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 Caracterização das propriedades químicas e biológicas do muco cloacal das tartarugas marinhas - Ipojuca/PE(2018-08-24) Souza, Daliana Thaisa Maria Teles de Oliveira; Santos, Ednilza Maranhão dos; Oliveira, Lourinalda Luiza Dantas da Silva Selva de; http://lattes.cnpq.br/5812920432455297; http://lattes.cnpq.br/4538607373477161Sea turtles are migratory animals that travel long distances and have a complex life cycle. They are bioindicators and biocontrol animals, contributing to the maintenance of the marine ecosystem. These animals exert great effort in choosing the spawning site to ensure reproductive success. Of the seven species that exist in the world, five occur in Brazil, and all are classified at some level of threat of extinction. There are many threats that turtles face in order to reach adulthood, one of which is related to marine pollution due to chemical compounds that have become an increasingly common reality for these animals. At the time of spawning the turtle releases a light-colored mucus that coats all eggs, thus avoiding the impact between one egg and another and maintaining cloaca lubrication, however the characterization of chemical properties and toxicity have not been documented. The objective of this work was to characterize the chemical properties, the toxicity of the substance and to identify the heavy metals present in the cloacal mucus of the sea turtles. From August 2017 to October 2018, manual collection of cloacal mucus was performed, which took place immediately after spawning, with the aid of a 15 ml falcon tube positioned below the cloaca. Ten females were sampled, nine from Eretmochelys imbricata and one from Chelonia mydas, in the coast of Ipojuca / PE. These had a physical chemical aspect with turbidity in some samples, their pH ranged from 8.58 to 9.28 with a tendency to be alkaline, through the mortality numbers of Artemias salina nauplii the mucus showed a variation in its toxicity of very Toxic to slightly toxic, the amount of protein varied in the samples in concentrations from 0.27 mg to 5.17 mg, for heavy metals the highest concentrations were for Aluminum (35.5 mg / L), followed by Iron (28 , 7 mg / L) and Copper with (26.9 mg / L) besides these were also analyzed Manganese (16.1 mg / L), Lead (15.7 mg / L), Nickel (14 mg / L), Cadmium (13.5 mg / L) and Chromium (12.1 mg / L). The analysis showed that mucus is a good biological material for toxicity analysis and metal identification, however there is much to characterize in its chemical composition, requiring the continuity of this work to monitor the animals, as well as to evaluate space-seasonal issues of these metals. Mucus may be a good predictor of animal and environmental health.Item O uso da esqueletocronologia para estimar idade em tartarugas marinhas(2020-01-03) Filgueira, Maysa Arcanjo; Sá, Fabrício Bezerra de; Guimarães, Elisângela da Silva; http://lattes.cnpq.br/3984004103615974; http://lattes.cnpq.br/5063398024530288; http://lattes.cnpq.br/0769561671220471Sea turtle populations are declining worldwide and human activities are being considered as important factors in decreasing this group. Fisheries carried out directly on foraging sites of the species Lepidochelys olivácea generate high mortality rates for this species. Sea turtle strandings have been a very important tool for studies regarding the negative impacts that occur in the coastal zone. Taking into account the importance of assessing the impacts caused on sea turtle populations, the objective of the present study is to estimate the age for the species Lepidochelys olivacea found on the coast of municipality of Ipojuca - PE, using the skeletochronology technique. 14 individuals were used to carry out the analysis, using transversal cuts of the humerus close to Crista Deltapeitoral and thus testing the method of manual wear to obtain the materials for reading the growth lines. The estimated age of the individuals analyzed was 9 to 17 years. It was observed in a strong correlation between the curvilinear Carapace Length - CCC and the number of growth lines (r = 0.91; P <0.0001). However, the correlation between the CCC and the longitudinal length - CL did not obtain a good correlation (r = 0.7; P <0.0001).