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5.1.5. Supplementary feeding
Unit 5 - Fish seed rearing techniques
5.1.5. Supplementary feeding
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The stocked spawn immediately start feeding on microscopic zooplankton.
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The spawn feed so voraciously that within 2-3 days after stocking the density of plankton in the nursery pond becomes very low.
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It is known that a single specimen of live carp spawn (6.5-7.2 mm length) consumes 3-34 cladocerons within an hour; the actual number depends on the size of the spawn.
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After this period, both artificial and natural feed are utilized so that the growth and survival increase.
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The commonly used feed for IMC and exotic carps is a mixture of rice bran and oil cake of ground nut, coconut, mustard, etc.
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The quantity of artificial feed to be given daily depends upon the weight of the stocked spawn.
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While the former recommended feeding rates of 200, 300 and 400% of the body weight of spawn during the first 5 days, 6th - 10th day and 11th -15th day after stocking, respectively, the latter advocated 100, 200 and 300% feeding rates for the corresponding periods.
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The artificial feed is either broadcast on the surface of water or fed as a thick paste (dough) in the form of small balls.
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Nandeesha (1995) reviewed the literature on the practice of artificial feeding in Indian freshwater aquaculture.
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Although a great deal of literature is available on the nutrient requirements of sub adult and adult fish, very little information is available on the nutrient requirements fish spawn and fry.
Last modified: Tuesday, 14 June 2011, 9:14 AM