Resumo

CHIPEPE, Mestre Florentina Amelia Luís; VENTO-TIELVES, Raymundo  e  ATKINSON, John. Evaluation of the Main Physical and Chemical Water Quality Parameters for Tilapia Production. Rev Cie Téc Agr [online]. 2021, vol.30, n.4  Epub 01-Dez-2021. ISSN 2071-0054.

Water is the main resource in fish production, and for success of this activity, it is necessary to have its availability in the required quantity and quality. In order to assess the water quality in nurseries for the production of tilapia Oreochromis niloticus on Tchissola II Farm in Chipipa commune in Huambo municipality, this study was carried out in the initial phase of the fish project implementation between December 2020 - February 2021. The physical (temperature and transparency) and chemical (dissolved Oxygen, Hydrogen potential and total ammonia) parameters considered the most sensitive and relevant for this type of production were evaluated. The Alfakit's water quality analysis kit ACQUAcombo for aquaculture was used to measure the foremost variables. The results obtained for the transparency with values of 40 cm, temperature 25.7ºC, dissolved Oxygen 6.75 mg/L and Hydrogen potential 7.5 denoted that the physical and chemical parameters of water quality in production ponds, found if within normal levels considered tolerable. However, it is necessary to monitor and manage more carefully ammonia, which varied remarkably, reaching levels considered critical and even lethal around 3.0 mg/L.

Palavras-chave : Fish Production; Aquaculture; Ponds; Tchissola II Farm.

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