CHRONIC TOXICITY OF A SYNTHETIC TRI-ARYL PHOSPHATE OIL TO FISH

  • 1 January 1975
    • journal article
    • research article
    • Vol. 5  (6) , 361-369
Abstract
Rainbow trout (Salmo gairdneri) were exposed to IMOL S-140, a synthetic high-temperature lubricating oil composed of tri-aryl phosphates and, although no sign of acute toxicity was evident, the fish slowly developed symptoms of chronic poisoning. Floating flood pellets were refused, the activities of glutamic oxalacetic transaminase and lactate dehydrogenase in serum were greatly elevated and internal fatty tissues became discolored. Neither serum nor brain cholinesterase activities were inhibited. [The anticipated use of IMOL S-140 as a lubricant in future natural gas pipeline pumping stations in northern Canada prompted concern for its toxicity to fish and other freshwater organisms.].

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