The article presents tests on one-year artificially bred Atlantic salmon. For 14 days, fish were exposed to lead nitrate Pb (NO3)2 under concentration corresponding to the highest allowable standard of inland water making 0.005 mg Pb/l. Lead (Pb) in fish tissues (muscle and gills) was determined applying atomic absorption spectrophotometry (AAS). The obtained results have showed that the maximum-permissible-amount of lead in fish (MPA = 0.2 mg Pb/kg) (Lithuanian Hygiene Standard HN 54:2003) slightly exceeds in salmon gills (0.237 mg/kg), whereas in muscles, it exceeds more than twice (0.4 mg/kg). The received data have been compared with the results of the previous studies, where under the same experimental conditions, the bioaccumulation of lead in five types of fish, including roach, perch, rainbow trout, stone loach and gibel carp has been investigated. The conducted research has also revealed that different fish species quite differently accumulate lead while MPA has exceeded in the body tissues of a number of fish, i.e., in the majority of cases, it can be attributed to salmon and stone loach muscles and gills. When observing water bodies, the collected experimental data completely coincide with the results of studies on lead bioaccumulation in fish.

Article in Lithuanian