Effects of sublethal waterborne cadmium on gills in three teleosteans species: scanning electron microscope study
by Lucrecia Ferrari, Bettina Lorena Eissa, Natalia Alejandra Ossana, Alfredo Salibian
International Journal of Environment and Health (IJENVH), Vol. 3, No. 4, 2009

Abstract: The effects of acute exposure for 96 h to a sublethal concentration of cadmium (300 µg L⁻¹) on the surface gill morphology of the teleosteans Cyprinus carpio, Australoheros facetum and Astyanax fasciatus were studied using Scanning Electron Microscopy (SEM). The main cadmium-induced gill damages in the three species were: structural alterations, oedema and fusion of adjacent secondary lamellae; there was a remarkable disruption of the gill epithelium in Australoheros facetum and excretion of large amount of mucus on the lamellae in Astyanax fasciatus. The reversibility of the alterations after a depuration period was also investigated; in all cases the fishes exhibited a considerable recovery of the gill structure after 96 h in a cadmium-free medium.

Online publication date: Thu, 10-Dec-2009

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