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

Synthesis and Decomposition Reactions02:17

Synthesis and Decomposition Reactions

38.4K
Synthesis and decomposition are two types of redox reactions. Synthesis means to make something, whereas decomposition means to break something. The reactions are accompanied by chemical and energy changes. 
38.4K
Dose-Response Relationship: Selectivity and Specificity01:25

Dose-Response Relationship: Selectivity and Specificity

9.9K
Drugs exert their therapeutic effects by interacting with receptors, enzymes, or ion channels that are present throughout the human body. The strength and duration of the interaction between a drug and its target receptor are characterized by the selectivity and specificity of the drug. Selectivity refers to a drug's strong preference for its intended target over other targets. For instance, isoprenaline, a non-selective β-adrenergic agonist, interacts with both β1- and...
9.9K
Relationship Formation02:12

Relationship Formation

46.3K
What do you think is the single most influential factor in determining with whom you become friends and whom you form romantic relationships? You might be surprised to learn that the answer is simple: the people with whom you have the most contact. This most important factor is proximity. You are more likely to be friends with people you have regular contact with. For example, there are decades of research that shows that you are more likely to become friends with people who live in your dorm,...
46.3K
What is Natural Selection?01:32

What is Natural Selection?

129.8K
Natural selection is an evolutionary process in which individuals with survival-promoting traits reproduce at higher rates. These favorable traits become more common within a population or species. Naturally selected traits initially arise via random genetic mutations. In order for selection to occur, there must be variation within a population, the trait controlling the variation must be heritable, and there must be an evolutionary advantage for variation in the trait.
129.8K
Ending Relationships01:28

Ending Relationships

205
The dissolution of intimate relationships presents complex emotional and psychological challenges, particularly when emotional bonds are strong, the relationship is long-standing, and perceived alternatives are limited. This distress often intensifies in romantic breakups, where the initiator may experience greater turmoil than the rejected partner. Contributing factors include residual attachment, guilt over causing pain, and uncertainty about how to manage the situation. The stress is further...
205
Pharmacokinetic–Pharmacodynamic Relationship: Duration of Dose-Effect Relationship01:14

Pharmacokinetic–Pharmacodynamic Relationship: Duration of Dose-Effect Relationship

9
For drugs producing a quantal response, onset occurs when plasma concentration reaches a minimum effective level (Cmin). The drug's action duration depends on how long the plasma concentration remains above Cmin.Two primary factors influence this duration: dose size and the rate of drug removal from the action site. Both depend on the drug's redistribution to poorly perfused tissues and elimination processes. A larger dose promotes rapid onset and prolongs the effect's duration.Consider a...
9

You might also read

Related Articles

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

Sort by
Same author

An early-life survival and reproductive trade-off shapes selection on body size.

Evolution letters·2025
Same author

Unmeasured prior viability selection resolves the paradox of stasis for body size in wild Soay sheep.

Proceedings of the National Academy of Sciences of the United States of America·2025
Same author

Persistent maternal age effects on male offspring fitness traits in a wild mammal population.

Evolution letters·2025
Same author

Parasite-mediated inbreeding depression in wild red deer.

Heredity·2025
Same author

Density-dependent network structuring within and across wild animal systems.

Nature ecology & evolution·2025
Same author

Population density drives increased parasitism via greater exposure and reduced resource availability in wild red deer.

Parasitology·2025
Same journal

Superorganismal Anisogamy: A Comparative Test of an Extended Theory.

Evolution; international journal of organic evolution·2026
Same journal

The role of microbial resource mutualists in plant adaptation to abiotic environments.

Evolution; international journal of organic evolution·2026
Same journal

Museum genomics links MC1R alleles to adaptive winter coat color polymorphism in the long-tailed weasel.

Evolution; international journal of organic evolution·2026
Same journal

Repeated evolution of iridescence and hindwing tails is associated with morphometric flight proxies in skipper butterflies.

Evolution; international journal of organic evolution·2026
Same journal

Temperature-dependent competition predicts contrasting outcomes of adjacent secondary contact zones in darters (Percidae:Etheostoma).

