Effects of feeding frequency on nutrient digestibility and growth performance of rainbow trout (Oncorhynchus mykiss) fed a high lipid diet

The effect of feeding frequency on nutrient digestibili\udty and growth performance was investigated in rainbow\udtrout (\udOncorhynchus mykiss\ud) fed a high lipid diet. The experimental diet contained 25.2% crude lipid and 40.7% crude\udprotein. Two feeding frequencies were tested: 2 meals per day (Group I) and 6 meals per day (Group II). Fish were fed a\udrestricted daily ration (1.5% of body weight) divided into equal meals.\udAt the end of the experiment, the weight gain in Group I and II was 84.6% and 90.1%, respectively. There was no\udstatistically significant difference between groups. The crude\udlipid and protein digestibility values were above 95% in\udboth groups. The feed conversion ratios of Group I and II were 1.28 and 1.21, respectively. There was no significant\uddifference between the 2 groups. Because nutrient digestibility\ud, growth, and feed efficiency were not significantly enhanced\udwhen feeding was increased from twice to 6 times daily, f\udeeding twice per day was considered to be sufficient for rainbow\udtrout fed the high lipid diet in this experiment.Bu ?al??mada, y?ksek ya? i?eri?ine sahip bir yem\udle farkl? yemleme s?kl???n\udda yemlemenin, g?kku?a??\udalabal?klar?nda besin maddelerinin sindirimi ve b?y?me perfor\udmans? ?zerine etkisi ara?t?r?lm??t?r. Deneme yemi % 25,2\udham ya? ve % 40,7 ham protein i?eri?ine sahiptir. Denemede\ud1. gruba 2, 2. gruba 6 kez ol\udmak ?zere iki farkl? yemleme\uds?kl??? uygulanm??t?r. Bal?klar\ud, v?cut a??rl???n?n % 1,5?i oran?nda\udve g?nde iki kez yemlenmi?tir.\udDenemenin sonunda y?zde a??rl?k art??? 1. grupta % 84,6 ve 2. gr\udupta % 90,1 olarak tespit edilmi?tir. Gruplar aras?nda\udistatistiksel a??dan ?nemli bir fark bul\udunmam??t?r. Ham ya? ve ham protein sindiril\udme oranlar? her iki grupta da % 95\udcivar?nda bulunmu?tur. Yem de?erlendirme say?s? birinci gr\udupta 1,28, 2. grupta 1,21 olarak tespit edilmi?tir. Gruplar aras?nda istatistiksel a??dan\ud?nemli bir fark bulunmam??t?r. G?kku?a?? ala\udbal???nda ya? oran? y?ksek yemle beslemede\udyemleme s?kl??? 2?den 6?ya ??\udkar?ld???nda besin maddesi sindirilme oranlar?,\udb?y?me ve yem de?erlendirme de?erlerinde\udistatistiksel a??dan herhangi bir art?\ud? tespit edilmedi?inden, g?nde 2 kez yemlem\udenin yeterli oldu?u sonucuna var?labilir