^(14)C-DDT在鲮鱼中的积累与代谢

Accumulation and Metabolism of ^(14)C-DDT in Cirrhina molitorella

鲮鱼 Ｃｉｒｒｈｉｎａ ｍｏｌｉｔｏｒｅｌｌａ能迅速浓集水中的～（１４）Ｃ－ＤＤＴ．除鳍和内脏团外，其余各器官组织 的放射性活度在４ｈ～５ｄ达到浓集高峰，然后明显下降，并保持在相对稳定的水平．内脏团对～（１４）Ｃ－ＤＤＴ积累的比活度为肌肉的４．３倍，分别为２２１１６．５Ｂｑ·ｇ～（－１）和 ５ １８０．２ Ｂｑ·ｇ～（－１）．鳍和内脏团的积累变化很大，分别由峰值的１５ ４２２．０ Ｂｑ·ｇ～（－１）和 ２２ １１６．８ Ｂｑ·ｇ～（－１）下降到 ５ ０７２．３ Ｂｑ·ｇ～（－１）和５ ０７０．８Ｂｑ·ｇ～（－１）．共层析结果表明，在积累实验中，代谢物ＤＤＥ和 ＤＤＭＵ保持增加而 ＤＤＤ则下降．内脏团和剩余组织中８０％～９８％的～（１４）Ｃ－ＤＤＴ及其代谢物为可提取态．

Mud carp Cirrhina molitorella rapid accumulated ^(14)C-DDT in water, and after the peaks, the radioactivity declined obviously. ^(14)C-DDT accumulation peaks appeared at 4 h to 5 d, and then kept on a relative steady level except that of fin and viscera. The result showed that muscle was the least accumulating organ, and viscera, the most, with radioactivity of 5 180.2 Bq·g^(-1) and 22 116.5 Bp·g^(-1), respectively. But the radioactivity of fin and viscera fluctuated greatly, from the peak of 15422.2 Bq·g^(-1) and 22 116.8 Bq·g^(-1) to the valley of 5072.3 Bq·g^(-1) and 5070.8 Bq·g^(-1) re- spectively. Co-chromatography analysis found that during the experiment, DDE and DDMU were in an increasing trence of radioactivity, while DDD decreased. Moreover, most ^(14)C-compounds were ex- tractable in the body.