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

Introduction to Test of Independence01:21

Introduction to Test of Independence

2.9K
In statistics, the term independence means that one can directly obtain the probability of any event involving both variables by multiplying their individual probabilities. Tests of independence are chi-square tests involving the use of a contingency table of observed (data) values.
The test statistic for a test of independence is similar to that of a goodness-of-fit test:
2.9K
Hypothesis Test for Test of Independence01:16

Hypothesis Test for Test of Independence

7.4K
The test of independence is a chi-square-based test used to determine whether two variables or factors are independent or dependent. This hypothesis test is used to examine the independence of the variables. One can construct two qualitative survey questions or experiments based on the variables in a contingency table. The goal is to see if the two variables are unrelated (independent) or related (dependent). The null and alternative hypotheses for this test are:
H0: The two variables (factors)...
7.4K
Law of Independent Assortment02:03

Law of Independent Assortment

62.4K
While Mendel’s Law of Segregation states that the two alleles for one gene are separated into different gametes, a different question of how different genes are inherited remains. For example, is the gene for tall plants inherited with the gene for green peas? Mendel asked this question by experimenting with a dihybrid cross; a cross in which both parents are homozygous for two distinct traits resulting in an F1 generation that are heterozygous for both traits.
62.4K
Independent and Dependent Sources01:18

Independent and Dependent Sources

2.6K
In electrical circuits, sources play a crucial role in providing power for the operation of the circuit. These sources can be broadly categorized into two types: independent and dependent.
Independent voltage or current sources supply a fixed amount of voltage or current, respectively, which is unaffected by other elements within the circuit. These are represented using specific symbols. Independent voltage sources are symbolized with polarities (+ and -), indicating the direction of the...
2.6K
Model-Independent Approaches for Pharmacokinetic Data: Noncompartmental Analysis00:59

Model-Independent Approaches for Pharmacokinetic Data: Noncompartmental Analysis

330
Noncompartmental analyses offer an alternative method for describing drug pharmacokinetics without relying on a specific compartmental model. In this approach, the drug's pharmacokinetics are assumed to be linear, with the terminal phase log-linear. This assumption allows for simplified analysis and interpretation of the drug's behavior in the body.
One important characteristic of noncompartmental analyses is that drug exposure increases proportionally with increasing doses. This...
330
Analysis Methods of Pharmacokinetic Data: Model and Model-Independent Approaches01:14

Analysis Methods of Pharmacokinetic Data: Model and Model-Independent Approaches

516
Drug disposition in the body is a complex process and can be studied using two major approaches: the model and the model-independent approaches.
The model approach uses mathematical models to describe changes in drug concentration over time. Pharmacokinetic models help characterize drug behavior in patients, predict drug concentration in the body fluids, calculate optimum dosage regimens, and evaluate the risk of toxicity. However, ensuring that the model fits the experimental data accurately...
516

You might also read

Related Articles

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

Sort by
Same author

Cessation of Gene Flow Associated With the Reduction of a Sexually Selected Phenotype in the Island Stag Beetle.

Molecular ecology·2026
Same author

Climate change: temperature rises and mate choice in insects.

Current opinion in insect science·2026
Same author

Insulin-like peptide has antagonistic pleiotropic effects on male combat traits and survival traits in an armed beetle.

The Journal of experimental biology·2025
Same author

Behavioural ecology in the twenty-first century.

Nature ecology & evolution·2025
Same author

Scales of risk and adaptive 'dread': an evolutionary theory of risk inflation.

Scientific reports·2025
Same author

On weapons allometry and the form of sexual selection.

Royal Society open science·2025

Related Experiment Video

Updated: Jan 24, 2026

A New Approach that Eliminates Handling for Studying Aggression and the "Loser" Effect in Drosophila melanogaster
07:19

A New Approach that Eliminates Handling for Studying Aggression and the "Loser" Effect in Drosophila melanogaster

Published on: December 30, 2015

10.1K

Loser-effect duration evolves independently of fighting ability.

Kensuke Okada1, Yasukazu Okada2, Sasha R X Dall3

  • 11 Laboratory of Evolutionary Ecology, Graduate School of Environmental Science, Okayama University , Tsushima-naka 111, Okayama 700-8530 , Japan.

Proceedings. Biological Sciences
|May 30, 2019
PubMed
Summary
This summary is machine-generated.

The duration of loser effects in contests can evolve, with a heritability of 17%. This evolution of loser effects did not correlate with changes in fighting ability in beetles.

Keywords:
contestfightingloser effectrealized heritabilitywinner effect

More Related Videos

Peering into the Dynamics of Social Interactions: Measuring Play Fighting in Rats
15:01

Peering into the Dynamics of Social Interactions: Measuring Play Fighting in Rats

Published on: January 18, 2013

15.9K
Designing Automated, High-throughput, Continuous Cell Growth Experiments Using eVOLVER
07:26

Designing Automated, High-throughput, Continuous Cell Growth Experiments Using eVOLVER

Published on: May 19, 2019

12.7K

Related Experiment Videos

Last Updated: Jan 24, 2026

A New Approach that Eliminates Handling for Studying Aggression and the "Loser" Effect in Drosophila melanogaster
07:19

A New Approach that Eliminates Handling for Studying Aggression and the "Loser" Effect in Drosophila melanogaster

Published on: December 30, 2015

10.1K
Peering into the Dynamics of Social Interactions: Measuring Play Fighting in Rats
15:01

Peering into the Dynamics of Social Interactions: Measuring Play Fighting in Rats

Published on: January 18, 2013

15.9K
Designing Automated, High-throughput, Continuous Cell Growth Experiments Using eVOLVER
07:26

Designing Automated, High-throughput, Continuous Cell Growth Experiments Using eVOLVER

Published on: May 19, 2019

12.7K

Area of Science:

  • Evolutionary biology
  • Animal behavior

Background:

  • Contest outcomes influence future competitive behavior.
  • The heritability and evolvability of winner and loser effects are not well understood.
  • Theoretical models suggest winner and loser effects evolve independently of fighting ability.

Purpose of the Study:

  • To investigate the heritability and evolvability of loser effect duration.
  • To test if fighting ability co-evolves with the duration of loser effects.

Main Methods:

  • Artificial selection was applied to replicated beetle populations.
  • Realized heritability for loser effect duration was estimated.
  • Naive fighting ability was assessed in selected populations.

Main Results:

  • The duration of loser effects was shown to be evolvable, with a realized heritability of approximately 17%.
  • No significant co-evolution was observed between fighting ability and the reduction in loser effect duration.

Conclusions:

  • Loser effect duration is an evolvable trait in the studied beetle populations.
  • Evolutionary changes in loser effect duration can occur independently of changes in fighting ability, supporting theoretical predictions.