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THE INFLUENCE OF DISSOLVED‐OXYGEN CONCENTRATION ON THE TOXICITY OF UN‐IONIZED AMMONIA TO RAINBOW TROUT ( SALMO GAIRDNERII RICHARDSON)
Author(s) -
DOWNING KATHLEEN M.,
MERKENS J. C.
Publication year - 1955
Publication title -
annals of applied biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 80
eISSN - 1744-7348
pISSN - 0003-4746
DOI - 10.1111/j.1744-7348.1955.tb02472.x
Subject(s) - rainbow trout , salmo , ammonia , oxygen , biology , nitrogen , zoology , toxicity , trout , environmental chemistry , fishery , fish <actinopterygii> , chemistry , biochemistry , organic chemistry
Periods of survival of rainbow trout in concentrations of un‐ionized ammonia in the range 0.86‐1.96 parts per million of nitrogen increased as the concentration of dissolved oxygen was raised from 1–5 to 8‐5 p.p.m. At each concentration of dissolved oxygen the period of survival decreased as the concentration of un‐ionized ammonia increased from 0.86 to 1.96 p.p.m. The effect of oxygen in increasing survival time was greater in the lower concentrations of un‐ionized ammonia.