Abstract:The study was designed to investigate the effect of low temperature preservation on the chemical and microbial profile of fish muscle (Labeo rohita) stored for a period of twenty one days. The proximate composition and microbiological analyses were carried out at 7 days interval on muscle of fish during frozen storage. It was found that the protein, lipid, moisture and ash contents decreased significantly (P < 0.05) during the entire storage period. In fresh (unfrozen) day. Thus, a significant quality loss was observed in fish during storage. However, the present frozen conditions retained the fish under acceptable microbial conditions for human consumption up to 14 th day beyond which it became unfit for human consumption.

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Fecundity of a fish can be defined as the number of eggs that are likely to be laid during one spawning period or the capacity of the fish in terms of egg production (Bagenal, 1968). It differs in different races of the same species. The measure of fecundity in fishes is a basic determinant of productivity and hence, contributes to fish culture and population dynamics. Important contributions to the study of fecundity in relation to the other parameters of body are made by Das & Koul (1965);

The physico-chemical parameters (pH, temperature, Free CO 2 , DO, CO 3-, HCO 3-, Ca ++ , Mg ++ and Cl-) were carried out for one year (April 2006 to March 2007) to evaluate the water quality of river Tawi (J&K). Four sampling stations (I to IV) were selected within the city limits of Jammu. Physicochemical parameters were within the permissible limits but showed a regular trend of increase with increase of sewage contamination, as we move from Station I to IV. Contamination of river water suggests certain control measures to protect the riverine ecosystem for health, hygiene and sustainable environment.