Engenharia de Pesca (Sede)
URI permanente desta comunidadehttps://arandu.ufrpe.br/handle/123456789/16
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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 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.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/4307980515769174