01. Universidade Federal Rural de Pernambuco - UFRPE (Sede)
URI permanente desta comunidadehttps://arandu.ufrpe.br/handle/123456789/1
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Resultados da Pesquisa
Item Uso de tampas plásticas como mídia filtrante alternativa em Aquacultura: primeiro protótipo de filtro(2024-10-01) Maranhão, Alberia Jacqueline Alves; Porto Neto, Fernando de Figueiredo; http://lattes.cnpq.br/1475750525654086; http://lattes.cnpq.br/0852093549676817Water use increases as aquaculture grows. The quality and quantity of water is essential for aquaculture, mainly fish farming and indoor shrimp farming (freshwater). Another requirement is the aspect of treated effluents in discharges into the environment. Therefore, the present work aims to test and design a sustainable filter model, using plastic covers as filter media. 10-liter water bottles (PET) were used, perforated on their sides, with around 200 PET bottle caps as filtering media, thus simulating a biological and mechanical filter. Aquarium pumps were introduced inside the bottles, creating a circulation of bubbles where the water is pushed upwards, and water to be filtered enters the bottle in a dynamic water circulation system. Bacteria that settle in the filter will reduce organic matter (nitrogenous nutrients), and the shape of each cap reduces the velocity of particulate matter within the filter, reducing turbidity, and concentrating this particulate organic matter, and other debris, within the filter. filter. This makes filters lighter and cheaper, replacing traditional media (such as those made with ceramic), and reducing the disposal of plastic lids in the environment, reusing this type of material. The experiment was conducted in three 20-liter tanks, supplied with water from fish farming effluents from the Continental Johei Koike Fish Farming Station, at UFFRPE. Physical and chemical data were evaluated every 3 days. The results indicate that there was stabilization of pH, where the water initially had a pH of 6 (on average), to 7. There was an improvement in transparency, and an improvement in the degradation of total ammonia and nitrite, key factors in water quality, aiming to improve the management conditions and productivity in aquaculture.Item Caracterização dos parâmetros físico-químicos no Arquipélago de Fernando de Noronha como indicador de qualidade de água(2022-05-27) Silva, João Victor Sulino da; Oliveira, Paulo Guilherme Vasconcelos de; Garcia, Gabriel Santos; http://lattes.cnpq.br/9212363423333565; http://lattes.cnpq.br/5700488412022830; http://lattes.cnpq.br/2859159241817877The Fernando de Noronha Archipelago is located in the equatorial South Atlantic and its climate is defined by two well-defined seasons (dry season and rainy season) with hydronidamic variations according to its position to the east or west. A part facing the African coast to the east (“Mar de Fora”) and another part facing the Brazilian coast to the west (Mar de Dentro). The increase in tourist demand in Fernando de Noronha has caused impacts over the years, such as the treatment inadequate effluent and waste dumping at sea. Faced with the need to analyze the different water masses and improve the understanding of the effects of seasonality and effluents on the physicalchemical parameters of seawater this work aimed to analyze and describe the seasonal variation of some physicochemical parameter from seawater from Fernando de Noronha Archipelago and verify that the parameters are in accordance with the Legislation. The samples were collected in places considering the predictors: Season of the year; “Mar de Dentro and Mar de Fora” (position facing West and east to the island respectively); Effluents and Circulation. It was found that all predictors were able to explain the response variables in a significant way, with the season of the year having the strongest effect on the data, followed by the presence of emissaries. The parameters proved to be inappropriate in the places with effluents when compared to the values stipulated in the Brazilian legislation. Based on what was seen in this study, we can identify the need to analyze more frequently Fernando de Noronha Archipelago, maintaining a monitoring of physicochemical and microbiological parameters in order to subsidize conservation actions of aquatic organisms and the well-being of the population that uses the beaches. It is also important to monitor the quality of the outfalls that reach the sea, maintaining a monitoring routine. As well as studying the interactions of parameters with marine life, considering that the island is surrounded by natural pools of great importance for the maintenance of marine life.Item Cultivo multitrófico do camarão marinho (Litopenaeus vannamei) em sistema bioflocos com macroalga (Gracilaria domingensis) e duas dietas comercias(2019-07-04) Oliveira, Deyvid Willame Silva; Olivera Gálvez, Alfredo; Santos, Elizabeth Pereira dos; http://lattes.cnpq.br/5362345525199085; http://lattes.cnpq.br/7002327312102794; http://lattes.cnpq.br/4224003240625541Item Efeito da densidade de adição da Microalga Navicula sp. sobre a concentração de sólidos sedimentáveis, sólidos suspensos totais e voláteis no cultivo de pós-larvas do Litopenaeus