Document Detail

Chemical composition of precloacal secretions of two Liolaemus fabiani populations: are they different?
MedLine Citation:
PMID:  12757324     Owner:  NLM     Status:  MEDLINE    
The chemical composition of secretions of precloacal pores from two populations of the lizard Liolaemus fabiani (Puilar and Punta-Brava) were compared. This is an endemic species from the Atacama Salt Flat (26 degrees 46'S 68 degrees 14'W; 2400 m) in northern Chile, restricted to the internal lakes of the salt flat. Interpopulational differences in the chemical composition of the secretions were expected considering that populations have genetic differences and are subject to different thermal conditions. By using GC-MS, a total of 44 compounds were found belonging to three categories: n-alkanes, long-chain carboxylic acids, and steroids. Six compounds were found in all the individuals studied: tetradecanoic, pentadecanoic, hexadecanoic, hexadecenoic, octadecanoic, and octadecenoic acids. The secretions of both populations had similar types and proportions of the different compounds, except for cholesterol and hexanoic acid, which were more abundant in the Puilar population. These differences can be ascribed to the different environmental conditions to which populations are subjected. The adaptive meaning of these differences is discussed.
Claudio M Escobar; Carlos A Escobar; Antonieta Labra; Hermann M Niemeyer
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of chemical ecology     Volume:  29     ISSN:  0098-0331     ISO Abbreviation:  J. Chem. Ecol.     Publication Date:  2003 Mar 
Date Detail:
Created Date:  2003-05-21     Completed Date:  2003-10-07     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7505563     Medline TA:  J Chem Ecol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  629-38     Citation Subset:  IM    
Departamento de Ciencias Ecológicas, Facultad de Ciencias, Universidad de Chile, Casilla 653, Santiago, Chile.
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MeSH Terms
Adaptation, Physiological
Cloaca / physiology*
Exocrine Glands / chemistry,  physiology*
Gas Chromatography-Mass Spectrometry
Lizards / classification,  physiology*

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