Morphological changes in the gills of Lophiosilurus alexandri exposed to un-ionized ammonia |
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| Authors: | E. L. Cardoso,H. Chiarini-Garcia,&dagger ,R. M. A. Ferreira,&dagger C. R. Poli,&Dagger |
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| Affiliation: | EstaçSão de Hidrobiologia e Piscicultura de Três Marias, CODEV ASF, Caixa Postal 11, 39205-000 Três Marias, MG;Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais;Centro de Ciências Agrárias, Universidade Federal de Santa Catarina, Brazil |
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| Abstract: | ![]()
The average lethal concentration of un-ionized ammonia (48-h LC50NH3) 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 NH3 (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. |
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| Keywords: | Lophiosilurus alexandri gills un-ionized ammonia |
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