中国水产科学2011，Vol.18Issue(3)：689-694,6.DOI:10.3724/SP.J.1118.2011.00689
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 NaCI concentration and alkalinity
摘要
Abstract
Tribolodon brandti (Dybowski) belongs to Cypriniformes, Cyprinidae and Tribolodon, which is an es pecially 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, reproductive group structure, embryo, population genetic relationship and so on.The effect of water ecological factors 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 NaCl concentration was 8.52 g/L.At pH 8.5±0.5 with NaCl concentration of 3.1-7.4 g/L, the LC50s 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Key words
Tribolodon brandti (Dybowski)/ NaC1 concentration/ alkalinity/ adaptability分类
农业科技引用本文复制引用
池炳杰,梁利群,刘春雷,常玉梅,王山,韩启霞,高国强..滩头雅罗鱼幼鱼对NaCl浓度和碱度的适应性分析[J].中国水产科学,2011,18(3):689-694,6.基金项目
国家863计划项目(2007AA10Z186). （2007AA10Z186）
