The Farming of Fish |
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acid acre Africa amount animals artificial bacteria biomass blue-green algae breeding carbon dioxide cattle cent chironomid cladocera common carp crop of fish cultivation cycle dissolved oxygen drained dry period example farm fish feed feeders ferric fertile pond filamentous algae fish crop fish culture fish farmer fish farming fish production fishponds fodders food chain freshwater give grass carp green plants grey mullet grow grown growth hectare increase kg/ha Lake land large numbers larvae lime Malacca maximum standing crop mg/litre midge larvae natural nutrient salts organic matter oxidation phosphate photosynthesis phytoplankton plankton plant material plant plankton pond bottom pond soil ponds ponds with limestone potential energy production of fish production ponds pump rainbow trout rate of fish rate of production river sewage silver carp snails species of fish stocked sunlight supply surface layer temperature Tilapia Tropics unfertilized vegetation water-weed weight of fish zooplankton