Skip to Main content Skip to Navigation
Theses

Electric signals and social behavior of the weakly electric fish Marcusenius macrolepidotus (Mormyridae, Teleostei)

Abstract : This thesis concerns Marcusenius macrolepidotus (Mormyridae, Teleostei), a freshwater tropical fish producing weak electrical discharges. It describes its social locomotor and electrical behavior under laboratory conditions. Histological imaging reveals the typical generator and receptor organs of Mormyrid fish. The waveform of the electrical organ pulse discharges and the sequence of pulse intervals are digitized. Group movements are observed visually and then quantified in six groups, each composed of six individuals. In addition, the electrical activity of the group as a whole and that of the individual moving freely within the group are simultaneously monitored and recorded by a new setup. The sequence of pulse intervals shows individual stereotypies. The frequency and regularity of the rhythm increases as locomotor activity increases. The overall electrical activity of the group as a whole differs from that of a simple mixture of independent individuals. It is marked by stopping responses of the whole group reacting to the bursts of one individual, and by echo responses between neighboring individuals. Signal analysis thus highlights how a system as such can emerge from the communication animals signals that humans cannot perceive.
Complete list of metadata

https://hal.archives-ouvertes.fr/tel-03298706
Contributor : Christian Graff <>
Submitted on : Friday, July 23, 2021 - 6:15:28 PM
Last modification on : Sunday, July 25, 2021 - 3:26:06 AM

File

Thèse Christian Graff Comport...
Files produced by the author(s)

Identifiers

  • HAL Id : tel-03298706, version 1

Collections

Citation

Christian Graff. Electric signals and social behavior of the weakly electric fish Marcusenius macrolepidotus (Mormyridae, Teleostei). Neurosciences. Université Paris-Sud, 1986. Français. ⟨tel-03298706⟩

Share

Metrics

Record views

119

Files downloads

33