Karadeniz kalkan bal›¤› Scophthalmus maximus’n›n büyümesi üzerine s›cakl›¤›n etkisini araflt›rmak amac›yla, do¤al (ortalama 15.2±0.6°C), 18, 20, 22 ve 24°C su s›cakl›klar›nda 34.4±9.9 g bafllang›ç a¤›rl›¤›ndaki bal›klarla yetifltiriclik denemeleri yap›lm›flt›r. 30 gün süren deneme süresince bal›klar günde üç kez doyuncaya kadar ticari pelet yem ile yemlendiler. Yaflama oranlar› kontrol grubundan bafllayarak s›ra ile %100, 83.4, 68.4, 3.4 ve 1.7 olarak gerçekleflti. Ortalama a¤›rl›klar denemenin bafllang›c›nda hemen hemen eflit olmas›na ra¤men, deneme sonunda önemli oranda de¤iflti. Büyüme oran› yükselen s›cakl›kla azald› ve en yüksek spesifik büyüme %2.2 ile kontrol grubunda gözlendi, 22 ve 24°C gruplarda negatif büyüme elde edildi. Bütüns›cakl›k gruplar› için günlük yemleme oran› %2.3-2.8 aras›nda de¤iflti ve kontrol grubunda yem de¤erlendirme oran› di¤er gruplardan önemli oranda düflük ç›kt› (p<0.05). Sonuç olarak Karadeniz kalkan› yavrular›n›n yetifltiricili¤inde su s›cakl›¤›n›n 18°C’den yüksek olmamas› gerekti¤i ortaya konmufltur.

A rearing experiment was carried out to examine the effect of water temperature on the growth of the Black Sea turbot, Scophthalmus maximus, at ambient temperature (mean 15.2±0.6°C), 18, 20, 22 and 24°C with fish of 34.4±9.9 g initial body weight. The experiment lasted 30 days and the fish were fed to satiation three times a day with a commercial pelleted diet. Survival rates starting with the control group were 100, 83.4, 68.4, 3.4, and 1.7%, respectively. Although the mean weights of the groups were very similar at the beginning of the experiment, they had become markedly varied by the end. The growth rate gradually decreased with increasing temperature, and the highest specific growth rate of 2.2% was observed in the control group reared at ambient temperature, and the growth was negative in the 22 and 24°C groups. For all temperature groups, the daily feeding rates varied between 2.3 and 2.8% of body weight, and the food conversion ratio of the control group was significantly lower than that of the other groups (P