Squoxin (1, 1'-methylenedi-2-naphthol) a white crystalline powder, has been used in the manufacture of rubber (Beau, 1954 and Danjard, et al., 1958), for hardening epoxy resins (Sulimson, 1956), and for extracting met chelates (Jensen, 1964). During the late 1960's Squoxin was discovered to be selectively lethal to both the northern squawfish (Ptychocheilus oregonensis) and the umpqua squawfish (P. umpquae) (MacPhee and Ruelle, 1969). Because the chemical was not a chlorinated hydrocarbon, did not contain any heavy metals, and degraded rapidly, it appeared to be a safe, effective tool for fishery managers and fish culturists concerned with predation on juvenile salmonids by squawfish.
Staley, G.S., Hall, K.J.. 1974. Squoxin: A Review of Research and Application. Fish and Wildlife Branch. Fisheries Technical Circular. FTC13
Topic: Fish and Fish Habitats
Keywords: squawfish, umpqua, epoxy resin, fry
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