Estimation of the reproduction growth and mortality rates of the silverbelly (Leiognathus klunzindgeri) and scaldfish (Arnoglossus laterha) population from the Yumurtalık (Adana) bight

In this study, it was determined for silverbelly and scaldfish that their reproduction periods were from April to September and December to June respectively; they reached first maturity at II. year and 5.65cm to 6.6cm, long; roe diameter was langerr than 0.65mm and 0.45mm; mean annual fecundity was 2789+2109 and 11932+12500 respectively, von. Bertalanffy growth constants were calculated by using growth characteristics. The growth constants for silverbelly L«f=10.28cm, K=0.29year"1, t0=-0.42year, W«,=11.75gr and for scaldfishes were Lao=15.88cm, K^.Oyear"1, t0=-1.54year and W0O=27.64gr. It was estimated that the highest growth in Length and Weight for silverbelly between the age groups I. to II. and II. to III; for scaldfish I. to II. and V. to VI. Also for those two species, it was estimated that total mortality were Z=0.9609 and 0.5319 and its components were M=0.6460 and 0.3616, and F=0.314 and 0.1700 respectively. Key Words: Silverbelly, Scaldfish, Reproduction, von Bertalanffy Growth Constants, Mortality Rates II