Engenharia de Pesca (Sede)
URI permanente desta comunidadehttps://arandu.ufrpe.br/handle/123456789/16
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Resultados da Pesquisa
Item Histologia intestinal de tilápia do Nilo Oreochromis niloticus submetidas a diferentes níveis de suplementação do extrato hidroalcoólico de Anacaridium occidentale na dieta(2024-10-10) Silva, Klarissa Albuquerque Larocerie da; Silva, Suzianny Maria Bezerra Cabral da; http://lattes.cnpq.br/8569566022920336; http://lattes.cnpq.br/3138623022102113This study evaluated the effect of supplementation with the hydroalcoholic extract of Anacardium occidentale bark on the intestinal morphology of Nile tilapia (Oreochromis niloticus) fingerlings. After a 15-day acclimation period, during which the fish were maintained in 250-liter tanks, they were transferred to 40-liter experimental units at a density of 250 fish/m³ each. The hydroalcoholic extract of Anacardium occidentale bark was added to the diets administered to the animals at concentrations determined in the minimum inhibitory concentration (MIC) assays. Four treatments were evaluated: (i) commercial feed with 3% A. occidentale extract, (ii) commercial feed with 4% A. occidentale extract, (iii) commercial feed with 5% A. occidentale extract, and (iv) control group (commercial feed without extract addition), all with four replicates each. The experiment lasted 30 days, and the diets were offered three times a day (08:00, 12:00, and 16:00 hours) to apparent satiety. For histological analysis, five fish were collected at the beginning and one fish at the end of the experimental period (one per replicate for each treatment). The intestines were exposed in Petri dishes and divided into three segments: anterior, middle, and posterior. A 3 cm portion of the middle intestine was used, which was longitudinally cut to expose the villi. The total height, height, width, and thickness of the villi were measured. As a result, higher mean values for all intestinal morphology variables evaluated (height, total height, thickness, and width of the villi) were observed in the groups supplemented with 3%, 4%, and 5% of the hydroalcoholic extract of A. occidentale bark compared to the control group, with no differences among the treatments that received the extract. In conclusion, the supplemental use of the hydroalcoholic extract of Anacardium occidentale bark in the diet of Nile tilapia fingerlings resulted in a beneficial effect on the intestinal morphology of the supplemented animals, indicating improved development regarding intestinal health.Item Equiparação de atividade de Programa de Iniciação Científica (PIBIC): relatório final sobre avaliação da Tecnologia do ultrassom sobre aspectos físicos, químicos e nutricionais de filés de tilápias do Nilo (Oreochromis niloticus)(2024-06-06) Silva, Eloá Dandara Carvalho da; Oliveira Filho, Paulo Roberto Campagnoli de; http://lattes.cnpq.br/8043850276929205; http://lattes.cnpq.br/2682308411839274Item Avaliação da digestibilidade de farinha de cefalotórax de camarão (Penaeus vannamei) em dietas para tilápia (Oreochromis niloticus)(2023-09-22) Campelo, Kesya Leal; Santos, Juliana Ferreira dos; http://lattes.cnpq.br/6621907859216486; http://lattes.cnpq.br/2587814165212462In order to promote knowledge about alternative ingredients for aquatic animal feed formulations, the apparent digestibility coefficients (ADC) of protein, dry matter and crude energy of two ingredients in tilapia feed were determined. Seventy-two juvenile Nile tilapia (Oreochromis niloticus) with an average weight of 61.85±10.06 g were used in a completely randomized experimental design with three treatments, three replications and eight fish per box, alternating between the box and the hatchery. Three treatments were used: Reference feed, based on the nutritional needs of the species; Test feed consisting of the reference feed with the addition of shrimp cephalothorax meal (P. vannamei) whole with reference feed; Test feed consisting of the reference feed with the addition of shrimp cephalothorax meal (P. vannamei) with low fat content. The ADC was determined by the indirect method using 1% celite as an inert indicator. The CDA for crude protein was 94.14% and 94.22% and digestible values for crude protein were 51.96% and 56.90%; for dry matter, 92% and 91.8%; for energy, 92%; and digestible values of 80 and 89% were found. Shrimp cephalothorax waste was considered a potential substitute for protein in feed for the species.Item Perfil hematológico de Oreochromis niloticus cultivados em sistema de bioflocos e submetidos a diferentes densidades de estocagem(2019-12-04) Silva Júnior, Álvaro Cirino da; Silva, Suzianny Maria Bezerra Cabral da; http://lattes.cnpq.br/8569566022920336Item Avaliação de linguiças de tilápias do nilo (Oreochromis niloticus) submetidas a diferentes métodos de defumação(2019-07-11) Reis, Paulo Vitor Melo; Oliveira Filho, Paulo Roberto Campagnoli de; http://lattes.cnpq.br/8043850276929205Item Análise investigatória do método de reversão sexual da tilápia do nilo (Oreochromis niloticus), linhagem Chitralada, na piscicultura Mar Doce do Nordeste(2019-07-19) Silva, Joab Joaquim da; Ponzi Junior, Manlio; http://lattes.cnpq.br/1423075666160782; http://lattes.cnpq.br/6664018329829121This work was developed inside the facilities of Mar Doce do Nordeste Piscicultura e Projetos Ltda., attempting to confirm if the sexual reversion process of the Nile Tilapia (Oreochromis niloticus) fingerlings was inside what was foreseen in Pompa & Green’s reversion technique, using the masculinizing hormone 17 α-methyltestosterone, obtaining then, as detailed by the technique, monosex specimens with reversion rate above 95%. The fishes were fed with feed containing 60 mg/kg of 17 α-methyltestosterone, which was given 6 times per day, during the period of 