| 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。 |
| 关键词: 石斑鱼 铜毒性 矿物质 |
| DOI：10.11693/hyhz201303010010 |
| 分类号: |
| 基金项目: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。 |
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| EFFECTS OF ELEVATED DIETARY COPPER LEVELS ON GROWTH AND Cu, Fe, Mn, Zn CONTENT OF JUVENILE GROUPER EPINEPHELUS COIOIDES |
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YE Chao-Xia1,2, LIU Yong-Jian2, TIAN Li-Xia2, YANG Hui-Jun2, WANG An-Li1, ZHOU Li-Bin3
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1.Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, College of Life Science, South China Normal University;2.School of Life Sciences, Sun Yat-sen University;3.Department of Life Science, Huizhou University
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| Abstract: |
| This study was conducted to investigate the effect of elevated dietary copper (Cu) level on growth performance, 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 1127.51mg/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. |
| Key words: Grouper Epinephelus coioides Copper toxicity Mineral |
