Research was conducted on topmouth culter (Culter alburnus) grown in ponds and lakes as well as wild types in order to determine their chemical composition and nutritional value. There are three types of fish that dif...Research was conducted on topmouth culter (Culter alburnus) grown in ponds and lakes as well as wild types in order to determine their chemical composition and nutritional value. There are three types of fish that differ in their proximate composition, amino acids, fatty acids, and minerals. Wild fish had a significantly lower crude lipid contents than cultured fish (P P ∑PUFAs) showed an obviously opposite trend. As compared with cultured fish, wild fish had significantly higher levels of n-3 PUFAs, arachidonic acid (AA), eicosapentaenoic acid (EPA) and docosahxaenoic acid (DHA) (P P > 0.05), except for Na, Fe and Se. In conclusion, diet composition and external aqueous environment may determine the differences between wild and cultured topmouth culter.展开更多
在翘嘴鲌（Culter alburnus）鱼种基础饲料中添加相当于抗坏血酸含量为0mg／kg、25mg／kg、50mg／kg、100mg／kg、150mg／kg、200mg／kg和400mg／kg的包膜维生素C（Vc），制成7种实验饲料，饲养初始体质量为（3．71±0．11）g的7组...在翘嘴鲌（Culter alburnus）鱼种基础饲料中添加相当于抗坏血酸含量为0mg／kg、25mg／kg、50mg／kg、100mg／kg、150mg／kg、200mg／kg和400mg／kg的包膜维生素C（Vc），制成7种实验饲料，饲养初始体质量为（3．71±0．11）g的7组翘嘴鲌鱼种8周，每个实验组包含3个重复。结果表明，摄食不添加Vc饲料的实验鱼成活率显著低于其他Vc添加组（P〈0．05）。饲料中Vc添加量为0-50mg／kg时，对鱼体增重有显著影响（P〈0．05），鱼体增重随添加量的增加而上升。但添加量继续增大，对鱼体增重不再有显著影响（P〉0．05）。饲料中维生素C添加量为。和25mg／kg时，饲料效率和蛋白质效率低于其他各组（P〈0．05）。试验饲料中Vc不同添加量对肝体指数和全鱼体成分无显著影响（P〉0．05）。肌肉中抗坏血酸含量随饲料中Vc添加量加大而不断上升，二者呈正相关关系（P〈0．05）。肝胰脏抗坏血酸含量在Vc添加量≤100mg／kg时，随饲料中Vc添加量加大而不断上升（P〈0．05），但高于此添加量时，则肝胰脏中抗坏血酸不再随添加量的上升而有显著变化（P〉0．05）。分别以鱼体增质量和肝胰脏中抗坏血酸为指标，经折线模型（Broken line model）回归分析求得翘嘴铂鱼种饲料中Vc的适宜添加量分别为53mg／kg和97mg／kg。展开更多
文摘Research was conducted on topmouth culter (Culter alburnus) grown in ponds and lakes as well as wild types in order to determine their chemical composition and nutritional value. There are three types of fish that differ in their proximate composition, amino acids, fatty acids, and minerals. Wild fish had a significantly lower crude lipid contents than cultured fish (P P ∑PUFAs) showed an obviously opposite trend. As compared with cultured fish, wild fish had significantly higher levels of n-3 PUFAs, arachidonic acid (AA), eicosapentaenoic acid (EPA) and docosahxaenoic acid (DHA) (P P > 0.05), except for Na, Fe and Se. In conclusion, diet composition and external aqueous environment may determine the differences between wild and cultured topmouth culter.
文摘在翘嘴鲌（Culter alburnus）鱼种基础饲料中添加相当于抗坏血酸含量为0mg／kg、25mg／kg、50mg／kg、100mg／kg、150mg／kg、200mg／kg和400mg／kg的包膜维生素C（Vc），制成7种实验饲料，饲养初始体质量为（3．71±0．11）g的7组翘嘴鲌鱼种8周，每个实验组包含3个重复。结果表明，摄食不添加Vc饲料的实验鱼成活率显著低于其他Vc添加组（P〈0．05）。饲料中Vc添加量为0-50mg／kg时，对鱼体增重有显著影响（P〈0．05），鱼体增重随添加量的增加而上升。但添加量继续增大，对鱼体增重不再有显著影响（P〉0．05）。饲料中维生素C添加量为。和25mg／kg时，饲料效率和蛋白质效率低于其他各组（P〈0．05）。试验饲料中Vc不同添加量对肝体指数和全鱼体成分无显著影响（P〉0．05）。肌肉中抗坏血酸含量随饲料中Vc添加量加大而不断上升，二者呈正相关关系（P〈0．05）。肝胰脏抗坏血酸含量在Vc添加量≤100mg／kg时，随饲料中Vc添加量加大而不断上升（P〈0．05），但高于此添加量时，则肝胰脏中抗坏血酸不再随添加量的上升而有显著变化（P〉0．05）。分别以鱼体增质量和肝胰脏中抗坏血酸为指标，经折线模型（Broken line model）回归分析求得翘嘴铂鱼种饲料中Vc的适宜添加量分别为53mg／kg和97mg／kg。
