engleski

Age and growth of sharpsnout seabream Diplodus puntazzo (Cetti, 1777) in the eastern Adriatic Sea

The age and growth parameters of Diplodus puntazzo from the eastern middle Adriatic Sea were studied. Total lengths (TL) of 630 specimens ranging from 13.3 to 46.7 cm were obtained from commercial fishery catches by "tramata" fishing (2004-2005). All specimens sampled were fully mature above 22 cm TL. The male - female ratio for all fish combined was 0.75:1.00, but the ratio changed according to length classes. The mean lengths, as well as the age frequency distributions of males and females were not significantly different. Scales showed clearly the ring pattern common to teleost fishes. The opaque ring was deposited during the summer months. The length-weight relationship showed an isometric growth (b = 3.001 ; R2 = 0.988). The parameters of the von Bertalanffy growth equation were: L∞ = 45.28 cm ; K = 0.191 per year ; t0 = -0.306 year ; R2 = 0.953. This study revealed that D. puntazzo is a relatively slow growing and long-lived species with a life span in excess of 18 years.

age; growth; Diplodus puntazzo; Adriatic Sea

Ispravak, dodatak u: Cahiers de Biologie Marine 48 (2007) (3) 313.