Short Communication: Evaluation of water quality and survival rate of red tilapia (Oreochromis niloticus) by using rice-fish culture system in quarry land of clay

Abstract

Abstract. Hidayati D, Nurtjahyani SD, Oktafitria D, Ashuri NM, Kurniallah W. 2019. Short Communication: Evaluation of water quality and survival rate of red tilapia (Oreochromis niloticus) by using rice-fish culture system in quarry land of clay. Biodiversitas 20: 589-594. Quarry land is an area that has been used as mining land and has different characteristics from the former conditions before being mined so that the level of productivity of the soil decreases. This study aims to determine the suitability of clay quarry land in Tuban as a cultivation medium based on the analysis of the water quality and survival rate of red tilapia (Oreochromis niloticus) using rice-fish culture system. This study used a completely randomized experimental design method with triplicate of three ratio of cultivation medium using Ex-mining Land Soil (EmLS) from quarry land and Top Soil, i.e., 1:0 (A), 1:1 (B), and 0:1 (C/Control). Results of water quality measurements that include nitrite, nitrate, temperature, pH, and dissolved oxygen in descriptive unreal influence showed good condition. However, ammonia gives a significantly different effect mainly on the survival rate in 30 days nurture. In the end, the ANOVA test result of tilapia survival in treatment A was not significantly different (P>0.05) with treatment B and control. Based on these data, it can be seen that the EmLS from the quarry land of clay and TS can be used as a medium for cultivation of red tilapia (O. niloticus) with the recommended ratio of 1:1.

Coculture of aquatic animals and paddy in brackish water: Evaluation of the growth of daily growth and morphometrics of tilapia (Oreochromis niloticus) as a fed species

“…Sisa pakan, feses, dan produk metabolisme adalah sumber nitrogen anorganik dalam bentuk amonia, amonium, nitrit, dan nitrat. Konsentrasi oksigen yang rendah menyebabkan nitrogen bergerak menuju senyawa amoniak, sedangkan konsentrasi oksigen tinggi menyebabkan nitrogen bergerak menuju senyawa amonium (Hidayati et al, 2019). Suhu selama penelitian yang tercatat pada setiap perlakuan berada pada rentang 24-32C yang aman dan mendukung kehidupan ikan nila (Lucas et al, 2018).…”

“…Amonia bebas yang tidak terionisasi dalam bentuk amoniak (NH3) beracun bagi organisme akuatik dan amoniak pada konsentrasi yang tinggi dapat menjadi indikasi adanya pencemaran bahan organik pada sebuah perairan (Hidayati et al, 2019). Konsentrasi amoniak pada setiap sistem budidaya, baik monokultur, polikultur, IMTA-non padi, maupun IMTA-padi selama penelitian dibawah 1 mg/L yang aman untuk kehidupan dan pertumbuhan ikan (Lawson, 1995).…”

Aspek Teknis Budidaya dan Profitabilitas Pembesaran Ikan Nila (Oreochromis niloticus) di Fish Factory Iwa-ke Oishi, Bogor, Jawa Barat

“…Konsentrasi nitrat (NO 3 -N) dan nitrit (NO 2 -N) rendah yaitu 1,5 dan 0 mg/L, dan tergolong aman bagi pertumbuhan ikan nila. Nitrit dan nitrat merupakan produk aktivitas nitrifikasi yang dilakukan oleh bakteri pada air pemeliharaan ikan (da Silva Cacho et al 2020, Hidayati et al 2019. Ammonia yang diekskresikan oleh ikan akan diubah menjadi nitrit oleh bakteri AOB (ammonia oxidizing bacteria), yang kemudian akan diubah menjadi nitrat oleh bakteri NOB (nitrite oxidizing bacteria) (Fan et al 2022, Preena et al 2021.…”