水产学报2018，Vol.42Issue(4)：565-574,10.DOI:10.11964/jfc.20170810947
大型溞的营养成分分析及其作为渔用饲料原料的潜在利用价值
Nutrient analysis and potential utilization value of Daphnia magna used as aqua-feed raw material
摘要
Abstract
A trial was conducted to determine nutrient composition and heavy metal content of dried Daphnia magna from artificial-cultivation pond in spring,summer,autumn,winter and eutrophic lake sewage in summer, aiming to assess potential utilization value in aqua-feed. The results showed that there was significant seasonal dif-ference in the moisture of artificial cultivated D.magna,and the highest was 5.14% in winter,and the lowest was 2.51% in summer.The moisture content(9.12%)of D.magna in summer sewage was significantly higher than that of artificial cultivation.The content of protein of artificially cultivated D.magna was 30.93%-50.21% with signi-ficant differences in different seasons, and in winter and summer sewage was significantly higher than that of oth-er groups. The total content of 15 amino acids determined markedly differed among groups, with the highest (36.65%) in winter and the lowest in summer (24.74%).In summer sewage, the amino acid content was 41.79%, and 9 essential amino acids accounted for 22.15%, lysine content reached 3.4 %, methionine 1.14 %, and threon-ine 2.45 %. The fat content was also significantly different with seasonal variation, the highest fat content was ob-served in winter (18.88%), while the lowest in autumn (4.19%), and no significant difference on the fat content was found in winter and summer sewage. The essential fatty acids were the highest in autumn and the summer sewage (17%)and the arachidonic acid and linolenic acid were not detected in all samples. The highest levels of heavy metal chromium, copper, zinc and lead appeared in summer sewage and artificial-cultivation pond in au-tumn, spring and summer, respectively, and no lead was detected in summer sewage and winter, no cadmium in all groups. Except for chromium, the lowest concentrations of copper, lead, arsenic and zinc were found in the sum-mer sewage.All the results indicated that the D.magna was rich in protein and fat with lower potential toxicity of heavy metals, and both the essential amino acid and essential fatty acid nutrient values in summer sewage were generally higher than those of artificial cultivation,so it is more feasible to use D.magna in summer sewage as the feed protein source.关键词
大型溞/资源化利用/营养成分/毒性Key words
Daphnia magna/resource utilization/nutrients/toxicity分类
农业科技引用本文复制引用
冯悦,黄仲园,华雪铭,何文辉,彭自然,蔡清洁,刘玉超..大型溞的营养成分分析及其作为渔用饲料原料的潜在利用价值[J].水产学报,2018,42(4):565-574,10.基金项目
水体污染控制与治理科技重大专项子课题(2014ZX07101-012-04)Subproject of the National Water Pollution Control and Treatment Science and Technology Major Project (2014ZX07101-012-04) （2014ZX07101-012-04）
