Özet:

The Sücüllü Dam Lake (SDL), located in the Eğirdir lake basin within the borders of the Yalvaç district of Isparta province. It was built in 1973 for irrigation and flood control. This study, it was aimed to estimate the carrying capacity for cage fish farming. The research was carried out between May 2017 and April 2018, a total of 9 sampling points selected in two streams inflow to SDL and in the dam lake. In the study, the average depth of SDL as 7.77 m, its length as 3000 m, its width as 275 m, the coastline as 6000 m, and the coastline development (DL) as 1.86 were found. In the study orthophosphate phosphorus 7,9±3,17 mg/m3 and total phosphorus 41,14±21,5 mg/m3. were determined. SDL's carrying capacity for rainbow trout cage farming was estimated according to Dillon-Rigler method. Carrying capacity at minimum water level (26.28 ha area and 0.57 hm3 volume) estimated as 0.4 ton/year and at current water level (82.32 ha area and 6.4 hm3 volume) 18.94 tons/year. The average of these two values, SDL's carrying capacity was calculated as 9.67 tons/year. It was concluded that it would be more appropriate to consider the area and volume data at the minimum water level, not the data at the current water level only, in the estimations of the carrying capacity in the dam lakes where water level changes are high such as SDL. In addition, it concluded the achieved fish production values in cages in the past years, was considered higher comparing to estimated carrying capacity.

Anahtar Kelimeler: