Investigation of Growth Performance and Survival Rate of Pelophylax ridibundus Tadpoles Reared in Different Stock Densities

In this study, Pelophylax ridibundus tadpoles were grown at different stock density to determine the best growth performance. The tadpoles are grouped as A (0.5 tadpole /L), B (1 tadpole /L) and C (1.5 tadpole /L) according to their stock density. The performance trial was carried out with 180 tadpoles averaging initial weight of 0.013±0.01 and initial length of 7.54±0.06 during 60 days. Tadpoles were fed twice daily with feed containing 39 % crude protein. Water (20 liters) in 30 liter breeding containers was changed every 24 hours for oxygen requirement. A biweekly measurement was made to determine height, weight gain and survival rate. Inversely proportional effect of stock density on length and weight gain was observed. As a result of the study, the highest survival rate (90 %), the best growth rate such as length and weight gain were determined in the group A with the lowest stock density (0,5 tadpole / L) .