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수종의 (數種) 농약이 뱀장어 치어에(稚魚) 미치는 영향에 관하여
A Stydy of the Influence of Agricultural Pesticides to the Upstreaming Elvers
유봉석 ( Bong Suk Ryu )
UCI I410-ECN-0102-2008-450-002262968

1. 6 kinds of agricultural pesticides which were spread or scatered over rice paddies, vegetable gardens and orchards in order to exterminate vermin or other diseases had an immediate influence on the elvers death. 2. Among 6 kinds of agricultural pesticides examined, Folithion & Aldrin was the most poisnous, and killed the elver within 3 minutes at 1.0ppm, on the other hend, Bla-es was the least noxious, it took 40 minutes to die for the elver at 1.0ppm. E.P.N, PTA-B, C.D.R was in sequence. 3. The life span of the elver in water pollution with agricultural pesticides was 5 hrs and 36 minutes with temperature at 26-28c. Therefore, it is concluded that the elver can not sustain life is the water of irrigation ditches affected by the agricultural pesticides which flow into them.

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