Possibilities for Increasing Prognostic Value of Enzyme Assays in Rainbow Trout (Oncorhynchus mykiss Walbaum, 1792) Serum

1 University of Sylviculture, BG -1000 Sofia, Bulgaria
2 Executive Agency of Fisheries and Aquacultures, BG - 4000 Plovdiv, Bulgaria


BOYADJIEV, N. and N. ANEV, 2008. Possibilities for increasing prognostic value of enzyme assays in rainbow trout (Oncorhynchus mykiss Walbaum, 1792) serum. Bulg. J. Agric. Sci., 14: 256-261

This investigation has the purpose of determining the cellular levels of fluctuation of serum malic dehydrogenase (MDH) of healthy trout, bred in fish farms, which have been supplied by Karst and river water sources. For the purpose of enzyme assays, blood samples have been taken from 990 healthy trout fish, bred in Karst water, with different age and sex. The limits of fluctuation of malic dehydrogenase activity in healthy rainbow trout, bred in fish farms, supplied with karst and fresh water, as well as its dependence on age, sex and season, has been established. The values of enzyme assays in healthy rainbow trout may provide a basis for monitoring over the physiology of fish intensive breeding in fish farms.

Key words: rainbow trout, malic dehydrogenase (MDH), enzyme assays, blood serum

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