TY - JOUR
T1 - Chemical composition of precloacal secretions of two Liolaemus fabiani populations
T2 - Are they different?
AU - Escobar, Claudio M.
AU - Escobar, Carlos A.
AU - Labra, Antonieta
AU - Niemeyer, Hermann M.
N1 - Funding Information:
Acknowledgments—The authors thank H. Thieleman for field assistance; the Centro de Estudios Ambientales (CEA), F.F. Novoa, and La Escondida copper mine, for logistic support; and A. Veloso for sharing information on the genetic studies in L. fabiani. Financial support came from International Foundation for Science grants 2933-1 (A.L.) and 2933-1 (C.A.E.), FONDECYT 3990021 (A.L.), and the Presidencial Chair in Sciences awarded to H.M.N. This work is part of the research carried out at the Center for Advanced Studies in Ecology and Research in Biodiversity funded by the Millennium Science Initiative (P099-103F, ICM).
PY - 2003/3/1
Y1 - 2003/3/1
N2 - The chemical composition of secretions of precloacal pores from two populations of the lizard Liolaemusfabiani (Puilar and Punta-Brava) were compared. This is an endemic species from the Atacama Salt Flat (26°46'S 68° 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.
AB - The chemical composition of secretions of precloacal pores from two populations of the lizard Liolaemusfabiani (Puilar and Punta-Brava) were compared. This is an endemic species from the Atacama Salt Flat (26°46'S 68° 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.
KW - Liolaemus fabiani
KW - Lizard
KW - Precloacal secretion
UR - http://www.scopus.com/inward/record.url?scp=0242500313&partnerID=8YFLogxK
U2 - 10.1023/A:1022858919037
DO - 10.1023/A:1022858919037
M3 - Article
C2 - 12757324
AN - SCOPUS:0242500313
VL - 29
SP - 629
EP - 638
JO - Journal of Chemical Ecology
JF - Journal of Chemical Ecology
SN - 0098-0331
IS - 3
ER -