滩头雅罗鱼幼鱼对NaCl浓度和碱度的适应性分析  

Adaptability of Tribolodon brandti(Dybowski) to NaCl concentration and alkalinity

作　　者：池炳杰[1,2] 梁利群[1] 刘春雷[1,2] 常玉梅[1] 王山[1] 韩启霞[1,2] 高国强[1,2] 

机构地区：[1]中国水产科学研究院黑龙江水产研究所,黑龙江哈尔滨150070 [2]上海海洋大学生命与水产学院,上海201306

出　　处：《中国水产科学》2011年第3期689-694,共6页Journal of Fishery Sciences of China

基　　金：国家863计划项目(2007AA10Z186)

摘　　要：为了解滩头雅罗鱼[Tribolodon brandti（Dybowski）]对NaCl浓度、碱突变的适应能力，在水温为22～25℃，采用单因子静态急性毒性实验法对滩头雅罗鱼3月龄幼鱼进行NaCl、碱适应性研究。结果表明，在pH7．3~0．2、碱度1．11mmol／L时，NaCl浓度对实验鱼12h、24h、48h和96h的半致死浓度（LC50）值分别为28．81g／L、28．57g／L、28．51g／L和28．40g／L，安全值（sc）为8．52g／L。在pH8．5士0．5时、NaCl浓度为3．1～7．4g／L时，碱度对实验鱼12h、24h、48h、72h和96h的LC50分别为98．79mmol／L、89．31mmol／L、79．34mmol／L、78．45mmol／L和68．44m~ol／L，安全值为18．79mmol／L。本研究旨在为滩头雅罗鱼盐碱池塘养殖推广和野生种群种质资源的保护提供基础数据。Tribolodon brandti （Dybowski） belongs to Cypriniformes, Cyprinidae and Tribolodon, which is an especially economic fish. The mature fish migrate into freshwater river of the Suifen River and the Tumen River, from Japan Sea for spawning. Recent years, the spawning environment of T. brandti has been changed because of decreased vegetation fraction, accelerated soil erosion and increased river turbidity. Besides, poaching and heavy fishing in spawning season further caused sharp reduce of the number of spawning group year by year. So, it is urgent to protect this precious fish. However, studies on T. brandti mainly focused on artificial propagation, re- productive group structure, embryo, population genetic relationship and so on. The effect of water ecological fac- tors on this fish has not been reported yet. In order to understand adaptability of this fish to salinity and carbonate-alkalinity, the toxicity of these two ecological factors in water to T. brandti was studied. Acute toxicity was determined under water temperatures ranging from 22 ℃ to 25 ℃ by one-way toxicity test. The results showed that when alkalinity was 1.11 mmol/L with pH 7.3±0.2, the LC50s of NaC1 concentration to T. brandti were 28.81 g/L, 28.57 g/L, 28.51 g/L and 28.40 g/L at 12 h, 24 h, 48 h and 96 h, respectively. And the safe NaC1 concentration was 8.52 g/L. At pH 8.5±0.5 with NaC1 concentration of 3.1-7.4 g/L, the LCs0s of carbonate-alkalinity to T. brandti were 98.79 mmol/L, 89.31 mmol/L, 79.34 mmol/L, 78.45 mmol/L and 68.44 mmol/L at 12 h, 24 h, 48 h, 72 h and 96 h, respectively, and the safe alkalinity was 18.79 mmol/L. These result provided basic data to T. brandti for alkalind land pond culture and germplasm resources protected.

关 键 词：滩头雅罗鱼 NaCl浓度 碱度 适应性 

分 类 号：S917[农业科学—水产科学]