Reproduction, Embryonic Development, and Growth in the Pond Snail, Physa gyrina Say

1954 ◽  
Vol 73 (2) ◽  
pp. 124 ◽  
Author(s):  
Robert M. DeWitt
Keyword(s):  
Embryonic Development ◽  
Pond Snail ◽  
Physa Gyrina

The Intrinsic Rate of Natural Increase in a Pond Snail (Physa gyrina Say)

1954 ◽  
Vol 88 (842) ◽  
pp. 353-359 ◽  
Author(s):  
Robert M. DeWitt
Keyword(s):  
Intrinsic Rate ◽  
Natural Increase ◽  
Pond Snail ◽  
Physa Gyrina

Expression and translation of the egg-laying neuropeptide hormone genes during post-embryonic development of the pond snail Lymnaea stagnalis

1994 ◽  
Vol 275 (2) ◽  
pp. 369-375 ◽  
Author(s):  
R. P. J. De Lange ◽  
J. van Minnen ◽  
H. H. Boer
Keyword(s):  
Embryonic Development ◽  
Lymnaea Stagnalis ◽  
Egg Laying ◽  
Pond Snail ◽  
Neuropeptide Hormone

scholarly journals SPECIFIC FEATURES OF EMBRYONIC DEVELOPMENT OF POND SNAIL (LYMNAEA STAGNALIS L.) UNDER ANTHROPOGENIC INFLUENCE OF CHLORIDE COMPOUNDS IN WATER

2021 ◽  
Vol 2021 (3) ◽  
pp. 134-141
Author(s):  
Aleksandr Gorbunov ◽  
Dmitry Nikiforov-Nikishin ◽  
Oleg Gorbunov
Keyword(s):  
Embryonic Development ◽  
Lymnaea Stagnalis ◽  
Water Environment ◽  
Model Organism ◽  
High Sensitivity ◽  
Biological Indicators ◽  
Anthropogenic Factors ◽  
Pond Snail ◽  
Integral Parameter ◽  
Egg Shells

The article highlights the research of embryonic development of hydrobionts under the influence of anthropogenic factors of water solutions – chlorobenzene and tetrachloroethylene. To detect the toxicity of chloride pollutants in a freshwater reservoir, representatives of benthic mollusks (big pond snail Lymnaea stagnalis L.) were used as a model organism. According to the results of research, it was found that at a concentration of 0.01 mg/l of chlorobenzene solution individual anomalies of embryonic development of the pond fish are observed, but at higher concentrations its development is delayed by 5-6 stages in comparison with the control. As an integral parameter of pond fish development, we can take indicators of the biological toxicity criterion: Hatchling and its survival over a 10-day period after leaving the egg shells. Changes in the physiological parameters of pond fish embryos begin with a chlorobenzene concentration of 0.01 mg/l; the maximum permissible concentration for tetrachloroethylene for the considered biological indicators should be considered 0.05 mg/l. It is noted that in big pond snail (Lymnaea stagnalis L.) the hatch of juveniles from egg shells is the most sensitive indicator when determining the toxicity of an aqueous solution; and less sensitive indicators are the number of eggs laid and the survival of juveniles in the first 10 days after hatching. The test object used is a large pond, which has shown a high sensitivity to contamination of the water environment with chlorinated ecotoxicants and can be recommended for a comprehensive quality assessment when biotesting freshwater waters

The Ecology and Life History of the Pond Snail Physa Gyrina

Ecology ◽  
1955 ◽  
Vol 36 (1) ◽  
pp. 40-44 ◽  
Author(s):  
Robert M. DeWitt
Keyword(s):  
Life History ◽  
Pond Snail ◽  
Physa Gyrina ◽  
History Of

scholarly journals Parent–offspring similarity in the timing of developmental events: an origin of heterochrony?

