Abstract
Summary
When phenol red is injected intramuscularly into toadfish in doses of 0.01, 0.02, 0.04, 0.08 and 0.16 mg. per kg. of body weight, the % elimination from these doses is 47, 23.5, 13.9, 7.3 and 3.5, respectively. Based on body weight of the fish, this elimination amounts to 0.0047, 0.0047, 0.0054, 0.0057 and 0.0056 mg. per kg. Through this series, increasing the injected dose up to 16 times, increases the mg. per kg. elimination by not more than one-fifth. In other words the excretion remains practically constant.
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