Effects of Dietary Lipid Level on Growth Performance, Digestive Enzyme Activities and Antioxidant Ability of Juvenile Paramisgurnus dabryanus

ZENG Benhe; LIAO Zengyan; WU Shuang; ZHAO Jiexin; XIANG Xiao; WANG Qiang

doi:10.3969/j.issn.1006-267x.2016.04.019

2016 , Vol. 28 >Issue 4: 1105 - 1113

DOI: https://doi.org/10.3969/j.issn.1006-267x.2016.04.019

AQUACULTURE NUTRITION

Effects of Dietary Lipid Level on Growth Performance, Digestive Enzyme Activities and Antioxidant Ability of Juvenile Paramisgurnus dabryanus

ZENG Benhe ,
LIAO Zengyan ,
WU Shuang ,
ZHAO Jiexin ,
XIANG Xiao ,
WANG Qiang

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Key Laboratory of Aquatic Science of Chongqing, Key Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, Department of Fisheries in Rongchang Compust, Southwest University, Chongqing 402460, China

Received date: 2015-11-15

Online published: 2016-04-11

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Abstract

This experiment was aimed to investigate the effects of dietary lipid level on growth performance, digestive enzyme activities and antioxidant ability of juvenile Paramisgurnus dabryanus. Six diets were formulated by containing 2.50%, 4.49%, 6.48%, 8.47%, 10.46% and 12.45% lipid, respectively. A total of 1620 juvenile Paramisgurnus dabryanus with an initial body weight of(0.15±0.01) g were randomly divided into 6 groups with 3 replicates per group and 90 fish per replicate. Each diet was fed one group of 90 fish for 60 d. The results showed that specific growth rate(SGR) had the highest value(4.99%/d) when the dietary lipid level was 8.47%, and it was significantly higher than that in other experimental groups(P<0.05) except the 10.46% group(P>0.05); feed conversion ratio(FCR) had the lowest value(1.09) when the dietary lipid level was 8.47%, and it was significantly lower than that in other experimental groups(P<0.05) except the 10.46% group(P>0.05). By quadratic polynomial regression analysis, dietary lipid levels were 9.18% and 9.00% when the juvenile Paramisgurnus dabryanus had the optimal SGR and FCR, respectively. With the dietary lipid level increasing, the hepatopancreas and foregut protease and lipase activities of fish were increased at first and then decreased, and all them had the highest values when the dietary lipid level was 8.47%, which were significantly higher than those in other experimental groups(P<0.05) except the 10.46% group(P>0.05); the amylase activities in hepatopancreas and foregut were decreased at first and then tend to stabilized. Both of the superoxide dismutase(SOD) and catalase(CAT) activities in hepatopancreas were increased at first and then decreased with the dietary lipid level increasing, and all them had the highest values when the dietary lipid level was 8.47%, which were significantly higher than those in other experimental groups(P<0.05) except the 10.46% group(P>0.05). Above results show that suitable dietary lipid level can improve the growth, protease and lipase activities and antioxidant ability of juvenile Paramisgurnus dabryanus. We suggest that the optimal dietary lipid level for juvenile Paramisgurnus dabryanus is 8.47% to 10.46% through comprehensive analysis of growth performance, digestive enzyme activities and antioxidant ability.

Key words： juvenile Paramisgurnus dabryanus; growth performance; dietary lipid level; digestive enzyme activities; antioxidant ability

Cite this article

ZENG Benhe , LIAO Zengyan , WU Shuang , ZHAO Jiexin , XIANG Xiao , WANG Qiang . Effects of Dietary Lipid Level on Growth Performance, Digestive Enzyme Activities and Antioxidant Ability of Juvenile Paramisgurnus dabryanus[J]. Chinese Journal of Animal Nutrition, 2016 , 28(4) : 1105 -1113 . DOI: 10.3969/j.issn.1006-267x.2016.04.019

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