摘要
研究了小型鱼类麦穗鱼(Pseudorasbora parva)对盐度和酸碱度的耐受性.结果表明,24、48、72和96 h其盐度的LC50分别为11.668、11.428、11.376和11.246g/L;其酸度的LC50分别为9.02×10-5、7.21×10-5、4.37×10-5和2.88×10-5 mol/L,相应的pH分别为4.05、4.14、4.36和4.54;其碱度的LC50分别为5.50×10-4、3.80×10-4、3.48×10-4和2.95× 10-4 mol/L,相应的pH分别为10.74、10.58、10.54和10.47.结果提示,麦穗鱼属于狭盐性鱼类,其适宜生存的酸碱度范围(pH 5.5～9.5)大于黄鳝等种类,但小于鲤鱼等种类.
Abstract
The tolerance of salinity, pH was investigated in Pseudorasbora parva. In 24, 48, 72 and 96 h, results showed that the salinity LC50 of Pseudorasbora parva were 11.668, 11.428, 11.376 and 11.246 g/L, respectively; The acidity LC50 were 9.02xl0-5, 7.21X10-5, 4.37x10-5 and 2.88x10-5 mol/L corresponding to the pH 4.05, 4.14, 4.36 and 4.54, respectively; The alkalinity LC50 were 5.50x10-4, 3.80x10-4, 3.48x10-4 and 2.95x10-4 mol/L corresponding to the pH 10.74, 10.58, 10.54 and 10.47, respectively. The results indicated that Pseudorasbora parva is a stenohaline fish, and the pH range (pH 5.5~9.5) suitable for the survival of Pseudorasbora parva was more than that of the ricefield eel (Monopterus albus) and so on, but less than that of the carp(Cyprinus carpio) and so on.
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