不同养殖模式下2个群体大口黑鲈肌肉营养成分比较

为评价不同遗传背景群体与养殖模式对大口黑鲈(Micropterus salmoides)肌肉营养成分的影响,优化养殖组合并引导消费,实验选择2个鲈鱼苗种群体为材料,搭配2种模式,设定4个组,经8个月养殖后,按国标法检测各组样本肌肉营养成分并进行分析。结果显示,C组肌肉含水量显著低于其他组(P<0.05),粗蛋白含量显著高于其他组(P<0.05)。B组ΣTAA、ΣEAA、ƩNEAA、ΣHEAA、ΣDAA、ΣEAA/ΣNEAA等指标均显著高于其他组(P<0.05);B、C、D组各样本ΣEAA/ΣTAA值差异不显著(P>0.05),但B组ΣEAA/ΣTAA值显著高于A组(P<0.05);各组之间的ΣDAA/ΣTAA值无显著差异(P>0.05)。A组样本共获得16种脂肪酸含量数据,B和C组分别获得13种脂肪酸含量数据,D组获得12种脂肪酸含量数据;B组SFA、MUFA、EPA+DHA、PUFA、UPA、FA等指标均显著高于其他实验组(P<0.05),只有UFA/SFA这一指标显著低于C和D组(P<0.05),但与A组差异不显著(P>0.05)。各组所测得4种常量元素中K含量最高,且B组的含量(4239.33 mg/kg)显著高于其他各组(P<0.05);Na含量次之,且B组的含量(306.87 mg/kg)显著低于其他各组(P<0.05)。综上,池塘工程化循环水槽养殖的YL3产品有一定的蛋白质积累优势;传统池塘养殖TL的产品有一定的氨基酸和脂肪酸含量优势,并具有较高的钾钠比。

Comparison of Muscle Nutritional Components of Micropterus salmoides from 2 Populations Under Different Culture Modes

In order to evaluate the effects of different culture modes on muscle nutritional components of Micropterus salmoides from 2 genetic background populations comprehensively, and to optimize breeding combination and guide consumption, 2 progeny populations of Micropterus salmoides were selected as experimental materials, combined with 2 breeding modes, and then 4 experimental groups were set up. After 8 months of culture, the nutritional components in the back muscle of M. salmoides of each experimental group were detected and analyzed according to the national standard method. The results showed that, the muscle water content of group C was significantly lower than that of other groups (P<0.05), and the crude protein content of group C was significantly higher than that of other groups (P<0.05). ΣTAA, ΣEAA, ΣNEAA, ΣHEAA, ΣDAA and ΣEAA/ΣNEAA of group B were significantly higher than those of other groups (P<0.05). There was no significant difference in the ΣEAA/ΣTAA values among group B, C and D (P>0.05), but the ΣEAA/ΣTAA value of group B was significantly higher than that of group A (P<0.05). There was no significant difference in the ΣDAA/ΣTAA values among all the groups (P>0.05). The content data of 16 fatty acids, 13 fatty acids, 13 fatty acids and 12 fatty acids were obtained from group A, B, C and D respectively; the contents of SFA, MUFA, EPA+DHA, PUFA, UPA and FA in group B were significantly higher than those in other experimental groups (P<0.05), only UFA/SFA in group B was significantly lower than that in group C and D (P<0.05), but there was no significant difference between group B and A (P>0.05). The content of K was the highest among the four macroelements detected in the experimental groups, in addition, it was significantly higher in group B (4239.33 mg/kg) than that in other groups (P<0.05); the content of Na was second only to that of K, and it was significantly lower in group B (306.87 mg/kg) than that in other groups (P<0.05). In summary, the experiment showed that the fish products obtained from the YL3 breeding in flume recirculating aquaculture mode had a certain advantage of protein accumulation; the fish products obtained from the TL breeding in traditional pond mode had higher content of amino acids and fatty acids, and relatively high ratio of K/Na.