Page 1 of 33 - About 328 Essays
  • The Effect Of Crab Predation On Snail Shell Synthesis

    Evolution by natural selection and predator induced phenotypic plasticity are mechanisms that have been proposed to describe the effect of crab predation on snail shell thickness. Biologist Robin Seeley hypothesized that the periwinkle populations of New England evolved by natural selection as the European green crab was introduced to the area (Seeley, 1986). The three requirements for evolution by natural selection are that there is variation among a population, the variation is partly hereditary, and certain variants are able to survive to reproduce at higher rates than others. Once these three conditions are met, it is believed that the snail population will evolve toward thicker shells. A simulation was used to model the distribution of…

    Words: 1175 - Pages: 5
  • Causes Of Schistosomiasis

    source of morbidity and mortality for developing countries in Africa, South America, the Caribbean, the Middle East, and Asia (LAPA***). In these endemic areas, there are no resources for access of fresh drinking water and adequate sanitation. Therefore, human feces are the main source for spreading of Schistosomiasis. The causative agent of Schistosomiasis is Schistosoma, which is caused by a parasitic worm or a eukaryotic fluke (Colley, 2014). The parasites that bring about schistosomiasis…

    Words: 816 - Pages: 4
  • Characteristics Of A Snail

    Slow as a Snail, But Fast as 1-2-3 “My son loves to crawl around with this toy!! It does fall over a little bit but that is completely fine because my baby loves to look at himself in the little mirror. Overall, this is a great toy and I would buy it as gifts for other babies” (“Fisher-Price”, 2016). Description The Fisher-Price Go Baby Go! 1-2-3 Crawl-Along Snail has colors that contrast with one another to help give a distinction in the different parts of the snail. The head of the snail is…

    Words: 2406 - Pages: 10
  • The Homeless Snail Analysis

    SLUG The Homeless Snail INTRODUCTION I am writing this introduction… Why am I writing this myself, you may well ask,…… alright I will tell you anyway, I don’t know any famous authors who would write it for me, in fact, I don’t know any authors and why would I, I don’t read very much and actually I’m not very keen on books and since I don’t read their books why would they read mine or introduce it. I remember, as a child, somebody asking me if I would like a book for my birthday, I replied, “I…

    Words: 5471 - Pages: 22
  • Mangrove Snail Essay

    {draw:frame} {draw:frame} {draw:frame} {draw:frame} {draw:frame} Calculating abundance of organisms Results We can calculate the total number of crab holes in the area by using the formula shown above where; Average number in quadrat = 23.9 {draw:g} {draw:g} {draw:frame} {draw:frame} *Adaptations of the grey mangrove *and the mangrove snail the grey mangrove (avicennia marina) _ {draw:frame} _The pneumataphors form an Ariel root system and…

    Words: 1019 - Pages: 5
  • Snail Production In Nature Lab Report

    people recognize it by how fast they burn off food to create energy. Some people have a fast metabolic rate, others have a much slower energy rate. Today, we are going to measure the metabolic rates of 6 different organisms and situations to test who has a higher metabolic rate than the other. We will test this by seeing how much carbon dioxide is produced in these different situations and compare them to each other. During today 's experiment, we want to see the affect certain environments, as…

    Words: 1742 - Pages: 7
  • Darwinian Snail Lab Report

    Darwinian Snails: Introduction The flat periwinkle is a small snail that lives on seaweeds growing on rocky shores in New England (McRae 2016). The scientific name of the periwinkle snail is Littorina obtusata. They were first introduced to the Atlantic Coast during the 19th century. These snails are known mainly for a morphological trait, the variation of shell thickness within the population. Several studies have been done already to study the evolution of the periwinkle snails shell…

    Words: 729 - Pages: 3
  • Natural Selection Exercise Lab

    periwinkle snails with various sizes in shell thickness. In Exercise 1 of the simulation, the starting population of snails was 50. To begin the simulation, I was to act like a European green crab and select which snails from the population I wanted to eat by clicking on each snail. I was to eat snails until the population was at 25. Once I had eaten my meal, the crab was to go away for a while to allow the snails to reproduce in order to get the population back up to 50 snails. Once the crab…

    Words: 616 - Pages: 3
  • Abiotic Factors

    due to the change in food habit of predator which they feed on less prey. Thus, the communities between organisms are dependent on each other in their living environment and the equilibrium between the communities is used to biotic and abiotic factor. For this assignment organized, an aquatic ecosystem of freshwater was set up using one aquatic plants and five different aquatic animals. Elodea act as the producer in this main food web while the aquatic species used were small Koi, Ghost shrimp,…

    Words: 1920 - Pages: 8
  • Bellamya Invasion Essay

    habitats and food webs. The Chinese mystery snail (Bellamya chinensis), referred to as Bellamya, is an understudied invasive species that is becoming more abundant in the fresh water lakes of North America and poses a threat to the ecological community of the Great Lakes. Understanding how Bellamya can effect lake ecology is critical to preventing the possible extinction of native snail species and the degradation of lake habitats. A study conducted by Haak et al. (2017) aimed to determine the…

    Words: 783 - Pages: 4
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