臺灣西南沿海養殖貝類大量死亡原因之研究 - 農業知識入口網

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In order to know whether the death of shellfishes is related to the toxic substance, the water samples from Pu-Tzu River and its estuaries were also bioassayed with common carp, guppies, and tilapia. It was found that: (1) On April 30, 1974, the water sampled either from the river or its estuary all contained high toxicites. Even when it was diluted to 4%， about half of the test fish died after 96 hr. This explains the large scale death of shelIfishes in the field on April 29-30, 1974. (2) From May 1974 through April 2, 1975, in spite of the high concentration of the test water (as high as 25%), almost no fish died after 96 hr. At this time also no death of shellfishes occured in the culture area.