TCC - Bacharelado em Engenharia de Pesca (UAST)
URI permanente para esta coleçãohttps://arandu.ufrpe.br/handle/123456789/2938
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Item Berçário de camarão Litopenaeus vannamei(BONNE, 1931) cultivado em água oligohalina com tecnologia de biofloco sob diferentes densidades de estocagem(2018) Silva, Weverson Ailton da; Silva, Ugo Lima; http://lattes.cnpq.br/1858876631961029; http://lattes.cnpq.br/8320689687057292The present work evaluated the culture of the marine shrimp Litopenaeus vannameiin the nursery stage submitted to different storage densities in a biofloco system. The cultivation of post-larvae of L. vannameimarine shrimp in biofloc technology was carried out at the Laboratory of Experimentation of Aquatic Organisms of the Federal Rural University of Pernambuco (UFRPE), during the 28-day period. A completely randomized design with three treatments was adopted: D2: 2 shrimps. L-1, D4: 4 shrimps. L-1and D6: 6 shrimps. L-1, with four replicates. Twelve tanks with a useful volume of 15 L of water were used. As post-larvae with initial weight 0.005 ± 0.001 g were fed commercial feed containing 40% crude protein, with a frequency of 3 times a day and feed rate of 10% of the biomass. Fertilizations were done with the daily use of the maintenance schedule of 15: 1 (C: N). During the cultivation were monitored as having success and were identified the types of light and temperature (ºC), dissolved oxygen (mg L-1), conductivity (μS Cm-1), salinity (g L-1), pH, total dissolved solids, total ammoniacal nitrogen (N-NAT), nitrite (N-NO2), nitrate (N-NO3), inorganic phosphate (P-PO4), sedimentable solids (SS) and alkalinity. The performance of the post-larvae was obtained through the comparison of final weight (mg), survival (%), food replacement factor (FCA), condition index, TCE (% -1) and weekly growth (mg). Differences were found not to be a factorof feed conversion and of post-larvae production. Despite the final weight values, survival and weekly evolution differed significantly between treatments (P> 0.05). The results of the results, with respect to one crop were reached when cultivated in the post-larvae of 4 post-larvae L-1, as it was in many treatments (P <0.05). Biofloc technology is a good alternative for the shrimp nursery, bringing high productivity and greater sustainability, especially in semi-arid regions with little availability of water. The adoption of storage densities from 2000 to 6,000 PL. m-3of L. vannameidid not significantly influence the physical chemical variables of water quality.Item Efeito de densidades de estocagem na disponibilidade de alimento natural em berçário de camarão Litopenaeus vannamei (Boone, 1931) cultivado com tecnologia de biofloco(2018) Santos, Jorge Luiz da Silva; Silva, Ugo Lima; http://lattes.cnpq.br/1858876631961029; http://lattes.cnpq.br/3650685131155739The objective of this work was to determine the main components of planktonic food in the nursery of shrimp L. vannameiwith biofloc technology. The experiment was carried out for 28 days and a randomized design with three post-larval storage densities, D2: 2 PLs. L-1, D4: 4 PLs. L-1and D6: 6 PLs.L-1, with four replicates each, using molasses as carbon source, in the C: N ratio of 15: 1. Samples were collected weekly, with 2 liters of water in each tank, which were filtered with plankton net and concentrated in 250 mL. The qualitative and quantitative study of plankton with 1 mL sub-samples for zooplankton was carried out in the Sedgwick-Rafter chamber (ind.L-1). The phytoplankton was evaluated in slides and coverslips (nº cells.mL-1) analyzing 0,1 mL, bothunder light microscope. The temperature values remained close to 22 ° C, below the ideal temperature for L. vannameicultivation, since the appropriate range for this species is between 26 to 33ºC, but the dissolved oxygen was in the ideal conditions for its culture, which should be above 4.0 mg.L-1and during the experiment remained above 8 mg.L-1. The development of shrimp did not show any difference between the treatments, for the final weight variable, since the survival, the D2treatment obtained the highest survival (> 72%) and the production in D6was higher than in the other treatments (2.98 Pls.L-1). The zooplankton community in the nursery tanks was represented by 23 genera, distributed among the groups Rotifera, Protozoa, Nematoda, Platelmintos and Cladocera. The Protozoa group presented the most diversification, regardless of the treatment, and also presented the highest abundance (> 66%). The main genera of Protozoa were Aspidisca, Euplotesand Trinema, and the phytoplankton community was composed of 16 genera, distributed in the classes Chlorophyceae, Bacillariophyta, Cyanophyceaeand Dinophyceae, the dominant class was Bacillariophyta(> 41%), with the genera Naviculaand Cyclotella. The density of 4 PL.L-1gave the highest density of zooplankton, but for the phytoplankton the density of 6 PLs.L-1was the one with the highest amount.