摘要
^(134)Cs在水相生态系中以指数回归形式消长;水生动物对^(134)Cs的吸收可分为两个阶段,前期吸收较快,后期较慢。蝌蚪(Larva of Rana esculenta L.)对^(134)Cs的吸收速率最快,草鱼(Ctenoparyn-godon idellus)和鳝鱼(Fluta alba)居中,螺蛳(Bellamya purificata)和黄蚬(Corbicula sandaiR.)较慢;水生动物对^(134)Cs的富集系数(K)与时间(t)成简单的直线关系,富集系数的顺序为蝌蚪>螺蛳>黄蚬>草鱼>青蛙>鳝鱼;青蛙主要通过消化系统摄取水体中的^(134)Cs,经血液循环运输到各器官中。
Cs-134 in aqueous ecosystem grows and declines exponentially. The absorption of cesium-134 by aquatic animals can be divided into two stages. It is faster in the earlier stage than in the later stage. Comparing the absorption rate of cesium-134 in five aquatic animals studied, the fastest is in Larva of Rana esculenta L., the slowest in Bellamya purificata and Cor-bicula sandai R., and mediate in Ctenopharyngodon idellus and Fluta abla. The concentration factor of cesium-134 (K ) in aquatic animals presents a simple linear relation with time ( t) . The orders of K are as follows, tadpole>spiral shell>river clam>grass carp>frog>ricefield ell. Frog absorbs Cs-134 from water phase mainly through the digestive system. Cesium-134 is translocated by blood circulation to other organs.
关键词
水相生态系
水生动物
^134CS
cesium-134
aquaeous ecosystem
behaviour
aquatic animal
absorption
distribution
