Short Communications

Effects of Main Nutrient Element and Source on Growth, Body Color, Digestion and Absorption of Plectropomus leopardus in Industrialized Culture

  • ZHOU Bangwei ,
  • LI Yong ,
  • GAO Tingting ,
  • LIU Yang ,
  • ZHAO Ningning ,
  • YU Xuequan ,
  • HU Jincheng
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  • 1. Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;
    2. University of Chinese Academy of Sciences, Beijing 100049, China;
    3. National & Local Joint Engineering Laboratory for Ecological Mariculture, Qingdao 266071, China;
    4. Tianjin Haifa Zhenpin Industrial Development Co., Ltd., Tianjin 300452, China

Received date: 2013-11-07

  Online published: 2014-05-05

Abstract

This experiment aimed to investigate the effects of main nutrient element and source on growth, body color, digestion and absorption of Plectropomus leopardus in industrialized mariculture condition. A 2×2×2 three-factor experiment design which including two nutrient element factors [protein level: 46% protein (P46) and 50% protein (P50); lipid level: 8% lipid (L8) and 10% lipid (L10)] and one pigment source factor [vegetal protein source pigment (VPP) and animal protein source pigment (APP)] was used to formulate 8 experiment diets (treatments 1# to 8#). Juvenile Plectropomus leopardus with an initial body weight of (64.2±1.1) g were fed 8 experiment diets for 94 days, and each treatment had 3 replicates and 30 fish in each replicate. The results showed as follows: the weight gain rate in treatment 4# (P46, L10 and APP combination) was significantly increased compared with treatments 2# (P46, L8 and APP combination), 3# (P46, L10 and VPP combination), 5# (P50, L8 and VPP combination), 6# (P50, L8 and APP combination) and 8# (P50, L10 and APP combination) (P<0.05 or P<0.01), and the feed conversion rate was significantly decreased compared with treatments 2# and 7# (P50, L50 and VPP combination). 2) The skin carotene content in treatment 6# was significantly increased compared with treatments 3#, 4# and 8# (P<0.05 or P<0.01). The skin carotene and melanin contents of trial fish were increased or decreased by the same pace under different treatments. 3) Comparatively speaking, treatment 7# had the highest lipase and pepsin activities and the higher amylase and trypsin activities; the activities of alkaline phosphatase and Na+,K+-ATPase in treatment 6# were the highest, and significantly higher than those in treatments 1# to 3# (P<0.05 or P<0.01). Therefore, the change and interaction of dietary main nutrient element and source affect growth, skin color, digestion and absorption of Plectropomus leopardus, and P50, L8 and APP combination is determined preliminarily to be the ideal combination giving consideration to growth, skin color, digestion and absorption.

Cite this article

ZHOU Bangwei , LI Yong , GAO Tingting , LIU Yang , ZHAO Ningning , YU Xuequan , HU Jincheng . Effects of Main Nutrient Element and Source on Growth, Body Color, Digestion and Absorption of Plectropomus leopardus in Industrialized Culture[J]. Chinese Journal of Animal Nutrition, 2014 , 26(5) : 1387 -1401 . DOI: 10.3969/j.issn.1006-267x.2014.05.033

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