水体钙离子质量浓度对褐牙鲆幼鱼鱼体和耳石元素成分的影响  

Effects of Ca^(2+) concentrations in seawater on element content of fish body and otolith of juvenile Paralichthys olivaceus

作　　者：王茂林[1] 张秀梅[2] 高天翔[2] 张沛东[2] 

机构地区：[1]大连海洋大学农业部海洋水产增养殖学重点开放实验室,辽宁大连116023 [2]中国海洋大学海水养殖教育部重点实验室,山东青岛266003

出　　处：《南方水产科学》2013年第3期31-38,共8页South China Fisheries Science

基　　金：国家科技支撑计划项目(2006BAD09A15);大连海洋大学博士启动基金项目(SYYJ2009008)

摘　　要：在盐度30和水温20℃条件下,分别配制钙离子(Ca2+)质量浓度为200 mg·L-1(A组)、400 mg·L-1(B组,对照)、800 mg·L-1(C组)、1 600 mg·L-1(D组)和3 000 mg·L-1(E组)的人工海水,研究了水体ρ(Ca2+)对褐牙鲆(Paralichthys olivaceus)幼鱼鱼体和耳石元素成分的影响。经60 d养殖发现褐牙鲆鱼体中仅钙(Ca)、锌(Zn)和铜(Cu)质量分数差异不显著(P>0.05);鱼体中磷(P)、钠(Na)、镁(Mg)、锶(Sr)、铁(Fe)、锰(Mn)和镍(Ni)质量分数随水体ρ(Ca2+)的增加而下降。不同ρ(Ca2+)对褐牙鲆幼鱼耳石长、宽、长宽比和耳石质量影响显著(P<0.05)。低浓度A组耳石长和耳石宽显著低于B组和C组,A组耳石长宽比(L/W)显著低于D组,A组的耳石质量显著低于B组和D组(P<0.05)。其中w(Sr)随ρ(Ca2+)的增加显著下降,锶/钙(Sr/Ca)比、镁/钙(Mg/Ca)比随ρ(Ca2+)增加而下降。结果表明,水体ρ(Ca2+)对褐牙鲆鱼体成分、耳石形成及组分产生明显影响,ρ(Ca2+)能够影响鱼体和耳石元素的累积。We investigated the effects of Ca2＋ concentrations on element content of fish body and otolith of juvenile Paralichthys olivaceus that were raised at 20℃ in artificial seawater for 60 more days. Five groups of seawater with Ca2＋ concentrations 200 mg？L-1 （group A）, 400 mg？L-1 （group B, control）, 800 mg？L-1 （group C）, 1 600 mg？L-1 （group D）, and 3 000 mg？L-1 （group E）, were used for raise. It was found that with the increase of Ca2＋ concentration, the contents of P, Na, Mg, Sr, Fe, Mn and Ni in fish body decreased, and that Ca2＋ concentrations significantly influenced the otolith length, width, L/W and weight. Specifically, otolith length and width of juvenile P.olivaceus group A were significantly lower than that of group B and C; L/W was significantly lower than that of group D; and otolith weight was significantly lower than that of group B and D. Sr content of otolith, significantly, and the ratio of Sr/Ca and Mg/Ca also decreased with increasing concentration of Ca2＋. The results indicate that Ca2＋ concentrations affect juvenile P.olivaceus significantly in terms of its body and otolith element content formation, composition and accumulation.

关 键 词：褐牙鲆 钙离子 鱼体 耳石 元素 

分 类 号：S917[农业科学—水产科学]