BIOCHEMICAL ANALYSIS OF VARIOUS TISSUES IN Tachysurus sona FROM KUDUVAIYR ESTUARY AT NAGAPATTINUM DISTRICT IN SOUTH EAST COAST OF TAMIL NADU, INDIA

The ocean is tremendously diverse and species-rich. It is the home of countless organisms living in very different ecosystems. Fish are a key component of marine biotic communities. Fish is highly nutritious, tasty and easily digestive. It is much sought after by a broad cross-section of the world’s population particularly in developing countries. Monitoring the quality of fish is essential for marine ecosystem. Measurement of biochemical parameters is a commonly used diagnostic tool in aquatic toxicology and biomonitoring (López-Barea and Pueyo, 1998). The impact of a number of contaminants on aquatic ecosystems can be assessed by the measurement of their external levels in the surrounding water or sediments, or by determining some biochemical parameters in fish and other organisms that respond specially to the degree and type of contamination (Machala et al., 2001). Information on the gross chemical composition of marine organisms contributes remarkably to our understanding of the species. Analyses of substances such as proteins, lipids and carbohydrateshave great importance, since they are major constituents of living matter (Barbarino and Lourenço, 2009; Diniz et al., 2012). Carbohydrates ABSTRACT