The study analyzes comparatively some
bodily indices and coefficients (profile index, Kiselev
index, index of fleshy and the Fulton coefficients) in
Aristichthys nobilis (bighead carp) and
Hypophthalmichthys molitrix (silver carp), from the
first up to the fourth growth summer. The main
objective of the investigation referred to the
evaluation of the health condition of the piscicultural
populations under analysis, evidenced by the most
representative bodily indices and coefficients
expressing the fish-breading maintenance, followed
by the statistical processing of the results obtained.
Thus, for each parameter in part, there were
calculated mean error and standard deviation,
median, mode, sample variance, range, mean
confidence level (95%), as well as mean variation
and precision coefficient.
The analysis performed evidenced a
harmonious development of the investigated
populations, which showed good maintenance
condition, in close correlation with the main physicochemical parameters of the growing media: water
temperature, amount of oxygen dissolved in the
water and water pH.
On the basis of the values of the investigated
parameters, we may conclude that individuals of
Aristichthys nobilis species evidence the most
pronounced corpulence, comparatively with the ones
of Hypophthalmichthys molitrix in the first two
stages of development and, at the same time, the best
physiological condition starting with the second
summer of growth up to the last stage of
development under investigation. |