TitleStocking densities of nile tilapia in shrimp ponds under different feeding strategies
Publication TypeConference Paper
Year of Publication2004
AuthorsYi, Y, Fitzsimmons, K, Saelee, W, Clayden, P
EditorFitzsimmons, K, Mair, G, Bolivar, RB
Conference Name6th International Symposium on Tilapia Aquaculture
Date Published2004
Conference LocationManila, Philippines
Abstract

This study, consisting of two experiments, was carried out at the Asian Institute of Technology (AIT), Thailand, to investigate the growth performance of shrimp (Penaeus monodon) and Nile tilapia (Oreochromis niloticus), water quality and nutrient budget in different stocking combinations of tilapia-shrimp polyculture. Both experiments were conducted in nine 200-m2 earthen ponds with three treatments in triplicate each, namely: a) shrimp alone at 30/m2 (monoculture); b) shrimp at 30/m2 and Nile tilapia at 0.25/m2 (low- density polyculture); c) shrimp at 30/m2 and Nile tilapia at 0.50/m2 (high-density polyculture). In experiment 1, the feed ration was determined daily by feeding-tray method in every pond during the 65-day culture period, while the fixed feed ration for all ponds was determined by a feeding table and estimated mean survival rate in experiment 2 during 75-day culture period. In experiment 1 with varied feed rations, the growth, yield and survival of shrimps were not significantly different among all treatments (P > 0.05). Although the Feed Conversion Ratios (FCR) of shrimps, which ranged from 1.62 - 2.24, were not significantly different among all treatments (P > 0.05), shrimp monoculture had significantly lower feed input than tilapia-shrimp polyculture (P < 0.05). However, in experiment 2 with fixed feed rations, the low-density tilapia polyculture resulted in significantly higher shrimp yield than the monoculture and high-density tilapia polyculture (P < 0.05). FCR in the low-density tilapia polyculture treatment (1.44) was significantly better than those in both monoculture and high-density tilapia polyculture, (1.73 and 1.69, respectively) (P < 0.05). In both experiments, Nile tilapia showed fast growth (3.98-4.70 g/fish/day). There was no significant difference in growth and survival of Nile tilapia between the low- and high-density tilapia polyculture (P > 0.05), while fish yields were significantly higher in the high-density tilapia polyculture than those in the low-density tilapia polyculture (P < 0.05).
URLhttp://www.was.org/Shopping/ista--6th-international-symposium-on-tilapia-in-aquaculture-proceedings
Notice of Publication Number

NOP 04-A20 (English)