Histopathological effects of copper on selected epithelial tissues of snails

Fully grown Bulinus tropicus were exposed to 3 cm3 of 1 mg copper sulphate per kg per snail for 6 h at pH 8.4, after which the tentacles and external head epithelium were removed for examination by transmission electron microscopy. Tissue damage was particularly marked in the basal lamina area where...

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Bibliographic Details
Published in:Bulletin of environmental contamination and toxicology 1986-06, Vol.36 (6), p.906-911
Main Authors: WOLMARANS, C. T, VAN AARDT, W. J, COETZEE, J
Format: Article
Language:English
Subjects:
Adsorption
Animal and plant ecology
Animal, plant and microbial ecology
Animals
Applied ecology
Autoecology
Biological and medical sciences
Bulinus tropicus
Copper - metabolism
Copper - toxicity
Copper Sulfate
Ecotoxicology, biological effects of pollution
Epithelium - drug effects
Epithelium - metabolism
Epithelium - ultrastructure
Fresh water environment
Fundamental and applied biological sciences. Psychology
Microscopy, Electron
Protozoa. Invertebrata
Snails - anatomy & histology
Snails - metabolism
Water Pollutants, Chemical - analysis
Water Pollutants, Chemical - toxicity
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Summary:Fully grown Bulinus tropicus were exposed to 3 cm3 of 1 mg copper sulphate per kg per snail for 6 h at pH 8.4, after which the tentacles and external head epithelium were removed for examination by transmission electron microscopy. Tissue damage was particularly marked in the basal lamina area where the connective tissue either swelled or pulled away from the basal lamina, resulting in vacuoles up to 10.46 um diameter in the tentacle and up to 4.5 um diameter in the head epithelium. These changes were similar to those reported by Sullivan and Ching who examined the rectal ridge of copper exposed snails. In the present study, no damage to the microvilli was seen in a tentacle tissue. Tissue damage was generally restricted to the area directly beneath the surface epithelial layer.
ISSN:0007-4861
1432-0800
DOI:10.1007/BF01623603