Sandimirov S. Screening studies of POP levels in fish from selected lakes in the Paz watercourse / In State of the environment in the Norwegian, Finnish and Russian border area. The Finnish Environment. Finland, Jyvaskyla: Kopijyva Oy. 2007, №6.

Screening studies o f POPs in fish from the Paz watercourse Chlordanes Chlordane is a versatile, broad-spectrum contact insecticide used mainly for non-agricultural purposes (primarily for the protection of structures, but also on lawn and turf, ornamental trees, and drainage ditches). It is also used on corn, potatoes, and livestock. When used for termite control, it is applied to the soil by subsurface injection. Recently, the use of chlordane has been restricted in many countries, due to its toxic effects and capacity to persist and bioaccumulate in the environment. Chlordane is banned in Russia (de March et a l ., 1989). Chlordane levels in fish from the study area are presented in Tables 3.1 and 3.2 ., Appendix 3. The distribution of Chlordanes in hepatic tissues is also is shown in Figure 4. Chlordane levels were higher in fish from Lake Stuorajavri than in fish from the Pasvik area. The individual compounds which contributed most to the concentrations of ZChlordanes in whitefish and pike from the Pasvik area were trans- and cis- nonachlor, followed by cis- chlordane. Oxychlordane was not detected in whitefish from this area - only in pike liver at low level (0.4 ng/g ww). However, in fish from Stuorajavri the oxychlordane was the dominant chlordane compound. In an earlier study carried out in the 1990s (Skotvold et al., 1997) in selected Finnmark lakes, all ZCHL concentrations in whitefish were below 0.5 ng/g ww. Figure 4. Distribution o f UCHL hepatic levels infish from the study area. Exposure and effects: Chlordane exposure has been linked to liver and blood disorders, severe neurological effects and damage to the endocrine and reproductive systems. JMPR re-evaluated chlordane in 1986 and established an ADI of 0.5 |ig/kg of body weight (IARC, 1979). A re­ evaluation of chlordane was carried out in 1991 and it was concluded that although there is Akvaplan-niva report APN 514-3365.02 12