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| Author(s): |
Carolina Nisa Ramiro
Total Authors: 1
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| Document type: | Doctoral Thesis |
| Press: | São Paulo. |
| Institution: | Universidade de São Paulo (USP). Instituto de Biociências (IBIOC/SB) |
| Defense date: | 2019-10-25 |
| Examining board members: |
Miguel Trefaut Urbano Rodrigues;
Felipe Franco Curcio;
Taran Grant;
Selma Maria de Almeida Santos
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| Advisor: | Miguel Trefaut Urbano Rodrigues; Pedro Ismael da Silva Junior |
| Abstract | |
Chemical interactions play an essential role in different social interactions of lizards and are mediated by chemical compounds present, mainly, in their femoral and preanal glands. The number of studies characterizing the chemical composition of femoral and preanal gland secretions, as well as trying to identify their functional role in social contexts, has increased in recent decades. Although the literature on the chemical communication in lizards is extensive, data for neotropical species are rare and for Brazilian species, there is only information for males of Salvator merianae. The main goal of this work is to expand the knowledge on the chemical composition of femoral secretion of neotropical lizards. We chemically characterized the femoral and preanal secretion of 11 species of Teiidae and six of Gymnophthalmidae. Were identified a total of 205 compounds, 28 exclusively in Gymnophthalmidae and 106 exclusively in Teiidae. We demonstrated the influence of the environmental condition on the femoral gland secretion of males of Ameiva ameiva from Amazonia and Caatinga, differences between chemical composition of femoral gland secretion of free-living and captive S. merianae, the role of the chemical composition in understanding a potential cryptic complex of Ameivula and differences in males of two species of Kentropyx that may be associated with substrate use. We hypothesized that reproductive status may have a direct influence on the chemical composition of femoral gland secretions of males and females, revealing a problem in the study of the chemical composition of Teiidae species that lack information about their reproductive cycle and/or show prolonged/continuous reproduction. Regarding what was known for S. merianae, we validated the large amount of fatty acids as a characteristic of the species of Teiidae and, for the first time, identified cholesterol for a Teiidae species. This work validated the Teiidae species as an excellent model for the study of the chemical interactions in neotropical lizards and the potential informative of the chemical composition of femoral gland secretions to better understand the ecology and evolutionary events of Teiidae lineages (AU) | |
| FAPESP's process: | 15/12841-5 - Chemical characterization of epidermal, cloacal and preanal and femoral glands secretions of the Brazilian lizards species of Teiidae Family (Squamata) |
| Grantee: | Carolina Nisa Ramiro |
| Support Opportunities: | Scholarships in Brazil - Doctorate |