Effect of conductivity changes on the stability of electric signal waveforms in dwarf stonebashers (Mormyridae; Pollimyrus castelnaui, P. marianne).

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urn:nbn:de:bvb:355-epub-43224 Copy

Baier, Bernd

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Date of publication of this fulltext: 05 Aug 2009 13:46

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Details

Item type:	Article
Journal or Publication Title:	Journal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology
Publisher:	Springer
Volume:	194
Number of Issue or Book Chapter:	10
Page Range:	pp. 915-919
Date:	October 2008
Institutions:	Biology, Preclinical Medicine > Institut für Zoologie
Identification Number:	Value Type 10.1007/s00359-008-0360-0 DOI 18726600 PubMed ID
Keywords:	electric organ discharge; water conductivity; Q10 value; species recognition; weakly electric fish
Dewey Decimal Classification:	500 Science > 570 Life sciences 500 Science > 590 Zoological sciences
Status:	Published
Refereed:	Yes, this version has been refereed
Created at the University of Regensburg:	Yes
Item ID:	4322

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Abstract

The dwarf stonebasher sibling species Pollimyrus castelnaui and P. marianne use differences in the electric organ discharges (EODs) for species recognition. As EOD waveforms are affected by water conductivity changes, the reliability of species recognition might be impeded due to natural variability in the environment. EODs of P. castelnaui (N = 8) and P. marianne (N = 8) under high (250 µS/cm) ...

Abstract

The dwarf stonebasher sibling species Pollimyrus castelnaui and P. marianne use differences in the electric organ discharges (EODs) for species recognition. As EOD waveforms are affected by water conductivity changes, the reliability of species recognition might be impeded due to natural variability in the environment. EODs of P. castelnaui (N = 8) and P. marianne (N = 8) under high (250 µS/cm) and low (25 µS/cm) conductivity were recorded and compared. Local peaks of the EODs of both species were significantly and predictably modified due to the conductivity change but species-specific differences were always recognizable. The duration of the EODs was not influenced by the conductivity change. Temperature alterations modified the duration in a linear relationship, allowing the determination of Q10 values (1.6 for P. castelnaui's and 1.7 for P. marianne's EODs). As the species-specific differences are not masked by conductivity effects, EOD discrimination seems to be a reliable species recognition mechanism under natural circumstances.

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Metadata last modified: 04 Jun 2018 11:58

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