engleski

Age and growth pattern of round sardinella, Sardinella aurita, in the eastern central Adriatic Sea

A total of 2, 033 round sardinella specimens were analysed from November 2007 to January 2009. A monthly random sampling of purse seine catches in the eastern central Adriatic Sea was used. The total length of males (N = 983) varied from 11.5 to 28.0 cm (mean ± SD = 21.8 ± 3.21 cm). It ranged from 11.0 to 32.5 cm (mean ± SD = 22.5 ± 3.67 cm) for females (N = 1021) and from 10.0 to 16.5 cm (mean ± SD = 12.6 ± 1.27 cm) for undetermined specimens (N = 29). A significant difference between the mean length of males and females was observed (t = 4.349, P < 0.001). Sex ratio was F/M = 1.04, with females slightly dominating over males. The age of round sardinella ranged from 0 to 5+ ages based on the otolith age reading method. The prevailing age in both sexes was 2+ and 3+ (79.44%). Growth parameters for all specimens were: L∞ = 34.21 cm, W∞ = 400.39 g, K = 0.362, t0 = -0.943. The length-weight relationship indicated a positive allometric growth, TW=0.0036TL3.2266.

Round sardinella; Adriatic Sea; age; growth; length-weight relationship

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