Striped sea bream, Lithognuthus mormyrus L., are hermaphoroditic protandrous fish. Sex ratios are given for length and age classes, indicating the males change sex mainly at lengths between 25.0 and 32.5 cm, in a e classes 4 to 7, with more than 30 % of the population changing sex in age class 6 to 7. Males were afso observed up to a length of 34.5 cm. Length-weight relationship showed no significant difference from isometric growth in winter (b=3.05) and a negative allornetric growth in summer (b = 2.69). The a e composition was established using the Bhattacharya method and additional observations of annuaf rings on scales. Six age classes were obtained from Kagtela Bay (age 3: 21.7 cm, age 4: 26.5 cm, age 5: 28.4 cm, age 6: 30.3 cm, age 7: 31.6 cm, age 8: 33.4 cm) and from Mirna Bay (age 2.5: 19.4 cm, age 3.5: 24.1 cm, age 4.5: 26.9, age 5.5: 29.4 cm, age 6.5: 31.3 cm, age 7.5: 32.8 cm). Von Bertalanffy's growth equation was fitted to these mean length-at-age data resulting in parameter values of L, = 36.2 cm, K = 0.297, to = -0.08 for Kagtela Bay and L, = 37.3 cm, K = 0.262, to = -0.39 for Mirna Bay.
Age, growth and mortality of picarel Spicara smaris L. collected in the eastern middle Adriatic during April and May in 1999 were studied. The total lengths of individuals ranged from 6.3 to 19.8 cm, and the weight from 2.2 to 78.3 g. The slopes (b values) of the total length–weight regressions indicated negative allometric growth for females (b=2.8± 0.03) and isometric growth for males (b=3.08±0.04). The oldest female and male were 4 and 6 years, respectively. The von Bertalanffy growth parameters for the sexes combined were (L∞=22.76 cm, K=0.277, t0=−0.793). The overall sex ratio was 1 : 4.1 in favour of females. Individuals larger than 17.9 cm were all males.
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