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12 results for “Lymnaea stagnalis”
Dataset for training Dev-ResNet for detection of developmental events in Lymnaea stagnalis
<p>Dataset for training <a href="https://github.com/EmbryoPhenomics/dev-resnet">Dev-ResNet</a> for detection of developmental events in<em> Lymnaea stagnalis. </em></p> <p> </p> <p>The following naming scheme is used for the individual GIF files:</p> <p>Example: "./video/20C_A_B1_315hr.gif"</p> <ul> <li><strong>"./video/"</strong> --> Source folder.</li> <li><strong>"20C" </strong> --> Treatment, here incubation temperature.</li> <li><strong>"A"</strong> --> Egg mass label.</li> <li><strong>"B1" </strong> --> Individual embryo label.</li> <li><strong>"315hr" </strong>--> Hours since first cell division.</li> </ul> <p> </p>
Figs 1–2 in The First Record Of Parthenitae And Cercariae Of Plagiorchis Multiglandularis (Trematoda, Plagiorchiidae) In Lymnaea Stagnalis In Ukraine
Figs 1–2. Plagiorchis: 1 — P. multiglandularis; 2 — P. elegans (A — cercaria; stylet; B — stylet). Scale bar: 1— 0.1 mm; 2 — 0.01 mm.
Four videos showing surface-crawling locomotion and pedal surface collection in Lymnaea stagnalis (Lymnaeidae, Gastropoda)
<p> </p> <p>Many freshwater and marine gastropods can glide along the water surface with the sole of the foot facing upward. The force driving this surface-crawling locomotion is generated by the epithelial cilia on the sole, which push a ribbon of mucus produced on the anterior sole backwards into the water. If cilia on the posterior part of the sole stop beating, mucus accumulates on the posterior sole together with particles from the water surface. This so-called pedal surface collection enables gastropods to harvest edible materials from the surface. To perform pedal surface collection, the animals may either float or attach themselves with the posterior tip of the foot to solid substrates such as aquatic plants or aquarium walls.</p> <p>The four videos presented here show surface-crawling locomotion and pedal surface collection in the great pond snail, <em>Lymnaea stagnalis</em> (L., 1758), a common holarctic species. The animals came from a pond in a forest near Frankfurt am Main, west central Germany. Shell lengths of the snails shown range from 31 to 37 mm. Videos were captured with various inexpensive digital cameras without special equipment for illumination etc. Video material was processed with ImageJ (https://imagej.nih.gov/ij/) and QuickTimePro (https://support.apple.com/downloads/quicktime).</p> <p> </p> <p><strong>LYMNAEA-1 surface-crawling locomotion 1:</strong> <em>Lymnaea stagnalis</em> crawls onto the water surface from the wall of the tank it is kept in, glides along the surface, and returns to the tank wall. The animal can be seen breathing, and particles move at constant velocity along the entire sole of the crawling snail. The earliest description of this behavior I know of is found in LISTER (1694: p. 8).</p> <p> </p> <p><strong>LYMNAEA-2 pedal surface collection 1:</strong> (A) <em>Lymnaea stagnalis</em> crawls along the water surface. (B) The floating animal collects mucus and particles from the surface on its posterior sole and (C) eats the accumulated material. This is the behavior BROCKMEIER (1898) called 'Planktonfischen' (plankton fishing).</p> <p> </p> <p><strong>LYMNAEA-3 pedal surface collection 2:</strong> <em>Lymnaea stagnalis</em> attached to plants conducts pedal surface collection. Similar behavior was mentioned by KAISER (1960).</p> <p> </p> <p><strong>LYMNAEA-4 pedal surface collection 3:</strong> <em>Lymnaea stagnalis</em> conducts pedal surface collection in an upright position, being attached to a vertical solid substrate (a flower pot, in this case). Pedal surface collection in this posture has been studied previously in members of the families Ampullariidae (JOHNSON 1952) and Planorbidae (DELIAGINA & ORLOVSKY 1990).</p> <p> </p>
Tracking the path from learning to innate predator recognition in Lymnaea stagnalis
