Indoor Overwintering of Silver Pomfret (Pampus argenteus Euphrasen) Fingerlings in Fiberglass Tanks

摘要

Indoor rearing of silver pomfret (Pampus argenteus Euphrasen) fingerlings cultured under three temperature legimes during winter months in Kuwait was evaluated for growth and survival in fiberglass tanks. Thirty fish with mean weights of approximately10 g were stocked in each fiberglass tank (water volume = 500 L). Three tanks were assigned to each of the three sea water temperature regimes: ambient 25°C and 30°C. Under controlled water temperature regimes, heat exchangers were installed and set to the desired water temperature of 25°C and 30°C. Water flowed through each tank at the late of two L/min. The fish were fed at satiation rate five times a day at two hours interval starting at 0800 h six days a week with turbot pellet (Ecostart 15 byBiomar of France). The experiment was conducted for 154 days. Growth rates of fish under controlled temperature regimes were significantly higher than those under ambient temperature regime (P<0.01). However, growth rates between the controlled temperature regimes did not differ significantly (P>0.05). Survival late of fish was highest at 25°C (66.7%) followed by fish at 30°C (62.2 %) and the lowest was those at ambient temperature regime (40.0%). Survival rates of fish reared at water temperatures of25°C and at 30°C did not differ significantly (P>0.05) but were significantly higher than those reared at ambient tempoature regime (40.0%). Based on the results of this study it is apparent that silver pomfiet should be cultured in sea water with temperature close to 25°C during winter in Kuwait to obtain better growth and survival.