Studies on the Planktonic and Aquatic Insect Predator Succession in Carp Nursery Ponds Prior to Spawn Stocking

Author(s): K. Thirunavuakkarasu*, P. Damotharan, and V. Ravi

Abstract: Several inland water bodies particularly fish farms in the northern and central states of India were surveyed for studying the species compositions and distribution of predatory aquatic insect fauna detrimental to polyculture. It was observed that the depth of the water affects the aquatic insects directly or indirectly. In the present study a high quantity of rotifers and cladocerans were recorded in the nursery ponds. Results of the present study have shown that Notenecta sp., Limnometra sp. and Cybister sp were the major aquatic insect predators of the nursery ponds and as such proper control measures should be done before stocking. Proper management of nursery ponds requires adequate knowledge of the planktonic and aquatic insect predators in them. Such a knowledge would also help in fixing the time for hatchling.

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