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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

Estudos da comunidade de Squamata e de ecologia comportamental de Tropidurus Hispidus e T. Semitaeniatus (Squamata, Tropiduridae) em ?rea de caatinga lato sensu

Kolodiuk, Miguel Fernandes 31 October 2016 (has links)
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.
2

Herpetofauna associada ? brom?lia rup?cola, encholirium spectabile, no semi?rido brasileiro: revis?o da literatura, ecologia das esp?cies e comportamento de psychosaura agmosticha (squamata: mabuyidae)

Jorge, Jaqueiuto da Silva 20 April 2015 (has links)
Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-02-22T22:44:30Z No. of bitstreams: 1 JaqueiutoDaSilvaJorge_DISSERT.pdf: 2432483 bytes, checksum: 9b636e72f0c2648983e4b2baeed6a869 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-02-25T22:18:24Z (GMT) No. of bitstreams: 1 JaqueiutoDaSilvaJorge_DISSERT.pdf: 2432483 bytes, checksum: 9b636e72f0c2648983e4b2baeed6a869 (MD5) / Made available in DSpace on 2016-02-25T22:18:24Z (GMT). No. of bitstreams: 1 JaqueiutoDaSilvaJorge_DISSERT.pdf: 2432483 bytes, checksum: 9b636e72f0c2648983e4b2baeed6a869 (MD5) Previous issue date: 2015-04-20 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico - CNPq / As brom?lias constituem importante microhabitat para a herpetofauna, pois s?o bastante utilizadas como abrigo contra predadores, al?m de sua arquitetura foliar possibilitar manuten??o de umidade e temperatura relativamente constantes no seu interior, compondo um ambiente favor?vel para os anf?bios e r?pteis, especialmente em ?reas sob estresse h?drico. No entanto, os estudos que tratam dessa rela??o ainda s?o incipientes e mais concentrados sobre as brom?lias fitotelmatas acumuladoras de ?gua. No caso das brom?lias rup?colas n?o fitotelmatas do g?nero Encholirium, que se desenvolvem em afloramentos rochosos e abrigam esp?cies de regi?es semi?ridas como as Caatingas, as rela??es animais-plantas s?o praticamente desconhecidas. Nesse contexto, este estudo teve como objetivos estudar a fauna herpetol?gica habitante das brom?lias macambiras, Encholirium spectabile, analisando a ocupa??o e uso destas brom?lias pelos diferentes t?xons, e a ecologia comportamental do largarto Psychosaura agmosticha, buscando identificar os fatores associadas com esta rela??o estrita em ?rea de Caatinga. Uma ampla revis?o da literatura mundial acerca do tema lagartos em brom?lias subsidiou este estudo sob a perspectiva ecol?gica dessa associa??o. O trabalho de campo foi realizado na Fazenda Tanques, munic?pio de Santa Maria/RN, mesorregi?o do Agreste potiguar, com as observa??es e/ou coletas diurnas e noturnas efetuadas mensalmente, durante tr?s dias consecutivos, de Janeiro de 2011 a Agosto de 2012, totalizando 450 horas.homem de esfor?o amostral. Registraram-se dezesseis esp?cies, seis de lagartos (Fam?lias Mabuyidae, Tropiduridae, Gekkonidae e Phyllodactylidae), seis de serpentes (Fam?lias Boidae e Dipsadidae) e quatro de anf?bios da Fam?lia Hylidae. O efeito da borda da mata sobre a distribui??o das esp?cies ao longo do afloramento foi significativo, com a maioria das esp?cies encontradas nas bordas do afloramento. Constataram-se diferen?a significativa entre alguns pares de esp?cies com rela??o ao uso 2 das brom?lias, e sobreposi??o de nicho quase total no uso de microhabitat. 62.5% das esp?cies s?o de h?bito noturno e utilizaram essas plantas para abrigo, reprodu??o e alimenta??o. Quanto ?s rela??es entre o lagarto Psychosaura agmosticha e as brom?lias macambiras, foram registrados os comportamentos de termorregula??o e de forrageio nas esta??es seca e chuvosa. Os per?odos de atividade foram concentrados entre 07 e 10 h e entre 15 e 17 horas nas duas esta??es, demostrando um padr?o claramente bimodal. A esp?cie usou basicamente as folhas verdes e n?o houve diferen?as significativas entre machos e f?meas na utiliza??o das brom?lias. Associa??es positivas foram encontradas entre a temperatura do corpo e temperaturas das brom?lias e do ar. Esta esp?cie passou em m?dia 1.95 ? 