EFFECT OF ENRICHED ARTEMIA ON METAMORPHOSIS AND SURVIVAL OF LARVAE OF GIANT FRESHWATER PRAWN, MACROBRACHIUM ROSENBERGII
H. Shivananda Murthy-1998
Journal of Aquaculture in the Tropics 13(3): 215-222
Abstract:
Effect of enriched Artemia (poor quality strain) on development and survival of the giant freshwater prawn, Macrobrachium rosenbergii larvae was evaluated in a closed brackish water recirculated system equipped with a biofilter. Three enrichment diets were formulated using cod liver oil (Diet 1), cod liver oil + soybean oil (Diet 2) and soybean oil alone (Diet 3) as sources of PUFAs. The Artemia nauplii were enriched with the diets for 24 hours and fed to prawn larvae at a rate of more than 15 nauplii/ml water. Metamorphosis of larvae was quicker and survival was good (83.32%) with Diet 2, consisted of both soybean oil and cod liver oil. Slow metamorphosis and poor survival (39.91%) were evident with the Diet 3. Diet 1 was intermediate between the above two diets. Combination of both n-3 and n-6 PUFAs with n-6/n-3 ratio of 2.6 was found to be optimum for the development and survival of prawn larvae.
(Department of Aquaculture, College of Fisheries, University of Agricultural Sciences, Mangalore 575002 India)