<b>Association between nocturnal and diurnal aeration in Nile tilapia rearing tanks

Abstract

ABSTRACT. The present study has assessed the benefits of the association between nocturnal and diurnal aeration of water on Nile tilapia's culture tanks' water and soil quality, as well as to fish growth performance. There were control tanks without mechanical aeration. In the nocturnal tanks, the aeration was provided daily from 2200 up to 0600. The diurnal tanks were provided with aeration daily from 1000 up to 1800. In the nocturnal and diurnal tanks, the culture water was aerated from 1000 up to 0600. The concentration of NH 3 was significantly lower in the diurnal aerated, and nocturnal + diurnal aerated tanks when compared to the non-aerated tanks. The best water quality management to attain simultaneously high DO 2 and low NH 3 concentration was the nocturnal + diurnal aeration of water. The nocturnal + diurnal aeration of water has not shown any clear advantage on fish growth performance after 10 weeks when compared to the nocturnal aeration of water. It was concluded that the nocturnal + diurnal aeration of water is a water quality management superior to the nocturnal aeration because it achieves a better water quality Keywords: aquaculture, Oreochromis niloticus, water quality.Associação entre aeração noturna e diurna em tanques de cultivo de tilápia do Nilo RESUMO. O presente trabalho teve por objetivo determinar os benefícios da associação entre a aeração noturnal e diurna da água de tanques de cultivo da tilápia do Nilo, em relação à qualidade de água, do solo e do desempenho zootécnico. Havia tanques sem aeração; tanques noturnos, com aeração fornecida diariamente das 22 às 06h; tanques diurnos, com aeração fornecida diariamente das 10 às 18h; e tanques noturnos + diurnos, com aeração fornecida das 10 às 06h do dia seguinte. As concentrações de NH 3 da água de cultivo foram significativamente menores nos tanques diurnos e noturnos + diurnos, quando comparados aos tanques sem aeração. Nos tanques com aeração noturna e diurna se obteve, simultaneamente, elevadas concentrações de O 2 dissolvido na água e baixas concentrações de NH 3 . Embora a aeração noturna e diurna da água não tenha apresentado claras vantagens para o desempenho zootécnico após dez semanas de cultivo, concluiu-se que a associação da aeração noturna com a diurna é um manejo de qualidade de água superior à aeração apenas noturna por propiciar melhor qualidade de água.Palavras-chave: aquicultura, Oreochromis niloticus, qualidade de água.

Pertambahan Bobot Tubuh, Panjang Tubuh dan Tinggi Tubuh Ikan Nila Merah (Oreochromis niloticus) yang Dipelihara Pada Aerasi dan Padat Tebar Berbeda

“…Aerasi dapat digunakan untuk meningkatkan oksigen terlarut akibat dari menurunnya kualitas air (Zahidah et al 2018). Pemberian aerasi yang cukup akan meningkatkan pertumbuhan ikan pada perlakuan dengan tingkat stress lebih tinggi, yaitu pada media dengan kepadatan yang tinggi (Lima et al, 2018). Rendahnya oksigen terlarut dalam air akan menyebabkan menurunnya kualitas air.…”

Carcass Weight and Skeletal Muscle Microscopic Structure of Red Nile Tilapia (Oreochromis niloticus) in The Different Aeration and Filtration

“…Fish production can achieve optimal results if the physical and chemical environmental factors in the form of water temperature, pH, and dissolved oxygen (DO) meet the requirements (Bajaj, 2017). Good water quality with sufficient aeration will increase fish growth in treatments with higher levels of stress, namely in media with high density (Lima et al, 2018). Mechanical aeration will improve water quality and reduce residual feed deposits at the bottom of the pond (Tanveer et al, 2018).…”