摘要
为探究淇河鲫幼鱼对碱度的耐受性能,本研究采用急性碱度胁迫法,利用NaHCO3配制不同浓度的碳酸盐碱水,对两种规格的幼鱼进行碱度耐受性实验.两种规格淇河鲫幼鱼的初始体重、体长分别为:规格 Ⅰ(1.02±0.16 g;3.35±0.16 cm)、规格 Ⅱ(2.84±0.08 g;5.15±0.12 cm).结果显示,规格 Ⅰ 淇河鲫幼鱼 24、36、48、72 和 96 h 的碱度半致死浓度(LC50)分别为 107.28、100.21、92.73、88.52 和 85.56 mmol/L;规格Ⅱ淇河鲫幼鱼的LC50分别为139.33、119.48、115.36、110.42和107.91 mmol/L.两种规格幼鱼的安全浓度(SC)分别为20.79和23.40 mmol/L.结果表明,淇河鲫幼鱼对碱度胁迫具有较强的耐受性,不同规格淇河鲫的碱度耐受能力大小顺序为规格Ⅱ＞规格Ⅰ.本研究结果为淇河鲫盐碱选育和盐碱水养殖提供了理论依据.
Abstract
In order to investigate the alkalinity tolerance of juvenile Qihe crucian carp Carassius auratus,the acute alkalinity stress experiment was carried out by using NaHCO3 solutions with various concentrations on two sizes of juvenile fish.The initial weight and body length of the juvenile fish in Size Ⅰ were(1.02±0.16)g and(3.35±0.16)cm,while those in Size Ⅱ were(2.84±0.08)g and(5.15±0.12)cm.The results showed that the alkalinity semi-lethal concentrations(LC50)of juvenile fish in Size Ⅰ at 24,36,48,72 and 96 h were 107.28,100.21,92.73,88.52 and 85.56 mmol/L,respectively;while in Size Ⅱ,the LC50 values were 139.33,119.48,115.36,110.42 and 107.91 mmol/L,respectively.The safe concentrations(SC)for the two different sizes of juvenile fish were 20.79 and 23.40 mmol/L,respectively.The findings suggested that Qihe crucian carp juveniles exhibited strong tolerance to alkalinity stress,with Size Ⅱ showing higher tolerance compared to size Ⅰ.The results of this study provided a theoretical basis for the salt-alkali breeding and aquaculture of Qihe crucian carp.
维普
万方数据