^(14)CO_3^(2-)在红鲤体内的分布与积累动态

Distribution and Accumulation Dynamics of ^(14)CO_3^(2-) in Red Common Carp

采用同位素示踪技术研究14CO32-在红鲤体内的分布与积累动态。结果表明:在红鲤各部位中均检测到了14C的存在,表明红鲤会从水体中摄入、吸附14CO32-,并在各组织器官中积累。红鲤从水体中摄入和吸收14CO32-的主要器官是肠胃道(内脏),与水体直接接触而吸附、吸收的14CO32-主要集中在鱼鳃、鱼鳍和鱼鳞中,肉、皮和骨中的14C比活度相对较低,但远远高于本底,表明由内脏、鱼鳃等组织吸附、吸收的14CO32-除大部分被排泄、解吸外,仍有部分输运到了鱼体的内部组织。鱼体各部位中14C的比活度差异很大,其大小次序为:内脏>鱼鳃、鱼鳍>鱼鳞>鱼头,鱼骨>鱼皮、鱼肉。

The distribution and accumulation dynamics of ^14CO3^2- in red common carp was studied by using isotope- tracex technology. The results showed that： t4C was detected in all parts of red common carp. It suggested that the ^14CO3^2- ions in water were ingested and adsorbed by red common carp, and accumulated in different apparatus. The main apparatus of red common carp to ingest and absorb ^14CO3^2- ions was intestines and stomach （viscera）. ^14CO3^2- of adsorption or absorption by direct contact with water mainly concentrated on the gill, fin and scale. The specific activity of ^14C in meat, skin and bone was lower, but much higher than the level of background. All that showed although most of ^14CO3^2- ions adsorbed and absorbed by viscera, gill and et al were egested and desorbed, some of them were still transported to inner organs, The specific activity diversity of ^14C in different parts of red common carp was greatly obvious. The order in different parts is： viscera〉 gill, fin〉 scale〉 head, bone〉 skin, meat.