UTILISATION OF VEGETABLE LEAVES FOR CARP PRODUCTION

UTILISATION OF VEGETABLE LEAVES FOR CARP PRODUCTION
Journal of the Indian Fisheries Association 26, 1996, (Proc.Nat.Symp. Aquacrops), 53-61

A.K. ROY, S.P. RAI, A.K. DATTA, C.R. DAS AND J.K. GHOSH
Wastewater Aquaculture Division, Central Institute of Freshwater Aquaculture, Rahara-743 186, 24-Parganas (North), West Bengal

ABSTRACT

The results of two sets of experiments on mono-culture of grass carp (Ctenopharyngodon idella) and mixed culture of carps (grass carp 50 : catla 20 : rohu 15 : mrigal 15) fed exclusively with vegetable leaves are reported. The experiments were conducted with two replicates each in 0.02 ha ponds of Wastewater Aquaculture Division of the Central Institute of Freshwater Aquaculture, Rahara during 1991-93.

Monoculture of grass carp stocked @ 1000/ha demonstrated an average net production of 21.0 kg/ 0.02 ha/8 months (1501 kglha/yr). Mixed culture of carps stocked @ 5000 /ha recorded an average net production of 22.5 kg/0.02 ha/8 months (1903.7 kg!ha/yr). Field studies revealed that water bind weed (Ipomoea aquatica) is the most preferred feed of grass carp amongst vegetable leaves followed by amaranths (Amaranthus gangeticus and Amaranthus viridis), cauliflower (Brassica oleracia var. votrytis) and cabbage (Brassica oleracia var. capitata) leaves. Through selection of highly productive leaf vegetables and suitable crop planning on fallow fish pond dykes, round the year feeding programme of grass carp has been explored. Recycling of sewage effluent for vegetable production and utilisation of vegetable leaves for fish production is considered an ideal way of integrated resource management for low cost production.

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