<p>Organisms evolve adaptive strategies to adjust to the rapidly changing environmental stressors. Predation pressure is one of the strongest selective forces and organisms respond to predatory threats via innate and learned responses. We utilized a natural, experimental set-up, where two lakes –Stoney and Margo in Saskatchewan, Canada containing natural populations of the prey Lymnaea stagnalis differed in the presence and absence of an invasive, predatory Northern crayfish, Faxonius virilis. We exploited the contrast in the predation backgrounds of the snail populations from the two lakes to test, a) if predator-naïve snails learn to detect a novel invasive predator, b) predator recognition in predator-experienced snails is innate, and, c) if learning about a novel predator gets transmitted to the successive generations. We quantified predator fear memory formation using a higher-order learning paradigm called configural learning. We found that a) predator-naïve snails learned to recognize the novel predator even after a brief exposure to predator cues highlighting the role of learning in combating invasive predators, b) predator recognition in predator-experienced snails is innate, and, c) the learning and predator detection mechanisms is not transmitted to successive generations. The population variation observed in the predator-detection mechanism may be due to the activation and deactivation of a predatory template as a function of predator exposure in the environment. We find an interesting study system to address how fear learning occurs and the possible mechanism of the formation of innate fear recognition from a learned fear recognition.</p>
Tracking the path from learning to innate predator recognition in Lymnaea stagnalis
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Timelapse video of development of Lymnaea stagnalis
<p>A time-lapse video showcasing the entire development of a <em>Lymnaea stagnalis</em> embryo.</p>
Data from: Environmental versus anthropogenic effects on population adaptive divergence in the freshwater snail Lymnaea stagnalis
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Figure 1 from: Vinarski M (2015) Conceptual shifts in animal systematics as reflected in the taxonomic history of a common aquatic snail species (Lymnaea stagnalis). Zoosystematics and Evolution 91(2): 91-103. https://doi.org/10.3897/zse.91.4509
Figure 1 - A great pond snail in its natural environment. 12.08.2014. Russia, Western Siberia, "Malaya Sos'va" Nature Reserve, Kopanoye Lake (photo: M. Vinarski).
Figure 4 from: Vinarski M (2015) Conceptual shifts in animal systematics as reflected in the taxonomic history of a common aquatic snail species (Lymnaea stagnalis). Zoosystematics and Evolution 91(2): 91-103. https://doi.org/10.3897/zse.91.4509
Figure 4 - Varieties of Lymnaea stagnalis as they were identified by malacologists of the 19th century. A. Lymnaea stagnalis var. typica (det. S. Clessin; ZIN). B. Lymnaea stagnalis var. media (det. C.A. Westerlund; GNM). C. Lymnaea stagnalis var. producta (det. C.A. Westerlund; GNM). D. Lymnaea stagnalis var. rosea (identified by a unknown person; ZMUC). E. Lymnaea stagnalis var. colpodia (det. C.A. Westerlund; GNM). F. Lymnaea stagnalis var. variegata (det. C.A. Westerlund; GNM). G. Lymnaea stagnalis var. turgida (det. C.A. Westerlund; GNM). H. Lymnaea stagnalis var. raphidia (det. C.A. Westerlund; GNM). I. Lymnaea stagnalis var. palustriformis (det. A. Fuchs, NHMW). Scale bars 5 mm.
Figure 2 from: Vinarski M (2015) Conceptual shifts in animal systematics as reflected in the taxonomic history of a common aquatic snail species (Lymnaea stagnalis). Zoosystematics and Evolution 91(2): 91-103. https://doi.org/10.3897/zse.91.4509
Figure 2 - Evolution of accuracy in illustrations of Lymnaea stagnalis shell through two centuries. Sources of images: A. Aldrovandi 1606. B. Lister 1678. C. Bonanni 1681. D. Klein 1753. E. Seba 1758. F. Schröter 1779.
Annotation of Sox family proteins of the snail Lymnaea stagnalis (Mollusca: Pulmonata) using transcriptomic data
<p>This annotation of Sox family proteins of Lymnaea stagnalis snail was performed using transcriptome data from the article:</p> <p>Seppälä, O., Walser, JC., Cereghetti, T. et al. Transcriptome profiling of Lymnaea stagnalis (Gastropoda) for ecoimmunological research. BMC Genomics 22, 144 (2021). https://doi.org/10.1186/s12864-021-07428-1</p> <p>Sox2, Sox14, Sox10 and Sox5/6 were annotated using tBLASTn searches against transcriptome from the article upper. </p>
Figure 3 from: Vinarski M (2015) Conceptual shifts in animal systematics as reflected in the taxonomic history of a common aquatic snail species (Lymnaea stagnalis). Zoosystematics and Evolution 91(2): 91-103. https://doi.org/10.3897/zse.91.4509
Figure 3 - Illustrations of living Lymnaea stagnalis by Ginanni (1757).
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