Polyculture Of Some Selected Freshwater Fishes Enriched With Plankton Under Different Culture Systems

Abstract

India is the world s second-largest aquaculture nation and the third-largest fish newlineproducer after China. More than 10% of the world s fish and shellfish species are newlinefound in India s rich and diverse fisheries, including deep seas, lakes, ponds and newlinerivers. Presently, India produces 8% of the world s fish. The total fish output for newlinefinancial year (FY) 2021-22 was 16.248 million metric tonnes (MMT), with newlinecontributions from the inland and marine sectors at 12.121 MMT and 4.127 MMT, newlinerespectively. India has also become top producer and 4th largest exporter (13,69,264 newlinetonnes of fish was exported and Rs.57,586.48 crore value fisheries exports) and the newlinefisheries and aquaculture production contributed around 1.1% to India s GDP and newline6.72% to the agricultural GDP with 10.34% annual growth of fish production and newline6.31 per capita consumption of fish was reported during 2021-22. In the recent past, newlineIndian fisheries has witnessed a paradigm shift from marine dominated fisheries to newlineinland fisheries, with the latter emerging as a major contributor of fish production newlinefrom 36% in the mid-1980 to 70% in the recent past. Within inland fisheries, a shift newlinefrom capture to culture-based fisheries has paved the way for sustained blue economy. newlineIn India, the state of Andhra Pradesh stands first in both coastal and inland newlineaquaculture production in the country. It is having a bountiful of fishery resources newlinewith a coastline of 974 KM spread in 9 coastal districts and continental shelf area of newline33000 Sq. KM. newlineThe present study was carried out during the year January 2018 to December newline2018, by collection of water samples in different months from the selected ponds. newlineThe parameters assessed in the laboratory using standard APHA procedures. The newlinestatistical analysis was applied to the data using SPSS 16.0 for linear relationship newlinebetween the variables, also evaluated the seasonal effect of different parameters on newlinefish production levels. newlineAn attempt was made to lime light the physico-chemical parameters, feed newlinemanagement, primary productivity and