28 days in a masonry vivarium in the first 10 days, followed by 18 days in another vivarium dug in the ground. After 120 days of cultivation, the specimen were slaughtered and eviscerated to posterior visual analysis of the gonads. The obtained results revealed reversion rates lower than what were expected with the correct application of Popma & Green’s reversion technique, appointing the protocol’s necessity of revision, in order to reach monosex specimen and improve the quality of the commercialized tilapia’s fingerlings.Item Análise genética na investigação de origem da tilápia (Oreochromis niloticus) em cultivos comerciais(2019-07-12) Silva, Gênison Carneiro; Coimbra, Maria Raquel Moura; http://lattes.cnpq.br/7669497233462075; http://lattes.cnpq.br/3679959470967021The development of genetically improved tilapia strains was an important step in world aquaculture, considering growth, reproduction, weight gain, fillet yield and greater rusticity of the selected individuals. Acquiring improved seeds is the first step to shortening production time, however, the fish farmer should provide adequate conditions and structure to achieve optimal maximum performance. In biphasic tilapiculture systems in excavated nurseries, it is common for the nursery phase to occur in a different location than the fattening phase. In this case study, one producer purchased improved fingerlings from a tilapia breeding company “A” and sent them to company “B” to conduct the nursery phase. However, when such the producer received the “B” tilapia juveniles and fattened them, they did not show the expected zootechnical performance. The objective of this study was to detect if the tilapia of "A" and "B" had the same genetic origin. Were used genetic markers such as microsatellites and mitochondrial DNA control region (D-loop). A total of 79 samples were collected, of which 40 were from “A” and 39 from “B”. The samples had their total DNA extracted and were genotyped for the UNH104, UNH106, UNH160 and UNH208 microsatellite markers. Then, the samples had the control region haplotypes identified by sequencing. The genetic diversity of microsatellites was analyzed to correctly attribute that the origin of "B" came from "A". The alignment and editing of the D-loop also revealed a haplotype network with equitable stakes of "A" and "B" confirming that the groups belonged to the GIFT lineage. The techniques used show that the different zootechnical performance should be associated with issues related to the adopted management and stocking density during the nursery phase.Item Relatório do estágio orientado supervisionado no Centro Integrado de Recursos Pesqueiros e Aquicultura de Itiúba(2018) Falcão, Ítalo Viana Barros; Silva, Luis Otávio Brito da; http://lattes.cnpq.br/3365265235618078; http://lattes.cnpq.br/5606139460283456Item Desempenho da Daphnia magna (Straus, 1820) cultivada em efluente de Tilápia do Nilo cultivada em sistema de bioflocos com diferentes relações C:N(2019) Bruzaca, David Nunes Aguiar; Olivera Gálvez, Alfredo; http://lattes.cnpq.br/7002327312102794; http://lattes.cnpq.br/8145992758069560In aquaculture, systems with minimum water exchange are an alternative to sustainable farming. Biofloc technology (BFT), which consists of the formation of microbial aggregates through the manipulation of the carbon: nitrogen ratio of the culture medium is an option in reducing the emission of effluents. However, the accumulation of nitrogen and phosphate residues over several crop cycles in this system ends up causing significant impacts with the release of effluent into the environment. Therefore, Daphnia magna, which is a microcrustacean of the cladoceran family that benefits from the organic mater present in the aquatic environment, can be used for the bioremediation of this effluent. The cultivation of this microcrustacean is traditionally carried out in a clear water system with the addition of the microalgae Chlorella vulgaris in its diet. In this way, the present work aims to evaluate the performance of D. magna cultivated in effluent waters of the BFT system in different carbohydrate: nitrogen ratios with the inoculation of C. vulgaris microalgae and fish feed supplementation. The experimentation is done with six treatments in triaplicates based on two factors, being : Ratio C: N (10: 1, 15: 1 e 20: 1) and Feed (with addition of fish feed (R) or without addition of fish feed (SR)). The variables of water quality: temperature (°C), dissolved oxygen (mg.L-1), salinity (gL-1), pH, NO2 (mg.L-1), TAN (mg.L-1), hardness and alkalinity were measured throughout the culture. The specific growth rate (TCE), doubling time (TD), maximum mean density (DMX), yield (R) and day of maximum density (DMD) were verified for the growth variables. To the variables pH, temperature, Salinity, TAN, Nitrite and Hardness there were no significant differences (p> 0.05) throughout the culture. Regarding dissolved oxygen there was a significant difference for the ration factor and for the interaction between the ration and feed factors. There was also a significant difference when the alkalinity was treated for the ration factor, the feed factor and for the interaction between them, with an average of 50.93 and 80.37. The pH, dissolved oxygen and temperature were favorable for the proper development of the cladoceran. Although there were statistical differences only for the ration factor, the DMXs were between 1001 ± 283 and 3433 ± 267 org.L-1. The days of maximum density were 12º, 14º and 18º days. The 10SR treatment provided a higher average maximum density of Daphnia magna on the 14th day of cultivation, besides showing TCE, TD and R values higher than the other treatments. However, all treatments allowed the growth of the cladoceran, proving that the use of the effluent is an alternative to the production of live food.