Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-04-17T22:58:07Z No. of bitstreams: 1 MiguelFernandesKolodiuk_TESE.pdf: 13494777 bytes, checksum: 2da489b36148192cd5cdbdaf6a82c58d (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-04-20T18:25:19Z (GMT) No. of bitstreams: 1 MiguelFernandesKolodiuk_TESE.pdf: 13494777 bytes, checksum: 2da489b36148192cd5cdbdaf6a82c58d (MD5) / Made available in DSpace on 2017-04-20T18:25:19Z (GMT). No. of bitstreams: 1 MiguelFernandesKolodiuk_TESE.pdf: 13494777 bytes, checksum: 2da489b36148192cd5cdbdaf6a82c58d (MD5) Previous issue date: 2016-10-31 / A Caatinga ocupa cerca de 800.000 km2, caracterizada por escassez de precipita??o, altas temperaturas, variabilidade na sazonalidade clim?tica com forte intercala??o de anos de secas e de inunda??es. Quanto a aspectos fitofision?micos e morfoclim?ticos, apresenta pelo menos duas fisionomias conhecidas na literatura, Caatinga stricto sensu e Caatinga lato sensu. A primeira corresponde ?s ?reas situadas na Depress?o Sertaneja Setentrional, com vegeta??o arbustiva e temperaturas mais elevadas; j? a Caatinga lato sensu compreende ?reas de vegeta??o arb?rea e arb?reo-arbustivas, sobre topos das chapadas e serras com mais de 500 m de altitude, e temperaturas mais amenas. Estudos cl?ssicos destacam a exist?ncia de padr?o de distribui??o relictual para algumas esp?cies de lagartos, que parecem ser exclusivas de ?reas de Caatinga lato sensu. Nesse contexto, este trabalho teve como objetivo geral analisar a composi??o e a estrutura da comunidade de r?pteis Squamata e estudar os comportamentos de termorregula??o e de forrageamento das esp?cies de lagartos tropidur?deos da Caatinga lato sensu, da Serra de Santana, Lagoa Nova, RN. Foram realizadas quatros excurs?es de 20 dias cada ? ?rea de estudo, sendo duas no ano de 2014 (esta??es chuvosa e seca), e duas no ano de 2015 nos mesmos meses (mar?o e setembro) da coleta do ano anterior. Em 2014, foram registrados e/ou coletados esp?cimes de Squamata por procura ativa e armadilhas de queda, quando foi registrado para cada esp?cime ativo o h?bitat, microh?bitat e hor?rio de atividade. Em 2015 foram realizadas observa??es comportamentais para os lagartos tropidur?deos atrav?s de sess?es focais para registros dos comportamentos de termorregula??o e de forrageamento. Foram coletadas 34 esp?cies de Squamata e a curva de rarefa??o n?o atingiu ass?ntota, indicando a possibilidade de existirem mais esp?cies na ?rea. Destacam-se as presen?as de esp?cies de distribui??o relictual em ?reas de Caatinga, quais sejam, Acratosaura mentalis, Enyalius bibronii e Anotosaura vanzolinia. Comparando a composi??o das esp?cies de lagartos com as de outras ?reas de Caatinga, constatou-se a forma??o de tr?s grupos: esp?cies de ?rea florestada (brejos de altitude); de Caatinga lato sensu e de Caatinga stricto sensu. A an?lise do modelo nulo demonstrou que esta comunidade de lagartos est? estruturada quanto ao uso do espa?o, indicando influ?ncia significativa de fatores ecol?gicos contempor?neos sobre essa taxocenose. O uso n?o aleat?rio do componente espacial indicou presen?a de intera??es competitivas que influenciam a sele??o dos habitats e microhabitats. Os resultados do comportamento termorregulat?rio mostraram que nesta Caatinga lato sensu as duas esp?cies de tropidur?deos n?o diferem em comportamento termorregulat?rio, embora T. semitaeniatus se exponha mais ao sol do que T. hispidus durante a esta??o chuvosa. Quanto ao forrageamento, as duas esp?cies se comportaram de maneira similar na esta??o seca, mudando de estrat?gia durante a esta??o chuvosa e, comparando com a Caatinga stricto sensu, as duas esp?cies forrageiam de forma mais ativa durante a esta??o chuvosa na Caatinga lato sensu. Confirmam-se, portanto, as presen?as de esp?cies relictuais e de estrat?gias comportamentais diferentes para os lagartos tropidur?deos de Caatinga lato sensu. / The Caatinga occupies an area of approximately 800,000 km2, and is characterized by rainfall scarcity, high temperatures, and variability in climatic seasonality, with strong intercalation of dry and floody years. Among these phytophysiognomic and morphoclimatic aspects, it is worth noting that this area has at least two landscapes known in the literature: Caatinga stricto sensu and Caatinga lato sensu. The Caatinga stricto sensu refers to areas located in the Northern Country Depression (Depress?o Sertaneja Setentrional), with shrubby vegetation and higher temperatures. On the other hand, the Caatinga lato sensu comprises areas of arboreal-bushy vegetation located on the tops of plateaus and mountains with more than 500 m altitude, thus presenting milder temperatures. Classical studies highlight the existence of a pattern of relictual distribution for some lizard species of the Caatingas, which seem to be unique from areas of Caatinga lato sensu. Four 20-day trips were carried to the study area, two in 2014 and two in 2015, in March (rainy season) and September (dry season). In 2014, Squamata specimens were registered and/ or collected through active search and pitfall traps, and for each active specimen, habitat, microhabitat and activity hour were recorded. In 2015, behavioral observations of tropidurid lizards were carried out through focal sessions to analyze the themoregulatory and foraging behaviors and compare them with populations of a Caatinga stricto sensu area. A total of 34 species of Squamata was recorded, and the rarefaction curve did not reach an asymptote, indicating the possibility of more species in the area. Noteworthy is the presence of species with relictual distributions, such as Acratosaura mentalis, Enyalius bibronii and Anotosaura vanzolinia. Comparing the composition of the lizard species with other Caatinga sites, we observed the formation of three groups: communities from forested highlands; from areas of Caatinga lato sensu, and from areas of Caatinga stricto sensu. A null model analysis showed that the studied lizard community is structured on the spatial niche axis, indicating a significant influence of contemporary ecological factors on this assemblage. The non-random use of space by the lizard species indicates the presence of competitive interactions that influence the selection of habitats and microhabitats used. In general, the two Tropidurus species did not differ in their thermoregulatory behavior, although T. semitaeniatus exposed yourself to the sun more than T. hispidus during the rainy season. Regarding the foraging behavior, T. hispidus and T. semitaeniatus behaved similarly in the dry season, changing strategy during the rainy season. The two species foraged more actively during the rainy season in the studied site when compared with an area of Caatinga stricto sensu. In conclusion, the data obtained in this study confirm the presence of relictual species and the presence of different behavioral strategies for tropidurid lizards in area of Caatinga lato sensu.