中国水产科学2017，Vol.24Issue(2)：248-257,10.DOI:10.3724/SP.J.1118.2017.16151
三种鳅科鱼对NaCl盐度和NaHCO3碱度的耐受能力
Tolerance of three Cobitidae fish species to high salinity and alkalinity
摘要
Abstract
Saline-alkaline water resources are plentiful in China, but fisheries production in these waters is relatively low due to the lack of suitable culture species adapted to different saline-alkaline water characteristics.Triplophysa dalaica(Order Cypriniformes and Family Cobitidae) lives in Dali Lake where salinity reaches 6% and alkalinity is as high as 53.57 mmol/L. This species has a high tolerance to high salinity and alkalinity and could be a good aquaculture species for high salinity-alkalinity water. However, little is known about the tolerance limits of cobitid fish compared with those of other freshwater fish species. Thus, the tolerance of three cobitid fish species, such as Misgurnus mohoity Dybowsky,Paramisgurnus dabryanus Sauvage, and T. dalaica, to salinity and alkalinity were investigated by 96 h one-way acute toxicity tests and a uniform orthogonal test in this study. The results showed that the 24 h- and 96 h-LC50 values for salinity in M. mohoity,P. dabryanus, and T. dalaicawere 15.64 g/L, 13.58 g/L, and 15.43 g/L and 14.18 g/L, 14.00 g/L, and 11.57 g/L, respectively, with safe concentrations of 4.12 g/L, 4.03 g/L, and 3.74 g/L respectively. The degree of salinity tolerance was M. mohoity>P. dabryanus>T. dalaica.The 24 h- and 96 h-LC50 values for carbonate-alkalinity in M. mohoity,P. dabryanus, and T. dalaicawere 117.1 mmol/L, 72.62 mmol/L, and 128.4 mmol/L and 88.83 mmol/L, 155.2 mmol/L, and 120.0 mmol/L, respectively, with safe concentrations of 18.77 mmol/L, 23.66 mmol/L, and 36.30 mmol/L respectively. The degree of carbonate-alkalinity tolerance was T. dalaica>P. dabryanus>M. mohoity. The joint effect of salinity and alkalinity was coordinated in M. mohoity and P. dabryanus, and the coordination coeffi-cients increased first and then decreased, but reached the maximum at 48 h. However, the combined effect was coordi-nated within 0-48 h in T. dalaica,whereas it was antagonized during 48–96 h, and the coefficient of antagonism in-creased gradually with exposure time. These results provide a theoretical basis for promoting breeding and culture of cobitid fish in high salinity-alkalinity water in the future.关键词
黑龙江泥鳅/大鳞副泥鳅/达里湖高原鳅/鳅科/盐度/碱度/耐受能力Key words
Misgurnus mohoity Dybowsky/Paramisgurnus dabryanus Sauvage/Triplophysa dalaica/Cobitidae/salinity/alkalinity/tolerance分类
农业科技引用本文复制引用
武鹏飞,耿龙武,姜海峰,佟广香,李晨宇,徐伟..三种鳅科鱼对NaCl盐度和NaHCO3碱度的耐受能力[J].中国水产科学,2017,24(2):248-257,10.基金项目
"十二五"科技支撑计划项目(2012BAD25B09) （2012BAD25B09）
哈尔滨市科技攻关计划项目(2012AA6CN037) （2012AA6CN037）
中央级公益性科研院所基本科研业务费专项(HSY201403) （HSY201403）
中国水产科学研究院基本科研业务费资助项目(2016ZD0602). （2016ZD0602）
