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 Experiment Videos

Cooperative signalling between opponents in fish fights

Hurd1

  • 1Division of Ethology, Department of Zoology, University of Stockholm

Animal Behaviour
|December 17, 1997
PubMed
Summary

Nannacara anomala cichlids use color displays during fights not to signal fighting ability, but to share information between opponents. These signals facilitate assessment, revealing cooperative aspects within aggressive encounters.

Related Concept Videos

You might also read

Related Articles

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

Sort by
Same author

The Close Relation Existing between, and Probable Identity of, Scarlatina and Diphtheria.

The Independent practitioner·2023
Same author

Nonlinear waves in reaction-diffusion systems: the effect of transport memory

Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics·2000
Same author

Current-voltage relation for asymmetric ballistic superconducting junctions.

Physical review. B, Condensed matter·1996
Same author

Superconducting current in a ballistic double superconducting-normal-metal-superconducting structure.

Physical review. B, Condensed matter·1995
Same author

Andreev level spectrum and Josephson current in a superconducting ballistic point contact.

Physical review. B, Condensed matter·1994
Same author

Single-electron tunneling into randomly distributed double-electron states: Linear voltage and temperature dependences of the conductance of high-Tc tunnel junctions.

Physical review. B, Condensed matter·1992

Area of Science:

  • Ethology
  • Animal Behavior
  • Fish Biology

Background:

  • Nannacara anomala cichlids exhibit color displays during aggressive encounters.
  • The function of these displays, particularly in relation to fighting ability or motivation, remains unclear.
  • Winning in these fights is often predicted by weight asymmetries.

Purpose of the Study:

  • To investigate the function of medial line and vertical bar color displays in Nannacara anomala during fights.
  • To determine if these color displays signal fighting ability or motivation.
  • To explore the role of cooperative signaling in fish combat.

Main Methods:

  • Observational study of Nannacara anomala during staged fights.
  • Correlation analysis between specific color displays (Medial Line, Vertical Bar) and fighting behaviors (tail-beating, mouth-wrestling).
  • Assessment of whether color displays predict fight outcomes or relate to weight asymmetries.

Main Results:

  • Medial Line color displays were associated with and predicted tail-beating behavior.
  • Vertical Bar color displays were associated with mouth-wrestling behavior.
  • Color displays did not appear to signal fighting ability or motivation directly.

Conclusions:

  • Nannacara anomala color displays likely function to facilitate the transmission of assessment information between fighting individuals.
  • These displays represent a form of cooperative signaling, highlighting cooperative aspects within aggressive interactions.
  • The findings contribute to understanding the complex dynamics of animal combat and signaling.

Related Experiment Videos