Effects of Quantitative Feed Restriction on Serum Triacylglycerol, Cholesterol and Growth Related Hormones in White Pekin Ducks

This study was conducted to evaluate the effect of feed restriction on some biochemical parameters-related to growth in white Pekin duck. Therefore, fifty white Pekin ducks were allocated into two equal groups as ad libitum and feed restriction group, in which each one was arranged in five replicates. The birds were allowed to free feed access from 1 to 7 days and from 15 to 49 days of age and there was feed st th th th restricted from 8 to 14 days. The results indicated that feed restriction induced significant increase in serum th th corticosterone and significant decreases in serum triacylglycerol, cholesterol, duck growth hormone 1 and chicken insulin-like growth factor 1. It has been concluded that even if the feed restriction spares some economic feeding costs but it retards the growth of white Pekin ducks that retardation have been evidenced by the significant decreases in serum duck growth hormone 1 and chicken insulin-like growth factor 1.