化学诱变剂在实验海洋食物链中的流动以及遗传毒性的检测——镉在褐指藻→中国对虾→欧氏六线鱼实验食物链中的传递

FLUX OF CHEMICAL MUTAGENS THROUGH AN EXPERIMENTAL MARINE FOOD CHAIN AND THEIR GENOTOXICITY——TRANSFER OF CADMIUM IN THE LAB FOOD CHAIN PHAEODACTYLUM TRICORNUTUM→PENAEUS CHINENSIS→HEXAGRAMM OS OTAKII

于1989年3月—1989年9月,利用极谱测定法研究了无机诱变剂Cd在3级实验食物(链从褐指藻经中国对虾至欧氏六线鱼)中的传递,并对积累Cd的中国对虾和欧氏六线鱼肌肉和内脏灰样进行了紫露草微核测定。结果表明,Cd浓度在传递中依次减少;经过6d喂食,Cd从褐指藻到中国对虾的传递比例为66.6％;经过7d喂食,Cd从中国对虾到欧氏六线鱼的传递比例为29.9％。t测验发现,处理组对虾内脏灰样与肌肉灰样之间诱变性差异显著(P<0.01);处理组与对照组对虾内脏灰样之间的诱变性差异亦显著(P<0.01)。

In order to investigate the flux of cadmium, the inorganic mutagen through 3-trophic level marine food chains and the harm it might do to human health, we deviced a phytoplankton based experimental marine food chain (from Phaeodactylum tricornutum Bohlin to the prawn Penaeus chinensis Osbeck, and to the fish Hexagrammos otokii Jordan et Starks) and studied its flux using polarography analysis from Mar., 1989 to Sep. 1989. Genotoxicity of ashed part of cadmium contaminated prawns and fish was determined by a Trad-MCN test. The results are as follows:Cadmium concentration decreased in the transfers from P. tricornutum to P. chinensis and from the latter to H. otakii. The transfer coefficient of cadmium in the first flux (six days of feeding) was 66.6% and in the second (seven days of feeding) was 29.9%.t tests showed mutagenicity of ashed internal organs of experimental prawns was significantly higher than that of ashed muscles, and also significantly higher than that of ashed internal organs of the controls (P<0.01).