Related Experiment Video
Updated: Feb 23, 2026
08:43
Boldness, Aggression, and Shoaling Assays for Zebrafish Behavioral Syndromes
Published on: August 29, 2016
11.0K
Consistent Individual Differences Drive Collective Behavior and Group Functioning of Schooling Fish
Jolle W Jolles1, Neeltje J Boogert2, Vivek H Sridhar3
1Department of Zoology, University of Cambridge, Downing Street, Cambridge CB2 3DT, UK; Department of Collective Behaviour, Max Planck Institute for Ornithology, Am Obstberg 1, Radolfzell 78315, Germany; Department of Biology, University of Konstanz, Universitätsstrasse 10, Konstanz 78464, Germany.
Current Biology : CB
|September 12, 2017
Summary
Animal personalities, or consistent individual differences in behavior, drive group dynamics and collective actions. This study reveals how traits like sociability and boldness shape group structure, leadership, and foraging success in stickleback shoals.
Area of Science:
- Behavioral Ecology
- Collective Animal Behavior
- Animal Social Dynamics
Background:
- Consistent inter-individual differences in behavior, termed animal personalities, are widespread.
- These differences are hypothesized to influence group functioning, including decision-making, foraging, and predator avoidance.
- A unified mechanistic framework explaining how individual differences drive collective behavior is lacking.
Purpose of the Study:
- To investigate the mechanistic link between consistent inter-individual differences and emergent group behavior.
- To understand how individual behavioral types influence group structure, leadership, movement dynamics, and foraging performance.
- To develop and test a model predicting collective behavior based on individual traits.
Main Methods:
- High-resolution tracking of known behavioral types in free-swimming stickleback (Gasterosteus aculeatus) shoals.
- Quantification of individual traits: sociability (propensity to stay near others) and boldness (exploratory tendency).
- Development and application of a generic self-organizing group model incorporating individual differences.
Main Results:
- Sociability negatively correlated with swim speed, predicting spatial positioning and leadership within shoals.
- Sociability and boldness together explained individual and group foraging performance.
- A generic model demonstrated that individual differences in speed and goal-orientation naturally generate group-level states.
Conclusions:
- Consistent individual differences provide a simple mechanism for the emergence of collective behavior.
- Individual traits shape group structure, leadership, movement, and foraging capabilities.
- Individual performance is context-dependent on group composition, highlighting the role of social selection in behavioral differentiation.
Related Concept Videos
01:29Social Psychology and Individual Behavior
363
Social psychology examines how group dynamics, emotions, and cultural influences shape individual actions and decision-making. These elements interact to form behavioral patterns that affect personal choices and social interactions.The Role of Group DynamicsGroups play a crucial role in shaping behavior by reinforcing norms and expectations. Individuals derive a sense of self from group membership, often aligning their behaviors with group norms to maintain social cohesion. For example, an...
363
01:20Social Foundations of Self II: The Generalized Other
291
According to George Herbert Mead, as children progress beyond the game stage, they develop a more comprehensive understanding of societal rules and norms. This cognitive and social development enables them to internalize the expectations of the broader community, refining their ability to regulate behavior.Consistent participation in organized activities is crucial in helping children recognize that their actions are not isolated but contribute to a more significant, interconnected group...
291
01:28Impact of Groups on Individuals
405
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...
405
01:25Impact of Individuals on a Group
371
In social psychology, the interplay between individuals and groups is a central concern, particularly regarding how individual actions and characteristics influence group processes and outcomes. While much research emphasizes the group's power in shaping individual behavior, it is equally significant to understand how individuals contribute to the functioning, development, and success of groups.Individual Roles in Group Productivity and Decision-MakingIndividuals are not passive participants in...
371
01:37Social Loafing
39.8K
Another way in which a group presence can affect performance is social loafing—the exertion of less effort by a person working together with a group. Social loafing occurs when our individual performance cannot be evaluated separately from the group. Thus, group performance declines on easy tasks (Karau & Williams, 1993). Essentially individual group members loaf and let other group members pick up the slack. Because each individual’s efforts cannot be evaluated,...
39.8K
01:21Impact of Social Context on Individuals
366
Social psychology examines how the real or imagined presence of others influences individuals' thoughts, feelings, and behaviors. A key concept in this field is the role of social context in shaping behavior. The same individual may act differently depending on the social setting, due to the varying expectations and norms associated with each environment. This context-dependent behavior illustrates the influence of social roles, which prescribe appropriate conduct in specific situations.Social...
366