“…A number of indexes have been proposed for monitoring growth, feeding, reproduction, energy storage, and condition of fish populations. RNA-DNA ratios (RNA/DNA) have been demonstrated to be reliable indicators of growth rate of experimental and natural populations of fishes (Bulow, 1970;Nasiri, 1972;Haines, 1973;Sable, 1974;Spigarelli & Smith, 1976;Bulow et al, 1978). The liver-somatic index (LSI) has been used as an indicator of growth (Bulow & Coburn, 1976), daily food intake (Heidinger & Crawford, 1977), and energy storage (Bulow et al, 1978).…”