SciELO - Scientific Electronic Library Online

 
vol.75 issue1Quantitative natural history of a host-parasite relationship: the Tristerix-cactus system in semiarid ChileA time-energy analysis of daytime surface activity in degus, Octodon degus author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

Related links

Share


Revista chilena de historia natural

Print version ISSN 0716-078X

Abstract

LABRA, Antonieta; ESCOBAR, Carlos A.; AGUILAR, Paz M.  and  NIEMEYER, Hermann M.. Sources of pheromones in the lizard Liolaemus tenuis. Rev. chil. hist. nat. [online]. 2002, vol.75, n.1, pp.141-147. ISSN 0716-078X.  http://dx.doi.org/10.4067/S0716-078X2002000100013.

Experimental tests were conducted with the lizard Liolaemus tenuis (Tropiduridae), to determine the potential sources of pheromones used in its chemical communication, centered in the phenomenon of self-recognition. During the post-reproductive season, feces of both sexes and secretions of precloacal pores (present only in males) were tested. Stimuli were presented to lizards spread on rocks, and the number of tongue-flicks (TF) to the rocks was used as a bioassay to determine pheromone recognition. Feces contained pheromones involved in self-recognition, since lizards showed less TF confronted to rocks with suspensions of their own feces than with suspensions of feces of conspecifics or with water (control). In order to assess the chemical nature of self-recognition pheromones, feces were submitted to a sequential extraction with three solvents of increasing polarity, thereby obtaining three feces fractions. There were no differences in TF towards rocks with different fractions with own feces. Additionally, lizards showed similar TF to rocks with fractions of own and conspecific feces, suggesting that the separation procedure broke up a complex stimulus into parts that were not active individually as pheromones. Finally, males did not discriminate between precloacal secretions from themselves and from another male. It is possible that these secretions convey information relevant to or detectable by females only

Keywords : self-recognition; Liolaemus; precloacal secretions; lizards; chemical discrimination; semiochemicals.

        · abstract in Spanish     · text in English     · English ( pdf )

 

Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License