摘要
鲤鱼白肌中核糖核酸与脱氧核糖核酸的比值(RNA/DNA)可作为种群生长的生理指标,并用此指标预测和评价生态环境、饲养条件的优劣对其生长可能产生的影响。鱼体白肌中RNA/DAN值与其生长率呈正相关(r=0.8994);鱼体增重率和RNA/DNA值的季节变动规律基本一致,都是在9-10月最高,4月次之,11-12月最低。鲤鱼生长良好时,RNA/DNA值大于2.0;反之,低于2.0;Hg^(2+)浓度达到0.005mg/l时,才对鲤鱼的生长产生显著影响,并在RNA/DNA值上显示出来。用RNA/DNA值评价鱼的生产快慢。
The RNA/DNA ratios in white muscle of carp were determined byUV spectroscopy as a physiological index of growth rate. The index was possibly usedto evaluate the effect of ecological environment and feeding condition on the carpgrowth. The experimental results indicated that the RNA/DNA values in whitemuscle of carp were correlated with the change in growth rate (r=0.8994)or theincrease in fish weight. Moreover, the RNA/DNA ratio was the highest in autumn,the lowest in winter and the medium in spring and summer time. When the ratio valuswas over 2.0, it showed that carp grew well, otherwise grew badly. The growth rate ofthe fish was significantly affected if the concentration of mercuric ion (Hg^(++)) reached0.005 mg/l, and this effect might be detected by measuring the RNA/DNA ratios inwhite muscle of the fish through UV absorbance measurements.
出处
《上海水产大学学报》
CSCD
1992年第3期159-167,共9页
Journal of Shanghai Fisheries University
