تاثير مكمل ال كارنيتين روي شاخص هاي رشد و تركيبات لاشه ماهي سفيد درياي خزر (Rutilus frisii kutum Kamenskii 1901)

Effect of L-carnitine food additive on growth indices and body composition of Caspian Sea Kutum (Rutilus firsii kutum

در اين پژوهش به‌ منظور بررسي اثر ال‌ كارنتين روي شاخص ‌هاي رشد و تركيبات لاشه ماهي‌ سفيد، آزمايشي با 240 قطعه ماهي با ميانگين وزن اوليه 2/5±13/21 گرم در مدت 70 روز انجام پذيرفت. ماهي‌ ها به‌ طور تصادفي در 12 تانك (20 ماهي در هر تانك) قرار داده شدند. ال‌ كارنتين به‌ ميزان 500، 1000 و 2000 ميلي‌ گرم در هر كيلوگرم جيره غذايي اضافه شد و با جيره شاهد مقايسه گرديد. جيره غذايي ماهيان به‌ صورت دست‌ ساز بود و ماهيان به‌ ميزان 7 درصد وزن بدن‌شان و 3 بار در روز تغذيه شدند. مقادير مختلف ال‌ كارنتين بر افزايش وزن نهايي بدن، درصد افزايش وزن بدن، ضريب رشد ويژه، ضريب چاقي و درصد خاكستر لاشه اثر معني ‌داري نداشت (0/05

In this research for evaluate the effect of L- Carnitine on growth and body composition in Caspian Sea Kutum (Rutilus firsii kutum), an experiment with 240 pieces of fish (means weight 13.21 ± 2.5) was done during 70 days. Fish were randomly allocated in 12 tanks (20 fish per tank) The L-Carnitin level of diets was 500, 1000 and 2000 mgkg-1 of diet. Fish were fed of the three levels of L-carnitine with 7 percent body weight (3 times a day).The different level of L-Carnitine did not have a significant effect on body weight gain, the percent of body weight gain, specific growth rate, overweight rate and the percent of ash (P> 0.05) but, had a significant effect on percent of protein and lipid among different treatment (P<0.05). As the result, the different level of L-Carnitine did not have a significant effect on Caspian Sea Kutum growth but had effect on roach carrion quality.