Navegando por Autor "Santos, Ivanilson de Lima"

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Efeito de diferentes densidades de estocagem no cultivo de camarão marinho Litopenaeus vannamei (BOONE, 1931) em água oligohalina em sistema de bioflocos
(2020-03-31) Santos, Ivanilson de Lima; Silva, Ugo Lima; http://lattes.cnpq.br/1858876631961029; http://lattes.cnpq.br/1174538900783101
The present study aimed at evaluating the production of marine shrimp Litopenaeus vannamei in oligohaline waters in a biofloco system under different stocking densities. The experiment was carried out in Laboratório de Experimentação com Organismos Aquáticos (LEOA/UAST) of the Federal Rural University of Pernambuco (UFRPE) for 90 days. The experimental design was completely randomized implemented with three stocking densities, 80, 160, and 320 shrimp.m-3 , with four replications. A total of 12 tanks were used, supplied with 800 L of water. The shrimp, with an initial weight of 0.038±0.001 g, were fed daily with commercial feed containing 35% of crude protein, with a frequency of 3 times a day and feeding at an initial rate of 10% of shrimp biomass and was adjusted according to consumption. Sugar was added to provide a daily maintain the 15:1 ratio (C: N). During the cultivation, the physicochemical variables of water quality such as temperature, dissolved oxygen, salinity, pH, total ammoniacal nitrogen, nitrite, nitrate, inorganic phosphate, total hardness, alkalinity, turbidity, settling solids, total suspended solids were measured. The zootechnical performance of juvenile shrimp was evaluated using the variables of final weight, feed conversion ratio, specific growth rate, final biomass, production, productivity, and survival. No statistical differences (p>0.05) were found in the means values of water quality variables (temperature, dissolved oxygen, pH, salinity) observed daily, as well as in the weekly variables (total ammonium nitrogen, nitrite, nitrate, phosphate, alkalinity, hardness, total suspended solids). However, turbidity from D320 was significantly higher than D80 and D160 (p<0.05); settled solids from D320 and D160 were higher than D80 (p<0.05). Most variables were within ideal values, except total suspended solids (265- 2645mg.L-1 ) and temperature (22-24°C). The density of 320 shrimp.m-3 recorded final biomass (205.63±100.83g.m-3 ), production (178.4±39.10shrimp.m-3 ), and productivity (258.67±126.01g.m-3 ) significantly higher than D80 and D160 (p<0,05). Although the low water temperature and high accumulation of total suspended solids, all treatments recorded survival above 50% and low feed conversion. The production of L. vannamei in well water using biofloc is a promising sustainable alternative. However, further studies should be carried out for a better understanding of this system.
Experiência vivenciada em uma fazenda de produção de camarão litopenaeus vannamei (BOONE, 1931) na empresa Camar Aquamaris, João Pessoa, PB
(2019) Santos, Ivanilson de Lima; Silva, Ugo Lima; http://lattes.cnpq.br/1858876631961029; http://lattes.cnpq.br/1174538900783101
This study aimed at describing the experience acquired in a Pacific white shrimp farming, belonging to Camar Aquamaris company of Camar Camarão Maricultura group, located in João Pessoa city in the state of Paraíba, from October 7th to November 29th, in 2019. It was possible to follow every sectors of the farm, as well as all the steps related to the production of Pacific White Shrimp, Litopenaeus vannamei, in the different stages of development, including the acquisition of post larvae, the preparation and management of nursery tanks, feed management, water quality monitoring and transfer of post-larvae to the ponds of growth. At the grow-out stage, it was possible to follow the preparation of the ponds, the stockage of post larvae, feed management, biometrics, harvesting and the marketing of the shrimps. The experience acquired during the period in the company provided the expansion of knowledge about the practices used in shrimp farming, especially in the nursery and grow-out phases of the shrimp, providing a more technical view about every phases of the shrimp production. In addition, the experience made a better personal and professional development possible.