Growth performances for monoculture and polyculture of hatchery‐reared juvenile spotted babylon,Babylonia areolata Link, 1807, in large‐scale earthen ponds |
| |
| Authors: | Sirusa Kritsanapuntu Nilnaj Chaitanawisuti Wannanee Santhaweesuk Yutaka Natsukari |
| |
| Institution: | 1. Faculty of Technology and Management, Prince of Songkla University, Suratani, Thailand;2. Aquatic Resources Research Institute, Chulalongkorn University, Bangkok, Thailand;3. Faculty of Fisheries, Nagasaki University, 1‐14 Bunkyo‐Machi, Nagasaki, Japan |
| |
| Abstract: | This study was conducted to determine the feasibility of growing out hatchery‐reared spotted babylon juvenile (Babylonia areolata) in earthen ponds. The growth, survival and water quality for monoculture of spotted babylon were compared with the two polyculture trials with sea bass (Lates calcarifer) or milkfish (Chanos chanos). This study provided good results for growth and survival of spotted babylon in earthen ponds. The mean body weight gain of snails held in the monoculture was 5.39±0.08 g, and 4.07±0.16 and 4.25±0.11 g for those held in the polyculture with sea bass or milkfish respectively. Food conversion ratios (FCR) were 2.69, 2.96 and 2.71 for snails held in the monoculture and polyculture with sea bass and milkfish, respectively, and the final survival rates were 84.94%, 74.30% and 81.20% respectively. There were no significant differences in each parameter of water quality among the treatments but significant differences among the culture period were present (P<0.05). Salinity and total alkalinity showed the greatest changes during the culture period for all treatments. Seawater temperature, pH, dissolved oxygen, nitrite–nitrogen and ammonia–nitrogen gradually changed over the culture period for all the treatments. The present study indicated the technical feasibility for monoculture and polyculture of B. areolata to marketable sizes in earthen ponds. |
| |
| Keywords: | Babylonia areolata Lates calcarifer Chanos chanos earthen ponds monoculture polyculture growth survival |
|
|
