Çal›flma, Bolu-DS‹ Gölköy Bal›k Üretme ‹stasyonu’nda gerçeklefltirilmifl ve 15 fiubat 2000 ile 31 Ocak 2001 aras›nda 350 gün devam etmifltir. Bu çal›flmada, Abant Gölü’nden yakalanan Abant alabal›¤› anaçlar›ndan sa¤lanan yumurtalardan ç›kan larvalar ile Gölköy Bal›k Üretme ‹stasyonu’nda yetifltirilen gökkufla¤› anaçlar›ndan sa¤lanan yumurtalardan ç›kan larvalar kullan›lm›flt›r. I. ve II. deneme 8 grup (4 adet Abant ve gökkufla¤› alabal›¤› deneme, 4 adet Abant ve gökkufla¤› alabal›¤› paralel grubu) olarak düzenlenmifltir. Her 2 deneme de toplam 1784 adet larva kullan›lm›flt›r. Deneme sonunda, Abant alabal›¤› ortalama yafl a¤›rl›¤› 5 gram civar›nda bulunmas›na karfl›n, en yüksek a¤›rl›k art›fl› gökkufla¤› alabal›klar›nda bulunmufltur (I. ve II. deneme de 116,202 ile 173,315 gram aras›nda). Gökkufla¤› ve Abant alabal›¤› gruplar› aras›nda ortalama son kondüsyon faktörü (CF) bak›m›ndan farkl›l›¤›n önemli oldu¤u bulunmufltur (P < 0,001). I. ve II. denemede, türler aras›nda spesifik büyüme oran› farkl›d›r (P < 0,01) (P < 0,05). Sonuç olarak; tank yetifltirme koflullar›nda Abant alabal›¤›n›n geliflim performans›n›n arzu edilen seviyede olmad›¤› görülmüfltür. Buna karfl›n; gökkufla¤› alabal›¤›n›n büyüme ve yaflama oran› Abant alabal›¤› büyüme ve yaflama oran›ndan daha iyi oldu¤u tespit edilmifltir

This experiment was conducted between 15th February 2000 (day 1) and 31st January 2001 (day 350) at the DSI-Gölköy Fish Production Station, Bolu (Turkey). Abant trout larvae obtained from eggs of wild Abant trout broodstocks in Lake Abant and rainbow trout larvae obtained from eggs of the hatchery broodstocks in Gölköy Fish Production Station were used. Trials I and II involved eight groups (four Abant and rainbow trout experimental groups, and four Abant and rainbow trout parallel groups). A total of 1784 larvae was used in both the trials. At the end of the experiment, although the mean wet weight of Abant trout was found to be around 5 g, the maximum increase in weight was found in rainbow trout (between 116.202 and 173.315 g in trials I and II). Final mean condition factors (CF) differed between the Abant and the rainbow trout groups (P < 0.001). The specific growth rate (SGR) exhibited significant differences between trials I and II for the Abant and rainbow trout groups (P < 0.01) (P < 0.05). It is concluded that the desired level of growth performance of Abant trout was not obtained in tank conditions. In contrast, the growth and survival rate of rainbow trout were clearly better than those of Abant trout.