Effect of aluminum and silicic acid on the behaviour of the freshwater snailLymnaea stagnalis

2000 ◽  
Vol 57 (6) ◽  
pp. 1151-1159 ◽  
Author(s):  
Morag M Campbell ◽  
Keith N White ◽  
Ravin Jugdaohsingh ◽  
Jonathan J Powell ◽  
Catherine R McCrohan
Keyword(s):  
Silicic Acid ◽  
Natural Environment ◽  
Feeding Behaviour ◽  
Lymnaea Stagnalis ◽  
Natural Populations ◽  
Aluminum Nitrate ◽  
Pond Snail ◽  
Behavioural Changes ◽  
Neutral Ph ◽  
Behavioural Activity

A major factor influencing the toxicity of Al at neutral pH is the presence of complexing ligands. This study compared the effect of exposure to aluminum nitrate, aluminum lactate, and aluminum maltol, in the presence or absence of monomeric silica (Si), on the behaviour of the pond snail Lymnaea stagnalis. Concentrations of Al and Si used were similar to those found in the natural environment. Soluble Al concentration in the water fell significantly with time over 48 h following addition as the nitrate or lactate (500 μg·L-1), presumably owing to polymerisation as the colloidal hydroxide. This loss was enhanced by the presence of snails or Si (Al:Si = 1:15). Aluminum maltol largely remained in solution. Snails exposed to all three Al compounds showed depression of behavioural activity after 7 days; this effect was ameliorated in the presence of higher (Al:Si = 1:15) but not lower (Al:Si = 1:1) concentrations of Si. Depression of feeding behaviour occurred with all three Al compounds, although it was delayed in the presence of aluminum maltol. Expression of conditioned feeding was inhibited in snails exposed to aluminum nitrate during training and testing. The behavioural changes are likely to be mirrored in the field, with adverse consequences for the "fitness" of natural populations.

Effect of aluminium and lead on activity in the freshwater pond snail Lymnaea stagnalis

1995 ◽  
Vol 52 (8) ◽  
pp. 1623-1629 ◽  
Author(s):  
R. Truscott ◽  
C. R. McCrohan ◽  
S. E. R. Bailey ◽  
K. N. White
Keyword(s):  
Lymnaea Stagnalis ◽  
Time Lapse ◽  
Freshwater Snail ◽  
Pond Snail ◽  
Neutral Ph ◽  
Freshwater Pond ◽  
Water Conditions ◽  
Static Water ◽  
Increased Activity

Time-lapse video was used to examine the effect of short- (19 h) and long-term (1 year) exposure to Al or Pb at neutral pH in static water conditions on the total distance moved by the freshwater snail Lymnaea stagnalis. Aluminium at 100, 200, 500, or 1000 μg∙L−1 normally depressed and Pb at 50 and 200 μg∙L−1 often increased activity over the first 19 h of exposure. Smaller (younger) snails generally showed greater sensitivity to Al. Exposure to 100 or 500 μg Al∙L−1 for up to 30 days caused hyperactivity, but thereafter and 1 year later, activity was similar to controls, suggesting that the snails had become tolerant. Lead (200 μg∙L−1) caused continued hyperactivity for up to 50 days, although movement was significantly reduced after 1 year, suggesting that acclimation had occurred. The effect of Al is interesting given the supposed limited bioavailability of this metal at neutral pH.

scholarly journals A survey of miRNAs involved in biomineralization and shell repair in the freshwater gastropod Lymnaea stagnalis

2021 ◽  
Vol 1 (1) ◽  
Author(s):  
Nicolas Cerveau ◽  
Daniel John Jackson
Keyword(s):  
Matrix Protein ◽  
Lymnaea Stagnalis ◽  
Sequence Similarity ◽  
Mature Mirnas ◽  
Pond Snail ◽  
Mrna Levels ◽  
Forming Process ◽  
Rna Molecules ◽  
Freshwater Gastropod ◽  
Shell Matrix

AbstractMicroRNAs (miRNAs) are a deeply conserved class of small, single stranded RNA molecules that post-transcriptionally regulate mRNA levels via several targeted degradation pathways. They are involved in a wide variety of biological processes and have been used to infer the deep evolutionary relationships of major groups such as the Metazoa. Here we have surveyed several adult tissues of the freshwater pulmonate Lymnaea stagnalis (the Great Pond Snail) for miRNAs. In addition we perform a shell regeneration assay to identify miRNAs that may be involved in regulating mRNAs directly involved in the shell-forming process. From seven mature tissues we identify a total of 370 unique precursor miRNAs that give rise to 336 unique mature miRNAs. While the majority of these appear to be evolutionarily novel, most of the 70 most highly expressed (which account for 99.8% of all reads) share sequence similarity with a miRBase or mirGeneDB2.0 entry. We also identify 10 miRNAs that are differentially regulated in mantle tissue that is actively regenerating shell material, 5 of which appear to be evolutionarily novel and none of which share similarity with any miRNA previously reported to regulate biomineralization in molluscs. One significantly down-regulated miRNA is predicted to target Lst-Dermatopontin, a previously characterized shell matrix protein from another freshwater gastropod. This survey provides a foundation for future studies that would seek to characterize the functional role of these molecules in biomineralization or other processes of interest.

Histochemical study on the relation between NO-generative neurons and central circuitry for feeding in the pond snail, Lymnaea stagnalis

1998 ◽  
Vol 32 (1) ◽  
pp. 57-63 ◽  
Author(s):  
Hisayo Sadamoto ◽  
Dai Hatakeyama ◽  
Satoshi Kojima ◽  
Yutaka Fujito ◽  
Etsuro Ito
Keyword(s):  
Lymnaea Stagnalis ◽  
Histochemical Study ◽  
Pond Snail

Bioaccumulation and toxicity of aluminium in the pond snail at neutral pH

2000 ◽  
Vol 51 (2-4) ◽  
pp. 309-316 ◽  
Author(s):  
Cathy R. McCrohan ◽  
M. M. Campbell ◽  
R. Jugdaohsingh ◽  
S. Ballance ◽  
J. J. Powell ◽  
...  
Keyword(s):  
Pond Snail ◽  
Neutral Ph
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