Effects of Temperature on Hatching and Growth of Lymnaea stagnails appressa Say

Vaughn, Charles M.

doi:10.2307/2422289

Cited by 38 publications

(41 citation statements)

References 5 publications

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“…As mentioned in the Introduction, heat alters many important homeostatic functions in Lymnaea including immune system functioning, mortality and reproduction (Vaughn, 1953;McDonald, 1969McDonald, , 1973Seppala and Jokela, 2011). In addition, the higher temperatures increase parasite virulence in snails (Seppala, and Leicht, 2013;Leicht et al, 2013).…”

Section: Discussionmentioning

confidence: 99%

“…It has been demonstrated that laboratory-reared Lymnaea prefer temperatures of around 20°C for optimal growth and mortality (Vaughn, 1953;McDonald, 1969). At higher temperatures, Lymnaea have reduced immune function and parasitic infestation increases (Seppala and Jokela, 2011;Hermann et al, 2013;Seppala and Leicht, 2013;Leicht et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

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Heat stress enhances LTM formation inLymnaea: role of HSPs and DNA methylation

Sunada

Riaz

Freitas

et al. 2016

Journal of Experimental Biology

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Environmentally relevant stressors alter the memory-forming process in Lymnaea following operant conditioning of aerial respiration. One such stressor is heat. Previously, we found that following a 1 h heat shock, long-term memory (LTM) formation was enhanced. We also had shown that the heat stressor activates at least two heat shock proteins (HSPs): HSP40 and HSP70. Here, we tested two hypotheses: (1) the production of HSPs is necessary for enhanced LTM formation; and (2) blocking DNA methylation prevents the heat stressor-induced enhancement of LTM formation. We show here that the enhancing effect of the heat stressor on LTM formation occurs even if snails experienced the stressor 3 days previously. We further show that a flavonoid, quercetin, which inhibits HSP activation, blocks the enhancing effect of the heat stressor on LTM formation. Finally, we show that injection of a DNA methylation blocker, 5-AZA, before snails experience the heat stressor prevents enhancement of memory formation.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Heat stress enhances LTM formation inLymnaea: role of HSPs and DNA methylation

Sunada

Riaz

Freitas

et al. 2016

Journal of Experimental Biology

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“…Reviewing the literature on the response of Lymnaea to exposure to a 30°C thermal stimulus supports our hypothesis that the 1 h exposure to 30°C is perceived by snails as a significant stressor. In the laboratory, the maximum growth rate of Lymnaea is achieved between 11 and 28°C (Vaughn, 1953) and the lowest mortality occurs between 15.7 and 20.1°C (McDonald, 1969). Prolonged exposure to temperatures of 30°C or above is lethal (McDonald, 1973).…”

Section: Discussionmentioning

confidence: 99%

What's hot: the enhancing effects of thermal stress on long-term memory formation in Lymnaea stagnalis

Teskey

Lukowiak

Riaz

et al. 2012

Journal of Experimental Biology

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SUMMARYThe pond snail, Lymnaea stagnalis, naturally inhabits slow flowing, shallow and stagnant environments in the northern temperate zone. Consequently, it will experience wide temperature fluctuations dependent on prevailing weather conditions. We hypothesize that periods of warming act as a thermal stressor to alter memory formation. Snails were exposed to an acute 1 h period of 30°C pond water and we determined how memory formation following operant conditioning of aerial respiration was affected. In the snails used here (Dutch strain), a single 0.5 h training session (TS) results in intermediate-term (3 h) but not long-term memory (LTM). Applying the thermal stressor during training caused memory enhancement (i.e. LTM lasting 24 h). However, the breathing rate also increased in warm water, which might explain the enhanced memory. Therefore, we applied the thermal stressor (1 h at 30°C) up to 4 h before or 1 h after training. This did not alter baseline breathing rate during the period when snails would experience training. However, the thermal stressor whether experienced prior to or following the single TS, resulted in an enhanced memory that persisted up to 48 h (i.e. LTM). We conclude that memory enhancement is due to the stress associated with the thermal stimulus.

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“…Juvenile snails appear to have an additional vertical movement in the water column during their first summer. An immediate posthatching movement to the surface of the water, ostensibly to drain fluid from the lung and commence an air-breathing existence (Noland and Carriker 1946), has been reported in a number of species held under artificial conditions (Walter 1906;Winsor and Winsor 1935;Noland and Carriker 1946;Vaughn 1953;Morris and Boag 1982). In most cases, however, it is unclear where these young snails go once having made this movement from the submersed egg mass to the water's surface.…”

Section: Introductionmentioning

confidence: 99%

Vertical distribution of young pond snails (Basommatophora: Pulmonata): implications for survival

Boag¹,

Thomson²,

Es³

1984

Can. J. Zool.

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The vertical distribution of juvenile pond snails (Lymnaea stagnalis and Stagnicola elodes), hatched from egg masses containing known numbers of viable embryos, was recorded daily in artificial containers under outdoor conditions for up to 25 days after hatching. Both species showed an initial vertical movement to the surface of the water with a subsequent return to the bottom sediments after 10–15 days. This pattern was consistent despite differences in the depth of the water column (13 versus 18.5 cm). At 25 days after hatching more than 85% of the population was in the lower half of the container at any one time, almost all being associated with the bottom sediments. The presence of an adult snail of either species in the same container significantly reduced the survival of young snails (from between 85 and 94% to between 1 and 18%). Consumption of the young snails during their first 10 days out of the egg mass, when they were moving to the surface, accounted for the observed differences in survival. Young snails appeared to be ingested incidently by the foraging adults, most often when the former were concentrated at the air–water–glass interface.

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Effects of Temperature on Hatching and Growth of Lymnaea stagnails appressa Say

Cited by 38 publications

References 5 publications

Heat stress enhances LTM formation inLymnaea: role of HSPs and DNA methylation

Heat stress enhances LTM formation inLymnaea: role of HSPs and DNA methylation

What's hot: the enhancing effects of thermal stress on long-term memory formation in Lymnaea stagnalis

Vertical distribution of young pond snails (Basommatophora: Pulmonata): implications for survival

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