14CO32-在红鲤体内的分布与积累动态

采用同位素示踪技术研究^14CO3^2-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^14CO3^2-,并在各组织器官中积累.红鲤从水体中摄入和吸收^14CO3^2-的主要器官是肠胃道（内脏）,与水体直接接触而吸附、吸收的^14CO3^2-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^14CO3^2-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.

Distribution and Accumulation Dynamics of 14CO32- in Red Common Carp

The distribution and accumulation dynamics of 14CO32-in red commo n carp was studied by using isotope-tracer technology. The results showed that: 1 4C was detected in all parts of red common carp. It suggested that the 14CO32-i ons in water were ingested and adsorbed by red common carp,and accumulated in d ifferent apparatus. The main apparatus of red common carp to ingest and absorb 1 4CO32-ions was intestines and stomach (viscera). 14CO32-of adsorption or absor ption by direct contact with water mainly concentrated on the gill,fin and scal e. The specific activity of 14C in meat,skin and bone was lower,but much highe r than the level of background. All that showed although most of 14CO32-ions ad sorbed and absorbed by viscera,gill and et al were egested and desorbed,some o f them were still transported to inner organs. The specific activity diversity o f 14C in different parts of red common carp was greatly obvious. The order in di fferent parts is: viscera>gill,fin>scale>head,bone>skin,meat.