黑斑原鮡对急性高温耐受性的研究  

Effects of high temperature stress on the lethality of fry and adult Glyptosternon maculatum

作　　者：曾荣俊 刘晓锐 耿庆宝 唐雪梅 方媛林 吴雷 张欢 顾正选 禹猛 ZENG Rongjun;LIU Xiaorui;GENG Qingbao;TANG Xuemei;FANG Yuanlin;WU Lei;ZHANG Huan;GU Zhengxuan;YU Meng(Zangmu Hydropower Plant,Huaneng Tibet Yarlung Zangbo Hydropower Development Investment Co.,Ltd.,Shannan 856400,China;Sichuan Aquabase Biotechnology Co.,Ltd.,Chengdu 610000,China;Wuhan Zhongke Ruihua Ecological Technology Co.,Ltd.,Wuhan 430077,China)

机构地区：[1]华能西藏雅鲁藏布江水电开发投资有限公司藏木水电厂,西藏山南856400 [2]四川律贝生物科技有限公司,四川成都610000 [3]武汉中科瑞华生态科技股份有限公司,湖北武汉430077

出　　处：《渔业研究》2024年第2期156-161,共6页Journal of Fisheries Research

基　　金：华能西藏雅鲁藏布江水电开发投资有限公司科研项目(JC2020/P07)。

摘　　要：为探究黑斑原鮡(Glyptosternon maculatum)鱼苗与成鱼对急性高温胁迫的耐受情况,本研究测定了鱼苗与成鱼在不同急性高温胁迫下的半致死时间,以及成鱼的呼吸频率。结果表明:黑斑原鮡鱼苗的半致死时间(LT_(50))随水温的升高而缩短,不同水温组的半数死亡时间存在显著差异(P<0.05),其中28℃组在13.53 h可达到半数死亡,24℃则为71.20 h;在高温胁迫下,成鱼的呼吸频率显著升高,24℃组的半致死时间(LT_(50))为15.60 h,远短于鱼苗在该水温下的半致死时间。急性高温胁迫下黑斑原鮡鱼苗的耐受能力强于成鱼,但两者均容易在短期内发生大量死亡,因此在养殖过程中应时刻关注水温的变化。In order to explore the tolerance of Glyptosternon maculatum to extreme temperatures at different stages,this study performed acute hyperthermic stress on the fry and adult fish,determined semi-lethal time at each temperature,and measured the respiratory rate of adult fish under hyperthermia.The results showed that the semi-lethal time(LT_(50))of fry G.maculatum shortened with the increase of temperature,and there was a significant difference in the LT_(50) of the different temperature groups(P<0.05),among which LT_(50) was 13.53 h at 28℃ and 71.20 h at 24℃.The respiratory rate of adult fish under high temperature stress increased significantly,and the semi-lethal time(LT_(50))of adult fish at 24℃ was 15.6 h,which was much lower than that of fry at this temperature.The results showed that there were differences in heat tolerance at different growth stages,and attention should be paid to water temperature control during the breeding process.The short-term lethal temperature of fry was 28℃,and the short-term lethal temperature of adult fish was 24℃.The results of this study can provide basic data for healthy breeding and further study of high temperature tolerance mechanism of G.maculatum.

关 键 词：黑斑原鮡 鱼苗 成鱼 急性高温胁迫 半致死时间 

分 类 号：S962[农业科学—水产养殖]