Scientia Marina, Vol 69, No 2 (2005)

Age and growth of round sardinella (Sardinella aurita) in the northeastern Mediterranean


https://doi.org/10.3989/scimar.2005.69n2231

Athanassios C. Tsikliras
Aristotle University of Thessaloniki, School of Biology, Department of Zoology, Laboratory of Ichthyology - Fisheries Research Institute, Greece

Emmanuil T. Koutrakis
Fisheries Research Institute, Greece

Konstantinos I. Stergiou
Aristotle University of Thessaloniki, School of Biology, Department of Zoology, Laboratory of Ichthyology, Greece

Abstract


The round sardinella, Sardinella aurita Valenciennes, 1847, was sampled monthly from commercial purse-seine vessels in Kavala Gulf (northern Aegean Sea, Greece) for two complete year cycles (September 2000-August 2002). Its maximum total length and age were 248 mm and 5 years respectively. The length-weight relationship was W=0.0062TL3.064 for males and W=0.0059TL3.084 for females. The marginal increment analysis on scales (n=1352) confirmed annulus formation during February-March, which coincided with the lowest sea surface temperature prevailing in the study area. The marginal increment ratio for ages 1, 2 and 3 was positively correlated with sea surface temperature (all r >0.4, P< 0.05). The parameters of the von Bertalanffy growth equation were: L?=248.678 mm, K=0.509 yr-1 and t0=-0.881 yr. The comparison of growth parameters for round sardinella, using the auximetric plot, from Mediterranean and northwest African waters indicated different growth patterns between the two areas.

Keywords


age; growth; growth pattern; round sardinella; Aegean; Mediterranean

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