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VOL. 10, ISSUE 12 (2025)
Effect of copper on crawling speed in the freshwater snails Pila globosa, Lymnaea sp., Planorbis sp., and Bellamya sp.
Authors
Nijira Brahma, Sangita Bhowmik
Abstract
A laboratory study was carried out to observe the changes in crawling
speed in four freshwater gastropod species Pila globosa, Lymnaea sp.,
Planorbis sp., andBellamya sp.due to copper (Cu)
exposure. The movement of the snails were observed manually and recorded for 15
min period. A Kruskal-Wallis Test revealed that there were significant
difference in crawling speed in Pila globosa, Lymnaea sp.,and Bellamya
sp. among control, 0.01mgL-1 Cu and 0.1mgL-1
Cuexposed concentration. A Kruskal-Wallis test revealed that there were no
significant difference in crawling speed in Planorbis sp. among control,
0.01mgL-1 Cu and 0.1mgL-1 Cu exposed concentration. The
result showed that Cu in the media had less effect in the changes in crawling
speed of Planorbis sp. which explained that this species is more
resistant to 0.01 mgL-1 Cu, and 0.1mgL-1 Cu concentrations
compared to Pila globosa., Lymnaea sp., and Bellamya sp. The
gastropods showed response against the Cu concentration in the experimental
media by withdrawing the foot, tentacles and closing the operculum. This
behavior might be to escape the toxicity of the metal concentration in the
media. All the four molluscs studied showed no mucus secretions during the exposure
in 0.01mgL-1 Cu and 0.1mgL-1 Cu test media.
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Pages:117-120
How to cite this article:
Nijira Brahma, Sangita Bhowmik "Effect of copper on crawling speed in the freshwater snails <i>Pila globosa, Lymnaea </i>sp<i>., Planorbis </i>sp<i>., </i>and <i>Bellamya </i>sp<i>.</i>". International Journal of Entomology Research, Vol 10, Issue 12, 2025, Pages 117-120
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