The Effects of using Mechanicaly Modified Cereals on the Growth, Feed Conversion, Fat Content and Fillet Yield of Market Size Common Carp Grown in Ponds

Özet

Effect of supplemental feeding with whole triticaleand processedtriticale on the growth, feed conversion, fat content, and fillet yield of 4-year-old carp was studied under semi-intensive pond farming conditions. The trial was conducted in 83day-experiment in duplicate experimental ponds. Fish fed pressed or ground triticale reached significantly (P<0.05) higher mean individual weight gain (IWG 1.00 and 0.95 kgind-1, respectively) and specific growth rate (SGR 0.70 and 0.68% d-1, respectively) than that of carp fed wholetriticale (IWG 0.86 kgind-1 and SGR 0.61%d-1).Processed filet yield with skin did not significantly differ between groups fed processedand wholetriticale (44.33 and 44.78%, respectively). We found moderate positive correlation (Spearman's ? test;r2= 0.38) between fillet yield and correlation (r2= 0.11)between fillet yield and standard body length. Significantly (P<0.05) lower mean values of IWG (0.65 kgind-1), SGR (0.49%d-1), fat content (4.6%), and fillet yield (41.9%) were observed in a group of fish dependent only on natural zooplankton. Common carp is able to better utilize pressed and ground triticale compared to whole triticale, which was indicated by the decreased FCR of14.1% and 9.5%, respectively.