DISSERTAÇÃO DE MESTRADO - PROGRAMA DE PÓS-GRADUAÇÃO EM BIODIVERSIDADE E CONSERVAÇÃO

URI Permanente para esta coleçãohttps://tedebc-teste.ufma.br/handle/tede/282

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Navegando DISSERTAÇÃO DE MESTRADO - PROGRAMA DE PÓS-GRADUAÇÃO EM BIODIVERSIDADE E CONSERVAÇÃO por Autor "BARRETO, Larissa Nascimento"

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    Biologia da tartaruga de água doce Mesoclemmys tuberculata (LUEDERWALDT, 1926)(TESTUDINES:CHELIDA) da Ilha de São Cosme , Pequenos Lençois Maranhenses,Brasi
    (Universidade Federal do Maranhão, 2016-02-22) SANTIAGO, Paula Maria Mesquita; BARRETO, Larissa Nascimento; 351.788.843-53; http://lattes.cnpq.br/1295307492454506; ANDRADE, Gilda Vasconcellos de; http://lattes.cnpq.br/1762004877075277; REBELO, George Henrique; http://lattes.cnpq.br/8942738925481880
    Knowledge of the diet and histology of language is potentially important for clarify the alimentary composition, the arrangement and the cellular morphology, facilitating the understanding of animal biology. In this way, this research aims to to analyze Mesoclemmys' diet, food strategy and morphohistology tuberculata. The collections were carried out on the Island of São Cosme in the Little Lençóis Maranhenses, municipality of Paulino Neves. For capture of the animals was used traps of the type "Fyke nets", active search, trawl and covo. The contents were collected by means of stomach lavage in the period from April 2014 to May. The stomach contents were observed under a microscope stereoscopic; the prey were identified and classified into categories and the volumes. The importance of the different items was quantified through the Food Importance (IIA). Similarity in the diet between the sexes was evaluated through Simplified Morisita index and the food strategy through the Costello Diagram. For morphological analysis of the tongue, samples of the tongue of four species of the species Mesoclemmys tuberculata that were euthanized, these were fixed in 10% formalin and included in paraffin by standard histological technique. The species Mesoclemmys tuberculata has a diet based on animal and benthic items with dominance of Nymph of Odonata (Fo% -49%, Vo% - 45,8%, IIA-0,69) and Mollusk (I% -38% and Vo% -18.5%, IIA -0.21), niche overlap between males and females females, there are no dietary differences between classes of sizes and presents diet specialist with high inter-phenotype component. Histology confirmed the diet data found. The tongue of Mesoclemmys tuberculata histologically is a tongue small with non-keratinized cubic stratified epithelial tissue with few papillae, typical of aquatic carnivorous animals that feed through suction.
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    Uso de nicho espacial por girinos nectônicos
    (Universidade Federal do Maranhão, 2018-12-19) PEIXOTO NETO, Carlos Alberto Algarves; ANDRADE, Gilda Vasconcellos de; http://lattes.cnpq.br/1762004877075277; ANDRADE, Gilda Vasconcellos de; http://lattes.cnpq.br/1762004877075277; ROSSA-FERES, Denise Cerqueira de; http://lattes.cnpq.br/6863776138321135; BARRETO, Larissa Nascimento; http://lattes.cnpq.br/1295307492454506
    Competition is among the processes that structure neotropical tadpole communities. Little is known about how the choice of microhabitat influences the distribution of neotropical tadpoles. We investigated whether the tadpoles of Scinax x-signatus and Scinax fuscomarginatus overlapped the spatial niche and presented a segregated distribution in 15 temporary temporary ponds on the island of Maranhão, northeastern Brazil. In laboratory, we tested the hypothesis that large size tadpoles of S. x-signatus would not be affected in the use of spatial resources for foraging by small size tadpoles of the same species or small size tadpoles of S. fuscomarginatus. For laboratory experiments, tadpoles of different spawnings were collected in temporary open water bodies. After acclimatization we filmed the interactions between species and different sizes of tadpoles in an experimental design with focal tadpoles of Scinax x-signatus of small size (n = 30), focal larvae of S. x-signatus of large size (n = 30) and tadpoles of S. fuscomarginatus (n = 60). Slides with food (algae) arranged in the aquarium made it possible to evaluate the use of space by tadpoles. The use of the height of the slide (Vertical Position) and displacement among different slides (Horizontal Position) by tadpoles were obtained by analysing the videos. For the analysis of spatial niche overlap and observed co-occurrence pattern we used the EcoSim software. To identify the preference in the use of the space we used mixed models, function lme with a posterior test of Tukey in the software R. In the ponds, the species are overlapping in the use of environmental resources, but they differ in the frequency of use. In the experiment, the small focal tadpoles of S. x-signatus, which occupy smaller to medium depths, altered the horizontal position in the presence of coespecific larger tadpoles or tadpoles of S. fuscomarginatus. While large focal tadpoles, which occupy the greater depths, in the presence of a coespecific or heterospecific tadpole changed the height of foraging. Thus, the small tadpoles seem to try to avoid interaction, whereas the large tadpoles seem to alter the position in the water column to occupy the space that smaller tadpoles can use.
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    Variabilidade genética de duas populações de Kinosternon scorpioides No Maranhão, Nordeste do Brasil, com base na região controladora do mtDNA.
    (Universidade Federal do Maranhão, 2016-06-25) NUNES, Mayara Monteles de Almeida; ANDRADE, Marcelo Souza de; http://lattes.cnpq.br/6267637354657076; BARRETO, Larissa Nascimento; BARRETO, Larissa Nascimento; http://lattes.cnpq.br/1295307492454506; ANDRADE, Marcelo Souza de; http://lattes.cnpq.br/6267637354657076; LEAL, Emygdia Rosa Pires; http://lattes.cnpq.br/0374728351065012; SILVA, Marcelo Magalhães; http://lattes.cnpq.br/5367804470044420
    Kinosternon scorpioides, known as swear is one of the best known species of freshwater turtles in Brazil with wide distribution in South America in Central America and Mexico. In the state of Maranhão were found 06 species of freshwater turtles. Among the Terrapins, the swear is one of the least known to science. Knowledge of the genetic makeup of some sort is necessary to evaluate the variability levels found in natural populations and defining population structure by philogeography. Thus, the aim of this study was to evaluate the genetic diversity of populations had sworn the coastal region of Curupu-MA Island (L1) and the Continental Region of Baixada Maranhense in São Bento (L2). For genetic variability analysis was used to control region of DNA mitocondrial.O blood of the animals was collected and extracted DNA. The fragments of the mtDNA control region (CR) were PCR amplified, purified and sequenced. Fifteen specimens were analyzed between these six L1 region and L2 region nine. Individuals of L1 region is not newly introduced specimens according to analyze the haplotype network have generated with genetic distance L2 of individuals. The analysis of a control region of mtDNA may be relevant to species because it was found a clade forming a haplotype different from the other two species of the genus. In these analyzes it can be concluded that populations have genetic variability, noting the difference between these in the haplotype network generated and the differences with the external groups of aligned sequences, yet the deepening of genetic studies is likely to support strategies for the conservation of the species.