Navegando por Assunto "Maracanã - PA"

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Acesso aberto (Open Access)
Avaliação e comparação de projetos comunitários de ostreicultura localizados no nordeste paraense
(Universidade Federal do Pará, 2009) HOSHINO, Priscila; MCGRATH, David Gibbs; http://lattes.cnpq.br/4373475491613670
The aquaculture is being characterized as strategy to minimize the reduction of the fish. At Pará, the oyster farming was implanted in 2003 as an opportunity regarding to occupation and profits generation at Northeastern of this state. In 2005 this initiative was expanded to other communities with different levels of familiarity with the mollusk, regarding to the support either on the researches in this sector or on the extractive activity. This research evaluated the communitarian oyster farming performance in the state of Pará. It was studied three projects with at least two years of implementation and with either different levels of preservation and oyster harvest activity. The implementation of the firsts cultivations occurred simultaneously and in a similar way regarding to institutional support, however with different performances. The main producer issues are to obtain the license to develop this activity and also the necessity to take care about the tide. It is necessary to provide more detailed feasibility studies, with more commitment from the side of the interested institutions in order to perform the actions they are supposed to work out, providing events where it will be possible to spread the information and discuss the aquaculture bottlenecks at the state of Pará, as well to provide a consolidated partners network to prepare the groups regarding to organization, activity management and helping in the market access. The most part of the oyster famers are small producers, artisanal fishermen that found a way to manage their families via oyster farming. However, the oyster farming is a secondary activity to them, once it is still not enough to support their necessities. Nevertheless, several farmers already declared once they manage how to increase the oyster production they will be exclusively dedicated to this activity.
Acesso aberto (Open Access)
Comunidades tradicionais em áreas litorâneas da Amazônia: estudo sobre desenvolvimento local em Vila Mota, Pará, Brasil
(Universidade Federal do Pará, 2014-04) PINHEIRO, José Olenilson Costa; DARNET, Laura Angélica Ferreira
The paper presents the socioeconomic dimension in Vila Mota, municipality of Maracanã, state of Pará, and its repercussion in the local development process, understood as the fulfillment of basic human needs. Vila Mota is a community of traditional fishing located in the Reserva Extrativista Marinha de Maracanã (marine extractive reserve). The conditions of life in this community were observed and analyzed according to some indicators that make up the Human Development Index (HDI) and its variants. Limiting and enhancer factors for local development were also identified. The survey was carried out in 2007 and took into account 72 families representing 48% of the total available. The results indicated that housekeeping was impaired in families that have developed small-scale fishing as the only productive activity, given that the monetary income for 62.5% of these families was less than a minimum wage. The conditions of education and natural resources were enhancer factors to the development, although the most part of inhabitants did not know the purposes of the marine reserve. The absence of a cooperative culture, the lack of a structure for production, transportation and marketing, and the disability of health services were evidences of a low capacity for socio-political organization, with direct impact on local development.