3.8% do tempo em movimento (PTM) e se movimentou em m?dia 0.36 ? 2.1 segundos por minuto (MPM), com diferen?as significativas entre as esta??es chuvosa e seca para PTM, e tamb?m entre o tempo m?dio da parada e dura??o m?dia dos movimentos, sendo considerada forrageadora sedent?ria. Psychosaura agmosticha, na ?rea estudada, ? bromel?cola, utilizando as macambiras principalmente para termorregula??o e forrageio. Os resultados deste estudo destacam as brom?lias rup?colas Encholirium spectabile como elementos chaves para a manuten??o de anf?bios e r?pteis a ela associados, e uma clara associa??o vantajosa para a conserva??o dos grupos envolvidos. / Bromeliads are an important microhabitat for the herpetofauna, for being widely used as refuge from predators and their leaf architecture allows humidity maintenance and relatively constant temperature inside, setting a favorable environment for amphibians and reptiles, especially in areas under hydric stress. However, studies addressing this relationship are still incipient and more concentrated in fitotelmatas bromeliad. For non-fitotelmatas rupicolous bromeliads of the gender Encholirium, which develops into rocky outcrops and contains species of semi-arid regions such as the Caatinga, animal-plant relationships are almost unknown. In this context, this study aimed to know the herpetological fauna inhabitant of macambiras bromeliads, Encholirium spectabile, analyzing occupation and use of these bromeliads by different taxa, and the behavioral ecology of the lizard Psychosaura agmosticha, seeking to identify factors associated with this strict relationship in Caatinga. An extensive review of the world literature on the subject ?lizards in bromeliads? subsidized this study from the ecological perspective of this association. The field work was carried out at Fazenda Tanques, municipality of Santa Maria / RN, mesoregion of Agreste Potiguar. The observations and/or data collection in daytime and in the evening was conducted monthly during three consecutive days, from January 2011 to August 2012, totaling 450 hour.man of sampling effort. Sixteen species were registered: six lizards (Mabuyidae, Tropiduridae, Gekkonidae and Phyllodactylidae Families), six snakes (Boidae and Dipsadidae Families) and four of amphibians of Hylidae Family. The effect of the forest edge on the distribution of species along the outcrop was significant, with most species found in outcrop edges. Significant difference was found between some pairs of species concerning use of bromeliads, and almost total niche overlap in the use of microhabitat. 62.5% of the species are nocturnal and use these plants for sheltering, breeding and feeding. Regarding the relations between 4 the lizard Psychosaura agmosticha and macambiras bromeliads, behaviors of thermoregulation and foraging in the dry and wet seasons were recorded. Activity periods were concentrated between 7 and 10 am and between 3 and 5 pm in both seasons, showing a clear bimodal pattern. The species basically used the green leaves and there were no significant differences between males and females in the use of bromeliads. Positive associations were found between body temperature and temperatures of bromeliads and air. This species spent 1.95% ? 3.8 of the time moving (PTM) and moved on average 0:36 ? 2.1 seconds per minute (MPM), with significant differences between the wet and dry to PTM, and between the average time of stop and average duration of movements, being considered a sedentary forager. Psychosaura agmosticha, in the study area, is bromelicolous and uses macambiras primarily for thermoregulation and foraging. The results of this study elevate the rupicolous bromeliads Encholirium spectabile as key elements for the maintenance of amphibians and reptiles associated with it, and a clear advantageous association for the conservation of the groups involved.
3

