短期饥饿对大鳍鱯生化组成、氨基酸和脂肪酸组成的影响

Biochemical Composition,Amino Acid and Fatty Acid Composition of Mystus macropterus under Short-Term Starvation

在水温(21±1)℃条件下,研究了大鳍鱯(Mystus macropterus)在短期饥饿胁迫下生化组成、氨基酸和脂肪酸含量的变化。实验时间分别为饥饿0d(S0)、饥饿3d(S3)、饥饿6d(S6)、饥饿9d(S9)和饥饿12d(S12)。随着饥饿时间延长,水分显著升高(P<0.05),蛋白质、肝糖原和肌糖原显著降低(P<0.05),脂肪和灰分先显著降低(P<0.05),饥饿9d均出现回升(P<0.05)。氨基酸总量、必需氨基酸和非必需氨基酸含量均呈规则波动,饥饿12d均出现反弹现象,略高于实验起始值。饱和脂肪酸(SFA)呈先下降、后上升、再下降的趋势,单不饱和脂肪酸(MUFA)先上升后呈规则波动,多不饱和脂肪酸(PUFA)变化规律与饱和脂肪酸恰好相反,饥饿12d时仅高不饱和脂肪酸被保留,略高于实验起始值。双键位置不同的脂肪酸在饥饿过程中的损失速度也有差异,具体为∑n-9PUFA>∑n-3PUFA>∑n-6PUFA。

The contents of biochemical composition,amino acid and fatty acid composition were measured under 21±1℃ for Mystus macropterus in starvation for 0(S0),3(S3),6(S6),9(S9)and 12(S12)days as treatments.The content of moisture significantly increased(P<0.05),and that of protein,liver glycogen and muscle glycogen decreased with increasing starvation period(P<0.05).The contents of lipid and ash declined significantly within 6 days but thereafter increased significantly(P<0.05).The contents of total amino ...