Effects of Linseed Oil on Growth Performance and Meat Quality of Tilapia (Oreochromis niloticus)

PENG Xianghe; LI Fajian; LIN Shimei; ZHU Wangming; GUAN Yong

doi:10.3969/j.issn.1006-267x.2015.01.018

Chinese Journal of Animal Nutrition >

2015 , Vol. 27 >Issue 1: 147 - 153

DOI: https://doi.org/10.3969/j.issn.1006-267x.2015.01.018

Aquaculture Nutrition

Effects of Linseed Oil on Growth Performance and Meat Quality of Tilapia (Oreochromis niloticus)

PENG Xianghe ,
LI Fajian ,
LIN Shimei ,
ZHU Wangming ,
GUAN Yong

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1. College of Animal Science and Technology, Southwest University, Chongqing 400716, China;
2. Key Laboratory of Freshwater Fish Resources and Reproductive Development of Ministry of Education, Chongqing 400716, China;
3. Guangzhou Sintun Aqua-Tech Co., Ltd., Guangzhou 510642, China

Received date: 2014-07-11

Online published: 2015-01-10

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Abstract

An 8-week feeding experiment was conducted to investigate the effects of linseed oil on growth performance and meat quality of tilapia (Oreochromis niloticus). Four isonitrogenous (crude protein content was 33.5%) experimental diets were formulated to contain 0 (control), 1.5%, 3.0% and 4.5% linseed oil based on a practical diet, respectively. A total of 360 GIFT strain tilapia with the initial average body weight of (9.15±0.03) g were randomly allocated into 4 groups with 3 replicates per group and 30 fish per replicate. The results showed as follows: the final body weight and specific growth rate in the 3.0% and 4.5% groups were significantly higher than those in the control group and 1.5% group (P<0.05), while the feed conversion ratio in the 3.0% and 4.5% groups was significantly lower than that in the control group (P<0.05). The protein efficiency rate in 4.5% group was significantly higher than that in the other groups (P<0.05). The content of whole-body crude lipid in the 4.5% group was significantly higher than that in the other groups (P<0.05), while the content of whole-body crude protein in the 3.0% and 4.5% groups was significantly lower than that in the control group (P<0.05). The contents of C20: 5n-3 (eicosapentaenoic acid, EPA) and n-3 polyunsaturated fatty acids (PUFA), and n-3/n-6 PUFA in muscle in the 3.0% and 4.5% groups were significantly higher than those in the control group (P<0.05), and the content of C22: 6n-3 (docosahexaenoic acid, DHA) in muscle in the 3.0% and 4.5% groups was significantly higher than that in the control group and 1.5% group (P<0.05). The content of C22: 5n-3 (docosapentaenoic acid, DPA) in muscle in the 3.0% group was significantly higher than that in the control group and 1.5% group (P<0.05). The content of PUFA in muscle in the 4.5% group was significantly higher than that in the control group (P<0.05), while no significant difference was found among 1.5%, 3.0% and 4.5% groups (P>0.05). The results indicate that linseed oil supplementation can improve the growth performance and meat quality of tilapia, and the suitable supplemental level is 3.0%.

Key words： tilapia; linseed oil; growth performance; body composition; meat quality

Cite this article

PENG Xianghe , LI Fajian , LIN Shimei , ZHU Wangming , GUAN Yong . Effects of Linseed Oil on Growth Performance and Meat Quality of Tilapia (Oreochromis niloticus)[J]. Chinese Journal of Animal Nutrition, 2015 , 27(1) : 147 -153 . DOI: 10.3969/j.issn.1006-267x.2015.01.018

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