Age and growth of Gerres oyena (Forsskål, 1775) on Okinawa Island, Japan

Summary Age and growth were studied for Gerres oyena (Forsskål, 1775) on Okinawa Island, southern Japan from November 2002 to November 2005. A total of 408 samples was collected ranging from 5.85 to 19.65 cm standard length ( L SL ). Male fish age was estimated at up to 6 +  years, whereas females reached 8 +  years as estimated by sectioned otoliths. The length–weight relationships and the von Bertalanffy growth curve were described for all individuals as: and L t  = 20.54{1 − e −0.1807( t +2.8462) }, respectively. Opaque rings were formed from April to August during the spring–summer seasons.