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Comparison of time-restricted and ad libitum self-feeding on the growth,feeding behavior and daily digestive enzyme profiles of Atlantic salmon

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Chinese Journal of Oceanology and Limnology 2017年第4期35卷 729-736页

作者：史策刘鹰衣萌萌郑纪盟田会芹杜以帅李贤孙国祥 Institute of Oceanology Chinese Academy of Sciences National & Local Joint Engineering Laboratory of Ecological Mariculture Dalian Ocean University School of Marine Science and Environment Engineering University of Chinese Academy of Sciences

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 *** 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 a24-h *** 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(Pdaily trypsin,lipase and amylase levels of FA fish were significantly lower than those of TR fish(P0.05).In conclusion,the study failed to confirm a link between the entrainment of daily digestive enzyme profiles and growth performance,with the TR group showing comparatively poor blood glucose regulation.

关键词： Atlantic salmon (Salmo salar) self-feeding regime feeding behavior digestive physiology daily rhythm

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