Electrical and behavioral courtship displays in the mormyrid fish Brienomyrus brachyistius

Ryan Wong, Carl D. Hopkins

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

Mormyrid electric fish rely on the waveform of their electric organ discharges (EODs) for communicating species, sex, and social status, while they use the sequences of pulse intervals (SPIs) for communicating rapidly changing behavioral states and motivation. Little is known of electric signaling during courtship behavior because of two major difficulties: (1) the fish are not easily bred in captivity and (2) there is no reliable means of separating electric signals from several individuals in natural communication settings. Through simulating artificial rain conditions, we have successfully induced courtship and succeeded in breeding a mormyrid electric fish (Brienomyrus brachyistius) in the laboratory. We have also developed a system of video recording and editing combined with cross correlation analysis to precisely record and view behavior and separate EODs from two individuals in non-breeding and breeding contexts. Knowing the electrical and motor patterns during courtship allows for further exploration of topics such as mate choice and neural basis of pattern generation in these fish. Here we describe nine common motor displays and 11 SPIs. Analysis of frequency of occurrences suggests that some SPI patterns are sex and season specific. We also observed electrical duetting called 'rasp matching' during courtship signaling among pairs; males and females exchange 'rasps' and 'bursts', respectively, in alternation. Our study employs new techniques to separate and document SPIs in the context of courtship. We show that some SPIs correlate with specific behavioral acts around the time of spawning.

Original languageEnglish (US)
Pages (from-to)2244-2252
Number of pages9
JournalJournal of Experimental Biology
Volume210
Issue number13
DOIs
StatePublished - Jul 1 2007

Fingerprint

Electric Fish
Courtship
courtship
Fishes
Electric Organ
fish
Breeding
breeding
Video Recording
social status
Rain
gender
captivity
mate choice
mating behavior
animal communication
Motivation
spawning
Communication
Brienomyrus

Keywords

  • Brienomyrus
  • Courtship
  • Electric organ discharge
  • Electrocommunication
  • Mormyridae
  • Reproduction

ASJC Scopus subject areas

  • Medicine(all)
  • Physiology
  • Ecology, Evolution, Behavior and Systematics
  • Aquatic Science
  • Molecular Biology
  • Animal Science and Zoology
  • Insect Science

Cite this

Electrical and behavioral courtship displays in the mormyrid fish Brienomyrus brachyistius. / Wong, Ryan; Hopkins, Carl D.

In: Journal of Experimental Biology, Vol. 210, No. 13, 01.07.2007, p. 2244-2252.

Research output: Contribution to journalArticle

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