摘要
采用铜适量(4.47mg/kg)和铜过量(1127.51mg/kg)的两种饲料投喂初始体重为(12.9±0.2)g的斜带石斑鱼(Epinephelus coioides)8周,研究饲料中过量铜对斜带石斑鱼生长性能、形态学指标、体组成和鱼体微量元素含量的影响。结果表明,当饲料铜含量由4.47mg/kg升高到1127.51mg/kg时,斜带石斑鱼增重率由228%下降到63%,饲料效率由1.12下降到0.51,肠脂比由2.90%下降到1.69%。全鱼和肝脏中的铜含量均随饲料铜水平的增加而显著增加,斜带石斑鱼全鱼铜含量由2.98mg/kg上升到34.98mg/kg,肝脏铜含量由36.6mg/kg上升到1364.0mg/kg。但饲料中过量铜对斜带石斑鱼的存活率、鱼体肥满度、脏体比、肝体比和全鱼体组成没有显著性影响。摄食高铜饲料的斜带石斑鱼肝脏锌含量显著升高,锌可能在铜的解毒过程中起着重要的作用。
This study was conducted to investigate the effect of elevated dietary copper （Cu） level on growth perform-ance, feed utilization, morphological indicators, carcass composition and Cu, Fe, Mn and Zn content of juvenile grouper, Epinephelus coioides. Two diets containing 4.47mg/kg and 1127.51mg/kg Cu respectively were fed to juvenile grouper with an initial weight of （12.9 ± 0.2）g for 8 weeks. When dietary Cu increased from 4.47mg/kg to 1127.5 l mg/kg, weight gain of grouper dropped significantly from 228% to 63%, feed efficiency from 1.12 to 0.51, mesenteric fat index from 2.90% to 1.69%. Cu content of whole body and liver increased significantly with dietary Cu increment. Cu content of whole body increased significantly from 2.98mg/kg to 34.98mg/kg, and liver Cu content increased significantly from 36.6mg/kg to 1364.0mg/kg. Elevated dietary Cu showed no significant effect on survival, condition factor, viscera somatic index, hepato somatic index and carcass composition of juvenile grouper. Grouper fed diets with 1127.51mg/kg Cu had significantly higher liver Zn content than those fed diets with 4.47mg/kg Cu, which indicates Zn might play an important role in Cu detoxification.
出处
《海洋与湖沼》
CAS
CSCD
北大核心
2013年第3期606-610,共5页
Oceanologia Et Limnologia Sinica
基金
国家科技支撑计划项目
2007BAD29B04号
国家自然科学基金项目
31100296号
广东省重点实验室建设项目
2009A060800019号
广东省自然科学基金项目
SZ2011010005079号
惠州市科技计划项目
2011B040010003号
关键词
石斑鱼
铜毒性
矿物质
Grouper Epinephelus coioides
Copper toxicity
Mineral
