Rearing of Nile tilapia (Oreochromis niloticus) fry using two bio-shading materials in tank [manuscript]
Loading...
Date
2017
Authors
Mark Jayson D. Atayde
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
The study was conducted to assess two bio-shading materials (water spinach and duckweed) for fry rearing in tanks in terms of growth performance of fish and water quality. Treatments used in the study were the following: T1 (25% covered with duckweed), T2 (50% covered with duckweed), T3 (25% covered with duckweed), T2 (50% covered with duckweed), T3 (25% covered with kangkong), T4 (50% covered with kangkong) and the unshaded tank which was the Control. Results showed that the four (4) treatments which are covered with any aquatic plants were significantly lower pH in the morning compared to control. In the afternoon pH reading, Control was significantly higher than T3 and T4 but not significantly different with T1 and T2. T4 showed the highest potential in reducing pH which was significantly lower than T1 and T2 but not significantly lower than T3. In terms of weight gain, fish from the control significantly gained higher weight compared to other four treatments. Other than pH and weight gain, D.O., temperature, TAN, Total solid and survival rate were not significantly different between treatments. The study showed that tanks covered with aquatic plants can significantly reduce pH, particularly water spinach. The study also showed that tank without shading can significantly increase weight gain compared with the other shaded treatments. Based from the results the following were recommended for further studies: 1) screening of other macrophytes that have potential in maintaning good water quality; 2) use pond as experimental unit to observe actual fluctuation of water quality readings and; 3) conduct experiment during wet season. The s.