韩江下游赤眼鳟幼鱼鱼体的化学组成及能量密度的研究  

The chemical composition and energy density of juvenile Squaliobarbus curriculus in the lower reaches of Hanjiang river

作　　者：林小植[1] 陈蔚辉[1] 范汉金[1] 罗毅平[2] 查广才[1] 

机构地区：[1]韩山师范学院生物系,广东潮州521041 [2]西南大学生命科学学院,淡水生物生殖与发育教育部重点实验室,重庆400715

出　　处：《淡水渔业》2011年第2期25-29,共5页Freshwater Fisheries

基　　金：国家自然科学基金资助项目(31000958);韩山师范学院青年项目(LQ200904);潮州市2010年科技引导计划项目(2010N12)

摘　　要：2010年6月在潮州江段采集赤眼鳟(Squaliobarbus curriculus)幼鱼36尾,按体长范围(68～175 mm)分为5个组,测定鱼体化学组成,估算其能量密度。结果显示:赤眼鳟含水量、蛋白质含量、脂肪含量、灰分含量占鲜重的百分比范围为72.79%～75.54%、12.99%～17.06%、8.18%～12.88%和2.35%～3.38%,能量密度范围为6.29～9.11kJ/g;蛋白质含量、脂肪含量和能量密度均随体长增加而增加,含水量呈下降趋势。体长与蛋白质含量、脂肪含量、能量密度呈显著的正线性关系,而与含水量呈负线性相关关系(P<0.05);含水量与蛋白质含量、脂肪含量、能量密度呈显著的负线性关系(P<0.05)。结果表明可以用赤眼鳟的含水量及体长估计其蛋白质含量、脂肪含量和能量密度,赤眼鳟较高的脂肪含量与韩江中丰富的食物资源及赤眼鳟适应缓流水生活的习性有关。To observe the variation of body composition of Squaliobarbus curriculus,36 specimens with body length of 68～175 mm and body weight of 4.78～104.88 g were collected from the lower reaches of Hanjiang river in June,2010,and divided into 5 groups according to the body length（L）.Chemical compositions and energy density were measured.The results showed that the contents of water（WAT）,protein（PRO）,lipid（FAT） and ash（represented by percentages of them in fresh body weight of fish,respectively） ranged 72.79%～75.54%,12.99%～17.06%,8.18%～12.88% and 2.35%～3.38% respectively.The energy density（E） ranged 6.29～9.11 kJ/g.With the increase of L,PRO,FAT and E,WAT decreased.PRO,FAT and E were all positively correlated with L,while WAT was negatively correlated with L（P〈0.05）.The contents of PRO,FAT and E were all negatively correlated with the content of WAT（P〈0.05）.The results suggested that the contents of PRO,FAT and E of S.curriculus could be estimated by the content of water or body size.The high content of lipid with the increasing body size in this species may be resulted from its acclimation to the slow flow water environment and abundant food resources.

关 键 词：韩江 赤眼鳟(Squaliobarbus curriculus) 体长 化学组成 能量密度 

分 类 号：Q413[生物学—生理学]