vannamei em sistemas de bioflocos(2019-07-10) Oliveira, Marina Cunha Alves de; Silva, Luis Otávio Brito da; Lima, Priscilla Celes Maciel de; http://lattes.cnpq.br/4371586486794716; http://lattes.cnpq.br/4307980515769174; http://lattes.cnpq.br/5510349176705300Item Efeito da densidade de adição de Brachionus plicatilis na qualidade de água do berçário do Litopenaeus vannamei em sistema de bioflocos(2019-07-18) Pedrosa, Ícaro Freitas; Silva, Luis Otávio Brito da; Silva, Danielle Alves da; http://lattes.cnpq.br/4307980515769174Item Fungos em água envasada em garrafões de 20 litros comercializadana região metropolitana de Recife-PE(2019) Nascimento, Irani Pinto do; Pires, Edleide Maria Freitas; http://lattes.cnpq.br/0468713660747009The quality of the water for consume is animportant factor for the health and life quality of the consumers.The Brazilian Health Minister (MS) guarantees the harmlessness of the water consumed by the Brazilians over the establishment of rules and standards based of the presence of toxic compounds and bacteria. The search for natural mineral water is great all over the world and many are the reasons that lead the consumers to acquire this product, among them the purity characteristics contribute for this rise. Although, studies show cases of contaminations by fungus in bottled mineral water, being found even in high counting, even in anoligotrophic environment. This can constitute health risk for the consumers, mainly by immunocompromised individuals. The Brazilian legislation does not include fungus in the microbiological analysis for potable water. This work shows the presence of fungus in bottled water of 20 liters, comercialized in the great are of the city of Recife (RMR).There were randomly selected fifty 20 L bottles of tendifferent brands. From each brand there were analysed 5 samples of different lots, accordingly methodology of plate counting established in the Standard Methods for the Examination of Water and Wastewater. Contaminants fungus were found in every brand in different concentrations, with the 10 brands here identified from A to J, 8 showed contamination by filamentous fungus and yeast (A, C, D, E, F, G, H, J) and a difference in the contaminant quantity.The B and I samples showed low contamination by filamentous fungus and did not showed the presence of yeast.The pH of the analysed samples variedfrom 4.1 and 5.4. The results of this research allowed to conclude that the bottled water in 20Lbottles comercialized in the RMR can be contaminated by fungus; that there is great variation in the contaminations by this kind of microorganisms and that the pH of the different brands analysed, between 4,1 and 5,4, can contribute to the presence and/or development of the contaminants fungus. It is expected that with these records, contribute for the inclusion of fungus in the potability parameters for the human consume. Because the confrontation of these information with from others researchers, shows that this kinds of water can be animportant path to the dissemination of fungus and diseases transmissions.Item Crescimento de alevinos de Oreochromis niloticus em sistema de bioflocos e submetidos a diferentes níveis protéicos(2019-02-05) Ribeiro, Pedro Vinicius de Oliveira; Silva, Suzianny Maria Bezerra Cabral da; Correia, Eudes de Souza; http://lattes.cnpq.br/1573696341397169; http://lattes.cnpq.br/8569566022920336; http://lattes.cnpq.br/7296152139446076Among the several ways of intensive production in aquaculture that have been highlighted through good results with limited water use and allowing higher densities in culture is the biofloc technology (BFT). This work evaluates the performance of the intensive cultivation of Nile tilapia - Oreochromis niloticus - with bioflocosis technology in the raising phase, with a mean weight of 2.9 ± 0.09 g, using different levels of crude protein (CP) (commercial). The experimental design was completely randomized, involving four levels of protein (28, 32, 36 and 45% of CP), with four replicates each. The work lasted 63 days, and was carried out in boxes of 40L of useful volume, with 10 fish in each box (250 alevinos / m³). We evaluated, Weight Gain, Daily Weight Gain, Specific Growth Rate, Survival, Biomass Gain, Food Conversion Factor and Productivity. Among the water quality variables, the temperature and pH were within the comfort range of the species (27 and 32 ° C, 6 and 8.5) respectively, the dissolved oxygen had averages above 6mg / L. Nitrogen from total ammonia as well as nitrite was within the acceptable level for the cultivation of the species (18.6 mgL -1 and 2.12 N-NO2). The performance variables were not affected by the different levels of dietary protein (P> 0.05). The final weight was about 35g for the treatments and survival was higher than 75% for all treatments, while the productivity ranged from 6.62 to 10.08kg / m³. The study showed that crude protein levels of the feed can be reduced up to the level of 28% of crude protein in the diet in the intensive cultivation of Nile tilapia fingerlings - Oreochromis niloticus - using the biofloc system, without compromising the weight final weight gain, daily weight gain, specific growth rate, food talk factor, survival and productivity.