01. Universidade Federal Rural de Pernambuco - UFRPE (Sede)
URI permanente desta comunidadehttps://arandu.ufrpe.br/handle/123456789/1
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6 resultados
Resultados da Pesquisa
Item Hábito alimentar da albacora branca (Thunnus alalunga) no Atlântico Sul Equatorial(2024-09-13) Sales, Vitória Carolina Dantas de Lima; Travassos, Paulo Eurico Pires Ferreira; Martins, Karla Mirella de Assis Bezerra; http://lattes.cnpq.br/9517816256433091; http://lattes.cnpq.br/0623255059511945; http://lattes.cnpq.br/4294200793056597Item Concentração de elementos-traço chumbo (Pb) e cobre (Cu) em tecidos de Chelonia mydas (Linnaeus, 1758) no Litoral Sul de Pernambuco, Nordeste do Brasil(2021-08-06) Queiroz, Emily Pereira de; Moura, Geraldo Jorge Barbosa de; Rodrigues, Midiã da Silva; http://lattes.cnpq.br/4953311636839935; http://lattes.cnpq.br/1348666346504103; http://lattes.cnpq.br/9237498056744804Between threats to sea turtles species is the contamination of marine enviroments caused by trace elements wich infiltrate into organisms through food, airways or skin and can be passed on by trophic levels. The species Chelonia mydas has coastal habits whose main diet item is seaweed, which had evidence of accumulation by trace elements. This work determined the concentrations of trace elements lead (Pb) and copper (Cu), in order to know the level of contamination of local individuals and the bioavailability of the elements in habitat. 43 samples of C. mydas liver and muscle organs from the southern coast of Pernambuco, Northeast Brazil, collected from November 2016 to November 2018 were used. The quantification was performed by an Inductively coupled plasma - optical emission spectrometry (ICP OES). Cu showed a greater amount in liver, while Pb was present in a higher concentration in muscle, not being detectable in liver. For Cu, the highest concentration found was 64,683 mg kg-1 (6,389–212,286) while for Pb it was 4,115mg kg-1 (1.4–7,424). The southern coast of Pernambuco showed higher concentrations than other Brazilian states and several areas around the world, showing how other threats to the species mask the impacts of these contaminants, whose accumulation mechanisms need further studies to be fully understood. The values found provide a basis for monitoring the species and contamination of the local habitat.Item Incidência de resíduos de pesca antes e durante a pandemia do COVID-19 no litoral norte de Pernambuco – Brasil(2021-12-10) Gomes, Gabriella Agnes de Oliveira Pester; Oliveira, Paulo Guilherme Vasconcelos de; Viana, Danielle de Lima; http://lattes.cnpq.br/5870460867763634; http://lattes.cnpq.br/5700488412022830; http://lattes.cnpq.br/0989776818751325Abandoned, Lost or otherwise discarded fishing gear (ALDFG), described in 2009, refers to equipment such as cables, nets and traps that continue with an active catching function without any monitoring. These devices have generated growing concern, as they are responsible for causing several negative environmental impacts, such as ghost fishing, responsible for the mortality of species present on the IUCN Red List of Threatened Species. In addition, ALDFG account for approximately 10% of marine litter. In 2019, with the start of the new Coronavirus pandemic (SARS-CoV-2), the use of beaches was prevented, interfering directly on the fishing activity. Given this scenario, the aim of this study was to analyze the influence of the social isolation on the fishing activity and the incidence of ALDFG in northern Pernambuco. As well as describing and characterizing the ALDFG found in the beach region and comparing their frequency among the analyzed beaches. The surveys were carried out in 2019 and 2020, in four beaches on the north coast of Pernambuco, one of which is located within the Acaú-Goiana Extractive Reserve. Active searches were carried out in the beach environment, by a group consisting of four people. Each pair walked the beach in the same cities, simultaneously, for an hour. The ALDFG were photographed and collected, in addition to being taken to the Fishing Oceanography Laboratory for quali-quantitative analysis. Additionally, observation per unit of effort (OPUE) and absolute and relative frequencies were calculated. Much of the collected material was grouped into bands of smaller length, weight, diameter and height, demonstrating the predominance of fragments. There was a significant decrease in the frequency of ALDFG after the period of prohibition of the use of the beaches, but the seasonal variation remained the same, indicating that the fishing activity in the north of the state was probably not completely interrupted. The cities showed a significant difference between them, probably due to differences in the use and management of space, demographic density, tourism and the presence of a fishermen community. Thus, measures are needed to promote greater awareness of the topic and prevent the formation of new ALDFG.Item Microplásticos do plâncton na porção norte da APA Costa dos Corais (Tamandaré, Brasil)(2019-12-13) Ferreira, Lucas Xavier; Melo Júnior, Mauro de; http://lattes.cnpq.br/6735233221650148; http://lattes.cnpq.br/7507756194543034Microplastics are particles smaller than 5 mm and can be broadly classified as: filamentous, hard fragments and soft fragments. These particles are among the main current solid contaminants in the marine environment. Such fragments can be released into the environment in different ways, such as degradation itself through biotic or abiotic factors. After being degraded, these particles can be suspended in the water column, thus being able to be ingested by organisms, especially filters at the base of the food chain. The work aims to characterize the plankton microplastics in the waters that bathe the northern portion of the Costa dos Corais Environmental Protection Area, in Tamandaré (PE), aiming at the evaluation of three planktonic compartments in the area (estuarine plume, in the reefs and in the bay ). Samples from 4 campaigns carried out between Sep / 2017 and Mar / 2018 were analyzed, aiming to sample periods with different rainfall regimes, always at low water (to better establish the influence of estuarine