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Previous issue date: 2017-04-17 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Dentre as fam?lias de lagartos que habitam o semi?rido brasileiro, destaca-se Phyllodactylidae, e nesta, em especial o g?nero Phyllopezus, com as esp?cies P. pollicaris e P. periosus. A primeira possui distribui??o ampla na Caatinga e em outras forma??es abertas brasileiras, enquanto que P. periosus ? end?mica e com distribui??o restrita a algumas ?reas de Caatinga. Diante destes fatos, este estudo teve como objetivos registrar e analisar a ecologia t?rmica, dieta e modo de forrageamento de P. periosus, na tentativa de identificar fatores que possam influenciar a aparente distribui??o relictual desta esp?cie na Caatinga. Foram realizadas duas excurs?es nos meses de julho e outubro de 2015, com dura??o de dez dias cada ? Esta??o Ecol?gica do Serid? (ESEC Serid?), Unidade de Conserva??o da Caatinga no Estado do Rio Grande do Norte. Foram coletados 45 esp?cimes de P. periosus para os quais foram mensuradas a temperatura corporal do lagarto e as temperaturas ambientais (substrato e ar); todos os esp?cimes foram soltos em seguida. Para an?lise da dieta e comportamento alimentar foi utilizada a t?cnica de regurgita??o for?ada do alimento, al?m de grava??es das descri??es observadas sobre a atividade de forrageamento dos lagartos. Phyllopezus periosus utilizou como h?bitat, principalmente, os afloramentos rochosos com fendas, apresentou h?bito noturno com tend?ncia bimodal, e picos de atividades das 18:00 ?s 20:59 h e de 01:00 at? as 04:59 h. N?o houve diferen?a significativa na temperatura corporal entre machos e f?meas, por?m os juvenis apresentaram temperatura do corpo mais elevada que os adultos. A temperatura m?dia corporal de 28,5 ? 2,1?C foi influenciada pelas temperaturas das vari?veis analisadas, por?m apresentou maior rela??o com a temperatura do substrato, demonstrando que esta esp?cie ? tigmot?rmica. Quanto ? dieta, nos 31 est?magos com conte?do foram identificadas 107 presas pertencentes a 19 categorias de itens alimentares. Houve diferen?a na composi??o da dieta entre esp?cimes adultos e juvenis, mas n?o entre os sexos. Os indiv?duos observados passaram em m?dia 1,72 ? 1,94% do tempo em movimento (PTM) e apresentaram cerca de 0,37 ? 0,32 movimento por minuto (MPM), indicando modo de forrageamento do tipo senta-e-espera ou ?de espreita?. A predomin?ncia de cerca de 91% dos lagartos no uso do habitat ?grandes afloramentos rochosos com fendas profundas? pode constituir um dos fatores que contribuem para a distribui??o relictual de P. periosus. / Among the families of lizards that inhabit the Brazilian semiarid, Phyllodactylidae stands out, and in this, especially the genus Phyllopezus, with the species P. pollicaris and P. periosus. The first one has a wide distribution in the Caatinga and in other open Brazilian formations, while P. periosus is endemic and with restricted distribution to some Caatinga areas. Given these facts, this study aimed to record and analyze the thermal ecology, diet and mode of foraging behavior of P. periosus, in an attempt to identify factors that may influence the apparent relictual distribution of this species in the Caatinga. Two excursions were carried out in the months of July and October de 2015, with a duration of ten days each, to the Serid? Ecological Station (ESEC Serid?), Caatinga Conservation Unit in the State of Rio Grande do Norte. Forty-five specimens of P. periosus were collected for which the body temperature of the lizard and the environmental temperatures (substrate and air) were measured; all specimens were then released. For each specimen of P. periosus collected were measured the body temperature of the lizard and the environmental temperatures (substrate and air). For the analysis of the diet and feeding behavior was used the technique of forced regurgitation of the food, as well as recordings of the descriptions observed on the foraging activity of the lizards. Phyllopezus periosus used as habitat rocky outcrops with crevices, presented a nocturnal habit with a bimodal tendency, with peaks from 18:00 to 20:59 h and from 01:00 to 04:59 h. There was no significant difference in body temperature between males and females, but juveniles had higher body temperature than adults. The mean body temperature of 28.5 ? 2.1 ?C was influenced by the temperatures of the analyzed variables, but showed a higher relation with the temperature of the substrate, demonstrating that this species is tigmothermic. In the diet, of the 31 stomachs with content, 107 prey belonging to 19 categories of food items were identified. There was a difference in diet composition between adult and juvenile specimens, but not between the sexes. The observed individuals spent on average 1.72 ? 1.94% of the time in movement (PTM) and presented about 0.37 ? 0.32 movements per minute (MPM), indicating the mode of foraging of the type sit-and-wait or ?lurking?. The predominance of about 91% of lizards in habitat use "large rocky outcrops with deep cracks" may be one of the contributing factors for the relictual distribution of P. periosus.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/23570 |
| Date | 17 April 2017 |
| Creators | Palmeira, Cristiane Nikely Silva |
| Contributors | 10843175400, http://lattes.cnpq.br/6388455734228621, Ribeiro, Leonardo Barros, 04586009624, http://lattes.cnpq.br/3811678559990456, Kolodiuk, Miguel Fernandes, 01229225498, http://lattes.cnpq.br/1507247604123178, Freire, Eliza Maria Xavier |
| Publisher | PROGRAMA DE P?S-GRADUA??O EM CI?NCIAS BIOL?GICAS, UFRN, Brasil |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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