Programa de Pós-Graduação em Ecologia Aquática e Pesca - PPGEAP/NEAP
URI Permanente desta comunidadehttps://repositorio.ufpa.br/handle/2011/3478
O Programa de Pós-Graduação em Ecologia Aquática e Pesca (PPGEAP) integra o Núcleo de Ecologia Aquática e Pesca da Amazônia (NEAP) da Universidade Federal do Pará (UFPA). Focaliza os problemas relacionados com a conservação e com a gestão dos ecossistemas aquáticos amazônicos, decorrentes do uso dos seus recursos naturais pelo homem, em particular os recursos pesqueiros, para atividades de desenvolvimento econômico e regional.Tem como objetivo geral capacitar recursos humanos capazes de compreender de forma integrada a complexa dinâmica dos ecossistemas aquáticos da Amazônia, visando o uso racional dos seus recursos e sua conservação.
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Item Acesso aberto (Open Access) Avaliação sanitária de água de cultivo e de ostras da zona do salgado, nordeste do Estado do Pará - Brasil(Universidade Federal do Pará, 2011-04-19) KIYATAKE, Daniela Mayumi; RIBEIRO, Karla Tereza Silva; http://lattes.cnpq.br/2654817572738748; PAIVA, Rosildo Santos; http://lattes.cnpq.br/0510818763187669The cultivation of oyster species of the genus Crassostrea is expanding in the northeast of the Brazilian state of Pará. This study analyzes the sanitary quality of the oysters and the water in which they are cultivated in the local municipality of São Caetano de Odivelas and Curuçá. Samples were collected monthly between June, 2009, and May, 2010. Water samples were collected from the flood and the ebb tides, and approximately 15 oysters were obtained each month. Coliform concentrations were determined using the multiple-tube fermentation technique, followed by the biochemical identification of the bacteria and determination the susceptibility profile of Escherichia coli isolated from oysters and water samples. The geometric mean concentration of thermotolerant coliforms in the water was 119 MPN/100 mL in São Caetano de Odivelas and 163,21 MPN/100 mL in Curuçá, well above the limit of 43 MPN/100 mL established by the Brazilian National Environment Council (CONAMA). As Brazilian legislation on the sanitary quality of bivalve mollusks covers only the processed product, the European Union legislation, which assigns oysters for raw consumption to three sanitary classes, was adopted for the evaluation of the results of the present study. In São Caetano de Odivelas only two of the samples collected during this study were assigned to class A, seven samples to class B and three samples to class C. While in Curuçá three samples were assigned to class A, seven samples to class C and two samples to class C. The results suggest the need for mitigation measures to ensure the health quality of the oysters, such as the application of methods of depuration.Item Acesso aberto (Open Access) Dinâmica da comunidade microfitoplanctônica relacionada com os parâmetros físico-químicos do estuário do rio Guajará-Mirim (Vigia - PA)(Universidade Federal do Pará, 2009-03-31) CARDOSO, Fábio Ferreira; PAIVA, Rosildo Santos; http://lattes.cnpq.br/0510818763187669Estuaries are rich nutrients environments, favoring reproduction and development of several species. Phytoplankton represents a considerable portion of primary production in these environments and, together with other factors, regulates the biological productivity levels. This study aimed to know the microphytoplankton dynamics and its correlation with environmental factors in the Guajará-mirim river’s estuary in the city of Vigia-PA, an important fishery center of the Pará state. Every two months were made collections of the phytoplankton and take measurements of physicochemical parameters in four collection stations along the estuary, in ebb and flood tide periods. Were determined the specific composition and density of microphytoplankton (org.L-1) and analysis of frequency of occurrence, diversity and evenness, clustering and principal components. Seasonally, was noted, mainly during the ebb tide, a considerable physicochemical variation, strongly related with hydrological cycle in the region. Seventy-eight taxa were recorded belonging to the Bacillariophyta (65), Chlorophyta (6), Cyanophyta (3), Dinophyta (3) and Ochrophyta (1) divisions. Bacillariophyta was dominant in species number, frequency of occurrence and density (99.89%). The monthly average densities of the microphytoplankton ranged from 9.999 (July) to 535.411 org L-1 (January). In January happened a bloom of Skeletonema costatum (max = 1.996.613 org.L-1). The microphytoplankton community was characterized as the median diversity (annual general mean = 2.40). The seasonal variation of physicochemical parameters and species density was the predominant factor to the grouping of samples, and it formed two major groups, the first composed by samples of the rainy season and the second by samples of the drought period. The principal components analysis showed that, despite the physicochemical parameters have low spatial and seasonal variability, the variation in rate of rainfall, total dissolved solids content and salinity was decisive in the variation of density of most species and also promoted a slight increase in diversity in the drought period.Item Acesso aberto (Open Access) Estrutura da comunidade microfitoplanctônica da área de influência da UHE de Tucuruí-Pará(Universidade Federal do Pará, 2011-06-02) TAVARES, Milena Daisy Ribeiro Monteiro; PAIVA, Rosildo Santos; http://lattes.cnpq.br/0510818763187669Item Acesso aberto (Open Access) Variação espaço temporal da comunidade zooplanctônica em viveiros de cultivo de camarão branco, Litopenaeus vannamei (Boone, 1931), no município Curuçá, Pará-Brasil(Universidade Federal do Pará, 2011-04-04) NASCIMENTO, Atilla Melo do; PAIVA, Rosildo Santos; http://lattes.cnpq.br/0510818763187669Item Acesso aberto (Open Access) Variação nictemeral do microfitoplâncton em um estuário do nordeste paraense, Brasil(Universidade Federal do Pará, 2010-06-18) COSTA, Brenda Oliveira da; PAIVA, Rosildo Santos; http://lattes.cnpq.br/0510818763187669This study’s object was to get to know micro phytoplankton’s diversity, as its nyctemeral variation related to environmental factors on Curuçá river (Curuçá, PA – Brazil). Twelve phytoplankton samples were collected in 3 collecting spots next to a Littopnaeus vannamei sea shrimp farm in a 24 hour time, during spring tides on the 14th and 15th of august 2004 and on the 24th and 25th of January 2005. It was determined its specific composition and phytoplankton density (org.L-1), analyzed its occurrence rate, diversity and evenness, grouping and main components. Physicochemical parameters did not show any significant variability between the collecting months, though it was observed an important rainfall influence on the salinity, filing the bottom values in jan/05 and the top ones in aug/04. There were 170 registered taxa that belong to the Baccilariophyta (149), Dinophyta (16), Chlorophyta (3) and Cyanobacteria (2) divisions. Bacillariophyta had the higher number of species shown, higher occurrence and density (97.59%). A few showed high abundance rates. During August the phytoplankton community is dominated by Bacteriastrum hyalinum, Bellerochea horologicalis, Chaetoceros curvisetus, Dimerograma dubium, Dytilium brigtwelli, Pseudo-nitzschia seriata and Skeletonema costatum. In January predominated Chaetoceros pseudocrinitus, Chaetoceros curvisetus and Skeletonema costatum. Neritic marine planktonic species, oceanic marine planktonic, neritic-oceanic marine planktonic predominated the samples. Specific diversity oscillated from 0.7591 bits.org-1 to 1.3314 bits. org-1 generally characterized by a low to very low diversity, showing a poorly diversified structure. Phisicochemical parameters and density among species was the main factor to determinate sample grouping in two big groups: the first one with august samples and the second one with January samples. Its component analysis showed that despite its low physicochemical variation amongst the collecting months, the rainfall and salinity variations were really important on the species density, causing an increase on phytoplankton density in January.