Journal of Environmental Biology

Comparative study on growth and survival of Genetically Improved Farmed Tilapia (Oreochromis nitoticus) fry reared under two different culture systems

R.V. Bhosle¹, J.S. Sampathkumar²*, Cherly Antony³, S. Aanand⁴, V. Senthilkumar⁵, C.J. Betsy⁶ and R.S.S. Lingam⁷

¹Department of Aquaculture, Fisheries College and Research Institute, Thoothukudi-628 008, India

²Directorate of Sustainable Aquaculture, Tamil Nadu Dr.J. Jayalalithaa Fisheries University, Nagapattinam-611 002, India

³Department of Aquaculture, Dr. M.G.R. Fisheries College and Research Institute, Ponneri-601 204, India

⁴Erode Bhavanisagar Center for Sustainable Aquaculture, Tamil Nadu Dr. J. Jayalalithaa Fisheries University, Erode-638 451, India

⁵Thanjavur Center for Sustainable Aquaculture, Tamil Nadu Dr. J. Jayalalithaa Fisheries University, Thanjavur-614 904, India

⁶Department of Aquaculture, Fisheries College and Research Institute,Thoothukudi-628 008, India

⁷Krishnagiri-Barur Centre for Sustainable Aquaculture, Tamil Nadu Dr. J. Jayalalithaa Fisheries University, Krishnagiri-635 201, India

*Corresponding Author Email : stephensampathkumar@tnfu.ac.in

Received: 06.04.2021                                                                                                       Revised: 10.08.2021                                                                        Accepted: 06.12.2021

Abstract

Aim: The aim of the present study was to analyze two different culture systems for their suitability in rearing the Genetically Improved Farmed Tilapia fry.

Methodology: Genetically Improved Farmed Tilapia fry (Average body weight 0.50 g) were stocked, at a rate of 1500 fry,in tank and hapa.Three cement tanks (2 m × 2 m × 1 m; 4000 l) and three nursery hapa (2 m × 2 m × 1 m) were used for this experiment following completely randomized design. Fry were fed using prepared diet (crude protein 32%) at a feeding rate of 8-10 % of their body weight for 45 days. Fortnightly, feeding rate was adjusted based on the sampling.

Results: After 45 days of rearing, tilapia fry attained a body weight of 5.44 g and 7.47±0.00 g in cement tanks and hapa based production systems, respectively. The specific growth rate significantly differed and it was higher (5.98 %/day) in hapa based system. Similarly, survival was significantly higher (92.00 %) in hapa based system. In contrast, increased feed conversion ratio was noticed in tank-based culture system (2.06) than the hapa based system (1.69). The protein efficiency ratio was significantly higher (1.97) in hapa based system. The recorded water quality parameters were within the optimal range for rearing of Genetically Improved Farmed Tilapia fry.

Interpretation: Overall, the results of this study demonstrated that rearing of Genetically Improved Farmed tilapia fry in hapa, installed in earthen pond, would lead to better growth, feed utilization and survival. This method can be disseminated to farmers for better profitability in seed production of Genetically Improved Farmed Tilapia.

Key words: Genetically improved farmedtilapia, Growth performance, Hapa, Nursery rearing, Oreochromis nitoticus

Copyright © 2022 Triveni Enterprises. All rights reserved. No part of the Journal can be reproduced in any form without prior permission. Responsibility regarding the authenticity of the data, and the acceptability of the conclusions enforced or derived, rest completely with the author(s).