Comparison of time-restricted and ad libitum self-feeding on the growth, feeding behavior

Comparison of time-restricted and ad libitum self-feeding on the growth, feeding behavior and daily

digestive enzyme profiles of Atlantic salmon

SHI Ce;LIU Ying;YI Mengmeng;ZHENG Jimeng;TIAN Huiqin;DU Yishuai;LI Xian;SUN Guoxiang

【期刊名称】《中国海洋湖沼学报（英文版）》 【年(卷),期】2017(035)004

【摘要】Although it has been hypothesized that a predictable feeding regime in animals allows physiological variables to be adjusted to maximize nutrient utilization and,hence,better growth performance,the assumption has rarely been tested.This study compares the effects of time-restricted versus free access self-feeding on the growth,feeding behavior and daily digestive enzyme rhythms of Atlantic salmon (Salmo salar).In an experiment that lasted 6 weeks,fish (109.9 g) were divided into two groups:group 1 had free access to a self-feeder (FA);group 2 received three meals per day (2 h per meal) at dawn,midday and dusk via a time-restricted self-feeder (TR).At the end of the experiment,the fish were sampled every 3 h over a 24-h period.The results showed that the TR fish quickly synchronized their feeding behavior to the feeding window and their blood glucose showed a significant postprandial increase,while FA fish displayed no statistically significant rhythms (P＞0.05).Pepsin activity of TR fish also showed a significant daily rhythm (P