Effects of Replacement of Fish Oil by Linseed Oil on Growth Performance, Lipid Metabolism and Antioxidant Ability in Hepatopancreas of Common Carp (Cyprinus carpio)

PAN Yu; CHEN Wenyan; LIN Shimei; GAO Qiping; LUO Li

doi:10.3969/j.issn.1006-267x.2014.02.018

2014 , Vol. 26 >Issue 2: 420 - 426

DOI: https://doi.org/10.3969/j.issn.1006-267x.2014.02.018

Aquaculture Nutrition

Effects of Replacement of Fish Oil by Linseed Oil on Growth Performance, Lipid Metabolism and Antioxidant Ability in Hepatopancreas of Common Carp (Cyprinus carpio)

PAN Yu ,
CHEN Wenyan ,
LIN Shimei ,
GAO Qiping ,
LUO Li

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1. Tongwei Co., Ltd., Special Fisheries Research Institute, Chengdu 610041, China;
2. College of Animal Science and Technology, Southwest University, Chongqing 400716, China;
3. Key Laboratory of Freshwater Fish Resources and Reproductive Development of Ministry of Education, Chongqing 400716, China

Received date: 2013-08-07

Online published: 2014-01-27

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Abstract

In order to study the effects of replacement of different levels of fish oil by linseed oil on growth performance, body composition and indices of lipid metabolism and antioxidant in hepatopancreas of common carp, five isonitrogenous and isoenergetic experimental diets (crude protein content was 35%, and gross energy was 15 MJ/kg) were formulated by replacing 0 (control group), 25%, 50%, 75% and 100% fish meal with linseed oil on basis of a practical diet, respectively. Common carp with the initial body weight of (5.81±0.03) g in five groups were fed five experimental diets for 8 weeks in the room circulation farming system. The results showed as follows: with the increase of linseed oil to replace fish oil level, the specific growth rate (SGR) of carp showed a trend of first increase and then decrease, while the feed conversion ratio (FCR) was just the opposite. The highest SGR was found in 25% group, and significantly higher than that in 75% and 100% groups (P<0.05); the lowest FCR was found in 25% group, and significantly lower than that in 100% group (P<0.05). No significant differences were found among all groups in protein efficiency ratio (PER) and survival rate (SR) (P>0.05). The whole fish crude protein content in control group was significantly higher than that in other groups (P<0.05), while the crude fat content was significantly lower than that in other groups except 25% group (P<0.05). No significant differences were found among all groups in whole fish ash and moisture contents (P>0.05). With the increase of linseed oil to replace fish oil level, the hepatopancreas lipoprotein lipase (LPL) activity and total anti-oxidant capability (T-AOC) were gradually reduced and the hepatopancreas malate dehydrogenase (MDH) activity was gradually increased, but no significant differences were found in those indices between control group and 25% group (P>0.05). Replacement of different levels of fish oil by linseed oil had no significant effect on hepatopancreas superoxide dismutase (SOD) activity (P>0.05). Thus, replacement of different levels of fish oil by linseed oil have different effects on growth performance, lipid metabolism and antioxidant ability in hepatopancreas of common carp. Replacement of 25% fish oil by linseed oil, the growth of common carp shows the best effect; total replacement of fish oil by linseed oil can hinder the growth of common carp, and endanger the health of hepatopancreas.

Key words： common carp; linseed oil; fish oil; growth performance; lipid metabolism; antioxidant ability

Cite this article

PAN Yu , CHEN Wenyan , LIN Shimei , GAO Qiping , LUO Li . Effects of Replacement of Fish Oil by Linseed Oil on Growth Performance, Lipid Metabolism and Antioxidant Ability in Hepatopancreas of Common Carp (Cyprinus carpio)[J]. Chinese Journal of Animal Nutrition, 2014 , 26(2) : 420 -426 . DOI: 10.3969/j.issn.1006-267x.2014.02.018

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