Acesso aberto (Open Access)
Eficiência de diferentes abordagens metodológicas e caracterização das associações macrobentônicas estuarinas da zona costeira amazônica
(Universidade Federal do Pará, 2009-06-10) MONTEIRO, Viviane Ferreira; ROSA FILHO, José Souto; http://lattes.cnpq.br/3223362071251898
The estuarine macrobenthic communities from Amazonian coastal regions were characterized using different mesh sizes and sampling depths. The samplings were performed in Algodoal island and peninsula of Ajuruteua (PA), during rainy and dry seasons (June and December 2007, respectively) at the following habitats: mangrove edge, mangrove, sandy and muddy-sandy paths. At each habitat eight biological samples were collected using a cylindrical corer with 0.0079 m², as well as samples for sediment analysis (texture, moisture and organic matter concentrations) and chlorophyll a and pheopigments concentrations. Each biological sample was devided into three strata (0-5, 5-10 and 10-20 cm) and they were sieved on mesh screen sizes of 1.0, 0.5, 0.3 and 0.25 mm. Univariate (ANOVA) and multivariate (MDS, ANOSIM, SIMPER and BIOENV) techniques were used for data analysis. Macrofaunal composition consisted of 68 taxa with dominance of Annelida (Tubificidae and Capitellidae). Meshes of 0.3 and 0.25 mm were the most efficient in terms of retention of organisms and species, while the mesh of 1.0 mm lost significant quantities of organisms, especially Tubificidae. The samples collected at 10 and 20 cm depth did not differ significantly regarding to the number of taxa and organisms. Significant spatial variations were observed on the macrofaunal structure between habitats in both locations and sampling moments, with higher density and richness in muddy paths (mangrove edge and mangrove). The amount of clay, organic matter and moisture concentrations of the sediment were the most correlated environmental variables with the fauna. It could be concluded that: 1. the benthic macrofauna in Algodoal island and peninsula of Ajuruteua was composed by few taxa, and those were typically estuarine and of small dimensions, dominated by Annelida; 2. for characterization of benthic macrofauna is necessary to take samples at 10 cm depth and sieve them on mesh of 0.3 mm size; 3. Muddy-sandy habitats presented normally highest densities and richness; 4. only in Algodoal island was observed temporal variation in the structure of benthic macrofauna; 5. the amount of clay, pheopigments and moisture content in the sediment were the main factors responsible for macrofaunal structure.
Acesso aberto (Open Access)
Estrutura populacional, uso de ambientes e crescimento corporal de Rhinoclemmys punctularia punctularia (DAUDIN, 1801), na Ilha de Algodoal/Maiandeua, Maracanã, Pará, Brasil
(Universidade Federal do Pará, 2010-02-26) FIGUEIREDO, Manoela Wariss; PEZZUTI, Juarez Carlos Brito; http://lattes.cnpq.br/3852277891994862; ISAAC, Victoria Judith; http://lattes.cnpq.br/3696530797888724
For Rhinoclemmys punctularia punctularia (Daudin, 1801), until this study, there were no further studies that focused on their ecology in natural environment. In general, the existing works are based on few records at different locations in range of the species and data from animals in captivity, such reports have described the species as a generalist in relation to their feeding and the use of environments. This study aimed to evaluate the use of environments, the population structure and estimate the constant growth of the Rhinoclemmys punctularia punctularia in Island of Algodoal/Maiandeua, which is an environmental protection area (APA). As methodology were conducted experimental fishing in different environments of the APA of Algodoal/Maiandeua, between the years 2008 and 2009. Of the sampled specimens were captured only environments without the influence of marine waters and abundant food resources, such as the fruits of Annona sp. and Chysobalanus sp.. Environments used by R. p. punctularia (flooded forest, temporary ponds and lagoons of the plain), the highest yields were found in lagoons of the plain, where there is a greater availability of fruits of Annona sp. and Chysobalanus sp in water bodies that the species occupies. The population of R. p. punctularia in Algodoal/Maiandeua is mainly composed of adults and is slightly skewed towards females (0.43 males). The average length of females is 195.42±18 mm (range 43-226 mm) (n=68) while the males is 167±12.7 mm (range 133-197mm) (n=64), the females being statistically larger than males (U=454.02; GL=132, p=0.0001, n=132). In both sexes there was a significantly negative relationship between growth rate and length of the carapace. The model of von Bertallanfy was an estimated value of k=0.19 year-1 for males and k=0.16 year-1 for females, since the values of L∞ were 207.36 mm and 237.89 mm for males and females, respectively. When you reach the CRC 237 mm for females and 207 mm for males, the species reaches the age of about 33 years in both sexes.
Acesso aberto (Open Access)
Estudo morfoestratigráfico e sedimentológico dos depósitos holocênicos da planície costeira de Maracanã – NE do Pará
(Universidade Federal do Pará, 2007-03-15) CARVALHO, Charles de Almeida; EL-ROBRINI, Maâmar; http://lattes.cnpq.br/5707365981163429
The Maracanã Coastal Plain is located in the northeastern part of the Para State where there are some coastal rias. This place is over tertiary sediments of the Barreiras and Pirabas Formations as well as is over quaternary sediments of the Pos-Barreiras. The Maracana Coastal Plain is influenced by an macrotidal regime (amplitude > 4 m). The Maracana Coastal Plain is characterized by three different geomorphologic domains: (1) Coastal Upland that presents active and inactive cliffs, and platforms of abrasion build in the laterites of Barreiras Formation as well as outcrop of the limestone from Pirabas Formation; (2) Coastal Plain that presents coastal dune fields and palaedunes, beach, mud-tide flat (mangrove), sandy plain, edd-tide delta, beach ridge plain and lakes; (3) Estuarine Plain which presents estuarine funnel, tidal channel and floodflat. In the Maracana Coastal Plain were identified nine morfostratigraphic units: (1) mud-tidal flat, (2) point bar, (3) Sandy plain, (4) dune, (5) paleodune, (6) beach, (7) ebbtide delta, (8) beach ridge plain, and (9) lake. These morfostratigraphic units are associated to three stratigraphic facies: (1) sand facies and point bar mud facies (sandy and muddy) that show alternate layers of greenish gray mud and light gray sand; (2) sea sand facies located over infratide mangrove that it has light olive gray and yellowish gray sands; (3) estuarine mud-sand facies that mean a variable thicking alternate layers with dark gray mud or greenish gray mud. In the Maracana Coastal Plain were characterized three depositional sequences: (1) Basal Transgressive Marine Succession S1, (2) Regressive Marine Succession S2 and (3) Transgressive Marine Succession S3. S1 show mid-large sand in its base (tidal channel) so that following by dark mud with high concentrations of organic matter (sand-silty clay). In these base, the sand is in moderate selection, but to top the sand is fine to middle size and it’s negative asymmetry. Distribution of the mineral clay was homogeneous (kaolinite = 45 %, ilite = 37 % and smectite = 18 %). Heavy minerals show larger concentration in the sandy facies, but the relative amount these minerals increased upward which owing zircon (35 %), staurolite (28 %), epidote (9 %) and cianita (11 %) presences. This sequence of sediments marks an estuarine mud, sea sand and seamud depositions during marine transgressive period. S2 is constituted by thin-very thin, well selected, near asymmetric sand that could be classified as clay-sand sediment. The mineral clay is represented by slight increase of the smectite as well as a decrease of the kaolinite in top sequence. The main heavy mineral located in the point bar are staurolite (44 %), zircon (39 %) and tourmaline (9 %) while there are zircon (39 %) and staurolite (27 %) contents at bottom sequence. This sequence was build during a marine regressive period from coastal upland so that consist the progradational deposits over sequence S1. The sequence S3 corresponds to unit of dunes, barrier-arrow beach, sandy and muddy bars. Coastal dune deposits show some crossing stratification to slow slope and thin layer of mud. Beach deposits show crossing stratus in low angle. Sandy bars presents a full structure with some bioturbation. The contents of sand are well selected and it has quartz as main mineral. The amount of heavy mineral was lower at top layer. Composition and texture of heavy mineral provide a rounding shape of the sediments because it has been transported, reworked and it was suffering a strong abrasion. In the Maracana Coastal Plain, grain size and mineral distribution are homogeneous being not possible to determine a clear edge between stratigraphic sequences either continental contribution or sea sediment source. There are so many morphologic features (cheniers, paleochannel, paleodelta) and some stratigraphic characteristics that suggest an occurrence of sea level oscillations as well as a migration in the shoreline position. The presence of transition environment deposits (tide flat) show some stratigraphic evidence in the study area. The Maracana Coastal Plain and the northeastern coastal area of the Para State (Bragança, Salinopolis and Marapanim) are over actual transgression event (large sandy plain and beach presences).