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All Journal The Journal of Experimental Life Sciences (JELS) Journal of Environmental Engineering and Sustainable Technology
Satiti, Cinca Hayyu Putri
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Biochemistry, Genetics & Molecular Biology Control & Systems Engineering Decision Sciences, Operations Research & Management Energy Environmental Science Immunology & microbiology Mechanical Engineering Medicine & Pharmacology Neuroscience

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VARIOUS SALINITY EFFECTS ON NILE TILAPIA SEEDS (OREOCHROMIS NILOTICUS) GROWTH RATE IN ARTIFICIAL SEAWATER Satiti, Cinca Hayyu Putri; Faqih, Abd. Rahem; Mahmudi, Mohammad
Journal of Environmental Engineering and Sustainable Technology Vol 12, No 1 (2025)
Publisher : Directorate of Research and Community Service (DRPM)

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Abstract

Nile tilapia (Oreochromis niloticus) is a euryhaline fish that can live in both freshwater and brackish waters. This research aims to determine the optimal salinity for the growth of Nile tilapia in an effort to revitalize abandoned ponds in the coastal areas of Java Island, Indonesia. The research was conducted at the Laboratorium Perikanan Air Tawar Sumberpasir Malang. The salinity treatments given were 0 ppt (control), 7 ppt, 14 ppt, and 21 ppt. The parameters observed include Absolute Growth, Specific Growth Rate, Feed Conversion Ratio (FCR), and water quality. The results show that the best Absolute Growth in Weight and Length occurred at the 7 ppt treatment with values of 8.82±0.40g and 2.45±0.16 cm. The best Specific Growth Rate for weight and length in the 7 ppt treatment were 97±0.07% and 67±0.08%, respectively. The best feed conversion in the 0 ppt treatment (1.28±0.49%). The water quality in this study was already optimal according to the Quality Standards for Nile Tilapia Farming in Indonesia.
Changes in Blood Glucose and Cortisol in Nile Tilapia (Oreochromis niloticus) with Different Salinities Satiti, Cinca Hayyu Putri; Faqih, Abdul Rahem; Mahmudi, Mohammad; Moehammad, Khibar Syiar
The Journal of Experimental Life Science Vol. 15 No. 3 (2025)
Publisher : Graduate School, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jels.2025.015.03.03

Abstract

Nile tilapia (Oreochromis niloticus) is a freshwater fish of high economic value that can tolerate a wide range of salinities, offering potential for the utilization of idle coastal ponds in northern Java. This study aimed to evaluate the physiological stress responses of Nile tilapia exposed to different salinity levels by measuring blood glucose levels, cortisol concentrations, and survival rates. The experiment was conducted for 28 days at the Sumberpasir Freshwater Fisheries Laboratory, Malang, using a Completely Randomized Design with four salinity treatments (0, 7, 14, and 21 ppt) in triplicate. Data on blood glucose and cortisol were analyzed using ANOVA (p < 0.05), while survival rate and water quality were analyzed descriptively. The results showed that salinity significantly affected blood glucose levels, with the highest value recorded at 21 ppt (115±39.2 mg.dL-1) and the lowest at 0 ppt (63±29.9 mg.dL-1). In contrast, cortisol levels were not significantly different among treatments, with the lowest average at 14 ppt (33.23±4.17 ng.mL-1). The highest survival rate was found at 0 and 7 ppt (100%), declining to 98% and 93% at 14 and 21 ppt, respectively. It is concluded that Nile tilapia can adapt physiologically to salinity levels of up to 21 ppt, with 14 ppt being the most stable level for stress adaptation. Further study is recommended to assess long-term growth and molecular indicators supporting the development of brackish water aquaculture.
Co-Authors Abdul Rahem Faqih Moehammad, Khibar Syiar Mohammad Mahmudi