Protótipo de Micro Estação Meteorológica para Pesquisa de Dados Atmosféricos na Região do Pantanal Matogrossense

Este projeto consiste no desenvolvimento de uma micro estação meteorológica utilizando a plataforma Arduino e seus componentes. Com base em sensores de temperatura, umidade do ar, pressão atmosférica e de qualidade do ar, a micro estação coleta dados ambientais que permitem modelar as regiões. Os dados coletados foram comparados com dados públicos do INMET. Com o uso da plataforma Arduino e os sensores foi possível realizar as medições ambientais com um bom grau de confiabilidade

INFLUÊNCIA DO FOTOPERÍODO EMERAL SOBRE CARCTERISTICAS BROMATOLÓGICAS DA CARCAÇA DE JUVENIS DE TAMBAQUI (Colossoma macropomum)

The aim of this study was to evaluate the influence of ahemeral photoperiod on the chemical composition of the carcasses of tambaqui (Colossoma macropomum). The experiment was conducted using 1 90 fish with average weight of 11.01 ± 2.08g and total lenght of 7.8± 0.18cm,stored in sixteen bowls of 56 liters of water with daily renewal of 40-times volume. The water temperarature was maintained at 29.1 ± 0.41°C and the stocking rate was equivalent to 2.75g/L. All tanks had constant aeration. Ahemeral photoperiods were maintained with the aid of timers. The following treatments were used: T1 = 6 hours of light, T2= 1 2 hours of light, T3= 1 8 hours of light and T4= 24 hours of light with four replications each. The juveniles were fed twice a day with commercial extruded feed (28% crude protein). The experiment lasted 64 days and the chemical composition of eviscerated and sheddedcarcasses were analysed at the beginning, at 32 days and at the end of it for the evaluation of crude protein, ether extract, ash and non nitrogenous extract in dry matter and in natural matter. Statistical analysis of variables was performed with the aid of SAEG application, version 9.1. For performing analysis of variance, Pearson correlationsand regressions were used. There was no effect of ahemeral photoperiods (p<0.05) in variables

Morphometrical development of tambaqui (Colossoma macropomum, Cuvier, 1818) under different photoperiods

The experiment was performed with 160 tambaqui (Colossoma macropomum) with average weight 11.01±2.08 g and total length 7.8±0.18 cm. Fishes were kept in sixteen aquariums with 56 L of water at 29.1±0.4 ºC of temperature, initial stocking density 1.97 g/L and constant aeration. The objective of this study was to assess the influence of photoperiod on fish performance. Treatments consisted of four photoperiods: T1 = 6 hours; T2 = 12 hours; T3 = 18 hours and T4 = 24 hours, with four replicates each. Fishes were fed twice a day with commercial extruded feed (28% of crude protein). The experiment was developed in closed circulation system, with volume of water renewal for each experimental unit equivalent to 40 times daily. Fish biometry was performed at the beginning of the experiment and at every 16 days, in order to follow the effects of treatments on juvenile development. Final weight, total length, standard length, height, feed intake, weight gain, feed conversion, survival, specific growth rate, protein efficiency rate and protein retention efficiency were assessed. Statistical analysis of variables was performed with application of the software SAEG version 9.1, for analysis of variance, regression analysis and Pearson correlation. Positive influence of photoperiod was observed for the studied variables in this study. The studied variables enhanced as the photoperiod increased, mainly between 15 and 22 hours. The photoperiod has significant influence upon growth traits of tambaqui (Colossoma macropomum)

Desenvolvimento de Sistema Automático de Análise de pH e Temperatura da Água para Aquicultura

A aquicultura é a produção de organismos aquáticos em cativeiro, tendo como principal atividade a piscicultura, na qual faz-se necessário o monitoramento constante dos níveis ideais de qualidade de água para redução de perdas. Neste trabalho buscou-se desenvolver um sistema de análise automática da água para aquicultura. O sistema desenvolvido utilizou a plataforma Arduino Mega e sensores de temperatura e pH. Foram realizados testes para verificar a precisão e calibração dos sensores, bem como para validar a ferramenta desenvolvida. Com base nos resultados obtidos, pode-se constatar a viabilidade do uso do sistema automatizado para análises de pH e temperatura da água de pisciculturas