Some population parameters of Capoeta umbla (Heckel, 1843) in the Boztepe Recai Kutan Dam Lake (Malatya)

Objective: The aim of this study is determine some biological properties of Capoeta umbla population and this is first study in the Boztepe Recai Kutan Dam Lake. Methods: Fish samples were caught from Boztepe Recai Kutan Dam Lake between February-March-April 2014. The fish samples were collected using the gill nets with mesh sizes between 36 and 100 mm and each net was 100 m in length. Total length and weight of the each fish sample were measured and their ages were determined from the otolith. To determine sex of fishes were investigated gonads by opened its abdomen. Condition factor was calculated from CF= (W*100)/L3 equation. The length-weight relationship was determined with Le Cren’s W= a*Lb equation and the age-length relationship was determined with the von Bertalanffy’s Lt =L∞*(1-e-K*(t –t0)) equation. Results and Discussion: A total of 318 C. umbla samples (131 males and 187 females) were investigated and age distribution of the population were determined between I and X years old. The mean total length values were determined between 10.2-45.2 cm in male individuals; between 11.10-46.83 cm in female individuals, and the mean weight values were determined between 11.20-602.00 g in male individuals; between 23.00-678.00 g in female individuals. The equation of total length-weight relationship were found as W= 0.010TL2.8375 for all individuals. Fish age-total length relationship were found as Lt= 51.29*(1-e-0.15*(t+1.99)) for all individuals. The mean condition factor values were determined between 0.845-0.968 in male individuals; between 0.703-0.998 in female individuals. As a result of fishing activities carried out on the dam consideration of these data it is very important for the sustainable fishing of the population