饲粮n-6/n-3多不饱和脂肪酸配比对北极狐冬毛期体脂沉积、体脂肪酸组成及血液生化指标的影响

doi:10.11843/j.issn.0366-6964.2017.06.010

Abstract

Abstract:

This experiment was conducted to study the effect of dietary n-6/n-3 PUFA ratio on body fat deposition, body fatty acid composition and serum biochemical parameters of male Arctic foxes during the winter fur-growing period. Forty-eight male Arctic foxes of 157-day-old with average body weight of(5 658±47)g were randomly divided into 4 groups with 12 replicates per group and 1 fox per replicate, and they were fed experimental diets containing n-6/n-3 PUFA ratio for 3,18, 41,136, respectively. The composition and proportion of oil were 12% fish oil and 2% soybean oil (Group Ⅰ), 9.38% corn oil and 4.62% soybean oil (Group Ⅱ), 12% corn oil and 2% soybean oil (Group Ⅲ), 1.5% fish oil and 12.5% corn oil (Group Ⅳ), respectively. The experiment was 7 days for adaption and 40 days for trial period. The results showed as follows: 1) Dietary n-6/n-3 PUFA ratio extremely significantly affected hepatic somatic index(P<0.01), but no significant effect on hepatic fat content, liver fat percentage, subcutaneous fat weight and subcutaneous fat percentage(P>0.05) during the winter fur-growing period. The hepatic somatic index in group Ⅳ was extremely significantly higher than that in group Ⅱ and Ⅲ (P>0.01), while no significant difference between group Ⅰ and Ⅳ (P>0.05). 2) Dietary n-6/n-3 PUFA ratio extremely significantly or significantly affected SFA, MUFA, PUFA, n-3 and n-6 contents in intramuscular fat (P<0.01 or P<0.05) in Arctic fox. SFA in intramuscular fat in group Ⅰ was significantly higher than that in group Ⅱ (P<0.05),while there were no significant difference among group Ⅰ,Ⅲ and Ⅳ (P>0.05). MUFA in intramuscular fat in group I was significantly higher than that in group Ⅲ and Ⅳ (P<0.05),while there was no significant difference between group Ⅰ and Ⅱ (P>0.05).PUFA in intramuscular fat in group Ⅱ was extremely significantly higher than that in group Ⅰ and Ⅳ (P<0.01), while there was no significant difference between group Ⅱ and Ⅲ (P>0.05). n-3 in intramuscular fat in group Ⅰ and Ⅲ were extremely significantly higher than that in group Ⅱ and Ⅳ (P<0.01). n-6 in intramuscular fat in group Ⅲ was extremely significantly higher than that in group Ⅰ and Ⅳ (P<0.01),while there was no significant difference between group Ⅲ and Ⅱ (P>0.05).Dietary n-6/n-3 PUFA ratio extremely significantly affected MUFA, PUFA, n-3 and n-6 contents in subcutaneous fat (P<0.01), but no significant effect on SFA (P>0.05). MUFA in subcutaneous fat in group Ⅰ was extremely significantly higher than that in group Ⅱ, Ⅲ and Ⅳ(P<0.01). PUFA in subcutaneous fat in group Ⅱ and Ⅲ was extremely significantly higher than that in group Ⅰ and Ⅳ(P<0.01). n-3 in subcutaneous fat in group Ⅰ and Ⅲ was extremely significantly higher than that in group Ⅱ and Ⅳ(P<0.01). n-6 in subcutaneous fat in group Ⅱ was extremely significantly higher than that in group Ⅰ and Ⅳ(P<0.01), while there was no significant difference between group Ⅱ and Ⅲ (P>0.05). 3) Dietary n-6/n-3 PUFA ratio significantly affected the serum HDL-C, LDL-C and complement 4(P<0.05), but no significant effect on serum TG,TC,GLU, IgA, IgM, IgG, complement 3, TNF and IL-2(P>0.05). Serum HDL-C in group Ⅰ was significantly higher than that in group Ⅱ, Ⅲ and Ⅳ (P<0.05). Serum LDL-C in group Ⅰ was significantly higher than that in group Ⅲ and Ⅳ(P<0.05),while there was no significant difference between group Ⅰ and Ⅱ(P>0.05).Serum C4 in group IV was significantly higher than that in group Ⅱ and Ⅲ(P<0.05),while there was no significant difference between group Ⅳ and Ⅰ (P>0.05). The ratio of n-6/n-3 PUFA is 41 (12% corn oil + 2% soybean oil),the hepatic somatic index is reduced,UFA in intramuscular fat and subcutaneous fat are mobilized,more SFA is deposed and serum lipid level is reduced,which make Arctic fox more healthy.

CLC Number:

ZHONG Wei, ZHANG Ting, LUO Jing, WANG Zhuo, YUE Zhi-gang, LIU Xue-qing, LI Guang-yu. Effects of Dietary n-6/n-3 PUFA Ratio on the Body Fat Deposition,Body Fatty Acid Composition and Serum Biochemical Parameters in Male Arctic Foxes during the Winter Fur-growing Period[J]. ACTA VETERINARIA ET ZOOTECHNICA SINICA, 2017, 48(6): 1054-1065.

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Effects of Dietary n-6/n-3 PUFA Ratio on the Body Fat Deposition,Body Fatty Acid Composition and Serum Biochemical Parameters in Male Arctic Foxes during the Winter Fur-growing Period

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