acta ethologica

, Volume 10, Issue 2, pp 81–88

Sex recognition in surface- and cave-dwelling Atlantic molly females (Poecilia mexicana, Poeciliidae, Teleostei): influence of visual and non-visual cues

Original Paper

Abstract

Cave fishes need to rely on non-visual senses, such as the sense of smell or the lateral line to communicate in darkness. In the present study, we investigated sex identification by females of a cave-dwelling livebearing fish, Poecilia mexicana (cave molly), as well as its surface-dwelling relatives. Unlike many other cave fishes, cave mollies still possess functional eyes. Three different modes of presentation of the stimulus fish (a male and an equally sized female) were used: (i) the stimulus fish were presented behind wire-mesh in light, allowing the focal female to perceive multiple cues, (ii) the experiment was carried out under infrared conditions, such that only non-visual cues could be perceived and (iii) the stimulus fish were presented in light behind transparent Plexiglas, allowing for the use of visual cues only. Females of all populations examined preferred to associate with the stimulus female in at least one of the treatments, but only when visible light was provided, suggesting that far-range sex recognition is limited or even absent in the cave molly under naturally dark conditions.

Keywords

Cave fish Lateral line Poeciliidae Sexual harassment Visual communication 

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Copyright information

© Springer-Verlag and ISPA 2007

Authors and Affiliations

  1. 1.Unit of Evolutionary Biology and Systematic Zoology, Institute of Biochemistry and BiologyUniversität PotsdamPotsdamGermany
  2. 2.Zoological InstituteUniversity of ZürichZürichSwitzerland
  3. 3.Department of ZoologyUniversity of OklahomaNormanUSA

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