罗非鱼6个家系的低温耐寒测定分析  

Analysis of Cold Tolerance Measure at Low-temperature in Six Tilapia Families

作　　者：卢其西[1,2] 林勇[1] 宾石玉[2] 唐章生[1] 彭婷[3] 

机构地区：[1]广西水产研究所,广西南宁530021 [2]广西师范大学生命科学学院,广西桂林541004 [3]广西大学动物科学与技术学院,广西南宁530004

出　　处：《广西师范大学学报（自然科学版）》2011年第2期104-109,共6页Journal of Guangxi Normal University:Natural Science Edition

基　　金：国家科技支撑计划课题(2008BADB9B02);广西自然科学基金资助项目(0832010Z);广西壮族自治区公益性科研院所专项基金资助项目(2060302)

摘　　要：为研究美国品系奥利亚罗非鱼6个家系的耐寒能力,应用室内人工降温,以0.3°C/3 h的降温方法,测定罗非鱼的半致死低温(LT50值)和低温累计存活小时数(CDH)等耐寒指标。结果表明,6个罗非鱼家系的LT50值依次是:5.80、5.70、5.80、5.83、6.00、5.80°C;CDH值依次是:1 102.50、1 130.67、1 113.00、1 092.10、1 047.03、1 092.10 h。通过对LT50值和CDH值进行相关性分析和多重比较,6个家系中,家系Ⅴ的LT50值和CDH值与其他家系有显著差异(P<0.01),表明其耐寒能力相对较弱,而其余各家系间的LT50值和CDH值的差异不显著(P>0.05);6个家系罗非鱼的耐寒能力均得到稳定遗传和增强。The study was done to assess the cold hardy capacity in 6 families of U. S. strains tilapia Oreochromis aureus. In the condition of indoor artificial cooling,with 0. 3 ℃/3 h cooling method,calculated the semi-lethal low-temperature （LT50）,lethal temperature and cooling degree hours （CDH） for each tilapia family to assess the cold tolerance of each family. The results showed that the LT50 values of the six families：5.80.5. 70.5.80,5.83.6.00.5.80 ℃ and the CDH values are：1 102.50.1 130. 67.1 113.00, 1 092.10.1 047.03, 1 092.10 h. The correlation analysis and multiple comparisons among LT50 values and CDH values showed that family V were significant differences among with other families,which means that its cold hardy capacity is relatively weaker than the other families,while the LT50 values and CDH values of the rest families showed no statistical difference among themselves. The cold hardy capacity of the 6 families have been inherited stably and enhanced.

关 键 词：罗非鱼 家系 半致死低温 低温累计存活小时数 耐寒能力 

分 类 号：S917.4[农业科学—水产科学]