Recent biotechnological methods have made it possible to measure the real-time growth rate of fishes in response to changes in environmental conditions, as compared to the traditional methods. The accurate isolation and quantification from a tiny amount of tissue's DNA, RNA and protein concentration would give the physiological status of fishes in their natural environment. The DNA content of tissue/cell remains stable and provides an index of cell number, whereas RNA content changes in response to transcription-dependent protein synthesis and is directly correlated with the growth rate of fish. The RNA/DNA ratio of tissue has proven to be a reliable estimator of real-time growth and its nutritional status of fish larvae and juvenile fish and it is an indicator of the protein synthesizing potential of a cell.

Fisheries sector is developing at a faster rate and plays an important role in terms of food security as a cheap source of protein-rich food. India is 4th among fish producing countries and 2nd in inland fish production in the world (FAO, 2009). The report has reckoned India’s farmed fish output (2004) at 2.47 million tons, and the value of total reared fisheries output is assessed at $2.93 mn. The annual per capita consumption of fish in India has steadily risen from 2.9 kg prior in 1981 to 4.7 kg in 2000 (Rath et al., 2011). Vast water resources are gifted with diversified and remarkable type of Ichthyofauna and have the capability to contribute more significant to overall aquaculture production. Inland fisheries resources comprise rivers, streams, floodplains, estuaries, mangroves, upland lakes, reservoirs and ponds. Their natural habitats provide important nursery habitats during the larval and juvenile stages for a variety of fish species. Recent degradation of water quality seriously threatens the value of these habitats as well as food availability in their natural resources (Soe, 2011). In addition, physicochemical factors (temperature, altitude, water current, pH, phytoplankton, zooplankton and dissolved oxygen) have substantial effects on growth rates of fry and fingerlings (Sehgal, 1988).

Genetics & Evolution Journal, CEL-I Endonuclease, Heterozygous Mutants, Homozygous Mutants, Biological Processes, Plant Mutants, Solanum Lycopersicon, Microcentrifuge Tubes, Homozygous Plants, Plant Genes, Cross Pollination, Heteroduplex Formation.