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In vitro evidence for the ionoregulatory role of rainbow trout mucus in acid, acid/aluminium and zinc toxicity
Author(s) -
Handy R. D.,
Eddy F. B.,
Romain G.
Publication year - 1989
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.1095-8649.1989.tb03024.x
Subject(s) - mucus , biology , rainbow trout , toxicity , distilled water , zinc , zinc toxicity , aluminium , biochemistry , medicine , ecology , chemistry , fish <actinopterygii> , fishery , chromatography , organic chemistry
Rainbow trout body mucus dialysed with acidified distilled water at pH 7,5 and 3 experienced ion depletion which was greatest at pH 3 and minimal between pH 7 and 5. Mucus Na + loss is exacerbated in the presence of 1 mg I −1 aluminium as A1 2 (SO 4 ), at pH 5 and 7. Al 2 (SO 4 ), causes greater depletion of Na + from mucus than A1C1 3 . A lethal level of zinc (2 mg 1 −1 ) does not deplete mucus Na − or K + , unlike a lethal level of aluminium (1 mg 1 −1 ) at pH 7. The results are discussed in terms of the ionoregulatory role of mucus in heavy metal and acid toxicity.