Size-weight and biochemical characteristics of somatic growth of young Black Sea bivalvia mollusks Anadara kagoshimensis and Flexopecten glaber ponticus
The results of studies of morpho-physiological and biochemical parameters of somatic growth of the Black Sea species of bivalve mollusks - scallops Anadara kagoshimensis (Tokunaga, 1906) and Flexopecten glaber ponticus (Bucguoy, Dautzenberg et Dollfus, 1889), living in coastal biocenoses of Sevastopol are presented. Comparative assessment of the features of protein biosynthesis (instantaneous growth rate) of soft tissues is given on the example of juvenile population groups with linear dimensions of 25-32 mm. The values of total RNA content and RNA/DNA index prove that Anadara kagoshimensis has 2,2 times higher level of synthesis of protein structures of tissues than F. glaber ponticus. Comparative analysis of morpho-physiological parameters (relative indexes of shell mass (SM), soft tissue (ST) and interstitial fluid (IF) of the total mass of the mollusk)) of juveniles of both species shows that they have practically no differences and their indexes are within the statistical error range. The correlation dependences of the weight and linear parameters are calculated. Direct correlations between parameters with high coefficients (r=0,74 and r=0,85) are obtained for both mollusk species, which might indicate a positive allometry growth.