This preliminary study was conducted to shed light on characterization of migrating female sil-ver and sedentary yellow eels from Göksu Delta (Eastern Mediterranean) by providing some basic morphometric and biometric parameters and indices. Mean body weight and total length of migrating female silver eels were found to be 72.90 cm and 890.27 g respectively. In female yellow eels mean total body length was measured as 57.45 cm and mean body weight was found to be 384.86 g. The mean values of total length, body weigh, gonad weigh, liver weight, eye index, gonado-somatic index, and condition factor of migrating silver were significantly higher than those of yellow eels (P0.05). Gonado-somatic index was not found to be correlated to total length and eye index in female silver eels.
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