Being aware of the health condition of the
biological material in a fish farm allows us to
establish the preventive measures required to
prevent spreading of a disease and the treatment
to be applied in case that a mass disease occurs.
That is why, to know the normal value of the
serical glycemia, the total protein and the protein
fractions in serum enables us to differentiate the
normal physiological condition of the fish
material under research from the eventual
pathological modifications having occurred due
to the defence reaction of the organism.
The level of the serical glycemia,
represents a high value marker indicator of the
stress condition, while the level of total protein in
serum is, first of all, a synthetical indicator of the
nutritional condition of the organism.
Most of the diseases have but little
influence on the concentration of the total protein
in the blood, but some influence on certain
protein fractions, and they alter the ratio between
albumins and globulins. A decrease below 0.3 in
value of the ratio albumins/globulins in serum is
significant for the health condition of fish. | 
