ANALYSIS OF SOME MORPHOLOGICAL CHARACTERISTICS OF SALVELINUS FONTINALIS TROUT BREED FARMED IN SALMONID EXPLOATATIONS FROM NEAMŢ AND SUCEAVA COUNTIES

C.E. Nistor, I.B. Pagu, Cristina Simeanu, B. Păsărin

Abstract
Analysis of some morphological characters of fish by means of biometry is a frequently used method and consists in determining the variability of characters in isolated individuals or groups of individuals, by direct measurement, weighting and statistical processing of obtained data. Effectuation of body measurements and weighting is used to determine the increase in length of fish and to evaluate the general physiological condition. Brook trout, Salvelinus fontinalis, is the object of the current study by analyzing of 40 individuals of third summer, 20 individuals in each batch (L₁ and L₂), from two trout farms in Neamt and Suceava Counties. After processing the obtained data were calculated the most representative indexes and maintenance coefficients. The obtained values were between 3.46 at L₁ batch and 3.77 at L₂ batch for profile index; 1.80 at L₁ batch and 1.74 at L₂ batch for Fulton coefficient; 1.45 at L₁ batch and 1.49 at L₂ batch for Kiselev index; 38.43 L₁ batch and 41.39 at L₂ batch for thickness index; 22.57 L₁ batch and 21.43 at L₂ batch for fleshy index I, and 20.27 L₁ batch and 19.52 at L₂ batch for fleshy index II. The main values of the calculated indexes, reflects a corresponding growth, a better use of nutrition, correlated with a good maintenance and health of the analysed fishes.

Key words: morphological characters, brook trout, body indices, maintenance coefficients