تعيين سن هامور معمولي با استفاده از برش و تهيه مقطع از سنگ گوش در آبهاي ساحلي خوزستان

This survey has been done for determination of common grouper fish (Family:Serranidae, Epinephelus coioides) population old structure from January 2000 till May 2002 in Khouzestan coastal waters (Persian Gulf).For age determination, sagita otoliths of 450 fish were taken and countable otolihts were obtained from 425 specimens. Relative frequency distribution of opaque and transparent rings showed that each opaque growth ring generates once a year from November to September. It seemed that generation of opaque rings is affected by temperature and photoperiod changes. Correlation between length and age was Bertalanffys least square method. Following equation was obtained: L(t) : 122.27 (1 - e - 0.146 (t+0.482)) Length and age correlation was calculated by exponential model. Correlation between age and weight of sagita was calculated by total length and age. The most Correlation was between sagita weight and fish age (r = 0.876).