2013 ◽  
Vol 280 (1769) ◽  
pp. 20131479 ◽  
Author(s):  
Oliver Tills ◽  
Simon D. Rundle ◽  
John I. Spicer
Keyword(s):  
High Resolution ◽  
Embryonic Development ◽  
Intraspecific Variation ◽  
Genetic Basis ◽  
Raw Material ◽  
Pond Snail ◽  
Developmental Event ◽  
Event Timing ◽  
Radix Balthica ◽  
Temporal And Spatial

Understanding the link between ontogeny (development) and phylogeny (evolution) remains a key aim of biology. Heterochrony, the altered timing of developmental events between ancestors and descendants, could be such a link although the processes responsible for producing heterochrony, widely viewed as an interspecific phenomenon, are still unclear. However, intraspecific variation in developmental event timing, if heritable, could provide the raw material from which heterochronies originate. To date, however, heritable developmental event timing has not been demonstrated, although recent work did suggest a genetic basis for intraspecific differences in event timing in the embryonic development of the pond snail, Radix balthica . Consequently, here we used high-resolution (temporal and spatial) imaging of the entire embryonic development of R. balthica to perform a parent–offspring comparison of the timing of twelve, physiological and morphological developmental events. Between-parent differences in the timing of all events were good predictors of such timing differences between their offspring, and heritability was demonstrated for two of these events (foot attachment and crawling). Such heritable intraspecific variation in developmental event timing could be the raw material for speciation events, providing a fundamental link between ontogeny and phylogeny, via heterochrony.

Chronic toxicity of the azaarene quinoline, a synthetic fuel component, to the pond snail Physa gyrina

1982 ◽  
Vol 3 (1-11) ◽  
pp. 193-198 ◽  
Author(s):  
Raymond E. Millemann ◽  
Daniel S. Ehrenberg
Keyword(s):  
Chronic Toxicity ◽  
Pond Snail ◽  
Fuel Component ◽  
Synthetic Fuel ◽  
Physa Gyrina

scholarly journals Progestogen-induced alterations and their ecological relevance in different embryonic and adult behaviours of an invertebrate model species, the great pond snail (Lymnaea stagnalis)

2020 ◽  
Author(s):  
Reka Svigruha ◽  
Istvan Fodor ◽  
Judit Padisak ◽  
Zsolt Pirger
Keyword(s):  
Heart Rate ◽  
Embryonic Development ◽  
Development Time ◽  
Lymnaea Stagnalis ◽  
Feeding Activity ◽  
Future Research ◽  
Signal Pathways ◽  
Pond Snail ◽  
Model Species ◽  
Invertebrate Model

AbstractThe presence of oral contraceptives (basically applying estrogens and/or progestogens) poses a challenge to animals living in aquatic ecosystems and reflects a rapidly growing concern worldwide. However, there is still a lack in knowledge about the behavioural effects induced by progestogens on the non-target species including molluscs. In the present study, environmental progestogen concentrations were summarised. Knowing this data, we exposed a well-established invertebrate model species, the great pond snail (Lymnaea stagnalis) to relevant equi-concentrations (1, 10, 100, and 500 ng L−1) of mixtures of four progestogens (progesterone, drospirenone, gestodene, levonorgestrel) for 21 days. Significant alterations were observed in the embryonic development time, heart rate, feeding, and gliding activities of the embryos as well as in the feeding and locomotion activity of the adult specimens. All of the mixtures accelerated the embryonic development time and the gliding activity. Furthermore, the 10, 100, and 500 ng L−1 mixtures increased the heart rate and feeding activity of the embryos. The 10, 100, and 500 ng L−1 mixtures affected the feeding activity as well as the 1, 10, and 100 ng L−1 mixtures influenced the locomotion of the adult specimens. The differences of these adult behaviours showed a biphasic response to the progestogen exposure; however, they changed approximately in the opposite way. In case of feeding activity, this dose-response phenomenon can be identified as a hormesis response. Based on the authors’ best knowledge, this is the first study to investigate the non-reproductive effects of progestogens occurring also in the environment on molluscan species. Our findings contribute to the global understanding of the effects of human progestogens, as these potential disruptors can influence the behavioural activities of non-target aquatic species. Future research should aim to understand the potential mechanisms (e.g., receptors, signal pathways) of progestogens induced behavioural alterations.

Sign in / Sign up

Export Citation Format

Share Document