Evolution; international journal of organic evolution·2026
Same journal

Sex allocation of hermaphrodites in metapopulations with frequent population extinction and recolonization.

Evolution; international journal of organic evolution·2026
See all related articles

Related Experiment Video

Updated: Feb 13, 2026

Identification and Quantification of Decomposition Mechanisms in Lithium-Ion Batteries; Input to Heat Flow Simulation for Modeling Thermal Runaway
11:25

Identification and Quantification of Decomposition Mechanisms in Lithium-Ion Batteries; Input to Heat Flow Simulation for Modeling Thermal Runaway

Published on: March 7, 2022

5.3K

Quantification and decomposition of environment-selection relationships.

Darren C Hunter1, Josephine M Pemberton2, Jill G Pilkington2

  • 1School of Biology, University of St Andrews, St Andrews, Fife KY16 9TH, United Kingdom.

Evolution; International Journal of Organic Evolution
|March 9, 2018
PubMed
Summary
This summary is machine-generated.

Ecological changes impact natural selection by altering trait distributions or fitness, even with constant trait-fitness links. New methods reveal density primarily affects sheep fitness, not selection strength, influencing evolutionary dynamics.

Keywords:
Environmental heterogeneitynatural selectionphenotypic selection coefficientsquantitative genetics

More Related Videos

Employing Transcranial Magnetic Stimulation in a Resource Limited Environment to Establish Brain-Behavior Relationships
06:05

Employing Transcranial Magnetic Stimulation in a Resource Limited Environment to Establish Brain-Behavior Relationships

Published on: April 20, 2022

2.3K
Author Spotlight: An Accurate and Quantitative Approach to Study Visual Feature Selectivity of the Optokinetic Reflex in Mice
09:28

Author Spotlight: An Accurate and Quantitative Approach to Study Visual Feature Selectivity of the Optokinetic Reflex in Mice

Published on: June 23, 2023

3.8K

Related Experiment Videos

Last Updated: Feb 13, 2026

Identification and Quantification of Decomposition Mechanisms in Lithium-Ion Batteries; Input to Heat Flow Simulation for Modeling Thermal Runaway
11:25

Identification and Quantification of Decomposition Mechanisms in Lithium-Ion Batteries; Input to Heat Flow Simulation for Modeling Thermal Runaway

Published on: March 7, 2022

5.3K
Employing Transcranial Magnetic Stimulation in a Resource Limited Environment to Establish Brain-Behavior Relationships
06:05

Employing Transcranial Magnetic Stimulation in a Resource Limited Environment to Establish Brain-Behavior Relationships

Published on: April 20, 2022

2.3K
Author Spotlight: An Accurate and Quantitative Approach to Study Visual Feature Selectivity of the Optokinetic Reflex in Mice
09:28

Author Spotlight: An Accurate and Quantitative Approach to Study Visual Feature Selectivity of the Optokinetic Reflex in Mice

Published on: June 23, 2023

3.8K

Area of Science:

  • Evolutionary Biology
  • Ecology
  • Quantitative Genetics

Background:

  • Environmental factors drive variation in natural selection over time.
  • Ecological changes can modify selection coefficients by altering trait distributions or mean individual fitness.
  • Understanding these mechanisms is crucial for predicting evolutionary trajectories.

Purpose of the Study:

  • To develop and apply novel methods for quantifying environment-selection relationships.
  • To investigate how ecological variables, specifically density, influence selection on phenotypic traits.
  • To differentiate between direct and indirect effects of ecological factors on selection.

Main Methods:

  • Extended a regression-based approach to analyze selection in a Soay sheep population.
  • Introduced a novel environmentally structured fitness function.
  • Calculated full and partial sensitivities of selection to ecological variables.

Main Results:

  • Density positively impacts viability selection on lamb mass in Soay sheep.
  • The environmentally structured fitness function revealed density's effect is mainly through mean fitness, not the trait-fitness slope.
  • This highlights indirect effects of ecological factors on selection.

Conclusions:

  • Environmental dependence of selection, particularly through mean fitness, may be common.
  • This has significant implications for understanding fluctuating selection and long-term evolutionary dynamics.
  • The developed methods offer a framework for cross-study comparisons of environment-selection links.