Effects of tributyltin pollution on the mud snail, Ilyanassa obsoleta, from the York River and Sarah Creek, Chesapeake B
Sarah Snail 9780383035929 SRA, 1994 15 pages 1994 A gleam in the dark: Phylogenetic species delimitation in the confusing spring-snail genus Bythinella Moquin-Tandon, 1856 (Gastropoda: Rissooidea: Amnicolidae, we re-assess the value of morphological specific descriptors within the spring-snail genus Bythinella by sequencing mitochondrial COI and nuclear ITS1 gene fragments. Taxonomic coverage represents 16 nominal species sampled among 35 populations from France. VARIATION OF SHELL SHAPE IN THE CLONAL SNAIL MELANOIDES TUBERCULATA AND ITS CONSEQUENCES FOR THE INTERPRETATION OF FOSSIL, interpreting paleontological data is difficult because the genetic nature of observed morphological variation is generally unknown. Indeed, it is hardly possible to distinguish among several sources of morphological variation including phenotypic plasticity, sexual. Effects of tributyltin pollution on the mud snail, Ilyanassa obsoleta, from the York River and Sarah Creek, Chesapeake Bay, mud snails, Ilyanassa obsoleta, were collected along gradients of tributyltin (TBT) pollution in the York River-Sarah Creek region of Chesapeake Bay. Development of imposex (the imposition of male characters on female snails) was assessed. Frequencies of imposex. Low environmental calcium blocks long-term memory formation in a freshwater pulmonate snail, the freshwater snail Lymnaea stagnalis (L.) is considered a calciphile and exhibits reduced growth and survival in environments containing less than 20 mg/l environmental calcium. Although it has no apparent effect on survival at 20 mg/l, reducing environmental calcium. Cohabitation enhances the avoidance response to heterospecific alarm cues in a freshwater snail, in aquatic habitats prey often show maximum responsiveness to predators when they are exposed to kairomones and alarm cues in combination. As alarm cues can derive from heterospecific as well as conspecific animals, prey may need to fine tune their responses. Multi-species interactions among a commensal (Chaetogaster limnaei limnaei), a parasite (Schistosoma mansoni), and an aquatic snail host (Biomphalaria glabrata, this study assessed the effects of a commensal, Chaetogaster limnaei limnaei, and a parasitic trematode, Schistosoma mansoni, on infection patterns and life-history responses in the aquatic snail Biomphalaria glabrata. Prevalence of infection was significantly higher. Cadherins and catenins in breast cancer, author links open overlay panelPamelaCowin Tracey MRowlandsSarah JHatsell. Show more. Not yet fully understood, but several key transcription factors with significant roles in breast cancer have been identified (Figure 3). The zinc-finger transcription factors Snail, SLUG. Preference Versus Performance: Body Temperature of the Intertidal Snail Chlorostoma funebralis, evolutionary theory predicts that, in variable environments, it is advantageous for ectothermic organisms to prefer a body temperature slightly below the physiological optimum. This theory works well for many terrestrial organisms but has not been tested. Dynamic chromatin modification sustains epithelial-mesenchymal transition following inducible expression of Snail-1, epithelial-mesenchymal transition (EMT) is thought to contribute to cancer metastasis, but its underlying mechanisms are not well understood. To define early steps in this cellular transformation, we analyzed human mammary epithelial cells with tightly regulated. Competitive displacement of a detritivorous salt marsh snail, here we examine the role of competitive interactions in controlling distributions of the most abundant omnivore-detritivore snails in East Coast US salt marshes (Melampus bidentatus and Littoraria irrorata). Both snails prefer to eat fungi growing on plant material. 100 of the world's worst invasive alien species: a selection from the global invasive species database, ramosissima) wedelia (Sphagneticola trilobata) yellow Himalayan raspberry (Rubus ellipticus) AQUATIC INVERTEBRATE Chinese mitten crab (Eriocheir sinensis) comb jelly (Mnemiopsis leidyi) fish hook flea (Cercopagis pengoi) golden apple snail (Pomacea canaliculata. Climateâ related change in an intertidal community over short and long time scales, more papers by this author. Sarah E. Gilman. And L. paradigitalis. Abundances of the southern snail Acanthina punctulata in the 1990s' surveys were compared to those of A. spirata (also southern) in Hewatt's survey. Elevated CO2 affects shell dissolution rate but not calcification rate in a marine snail, as CO 2 levels increase in the atmosphere, so too do they in the sea. Although direct effects of moderately elevated CO 2 in sea water may be of little consequence, indirect effects may be profound. For example, lowered pH and calcium carbonate saturation states. Sensory mediation of memory blocking stressors in the pond snail Lymnaea stagnalis, the great pond snail, Lymnaea stagnalis, is commonly used as a model species to study how stress affects the ability to form long-term memory (LTM); however, we still have little information about how the snail senses stressful stimuli. The osphradium is an external. Environmentally relevant stressors alter memory formation in the pond snail Lymnaea, stress alters adaptive behaviours such as learning and memory. Stressors can either enhance or diminish learning, memory formation and/or memory recall. We focus attention here on how environmentally relevant stressors alter learning, memory and forgetting. Cue association and antipredator behaviour in a pulmonate snail, Lymnaea stagnalis, associative learning may help to offset costs of unnecessary escape behaviour by providing accurate information about the current risk to potential prey. We investigated innate antipredator behaviour and cue association learning in naïve gastropods. Juvenile. Acute combined exposure to heavy metals (Zn, Cd) blocks memory formation in a freshwater snail, the effect of heavy metals on species survival is well documented; however, sublethal effects on behaviour and physiology are receiving growing attention. Measurements of changes in activity and respiration are more sensitive to pollutants, and therefore a better. Snail induction is an early response to Gli1 that determines the efficiency of epithelial transformation, gli family members mediate constitutive Hedgehog signaling in the common skin cancer, basal cell carcinoma (BCC). Snail/Snai1 is rapidly induced by Gli1 in vitro, and is coexpressed with Gli1 in human hair follicles and skin tumors. In the current study. Microgeographical variability in long-term memory formation in the pond snail, Lymnaea stagnalis, the ability to learn and form long-term memory (LTM) can enhance an animal's fitness, for example by allowing it to remember predators, food sources or conspecific interactions. Here we used the great pond snail, Lymnaea stagnalis, to assess whether variability among. Epithelial to mesenchymal transition: expression of the regulators snail, slug, and twist in pancreatic cancer, purpose: Epithelial to mesenchymal transitions are vital for tumor growth and metastasis. Several inducers of epithelial to mesenchymal transition are transcription factors that repress E-cadherin expression, such as Snail, Slug, and Twist. In this study, we aimed to examine.
