Eradication of fishes by application of ammonia
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Date
1983
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Abstract
A simple method is described for the eradication of undesirable fishes from fish culture ponds by application of ammonia. Modifying an earlier technique of direct injection of anhydrous ammonia, a trial was carried out in which ammonia was released by the application of solutions of calcium hydroxide and ammonium sulphate in a ratio of 1:1.8. Ammonia at a concentration of 15 ppm (12.4 ppm N) killed plankton, minnows and predatory fishes including the air breathing species. The advantages of the method are discussed.
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Aquaculture,35 (1983) 273-275