Effects of Dietary Lipid Level on Growth Performance, Feed Utilization, Body Composition and Serum Biochemical Indices of Large Size Gibel Carp (Carassius auratus gibelio Block) from Irtysh River

  • GAO Pan ,
  • JIAO Fei ,
  • LIU Jing ,
  • HU Jianyong ,
  • SHI Chunming ,
  • HU Jiangwei ,
  • ZHANG Yu
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  • Scientific Observing and Experimental Station of Fishery Resources and Environment in Northwest China, Ministry of Agriculture, Xinjiang Fishery Research Institute, Urumqi 830000, China

Received date: 2020-09-03

  Online published: 2021-04-15

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Abstract

This experiment was conducted to investigate the effects of dietary lipid level on growth performance, feed utilization, morphological indicators, body composition and serum biochemical indices of large size gibel carp (Carassius auratus gibelio Block) from Irtysh river, and to determine the dietary optimal lipid level. Five practical diets were prepared with lipid levels at 3.88%, 6.52%, 8.87%, 11.25% and 13.52%, respectively, to feed large size gibel carp from Irtysh river[initial body weight was (52.78±0.10) g] for 8 weeks at 21 to 23℃ water temperature. The results showed that, dietary lipid level had no significant influences on the final body weight, the contents of crude protein and ash of whole body, the contents of moisture, crude protein and ash of muscle, the activities of alanine aminotransferase and aspartate aminotransferase and the contents of total protein, albumin and globulin in serum (P>0.05). With the increase of dietary lipid level, the weight gain rate, specific growth rate and feed efficiency were firstly increased and then decreased, and all of them reached the highest values when dietary lipid level was 8.87%; the moisture content of whole body and muscle gradually decreased, and the ether extract content of whole body and muscle gradually increased; the contents of triglyceride, high-density lipoprotein and low-density lipoprotein in serum gradually increased at first and then remained relatively stable when dietary lipid level reached 8.87%. The serum total cholesterol content of fish fed diet with 3.8% lipid level was significantly lower than that of fish fed other diets (P<0.05). With the specific growth rate and feed efficiency as evaluation indices, through broken line analysis and quadratic regression analysis, respectively, the dietary optimal lipid levels of large size gibel carp from Irtysh river are 8.51% to 10.45%.

Cite this article

GAO Pan , JIAO Fei , LIU Jing , HU Jianyong , SHI Chunming , HU Jiangwei , ZHANG Yu . Effects of Dietary Lipid Level on Growth Performance, Feed Utilization, Body Composition and Serum Biochemical Indices of Large Size Gibel Carp (Carassius auratus gibelio Block) from Irtysh River[J]. Chinese Journal of Animal Nutrition, 2021 , 33(4) : 2178 -2186 . DOI: 10.3969/j.issn.1006-267x.2021.04.037

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