行政院國家科學委員會補助專題研究計畫期中報告:台灣烏腳病地區養殖魚類砷累積之生態毒物模擬(1/3)

The general objective of our work in the
first year is to determine bioaccumulation of
arsenic (As) in tilapia from blackfoot disease
(BFD) area in Taiwan. The average As pond
water concentrations ranged from 17.8 – 49
mg L-1. Acute toxicity tests over 96 h
showed that As concentration to cause
toxicity to tilapia ranged from 69,060 mg As
L-1 in 24 h toxicity test to 28,680 mg As L-1
in 96 h toxicity test. The highest
bioconcentration factor (BCF) is found in
the intestine (maximum value: 2270). The
order of BCF was intestine > stomach >
liver gill > muscle. Significantly higher
concentrations of As are obtained in the
viscera of tilapia (12.65±10.17 mg g-1 dry wt
(mean ± SD)) than that of in muscle tissue
(3.55±0.42 mg g-1 dry wt).