Turnover and urinary excretion of free and acetylated MS-222 rainbow trout, Salmo gairdneri

Journal of the Fisheries Research Board of Canada
By: , and 

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Abstract

Rainbow trout (Salmo gairdneri) anesthetized in 100 mg/liter of M.S. 222 at 12 C excreted the drug in free and acetylated forms via the urine during a 24-hr recovery period in freshwater. Of the M.S. 222 excreted, 77-96% was acetylated. Blood levels of free drug in anesthetized trout approximated 75% of the anesthetic concentration, but the amount of acetylated M.S. 222 was relatively insignificant. The blood and urine were cleared of the two fractions of M.S. 222 in 8 and 24 hr respectively. Low levels of aromatic amines of natural origin occurred in blood and urine and were subtracted from measurements of M.S. 222. Intraperitoneal injections of 10-100 mg/kg of M.S. 222 did not induce anesthesia; however, the 24-hr pattern of drug excretion was similar to that observed after anesthesia by immersion. Only 15-21 % of the injected dose was found in the urine, suggesting a second route of drug elimination.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Turnover and urinary excretion of free and acetylated MS-222 rainbow trout, Salmo gairdneri
Series title Journal of the Fisheries Research Board of Canada
DOI 10.1139/f68-003
Volume 25
Issue 1
Year Published 1968
Language English
Contributing office(s) Upper Midwest Environmental Sciences Center
Description pp. 25-31
Larger Work Type Article
Larger Work Subtype Journal Article
Larger Work Title Journal of the Fisheries Research Board of Canada
First page 25
Last page 31