Page 1 of 2 - About 19 Essays
  • Daphnia Experiment Reaction Paper

    Subject Organisms For this experiment, I used Daphnia magna and Daphnia pulex that was cultured from stocks from Aquatic Bio Systems Inc. (Fort Collins, CO). Each species was cultured individually in 900 mL glass jars filled with moderately hard water. I created moderately hard water using the recipe as follows: 0.473 g CaSO4 , 0.959 g NaHCO3 , 1.223 g MgSO4 • 7H2O , and 0.039 g KCl per 10 L of deionized water. All references to water for the remainder of the paper refers to moderately hard water unless otherwise stated. These daphnid cultures were fed 2 mL of algae (Selenastrum capricornutum) containing 3.0 x 107 cells per mL on Monday, Wednesday, and Friday. The water was changed every Friday. Once a month, 1 mL of a yeast and trout chow…

    Words: 1068 - Pages: 5
  • Alcohol And Heart Rate Experiment

    how water flea, (Daphnia magna) a transparent aquatic organism whose heart can be easily identified using a compound light microscope, was used to study the effects of caffeine and alcohol on heart rates. According to the research alcohol was observed to have caused a decrease in the heart rate of Daphnia magna while caffeine caused an increase in the heart rate. Introduction Daphnia magna is the name of a group of small aquatic crustaceans commonly called water fleas. They belong…

    Words: 1510 - Pages: 7
  • Thermal Niche Experiment

    flea, called Daphnia Magna. All of this matters and is important to know about because it is key to understand the background of the experiment beforehand. This investigation relates to past research based on the…

    Words: 943 - Pages: 4
  • Daphnia Pesticide

    Discussion Our results supported the alternate hypothesis that Atrazine affects the geotactic movement of Daphnia (Table 1). The pesticide we used disrupted the natural behaviors of Daphnia, and thus affected their performance. These results were expected since Atrazine is a powerful weed –killer that have the abilities to disrupt the nervous system in human and animals, this is why the Daphnia displayed a vertical movement when they placed in the Atrazine solution, which was an…

    Words: 423 - Pages: 2
  • Essay On Daphnia

    home. Some of the biggest pollutants that effect our water systems today are antifreeze from cars, cigarette ash and not to mention pesticides that run off from the fields. We know the effects of these harmful chemical substances can be deadly to humans but how does it alter the lives of the creatures living in the water? Some of the smallest living species in the water is known as Daphnia Magna. Similar to the size of a flea, how would chemicals so harmful to humans react to something as small…

    Words: 497 - Pages: 2
  • Daphnia Lab Report

    The Effect of pH levels on the Motility of Daphnia in Lake Ecosystems Introduction: The production, transportation, and use of chemicals by chemical industries can result in chemical pollution. This leads to a harmful effect on ecosystems and their balance of life (Linlin, Chen, 2012). The pH levels of aquatic environments are important because it affects the physiology of animals by changing their behaviors. The ion concentrations associated with the water and the organism’s survival can also…

    Words: 1291 - Pages: 6
  • Daphnia Caffeine Experiment

    the heart rate of Daphnia pulex Introduction In this experiment the effect of caffeine on the heart rate of Daphnia will be tested by use of a microscope and caffeine solution. Daphnia pulex is a crustaceous animal found in the ocean. There internal organs can be visible to observe because their body is translucent. This would be interesting because we could see how the effect of caffeine effects the heart rate of humans as well. Carrie miller from university of Michigan states on the website…

    Words: 491 - Pages: 2
  • Daphnia Magna Experiment

    caffeine on Daphnia magna Lee Phan Lab Section: P0501 1000587723 1. Materials and Methods: Preparation: Clean 3-well specimen chambers were kept in ice and a cooling chamber was then prepared to be put under the microscope, by filling it with ice and a small volume of water. This was done to ensure the temperature would remain around 15 degrees Celcius, which could keep Daphnia magna efficiently cool. Furthermore, the different concentrations were prepared in separately labeled eppendorf…

    Words: 607 - Pages: 3
  • Daphnia Heart Rate Lab Report

    Daphnias affected Heart Rate This lab experiment was conducted on Daphnias to test the chemical effects on its heart rate. In this experiment we determined the effects of caffeine and alcohol on the small organism. If the Daphnia is submerged in alcohol the heart rate will slow down, as if it’s submerged in caffeine it will speed up. The experiment measured how the stimulant caffeine or alcohol affected the Daphnia. The objective was to see how alcohol and caffeine would affect the…

    Words: 392 - Pages: 2
  • Summary Of Daphnia's Heart Rate

    to test whether or not the heart rate of a daphnia was effected by three different solutions being added: alcohol, lactic acid and, caffeine. We determined that when alcohol was added the heart rate would decrease. When lactic acid was added the heart rate would decrease, as well. When caffeine was added the heart rate would increase. We determined that alcohol would slow the heart rate because it is a depressant. Since humans that drink alcohol suffer from a depressed cardiovascular system and…

    Words: 1193 - Pages: 5
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