水生生物学报2018，Vol.42Issue(3)：578-583,6.DOI:10.7541/2018.072
温度、pH和盐度对后背鲈鲤幼鱼存活的影响
EFFECTS OF TEMPERATURE, pH AND SALINITY ON THE SURVIVAL OF JUVENILE PERCOCYPRIS PINGI RETRODORSLIS
摘要
Abstract
To study the tolerance of Percocypris pingi retrodorslis to temperature,pH,and salinity,the juvenile Per-cocypris pingi retrodorslis were used as experimental objects.A single factor static acute toxicity test was used to study their tolerance to temperature, pH and salinity. The experimental results showed that their tolerance on temperature ranged from 0 to 32℃, and the lethal high and low temperature was 32℃ and 1℃, respectively. The optimum growth temperature was between 8 and 27℃. In addition, the optimum growth pH was 5.0—9.0. However, the juvenile fish began to die when pH was higher than 9.5 or lower than 4.7 (within 96h after treatment). The effects of different alka-linity on the survival of juvenile fish have significant difference (P<0.05), after the treatment for 24h, 48h, 72h and 96h, but there was no significant difference effects on the survival at different acidity level(P>0.05).The LC50of acidity for the juvenile fish was 3.90,3.96,4.15 and 4.40 after treated for 24h,48h,72h and 96h,respectively.The LC50of alkali-nity was 11.20, 11.10, 10.98 and 10.89 after the treatment of 24h, 48h, 72h and 96h, respectively. The juvenile fish began to die when salinity was higher than 7.5, and the effects of different salinity on the survival of juvenile fish were significantly different(P<0.05).The LC50of salinity for juvenile fish was 10.30,9.25,9,8.85 and 8.82 g/L at 12h,24h, 48h, 72h and 96h after treatment, respectively, and two safe concentration (SC) levels were 0.89 g/L and 2.385 g/L. The Percocypris pingi retrodorslis has been listed as endangered species,and our data will provide a theoretical foundation for the artificial breeding and trans regional breeding of Percocypris pingi retrodorslis.关键词
后背鲈鲤/温度/pH/盐度/耐受性Key words
Percocypris pingi retrodorslis/Temperature/pH/Salinity/Tolerance分类
农业科技引用本文复制引用
金方彭,李光华,李林,秦鑫,李坤,吴俊颉,高海涛,夏一丹,刘峰..温度、pH和盐度对后背鲈鲤幼鱼存活的影响[J].水生生物学报,2018,42(3):578-583,6.基金项目
华能澜沧江水电股份有限公司科研基金项目(HY2012/P21-C)资助[Supported by the Scientific Research Fund Project of Huaneng Lancang River Hydropower Incorporated Company] （HY2012/P21-C）
