Abstract
The pattern of arsenic concentration in several tissues ofLepomis cyanellus was measured (by neutron activation analysis) as a function of exposure time at 10‡, 20‡, and 30‡C and 0, 30, 60 ppm of arsenic as sodium arsenate. Individual variability of arsenic uptake did not override trends of greater uptake with increasing exposure time, temperature, and arsenic concentration. The mean temperature coefficient of 4.5 for arsenic uptake in livers was higher than O'Hara's (1968) metabolic figures of 1.6 to 3.0 forLepomis species. The biological half-life of arsenic in liver and gut of live specimens exposed to 30 and 60 ppm of arsenic at 10‡C was about one week. Percentage survival decreased and mean arsenic uptake increased slightly as temperature and arsenic concentration increased.

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