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

12.7K
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.
12.7K
Impact of Groups on Individuals01:28

Impact of Groups on Individuals

132
Groups play a fundamental role in shaping individual behavior, as they establish norms that guide interactions and decision-making. Social psychology examines how individuals conform to group expectations, often adjusting their attitudes and actions to align with group norms. These norms can be formal, such as workplace policies, or informal, such as unspoken social expectations within a fraternity.Conformity and Social InfluenceConformity arises when individuals modify their behaviors or...
132
Migration00:53

Migration

8.2K
Migration is long-range, seasonal movement from one region or habitat to another. This common strategy, carried out by many different organisms around the world, is an adaptive response that typically corresponds to changes in an organism’s environment, like resource availability or climate. Migrations can involve huge groups of thousands of animals as well as single individuals traveling alone and can range from thousands of kilometers to just a few hundred meters.
8.2K
Impact of Groups on Groups01:19

Impact of Groups on Groups

77
Social psychologists analyze how groups influence one another, shaping social structures and interactions through both cooperation and competition. These dynamics manifest in various ways, ranging from economic partnerships to intergroup conflicts that shape societal structures and perceptions.Cooperation and Competition in Intergroup RelationsIntergroup relationships vary across contexts, sometimes fostering cooperation and mutual benefit while at other times leading to conflict and...
77
Testing a Claim about Mean: Unknown Population SD01:21

Testing a Claim about Mean: Unknown Population SD

4.4K
A complete procedure of testing a hypothesis about a population mean when the population standard deviation is unknown is explained here.
Estimating a population mean requires the samples to be approximately normally distributed. The data should be collected from the randomly selected samples having no sampling bias. There is no specific requirement for sample size. But if the sample size is less than 30, and we don't know the population standard deviation, a different approach is used;...
4.4K
Frequency-dependent Selection01:21

Frequency-dependent Selection

22.5K
When the fitness of a trait is influenced by how common it is (i.e., its frequency) relative to different traits within a population, this is referred to as frequency-dependent selection. Frequency-dependent selection may occur between species or within a single species. This type of selection can either be positive—with more common phenotypes having higher fitness—or negative, with rarer phenotypes conferring increased fitness.
22.5K

You might also read

Related Articles

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

Sort by
Same author

Hunting by humans affects the navigation of two endangered mammals in Zimbabwe and Brazil.

Scientific reports·2026
Same author

Can I Have a Bite? The Influence of Infant Begging on Food Sharing in Capuchin Monkeys (Sapajus Libidinosus).

American journal of primatology·2026
Same author

Bimanual Coordination and Right-Hand Bias in Extractive Foraging by Wild Sapajus libidinosus.

American journal of primatology·2026
Same author

Monkey Meltdowns: Do Tantrums Influence Maternal Investment in Bearded Capuchin Monkeys?

Developmental psychobiology·2026
Same author

Get over here: black capuchin monkeys use long-range vocalizations to adjust the distance between individuals.

Primates; journal of primatology·2026
Same author

Patrícia Izar.

Current biology : CB·2026

Related Experiment Video

Updated: Nov 1, 2025

Assessment of Social Cognition in Non-human Primates Using a Network of Computerized Automated Learning Device ALDM Test Systems
08:42

Assessment of Social Cognition in Non-human Primates Using a Network of Computerized Automated Learning Device ALDM Test Systems

Published on: May 5, 2015

12.3K

Black capuchin monkeys dynamically adjust group spread throughout the day.

Vitor Luccas1, Patrícia Izar2

  • 1Department of Experimental Psychology, Institute of Psychology, University of São Paulo, São Paulo, Brazil. vitor_luccas@yahoo.com.br.

Primates; Journal of Primatology
|June 27, 2021
PubMed
Summary

Black capuchin monkeys dynamically adjust their group spread throughout the day, typically maintaining an average distance of 36 meters. This variation in spacing is influenced by foraging activities, particularly when eating fruit.

Keywords:
Atlantic ForestFruit competitionGroup spreadSapajus nigritus

More Related Videos

Behavioral Assessment of Manual Dexterity in Non-Human Primates
16:00

Behavioral Assessment of Manual Dexterity in Non-Human Primates

Published on: November 11, 2011

22.6K
Author Spotlight: Marmoset Research - Scope and Challenges
04:52

Author Spotlight: Marmoset Research - Scope and Challenges

Published on: June 9, 2023

2.2K

Related Experiment Videos

Last Updated: Nov 1, 2025

Assessment of Social Cognition in Non-human Primates Using a Network of Computerized Automated Learning Device ALDM Test Systems
08:42

Assessment of Social Cognition in Non-human Primates Using a Network of Computerized Automated Learning Device ALDM Test Systems

Published on: May 5, 2015

12.3K
Behavioral Assessment of Manual Dexterity in Non-Human Primates
16:00

Behavioral Assessment of Manual Dexterity in Non-Human Primates

Published on: November 11, 2011

22.6K
Author Spotlight: Marmoset Research - Scope and Challenges
04:52

Author Spotlight: Marmoset Research - Scope and Challenges

Published on: June 9, 2023

2.2K

Area of Science:

  • Primatology
  • Behavioral Ecology
  • Animal Social Dynamics

Background:

  • Group spread influences communication, activity synchrony, and collective decision-making in animal societies.
  • Previous research often analyzed group spread at broad temporal scales, overlooking daily fluctuations.

Purpose of the Study:

  • To investigate the diurnal variation in group spread for a group of black capuchin monkeys (Sapajus nigritus).
  • To understand how daily activities and spatial distribution patterns change over time.

Main Methods:

  • Measuring group spread as the distance between the two most distant individuals every 5 minutes over entire days.
  • Utilizing time series analysis to examine short-term variations in group spread.

Main Results:

  • Group spread exhibited significant variation within short time intervals (15 minutes) throughout the day, averaging 36 meters.
  • Monkeys adjusted interindividual distances, decreasing it when spread was >36m and increasing it when <36m.
  • Group spread was notably larger during fruit-eating activities compared to other behaviors.

Conclusions:

  • Diurnal variation in group spread may indicate competition for dispersed food resources.
  • Dynamic adjustments in group cohesion likely facilitate social contact resumption among individuals.