Bacharelado em Ciências Biológicas (Sede)
URI permanente desta comunidadehttps://arandu.ufrpe.br/handle/123456789/5
Siglas das Coleções:
APP - Artigo Publicado em Periódico
TAE - Trabalho Apresentado em Evento
TCC - Trabalho de Conclusão de Curso
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3 resultados
Resultados da Pesquisa
Item 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 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.