The present work was aimed at determining the population structure, growth and mortality of Crucian carp (Carassius gibelio) population in Buldan Dam Lake, in the Gediz River basin. A total of 2325 specimens were caugth monthly by the trammel nets during September 1995-August 1996. The sex composition was 99.44% females and 0.56% males. Maximum age group was determined as VI. Fork lenght and total weight of the specimens ranged from 9.7 to 25.5 cm and from 23.6 to 269.1 g. The length-weight relationship was estimated as W=0.031L2.87 for all individuals. von Bertalanffy growth parameters were computed as L∞=31.66 cm, W∞=635.91 g, k=0.146 year-1 ve t0=-2.166 year. The ratios of total mortality, natural mortality and fishing mortality were calculated as 0,632 year-1, 0,456 year-1 and 0,176 year-1, respectively.

The present work was aimed at determining the population structure, growth and mortality of Crucian carp (Carassius gibelio) population in Buldan Dam Lake, in the Gediz River basin. A total of 2325 specimens were caugth monthly by the trammel nets during September 1995-August 1996. The sex composition was 99.44% females and 0.56% males. Maximum age group was determined as VI. Fork lenght and total weight of the specimens ranged from 9.7 to 25.5 cm and from 23.6 to 269.1 g. The length-weight relationship was estimated as W=0.031L2.87 for all individuals. von Bertalanffy growth parameters were computed as L∞=31.66 cm, W∞=635.91 g, k=0.146 year-1 ve t0=-2.166 year. The ratios of total mortality, natural mortality and fishing mortality were calculated as 0,632 year-1, 0,456 year-1 and 0,176 year-1, respectively.