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.
4

Ecologia comportamental de tropidurus Hispidus e Tropidurus Semitaeniatus (Squamata, Tropiduridae) em Simpatria, em ?rea de caatinga do nordeste do Brasil.

Ribeiro, Leonardo Barros 19 March 2010 (has links)
Made available in DSpace on 2014-12-17T15:36:35Z (GMT). No. of bitstreams: 1 LeonardoBR_TESE_Cap_II_III.pdf: 677404 bytes, checksum: 247b1251f8d1d16cb41bf4f8ec2f3c18 (MD5) Previous issue date: 2010-03-19 / Universidade Federal do Rio Grande do Norte / This study evaluated the spatial, time and alimentary niches of Tropidurus hispidus and Tropidurus semitaeniatus in sympatry in a caatinga of Rio Grande do Norte, Brazil, as well as their foraging and termoregulatory behaviors, the activity body temperature and their reproductive and fat body cycles. Monthly excursions, from October 2006 to May 2008, were conducted at the Ecological Station of the Serid? (ESEC Serid?), Serra Negra do Norte municipality, using specific methodology for investigation of the aforementioned objectives. The two species presented similarities in space niche use, mainly in rocky habitat, however they differed in vertical microhabitat use with T. hispidus using a larger vertical microhabitat range. In the dry season the time of activity of both species was bimodal. In the wet season T. semitaeniatus showed a unimodal activity period, while T. hispidus maintained an bimodal activity period. In terms of importance in the diet, to both species, Hymenoptera/Formicidae and Isoptera predominated during the dry season. In the wet season, although Hymenoptera/Formicidae had larger importance among the prey items, lizards opportunistically predated on Lepidoptera larvae, Coleoptera larvae/adults and Orthoptera nymphs/adults. The foraging intensity revealed differences between the species, mainly in the wet season, when T. semitaeniatus was more active than T. hispidus. The mean activity body temperature of T. semitaeniatus was significantly higher than that of T. hispidus. The thermoregulatory behavior showed that during the dry season T. hispidus and T. semitaeniatus spent more time in shade or under filtered sun. In the wet season, T. hispidus did not show differences in the amount of time spent among the light exposure locations, however T. semitaeniatus spent most of their time exposed to direct sun or filtered sun. The reproductive cicle of T. hispidus and T. semitaeniatus occurred from the middle of the dry season to the beginning of the wet season. In both species, female reproductive activity was influenced by precipitation, whereas males exhibited spermatozoa in their testes throughout the year, and their reproductive activity was not related with any of the climatic variables analysed. In the two species, the fat storage varied inversely with reproductive activity, and there was no difference in fat body mass between females and males. We concluded that the segregation between T. hispidus and T. semitaeniatus in this caatinga area occurs in vertical space use, in the largest vagility of T. hispidus in microhabitat use and larger range size of their alimentary xviii items. Additionally, significant seasonal differences in relation to the activity period, body temperature, and foraging and termoregulatory behaviors between these two Tropidurus species facilitate their coexistence. / Este estudo avaliou o uso dos recursos espacial, temporal e alimentar por Tropidurus hispidus e Tropidurus semitaeniatus em simpatria em uma caatinga do Rio Grande do Norte, Brasil, bem como seus comportamentos de forrageamento e termorregulat?rio, suas temperaturas corp?reas em atividade e seus ciclos reprodutivos e de gordura corp?rea. Excurs?es mensais, de outubro de 2006 a maio de 2008, foram realizadas ? Esta??o Ecol?gica do Serid? (ESEC Serid?), munic?pio de Serra Negra do Norte, com utiliza??o de metodologia espec?fica para a investiga??o dos objetivos acima mencionados. As duas esp?cies apresentaram similaridades no uso do nicho espacial, especialmente no h?bitat rochoso; contudo, elas diferiram no uso vertical do micro-h?bitat com T. hispidus usando uma faixa vertical maior do micro-h?bitat. Na esta??o seca o per?odo de atividade de ambas as esp?cies foi bimodal. Na esta??o chuvosa, a atividade de T. semitaeniatus mostrou um per?odo unimodal, enquanto T. hispidus manteve uma atividade bimodal. Em termos de import?ncia na dieta, para ambas as esp?cies, os Hymenoptera/Formicidae e Isoptera predominaram na esta??o seca. Na esta??o chuvosa ainda que os Hymenoptera/Formicidae continuaram a ter maior import?ncia entre os itens alimentares, os lagartos predaram oportunisticamente larvas de Lepidoptera, larvas/adultos de Coleoptera e ninfas/adultos de Orthoptera. A medida de intensidade de forrageamento revelou diferen?as entre as esp?cies, especialmente na esta??o chuvosa, quando T. semitaeniatus foi mais ativo do que T. hispidus. A temperatura corp?rea m?dia em atividade de T. semitaeniatus foi significativamente superior a de T. hispidus. O comportamento termorregulat?rio mostrou que, durante a esta??o seca, T. hispidus e T. semitaeniatus gastaram mais tempo expostos ? sombra ou sob sol filtrado. Na esta??o chuvosa, T. hispidus n?o mostrou diferen?as no tempo gasto entre os locais de exposi??o ? luz, contudo T. semitaeniatus esteve a maior parte de seu tempo exposto ao sol ou sob sol filtrado. A reprodu??o de T. hispidus e T. semitaeniatus ocorreu entre a metade da esta??o seca e o in?cio da esta??o chuvosa. Em ambas as esp?cies, a atividade reprodutiva das f?meas foi influenciada pela precipita??o, enquanto os machos apresentaram espermatoz?ides nos test?culos ao longo de todo o ano, e sua atividade reprodutiva n?o foi relacionada com nenhuma das vari?veis clim?ticas analisadas. O estoque de gordura corp?rea variou inversamente com a atividade reprodutiva nas duas esp?cies, e n?o houve diferen?a entre f?meas e machos quanto a massa dos corpos adiposos. Conclu?mos que xvi a segrega??o entre T. hispidus e T. semitaeniatus nesta ?rea de caatinga ocorre no uso vertical do espa?o, na maior vagilidade de T. hispidus na utiliza??o de micro-h?bitats e maior amplitude de tamanho de seus itens alimentares. Adicionalmente, diferen?as sazonais significativas em rela??o ao per?odo de atividade, temperatura corp?rea, e comportamentos de forrageamento e termorregulat?rio entre essas duas esp?cies de Tropidurus, possibilitam a coexist?ncia.

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