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Morphological changes in the gills of Lophiosilurus alexandri exposed to un‐ionized ammonia
Author(s) -
Cardoso E. L.,
ChiariniGarcia H.,
Ferreira R. M. A.,
Poli C. R.
Publication year - 1996
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.1095-8649.1996.tb00078.x
Subject(s) - ammonia , gill , biology , larva , scanning electron microscope , zoology , ecology , fishery , fish <actinopterygii> , biochemistry , materials science , composite material
The average lethal concentration of un‐ionized ammonia (48‐h LC 50 NH 3 ) has been determined by the static assay for larvae (0.48 mg l −1 ) and alevins (0.92 mg l −1 ) of ‘pacamã’ Lophiosilurus alexandri. Studies by light and scanning electron microscopes at the greatest concentration of NH 3 (0.99 mg l −1 for larvae and 1.5 mg l −1 for alevins) have shown that the changes in the cells and branchial tissue were more intense in the alevins.