Effects of Total Replacement of Fish Oil by Mixed Oils with Different Ratios of Linseed Oil and Soybean Oil on Growth of Hybrid Sturgeon (Acipenser baeri Brandt♀&times;A. schrenckii Brandt♂)

LIU Caixia, XING Wei, LIU Yang, LI Tieliang, MA Zhihong, JIANG Na, LI Wentong, LUO Lin

doi:10.3969/j.issn.1006-267x.2017.12.019

2017 , Vol. 29 >Issue 12: 4386 - 4397

DOI: https://doi.org/10.3969/j.issn.1006-267x.2017.12.019

Molecular Nutrition

Effects of Total Replacement of Fish Oil by Mixed Oils with Different Ratios of Linseed Oil and Soybean Oil on Growth of Hybrid Sturgeon (Acipenser baeri Brandt♀×A. schrenckii Brandt♂)

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1. Beijing Fisheries Research Institute, Beijing 100068, China;
2. Beijing Chaoyang Hatchery and Aquaculture Farm, Beijing 100018, China

Received date: 2017-06-02

Online published: 2017-12-04

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Abstract

The objective of this study was to evaluate the effects of total replacement of fish oil by mixed oils with different ratios of linseed oil and soybean oil on growth performance, muscle fatty acid composition and serum liver function and antioxidant indices of hybrid sturgeon (Acipenser baeri Brandt♀×A. schrenckii Brandt♂). Four isonitrogenous, isolipidic and isoenergetic experimental diets were formulated. The diet of group A included 8% fish oil, in the diets of groups B, C and D, mixed oils were used to totally replace the fish oil of group A's diet, and the ratios of linseed oil and soybean oil in the mixed oils were 3:1 (75% linseed oil+25% soybean oil, group B's diet), 1:1 (50% linseed oil+50% soybean oil, group C's diet) and 1:3 (25% linseed oil+75% soybean oil, group D's diet), respectively. All diets were fed to three replicates of 40 hybrid sturgeon[initial body weight of (70.8±0.5) g] each replicate for 12 weeks. The results showed that fish in group B had the highest final body weight (FBW), weight gain rate (WGR) and specific gain rate (SGR) among all groups, and had significant differences with group A (P<0.05). The content of crude lipid in muscle and liver in group B was significantly higher than that in group A (P<0.05), but no significant difference was found between groups C and D (P>0.05). Fish fed diets of groups A and B had significantly higher serum total antioxidant capacity (T-AOC) than fish fed diets of groups C and D (P<0.05). The fish in group B had the highest contents of high-density lipoprotein cholesterol (HDL-C) and low-density lipoprotein cholesterol (LDL-C), which were significantly higher than those in other groups (P<0.05). The fish in group C had the lowest triglyceride (TG) content, which was significantly lower than that in group C (P<0.05), but no significant difference was found between groups A and D (P>0.05). Moreover, the eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) contents in muscle in group B were as much as 65.7% and 74.5%, respectively, compared with group A. In other words, the contents of EPA and DHA in muscle had not decreased sharply when mixed oils were used to replace the fish oil. In summary, total replacement of fish oil by mixed oils with different ratios of linseed oil and soybean oil, when the ratio of linseed oil and soybean oil is 3:1 (75% linseed oil+25% soybean oil), the hybrid sturgeon has the better effect of growth.

Key words： hybrid sturgeon (Acipenser schrenckii Brandt♀×A. baeri Brandt); fish oil; linseed oil; soybean oil; growth performance; fatty acids

Cite this article

LIU Caixia, XING Wei, LIU Yang, LI Tieliang, MA Zhihong, JIANG Na, LI Wentong, LUO Lin . Effects of Total Replacement of Fish Oil by Mixed Oils with Different Ratios of Linseed Oil and Soybean Oil on Growth of Hybrid Sturgeon (Acipenser baeri Brandt♀×A. schrenckii Brandt♂)[J]. Chinese Journal of Animal Nutrition, 2017 , 29(12) : 4386 -4397 . DOI: 10.3969/j.issn.1006-267x.2017.12.019

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