Lipophilic compounds in femoral secretions of males and females of the El Hierro giant lizard Gallotia simonyi (Lacertidae) |
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| Institution: | 1. Departamento de Ecología Evolutiva, Museo Nacional de Ciencias Naturales, CSIC, José Gutiérrez Abascal 2, 28006 Madrid, Spain;2. CRARC, Catalonian Reptile and Amphibian Recovery Center, 08783 Masquefa, Barcelona, Spain;3. Cabildo Insular de El Hierro, Centro de Reproducción e Investigación del lagarto gigante de El Hierro, El Hierro, Canary Islands, Spain;1. Department of Agriculture Sciences, Xichang College, Xichang 615013, Sichuan Province, PR China;2. Flower Engineering Technology Research Center, Southwestern University, Chongqing 400715, PR China;1. Institute of Biology of Inland Waters, Russian Academy of Sciences, 152742 Borok, Yaroslavl Province, Russia;2. Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, Leninsky Prospect, 33, 119071 Moscow, Russia;1. School of Life Sciences, Sichuan Agricultural University, Yaan, Sichuan 625014, China;2. Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China;3. Alpine Crop Research Station, Xichang Institute of Agricultural Science, Liangshan Yi People Autonomous Prefecture, Xichang, Sichuan 616150, China;4. School of Resources and Environment, Sichuan Agricultural University, Chengdu, Sichuan 611130, China;5. Department of Food Science, Sichuan Tourism University, Chengdu, Sichuan 610100, China;1. Department of Chemistry, Villanova University, Villanova, PA 19085, USA;2. Department of Food Science, Cornell University, Ithaca, NY 14853, USA;3. Department of Biodiversity Earth and Environmental Sciences, Drexel University, Philadelphia, PA 19104, USA;4. Department of Botany, Academy of Natural Sciences of Drexel University, 1900 Benjamin Franklin Parkway, Philadelphia, PA 19103, USA |
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| Abstract: | Many lizards use femoral gland secretions in reliable intraspecific communication. Based on mass spectra, obtained by GC–MS, we found 57 lipophilic compounds in femoral secretions of males and females of El Hierro giant lizards, Gallotia simonyi (fam. Lacertidae). Compounds included steroids (mainly cholesterol) and fatty acids ranging between n-C16 and n-C22 (mainly hexadecanoic and octadecanoic acids), followed by aldehydes, alcohols, ketones, squalene and waxy esters. There were important intersexual differences in the presence, abundance and number of compounds (more numerous in males). Males had higher proportions of the most odoriferous compounds (fatty acids and aldehydes), while females had higher proportions of more stable compounds (steroids, waxy alcohols, waxy esters and terpenoids). This suggests sexual differences in function of femoral secretions. In addition, some compounds could reflect the physiological state, allowing monitoring health of lizards from secretions samples, which is especially important given the critical conservation status of this lizard. |
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| Keywords: | Lizards Femoral secretions Intersexual variations Canary Islands |
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