AGE AND GROWTH OF CAPOETA TRUTTA (PISCES: CYPRINIDAE) FROM KEBAN DAM LAKE, TURKEY
Rahmi Aydin, Metin Çalta*, Dursun Şen*
University of Firat, Collage of Bingöl, Fisheries Program, Bingöl, Turkey
*University of Firat, Faculty of Fisheries, 23119-Elazig, Turkey
ABSTRACT. In this study the ages of Capoeta trutta (Heckel 1843) inhabiting Keban Dam Lake were determined from scales. The mean fork lengths determined using the back-calculation method were l1=70.59, l2=119.37, l3=167.53, l4=195.97, l5=221.03, l6=250.52, l7=274.63 and l8=300.38 mm for males, l1=68.87, l2=117.03, l3=166.34, l4=203.91, l5=230.17, l6=248.20, l7=267.98 and l8=294.69 mm for females, l1=63.45, l2=105.92, l3=151.54, l4=188.20, l5=212.33, l6=245.05, l7=270.85 and l8=295.97 mm for all fish samples. The calculated length of any of the age groups was always smaller than the real length measured for the same age group. The gap between calculated and measured lengths increased when the scales of older fish were used in the calculations.
Key words: age determination, back-calculation method, Capoeta trutta, Keban Dam Lake
Dr Rahmi Aydin, Su Urunlerin Fakultesi 23119, Elazig/ Turkey;