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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Estrutura da Comunidade de Lagartos de um remanescente de mata atl?ntica do Estado do Rio Grande Do Norte, Brasil.

Sousa, Pablo Augusto Gurgel de 18 March 2010 (has links)
Made available in DSpace on 2014-12-17T15:36:57Z (GMT). No. of bitstreams: 1 PabloAGS.pdf: 2059832 bytes, checksum: 8f5ad8bf243bff28547c0104bc0b6e7c (MD5) Previous issue date: 2010-03-18 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico / As part of a broader project, Diversity and Distribution Patterns of Floristic and Faunistic composition of remnants of Potiguar s Atlantic Forest, as subsidies to conservation , that subsidizes a group of institutional research, This study aimed to evaluate the structure of the assemblage of lizards a remnant of the of the northern Atlantic Forest, identifying ecological factor (s) that contribute to the coexistence of sympatric species. Additionally, we studied the thermal ecology and thermoregulatory behavior of umbrophily and heliophily species live the Parque Estadual Mata da Pipa (PEMP), a remnant of Atlantic forest located in the Tibau do Sul municipality of, Rio Grande do Norte State, Brazil. It is one of the largest remnants of the Atlantic Forest and has an area of approximately 290 ha. The study was performed by four excursions to the field for 20 days each, when active search and pitfalls traps were used to record and colleted specimens in different habitats of the area. We recorded the presence of 19 species of lizards, of which seven are typical of forest areas, three are endemic Atlantic Forest, these two northern and one are new record for the Rio Grande do Norte. The use of resources, the results showed that phylogenetically related species do not always use a similar way the resources available; the feeding niche was the segregated component of the species that overlapped extensively in the use of space and vice versa. To examine the thermal ecology and thermoregulatory behavior of Kentropyx calcarata and Coleodactylus natalensis, we recorded the clocal temperature (Tc), oh the substrate (Ts) and of the air (Ta) to investigate what of these are the source of heat more important to the temperature s body of these lizards. Behavioral observations were conducted to analyze strategies to optimize the acquisition of heat. The air temperature explained most strongly to variation in body temperature of K. calcarata, while the temperature of the substrate to C. natalensis. As for the behavioral observations, they confirmed that K. calcarata is an active thermoregulatory; C. natalensis is a passive thermoregulatory. / Como parte de um Projeto mais amplo, Diversidade e Padr?es de Distribui??o da Composi??o Flor?stica e Faun?stica de remanescentes da Mata Atl?ntica potiguar, como subs?dios ? Conserva??o , que subsidia um grupo de pesquisa institucional, este estudo objetivou avaliar a estrutura da assembl?ia de lagartos de um remanescente de Mata Atl?ntica setentrional, identificando fator (es) ecol?gicos que contribuem para a coexist?ncia das esp?cies simp?tricas. Adcionalmente, foram estudados a ecologia termal e o comportamento de termorregula??o de esp?cies umbr?filas e heli?filas habitantes do Parque Estadual Mata da Pipa (PEMP), um remanescente de Mata Atl?ntica localizado no munic?pio de Tibau do Sul, Estado do Rio Grando do Norte, Brasil. ? um dos maiores remanescente de Mata Atl?ntica do Estado e possui uma ?rea de aproximadamente 290 ha. O trabalho foi efetuado por meio de quatro excurs?es ? campo, com dura??o de 20 dias cada, quando buscas ativas e armadilhas de queda foram utilizadas para registrar e coletar os esp?cimes nos diversos h?bitats da ?rea. Registraram-se 19 esp?cies de lagartos, das quais sete s?o de ?reas florestadas, tr?s end?micas de Mata Atl?ntica duas destas setentrionais e uma ? um novo registro para o Rio Grande do Norte. Quanto ? utiliza??o dos recursos, as esp?cies filogeneticamente pr?ximas nem sempre utilizaram de maneira semelhante os recursos dispon?veis; o nicho alimentar foi o componente segregativo das esp?cies que se sobrepuseram amplamente no uso do espa?o e vice-versa. Para analisar a ecologia t?rmica e o comportamento termoregulat?rio de Kentropyx calcarata e Coleodactylus natalensis registrou-se a temperatura cloacal (Tc), a do substrato (Ts) e a do ar (Ta) para averiguar qual (is) destas constitui a fonte de calor mais importante para a regula??o de temperatura corp?rea desses lagartos. Observa??es comportamentais foram efetuadas para analisar estrat?gias para otimizar a obten??o de calor. A temperatura do ar explicou mais fortemente a varia??o na temperatura corporal de K. calcarata, enquanto a temperatura do substrato a de C. natalensis. Quanto ?s observa??es comportamentais, foi confirmado para K. calcarata que este ? um termorregulador heli?filo ativo; C. natalensis ? umbr?filo ou termorregulador passivo.

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