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Juglone (5‐hydroxy‐1,4‐naphthoquinone) as a Fish Toxicant
Author(s) -
Marking Leif L.
Publication year - 1970
Publication title -
transactions of the american fisheries society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.696
H-Index - 86
eISSN - 1548-8659
pISSN - 0002-8487
DOI - 10.1577/1548-8659(1970)99<510:jhaaft>2.0.co;2
Subject(s) - juglone , rainbow trout , toxicant , ictalurus , bioassay , toxicity , fish <actinopterygii> , toxicology , ictaluridae , catfish , chemistry , biology , environmental chemistry , zoology , fishery , botany , ecology , organic chemistry
Juglone, a biologically active chemical occurring in various parts of walnut trees, was tested for its toxicity to fish. The 96‐hour LC50 values obtained from static bioassays at 12 C range from 27 to 88 parts per billion for rainbow trout, northern pike, goldfish, carp, white suckers, black bullheads, channel catfish, green sunfish and bluegills. The toxicity of juglone to rainbow trout and bluegills was not altered significantly in waters of different temperature or hardness. Standard (pH = 7.4) and buffered (pH = 9.0) solutions of juglone aged for one week effectively killed rainbow trout although approximately three times as much juglone was required at the higher pH. According to other investigators, juglone is easily reduced to less toxic components by factors in the natural environment. However, juglone is sufficiently persistent to eliminate target fish prior to its degradation.