plumes). The analyzed microplastics were quantified and classified according to type. To confirm the visually screened microplastics, tests were performed with nitric acid (HNO3). The results show that there is a higher incidence of filamentous microplastics (12 ± 13 mp / m³), compared to other types. The presence of filamentous microplastics reached an average density of 16.08 ± 16.22 mp m³ in the plume, in the dry period, and in the rainy period it had an average of 21.62 ± 20.77 mp m³ in the reefs. . The densities of filamentous microplastics were significantly different between points (plume, bay and reefs). In each period, even with this variation between the points, the data indicate that there was a variation between the points, but if compared to other studies, the variation is not significant, although the bay has shown variation in relation to the other areas. In the present study, the seasonal period did not have a significant influence on the increase in the presence of microplastics in the studied points, even though microplastics are common in estuarine systems in several parts of the world, the fact that there were no seasonal differences in the studied points ( it was expected that during the rains the occurrence of microplastics would be higher) due to the insertion of the Ilhetas and Mamucabas estuaries in a protected region (APA Guadalupe and ReBio de Saltinho).Item Ocorrência e distribuição de microplásticos no Arquipélago de Abrolhos(2019-06-10) Silva, Myller Cardoso da; Melo Júnior, Mauro de; http://lattes.cnpq.br/6735233221650148; http://lattes.cnpq.br/1951306508450135Plastic pollution is a major threat to oceanic, coastal and marine biota environments and has been documented for the last 40 years. The study of pelagic microplastics in islands of the Atlantic Ocean is recurrent, where the islands retain plastics of the adjacent sea by different metaoceanographics mechanisms, being one of the main factors for the decline of native species and degradation of the natural beauty. The objectives of this work were to determine the abundance, spatial distribution, composition and classification of microplastics in the Abrolhos Archipelago. In addition to improving the technique of quantification and measurement of particles through the process of visual identification and digestion of organic particles by nitric acid (HNO₃), and compare the samples obtained in different mesh apertures (64 μm and 200 μm). The Abrolhos reef complex covers the largest area of coral reefs in Brazil and the entire South Atlantic Ocean. The study region concentrated on points located about 10 - 70 km offshore. To identify the particles, techniques of visual counting and digestion by nitric acid were used. The densities underwent non-parametric statistical tests such as Wilcoxon / Mann -Whitney and Kruskal Wallis) to compare the central trends of the samples. Microplastics were classified according to their type: filaments, soft plastics, hard plastics and styrofoam. The 64 μm mesh was more effective in the capture of microplastics (4.19 mp / m-3) and 1.87 mp / m-3 in the 200 μm mesh. The two networks presented a similar general collection composition, since both had higher densities of filaments (64 μm 2.49 mp / m-3 and 2.15 mp / m-3 in the 200 μm mesh). The region farthest from the continent has a higher density of microplastics, as well as in the region closest to the coast. The use of the smaller mesh increases the collection capacity of plastic items, especially for filaments. Further research is needed to understand the distribution of microplastics and seek a mitigation of the various environmental problems caused by them.Item Plâncton e microplásticos flutuantes dos recifes de Serrambi (Ipojuca, PE), durante um ciclo circadiano(2018-08-15) Silva, Josefa Luana de Aguiar; Melo Júnior, Mauro de; http://lattes.cnpq.br/6735233221650148; http://lattes.cnpq.br/0782368445581490Reef plankton is of vital importance to marine ecosystems as it represents the basis of the pelagic food web in the oceans, and changes in its composition and structure can cause profound changes at all trophic levels. This study aimed to understand the dynamics of the plankton community and the floating microplásticos of the Serrambi beach reefs located in Ipojuca, south coast of Pernambuco, and whether there is influence of a circadian cycle on the structure of these important plots of the pelagic system. The sampling campaign was carried out during a complete circadian cycle in a rainy season, corresponding to the following moments: (i) daytime ebb tide; (ii) nocturnal ebb tide; (iii) daytime flood tide; and (iv) night flood tide. Samples were collected from horizontal trawls and near the reefs, using plankton nets of 20 μm (phytoplankton) and 65 μm (zooplankton). For the microplastics, the samples of this last plot were considered. The phytoplankton groups observed were cyanobacteria, diatoms and dinoflagellates. The values of the phytoplankton density were very different in the four collection times, varying between 123.82 and 1783.02 cells / L, with numerical predominance of diatoms (93.5%). As for zooplankton, the variation in the occurrence of the zooplankton groups was relatively low on all four occasions; however, the density found was very high during daytime (38943.4 ind. m-3) and nocturnal (38460.4 ind. . m-3), with emphasis on copepods (65.92%). Considering microplastics, (i) yarns and lint were found, (ii) hard fragments and (iii) soft fragments of microplastics, all of secondary origin of different colors and sizes, demonstrating several possible sources. The values of the microplastic densities during the circadian cycle are very similar, ranging from 5.19 microns. m-3 (night flood) and 17.69 microns. m-3 (nocturnal ebb), demonstrating also to respond to tidal variation. These results demonstrate how tidal variations occurring along a circadian cycle may have a strong influence on the structure and dynamics of plankton and microplastics. In addition, it is possible to infer that the main environmental variable along the circadian cycle to act on these elements is the tidal variation, with potential influence on the upper trophic links and dependent on seston particles.