Mahmut YANAR, Hakan Murat BÜYÜKÇAPAR, Yasemin YANAR

Pigmentation of rainbow (Oncorhynchus mykiss) with carotenoids from marigold flower (Tegates arecta) and red pepper (Capsicum annum)

Bu çalışmada, karotenoit içeren çeşitli bitkisel yem kaynaklan ve sentetik astaksantinin gökkuşağı alabalığı (Oncorhynchus mykissymrı pigmentasyonu ve büyümesi üzerine olan etkileri araştırılmıştır. Yaklaşık 111 g olan alabalıklar, % 1,6. 2,4 ve 3,2 oranlarında kadife çiçeği {Tagetes erecta). % 4,4. 6.6 ve 8,8 oranlarında kırmızı biber (Capsicum annum), 100 mg/kg sentetik astaksantin ve kontrol grubundan oluşan diyetlerle 60 gün boyunca beslenmiştir. Gruplar arasında, kas dokuda en yüksek karotenoit birikimini sentetik astaksantin (6.42 mg/kg) sağlarken, bunu eşdeğer total karotenoit içeren (100 mg/kg) kırmızı biber (5.78 mg/kg) ve kadife çiçeği (5,59 mg/kg) izlemiştir (P < 0,05). Kadife çiçeği katkılı dıetlerle beslenen balıklarda, diğer gruplardan farklı olarak sarı renklenme oluşmuştur. Diyetlere, kadife çiçeğinin % 2,4'e, kırmızı biberin ise % 6.6'ya eşdeğer veya daha fazla oranda katılması balıklarda büyümeyi olumsuz etkilemiştir (P < 0,05). Gökkuşağı alabalığının pigmentasyonu için kadife çiçeği ve kırmızı biberin diyetteki en uygun düzeylerinin sırasıyla % 1,6 ve % 4,4 olduğu önerilir.

Kadife çiçeği (Tagetes erecta) ve kırmızı biber (Capsicum annum)' de bulunan karotenoitlerle gökkuşağı alabalığı (Oncorhynchus mykiss)' nin pigmentasyonu

The effects of diets including various natural carotenoid sources and synthetic astaxanthin on the pigmentation and growth of rainbow trout (Oncorhynchus mykiss) were investigated. Rainbow trout weighing about 111 g were fed diets containing 1.6%, 2.4% and 3.2% marigold flower: 4.4%, 6.6% and 8.8% red pepper; 100 mg kg"1 synthetic astaxanthin; and a control diet for 60 days. At the end of the experiment, synthetic astaxanthin provided the highest carotenoid accumulation in the fish flesh (6.42 mg kg ) in the groups. This was followed by red pepper (5.78 mg kg"1) and marigold flower (5.59 mg kg"1), each of which included equal levels (100 mg kg1) of carotenoids (P < 0.05). The fish fed marigold flower experienced yellow pigmentation, which was remarkably different from the other groups. An addition level of 2.4% or higher marigold flower and 6.6% or higher red pepper into the diet had negative effects on growth performance (P < 0.05). It can be concluded that the most appropriate dietary doses of marigold flower and red pepper for pigmentation of rainbow trout are 1.6% and 4.4%, respectively.

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