de Kock A C, Best P B, Cockcroft V, Bosma C
Catalysis Research Unit, Faculty of Applied Science, Port Elizabeth Technikon, South Africa.
Sci Total Environ. 1994 Sep 16;154(2-3):153-62. doi: 10.1016/0048-9697(94)90085-x.
Organochlorine pollutant levels in the blubber of small cetaceans and ratios between concentrations of compounds, such as DDE/tDDT and tDDT/PCB, were used to identify the chronology of input of DDT and PCB into the coastal waters along the west and east coasts of southern Africa. Although regression analyses, with time as the only independent variable, do not show a statistically significant decline in tDDT from 1980 to 1987 in the common dolphin from the east coast of South Africa, there is a fairly strong indication that tDDT concentrations did not increase or even stay constant with time. tDDT concentrations in the bottlenose dolphin declined significantly from 1980 to 1987 (P < 0.05). The regression analyses for PCB in the bottlenose dolphin from the east coast show no decline (P > 0.05). The data from this study illustrate that it would take a long time in the coastal waters and open ocean before the restriction and prohibition on the production and use of organochlorines will take effect.
小型鲸类动物鲸脂中的有机氯污染物水平以及化合物浓度之间的比率，如滴滴伊/总滴滴涕和总滴滴涕/多氯联苯，被用于确定滴滴涕和多氯联苯输入南部非洲东西海岸沿海水域的时间顺序。尽管以时间作为唯一自变量的回归分析并未显示1980年至1987年南非东海岸普通海豚体内的总滴滴涕有统计学意义的下降，但有相当有力的迹象表明总滴滴涕浓度并未随时间增加甚至保持不变。1980年至1987年宽吻海豚体内的总滴滴涕浓度显著下降（P<0.05）。对东海岸宽吻海豚体内多氯联苯的回归分析未显示下降（P>0.05）。这项研究的数据表明，在沿海水域和公海，有机氯生产和使用的限制及禁令生效还需要很长时间。
