BIOACCUMULATION AND TOXIC EFFECTS OF ELEVATED LEVELS OF 3,3′,4,4′-TETRACHLOROAZOBENZENE (33′44′-TCAB) TOWARDS AQUATIC ORGANISMS, Ⅱ: BIOACCUMULATION AND TOXIC EFFECTS OF DIETARY 33′44′-TCAB ON THE JAPANESE MEDAKA (Oryzias Latipes)

摘要

The polychlorinated aromatic compound 3,3′,4,4′-tetrachloroazobenzene (33′44′-TCAB) is a contaminant of 3,4-dichloroaniline (3,4-DCA) based herbicides, and of agricultural soils. In this study, the Japanese Medaka (Oryzias latipes) was exposed to 0.5 - 2500 ppm 33′44′-TCAB through its diet. There was a distinct trend towards increased mortality and increased body burdens of 33′44′-TCAB with increasing 33′44′-TCAB charge in the food. At the highest levels of exposure, there was a significant number of excess deaths compared to control groups.