input. For example, oral drugs undergo first-order absorption upon administration and are eliminated through nonlinear pharmacokinetics.
In the case of subcutaneously administered drugs,...
377
Mechanistic Models: Compartment Models in Algorithms for Numerical Problem Solving01:29

Mechanistic Models: Compartment Models in Algorithms for Numerical Problem Solving

376
Mechanistic models play a crucial role in algorithms for numerical problem-solving, particularly in nonlinear mixed effects modeling (NMEM). These models aim to minimize specific objective functions by evaluating various parameter estimates, leading to the development of systematic algorithms. In some cases, linearization techniques approximate the model using linear equations.
In individual population analyses, different algorithms are employed, such as Cauchy's method, which uses a...
376
Gaussian Elimination: Problem Solving01:30

Gaussian Elimination: Problem Solving

244
Systems of linear equations in several variables are pivotal in modeling complex scenarios involving multiple unknowns and constraints. Such systems are widely used in various fields to represent relationships where several conditions must be simultaneously satisfied. Each variable in the system corresponds to an unknown quantity, while each equation imposes a linear constraint, leading to a structured approach for analyzing and solving real-world problems.A system of three equations with three...
244
Modeling with Differential Equations01:25

Modeling with Differential Equations

133
Population dynamics can be described mathematically by considering the population size P(t) as a function of time. The rate of change of the population is then represented by the derivative of P(t). A simple assumption is that the rate of growth is proportional to the size of the population itself. This leads to an exponential growth model, where the population increases rapidly without bound. While this is a useful first approximation, it does not reflect realistic long-term...
133
Linear Circuits01:17

Linear Circuits

942
A linear circuit is characterized by its output having a direct proportionality to its input, adhering to the linearity property, which encompasses the principles of homogeneity (scaling) and additivity. Homogeneity dictates that when the input, also referred to as the excitation, is multiplied by a constant factor, the output, known as the response, is correspondingly scaled by the same constant factor. For instance, if the current is multiplied by a constant 'k,' the voltage likewise...
942

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Correction: Wind conditions do not consistently affect large-scale movement decisions of large savanna herbivores.

Oecologia·2026
Same author

Wind conditions do not consistently affect large-scale movement decisions of large savanna herbivores.

Oecologia·2026
Same author

Sodium constraints on megaherbivore communities in Africa.

Nature ecology & evolution·2025
Same author

Reconciling Species Concepts: An Ecological Perspective.

American journal of biological anthropology·2025
Same author

Integrating physiology into movement ecology of large terrestrial mammals.

The Journal of experimental biology·2025
Same author

Variation in herbivore space use: comparing two savanna ecosystems with different anthrax outbreak patterns in southern Africa.

Movement ecology·2023
Same journal

Unveiling the microhabitat puzzle: how spatial heterogeneity shapes cave invertebrate biodiversity across scales.

Oecologia·2026
Same journal

Soil microbial drought history affects physiological response of select tree species to drought stress.

Oecologia·2026
Same journal

Unveiling the effects of interspecific competition: ecological consequences of competitive release after damming on Salvelinus curilus populations in a three-salmonid species coexistence system.

Oecologia·2026
Same journal

Orchid bee diversity responds positively to forest cover and landscape heterogeneity in the Brazilian Savanna.

Oecologia·2026
Same journal

The impact of native vertebrates on enemy release and plant functional traits during community assembly.

Oecologia·2026
Same journal

Nutrient fluctuations alter effects of litter diversity of invasive species on native communities.

Oecologia·2026
See all related articles

Related Experiment Video

Updated: Mar 6, 2026

Palatable Western-style Cafeteria Diet as a Reliable Method for Modeling Diet-induced Obesity in Rodents
09:10

Palatable Western-style Cafeteria Diet as a Reliable Method for Modeling Diet-induced Obesity in Rodents

Published on: November 1, 2019

11.7K

Circularity in linear programming models of optimal diet.

Norman Owen-Smith1

  • 1Centre for African Ecology, Department of Zoology, University of the Witwatersrand, 2050, WITS, South Africa.

Oecologia
|March 18, 2017
PubMed
Summary
This summary is machine-generated.

Linear programming models for herbivore diets are criticized for unrealistic assumptions. This study clarifies circularity issues, showing it arises from ineffective constraints, not inherent model flaws.

Keywords:
ConstraintsDiet selectionLinear programmingOptimal foraging

More Related Videos

Protein WISDOM: A Workbench for In silico De novo Design of BioMolecules
10:58

Protein WISDOM: A Workbench for In silico De novo Design of BioMolecules

Published on: July 25, 2013

17.7K
A Do-it-yourself System for Scheduled Feeding of Laboratory Rodents in Their Home Cage
04:49

A Do-it-yourself System for Scheduled Feeding of Laboratory Rodents in Their Home Cage

Published on: June 6, 2025

1.0K

Related Experiment Videos

Last Updated: Mar 6, 2026

Palatable Western-style Cafeteria Diet as a Reliable Method for Modeling Diet-induced Obesity in Rodents
09:10

Palatable Western-style Cafeteria Diet as a Reliable Method for Modeling Diet-induced Obesity in Rodents

Published on: November 1, 2019

11.7K
Protein WISDOM: A Workbench for In silico De novo Design of BioMolecules
10:58

Protein WISDOM: A Workbench for In silico De novo Design of BioMolecules

Published on: July 25, 2013

17.7K
A Do-it-yourself System for Scheduled Feeding of Laboratory Rodents in Their Home Cage
04:49

A Do-it-yourself System for Scheduled Feeding of Laboratory Rodents in Their Home Cage

Published on: June 6, 2025

1.0K

Area of Science:

  • Ecology
  • Animal Nutrition
  • Mathematical Modeling

Background:

  • Linear programming models for optimal herbivore diets face criticism regarding biological realism, statistical success, and circularity.
  • Circularity in these models can stem from using average parameter values when constraints are not effectively limiting intake.

Purpose of the Study:

  • To clarify the issue of circularity in optimal diet models for herbivores.
  • To identify conditions under which circularity may arise, specifically related to seasonal variations and unidentified intake constraints.

Main Methods:

  • The study involves a conceptual clarification of circularity in ecological diet models.
  • It proposes criteria for evaluating hypotheses about factors controlling diet composition.

Main Results:

  • Circularity occurs when constraint lines are estimated from average parameter values and the assumed constraints are not effective.
  • Ineffective constraints can result from benign seasonal conditions (due to processing/storage costs) or unidentified limiting factors.

Conclusions:

  • To validate hypotheses on diet control, it is crucial to demonstrate that consumers appropriately respond to variations in constraint parameters.
  • Furthermore, it must be shown that the assumed constraints are operating at their maximum or minimum settings.