Journal of Tianjin Agricultural University ›› 2016, Vol. 23 ›› Issue (1): 5-5.

• Researches and Scientific Notes • Previous Articles     Next Articles

Effects of Different Dietary Carbohydrate-to-lipid Ratio on Growth, Immune Ability and Antioxidant Enzymes Activity of Carp

CHEN Tian-xiang1, QU Mu1, LÜ Chun-shuang2, LI Chang-e2, BAI Dong-qing1, SUN Jin-hui1, QIAO Xiu-ting1, CHENG Zhen-yan1,Corresponding Author   

  1. 1. Tianjin Key Lab of Aqua-Ecology and Aquaculture, College of Fisheries, Tianjin Agricultural University, Tianjin 300384, China;
    2. Animal Husbandry and Fishery Service Center, Wuqing District, Tianjin 300380, China
  • Received:2015-07-30 Online:2016-03-20 Published:2019-10-14

Abstract: A feeding trial was conducted to explore the effect of different dietary carbohydrate-to-lipid ratio on growth and immune ability of carp. 1 050 carp were randomly divided into 5 groups. Each group has three replicate and each replicate has 70 fish. Five diets were formulated with carbohydrate-to-lipid ratio of 5.2, 6.9, 9.7, 14.8, 27.8. The feeding trial lasted for 63 day. Results showed that dietary carbohydrate-to-lipid (CHO/LIP) ratio level remarkably affected the growth performance of carp (P<0.05). At dietary CHO/LIP ratio of 6.9, the weight gain, special growth ratio got the maximum, while the feed conversion ratio got the minimum. With the increasing of dietary CHO/LIP ratio level, antioxidant capacity of carp first raised and then decreased. At dietary CHO/LIP ratio of 6.9, the activity of superoxide dismutase (SOD) in serum reached the highest level, which was significantly higher than that in fish fed diet with CHO/LIP ratio of 14.8 and 27.8. While the malondialdehyde (MDA) content in serum and hepatopancreas got the minimum when the dietary CHO/LIP ratio was 9.7. Catalase (CAT) activity in serum significantly decreased with the increasing dietary CHO/LIP ratio. At the same time, the glutamic-oxaloacetic transaminase (GOT) and glutamic-pyruvic transaminase (GPT) activity got the minimum at 27.8, and the alkaline phosphatase (AKP) first raised and then went down. Considered the growth and antioxidant enzymes activity, the optimal dietary CHO/LIP ratio of carp was 6.9.

Key words: carp, carbohydrate-to-lipid ratio, growth, immunity, antioxidant

CLC Number: