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Scanning electron microscopic evaluation of effects of low pH on gills of Channa punctata (Bloch)
Author(s) -
Munshi J. S. D.,
Singh A.
Publication year - 1992
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.1095-8649.1992.tb03171.x
Subject(s) - gill , biology , scanning electron microscope , protein filament , anatomy , electron microscope , ultrastructure , efferent , epithelium , biophysics , fish <actinopterygii> , fishery , biochemistry , materials science , afferent , physics , composite material , genetics , optics
Bioassay of Channa punctata (± 36 g) was carried out in acidic waters of different pH. A 96 h LC 50 , value was obtained at pH 5.3. Scanning electron microscopy of gills of C. punctata showed fusion of adjacent secondary lamellae. At this low pH, dissociation of epithelium of branchial arches and gill filaments take place. At 360 h the branchial epithelium ruptures developing lesions in the gills exposing the efferent filament vessels. At pH 6.6 the tips of adjacent filaments belonging to both oral and aboral hemibranchs fuse in blocks.