摘要
在实验条件下比较了大型溞、隆线溞和方形网纹溞的若干生物学特征。3种溞的平均寿命甚接近,体长则以大型溞最大。方形网纹溞的第一次产溞年龄、蜕壳次数及产溞量略低于其他两种。分别计算了它们的体长增长和种群增长模型,其内禀增长率(r_m)分别为0.303、0.370、0.369;世代平均周期(T)分别为14.6、12.1、10.3。用Cr^(+6)、Cu^(+2)、Cd^(+2)、Zn^(+2)4种重金属离子对它们作48小时的急性毒性试验。3种溞的EC_(50)基本相似,且均对Cu^(+2)最敏感。实验结果认为,隆线溞和方形网纹溞既可作为测试生物,且更适于南方气候条件。
The biological characteristics of three species cladocerans, Daphnia magna, D. carinata and Ceriodaphnia quadrangula, were comparatively studied under experimental conditions. The longivity of these species are very close to one another. The age of first reproductive individuals of C. quadrangula is shorter and its number of molting and offsprings are lower than the former species for its small size. Models of the increment of body-length and the growth pattern of population are calculated. The intrinsic rate of increase (r_m) is 0.303, 0.370, 0.364, the mean length for a generation(T) is 14.6, 12,1, 10.3, respectively. Results of 48h acute toxic test with Cr^(+6), Cu^(+2), Cd^(+2), and Zn^(+2), for these daphnids show that their EC_(50) concentration are nearly the same, while Cu is the most toxic substance. It suggests that these daphnids are exchangeable when they are used as test animals in bioassay. However. D. carinata and C. quadrangula are more suitable in south due to their easier culture at room temperatures.
出处
《暨南大学学报（自然科学与医学版）》
CAS
CSCD
1991年第3期73-78,共6页
Journal of Jinan University(Natural Science & Medicine Edition)
基金
广东省自然科学基金
关键词
枝角类
毒性试验
大型蚤
隆线蚤
Cladocera, Daphnia magna, D. carinata, Ceriodaphnia quadrangula, Growth pattern of population, Acute toxic test
