Programa de Pós-Graduação em Zoologia - PPGZOOL/ICB
URI Permanente desta comunidadehttps://repositorio.ufpa.br/handle/2011/2343
O Programa de Pós-Graduação em Zoologia (PPGZOOL) do Instituto de Ciências Biológicas (ICB) foi consolidado como um convênio entre Universidade Federal do Pará (UFPA) e Museu Paraense Emílio Goeldi (MPEG).
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Navegando Programa de Pós-Graduação em Zoologia - PPGZOOL/ICB por Orientadores "FERNANDES, Marcus Emanuel Barroncas"
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Item Acesso aberto (Open Access) Interação de Ucides cordatus Linnaeus, 1763 em manguezais da Ilha de Marajó: uma abordagem ecológica(Universidade Federal do Pará, 2012) GOMES, Cleidson Paiva; FERNANDES, Marcus Emanuel Barroncas; http://lattes.cnpq.br/8943067124521530The present study was carried out in the mangroves of Soure, Marajó Island, Pará, Brazil, where the great amount of freshwater intake allows the development of transition zones estuary/river defining the geobotanic limits for mangroves in the state of Pará and, hence, for the leaf-removing mangrove crab (Ucididae). For an ecological approach on the interaction between U. cordatus and mangrove forests the following issues were investigated: i) the relationship between the population characteristics of U. cordatus and different transition levels along the gradient of vegetation between mangrove forests and tidal valley forests, ii) the influence of environmental factors of such transition zones on patterns of size and density of U. cordatus population, iii) the impacts of herbivory of U. cordatus on the seedlings production and the possible effects on recruitment process of these seedlings for mangrove forests. Study sites were classified according to the transition level of the tidal várzea forests, and these values correlated with density and size values of U. cordatus population. In each study site the availability of food by litterfall rates, salinity, and indicators of fishing activities on these areas were determined. The impact of U. cordatus on the recruitment of mangrove stands was evaluated by estimating the rate of herbivory and predation on propagules. The results reveal that in the zone of "high transition" local conditions seem to limit U. cordatus stocks, showing that the density of this species population is much lower compared to those recorded in the "low transition" zone. However, areas of high transition offer more favorable conditions for development of the leaf-removing mangrove crab populations, especially with regard to the variability and availability of food and protection from human action in the region. The indicators of fishing activity on U. cordatus revealed that the mangrove forests of the lower transition zone are more subject to overexploitation, mainly for ease of access. The main via of impact on propagules was the consumption rate of 60%, being the rate of export of propagules by tides of only 1%, thus less relevant. U. cordatus may be considered the most important impact agent on the propagules production of these mangrove forests without showing selectivity by size or maturity of seedlings, being important in the regulation of recruitment rates and, hence, in the population dynamics of Rhizophora’s trees in the mangrove forests on the coastal zone of Marajó Island, in the Brazilian Amazon.Item Acesso aberto (Open Access) Riqueza e abundância de galhas em espécies arbóreas de mangue, com ênfase em Avicennia germinans (L.) Stearn (Acanthaceae), na península de Ajuruteua, Bragança, Pará, Brasil(Universidade Federal do Pará, 2011) SANTOS, Rita de Cassia Oliveira dos; FERNANDES, Marcus Emanuel Barroncas; http://lattes.cnpq.br/8943067124521530Item Acesso aberto (Open Access) Variabilidade morfométrica e molecular em Desmodus rotundus (Chiroptera, Phyllostomidae) de diferentes áreas de risco para raiva rural no estado do Pará, Brasil(Universidade Federal do Pará, 2011) ANDRADE, Fernanda Atanaena Gonçalves de; FERNANDES, Marcus Emanuel Barroncas; http://lattes.cnpq.br/8943067124521530At the present study the hypothesis of population morphological and molecular heterogeneity was tested in several groups of the common vampire bat Desmodus rotundus from oriental Amazonia as well the relationship among the environmental heterogeneity and the process and patterns of rabies outbreaks in human and bovine population was described. For this 776 individuals of common vampire bats from 72 different places of state of Pará were disposed by Instituto Evandro Chagas (IEC - Ministério da Saúde/Belém), Laboratório Nacional Agropecuário (Lanagro/Belém) and Fundação de Vigilância em Saúde do Amazonas (FVG/Manaus). Data from 1999 to 2008 of rabies upon humans and bovines in Pará were disposed by the Secretaria Executiva de Saúde Pública do Pará (SESPA). For morphometric analysis, 39 phenotypic measures (16 bodies and 23 cranials) all adult individuals (329 males and 315 females) were obtained. For genetic analysis, 258 bats (47% males and 53% females) were characterized by 10 microsatelite markers. To describe the areas of rabies risk we used the ecological, biological and socioeconomic shapes of environment as well the soil using, all these geographically georeferenced. One of our results of phenotypic inferences suggest that vampires from Pará showed the tendency to group formation with individuals of the north region of state (Amazonas basin, Marajóand Northeastern regions), only as well they were less similar to bats from southern and southwestern regions. In general, D. rotundus did not show high phenotypically structure among the groups in Pará. The highest variability occurrence in D. rotundus, was not observed among geographic groups. According to molecular analysis of variance (AMOVA), 96% of them were found within each studied group. Our data showed that several of the groups studied in Pará are still under Hardy-Weinberg equilibrium, suggesting the existence of one single panmitic population of the common vampire bat in this North state, but with tendencies to the formation of three great groups (Amazon basin, Marajóand Northeast). To this panmitic population, the reproduction and adaptation patterns garanteed the high equity of allelic richness and good rates of genetic diversity in D. rotundus from oriental Amazon, even under the fragmentation effects in many areas of Pará state, mainly in the east side.