Daphnia Essays

  • Essay On Daphnia

    734 Words  | 2 Pages

    What is the “water flea?” The most scientific name for this little water flea is called the Daphnia, a very small planktonic crustacean that measures up to five millimeters long. Daphnia are part of the Cladocera family, which are small crustaceans of all sorts commonly called water fleas. The Daphnia are called water fleas because the movements they make are very similar to the way fleas move around. Daphnias “inhabit most types of standing fresh water except for extreme habitats, such as hot springs

  • Daphnia Hypothesis

    699 Words  | 2 Pages

    Introduction Daphnia are planktonic crustaceans2, more commonly known as a water flea. They are microscopic and most commonly found in ponds or lakes. These fleas have flat leaf-like legs that help them move through the water2. Male Daphnia are smaller than female but have larger antennules and their first legs have hooks that are used for clasping2. In spring and summer female Daphnia are more commonly found than male1. Female Daphnia can fertilize without male1. A male Daphnia is more common

  • An Investigation to Show the Effect of Temperature on Daphnia

    1268 Words  | 3 Pages

    An Investigation to Show the Effect of Temperature on Daphnia Plan: I will submerge some daphnia contained in a test tube in water of differing temperatures and measure their subsequent heart rates. Hypothesis I think that the heart rate of the daphnia will increase up until around 40ËšC at which point most of the daphnia's enzymes will have denatured and rate of metabolism will have stopped or decreased sufficiently to have stopped the daphnia's heart rate. Apparatus list Test

  • Chronotropic Substance Analysis

    1681 Words  | 4 Pages

    group members that had gotten the microscopes had received the daphnia magna as well. After receiving the daphnia magna in the pipette, place it on the depression slide. Note: if there is too much liquid on the slide with the daphnia, it will have more room to run around and a person will not be able to receive an adequate reading of the heart rate. So a person will need to remove some of the liquid, leaving just enough so the daphnia does not die. Once this is done place the slide on the microscope

  • Ibuprofen

    859 Words  | 2 Pages

    Ibuprofen Abstract The project that I chose to research was the effect of Ibuprofen on the heart rate of the daphnia. The reason that I chose to do this was because many people in society use over the counter pain killers without really understanding any of the long term effects of this medicine other than clearing their aches pains, and swelling. One of the leading drugs on the market today is Ibuprofen which you may know as Motrin or Advil. Both drugs are identical except for quantity and price

  • Daphnia Essay

    823 Words  | 2 Pages

    Investigating the effect of caffeine concentration on the heart rate of Daphnia Introduction Daphnia, commonly known as water fleas, are tiny crustaceans which live in water. The diameter of adult female bodies is approximately 3-5 mm. The upper skeleton is transparent, making the internal organs visible. This allows the heart rate of the Daphnia to be calculated by observing them under a microscope. Background Caffeine occurs naturally in some plants such as coffee beans and tea leaves. Caffeine

  • Daphnia Lab Report

    839 Words  | 2 Pages

    genus Daphnia to chemical stimuli and to examine human responses to different stimuli. A stimulus is an incentive; it is the cause of a physical response. Stimuli can have a physical or chemical change; an example of a physical change is a change in temperature and sound. An example of chemical change would be changes in hormone levels and pH levels. Muscular activity or glandular secretions are responses that occurs when stimulus information effects the nervous and/or hormone system. Daphnia is a

  • Case Study Of Daphnia

    1436 Words  | 3 Pages

    Introduction Daphnia are a common freshwater zooplankton, they are a member of the crustacean family. Daphnia are ectothermic animals which means their core body temperature fluctuates depending on the temperature of their environment. Temperature has a powerful effect on the biological processes of ectothermic animals. Acute changes to water temperature can have major impacts upon genetic growth and development as well as physiological and metabolic processes. Changes in temperature that remove

  • Daphnia Ethanol Experiment

    903 Words  | 2 Pages

    Introduction Numerous experiments have been conducted to analyze the influence of ethanol on different sections of the human brain and how different concentration levels affect behavior. For example, it has been observed that excessive amounts of ethanol affect the cerebellum. As we know, the cerebellum controls balance and coordination, but when exposed to excessive amounts of ethanol, an individual is more prone to lose balance. Furthermore, the hippocampus, a part of the brain associated

  • Daphnia Magna Exposed To Perchlorate

    546 Words  | 2 Pages

    When Daphnia magna were exposed to perchlorate, their heart rates were raised. Their response to perchlorate was directly dose related. See Table 1 and Figure 1. In 0.001 M (0.014%) perchlorate solution, the average heart rate (AHR) of Daphnia magna did not show any significant difference from that without perchlorate. This was most likely because the dose was not strong enough to elicit a short-term effect. See Table 2 and Figure 2. After 24 hours back in cultured water, one Daphnia was dead, but

  • Investigating the Effect of Alcohol on Heartbeat of Daphnia

    2282 Words  | 5 Pages

    the Effect of Alcohol on Heartbeat of Daphnia Daphnia are the organisms that are involved in this experiment to find out what effect alcohol has on their heartbeat. It is easy to study the effects of alcohol on the heart of Daphnia as the organ can be easily seen through the transparent body of Daphnia. The number of heartbeats may be counted before submersion in alcohol and after submersion in alcohol to investigate the effect of alcohol. Daphnia belong to the Phylum Arthropoda and are

  • Daphnia Heart Rate Lab Report

    1236 Words  | 3 Pages

    Heart Rate of Daphnia Daphnia is the name of a group of small, aquatic crustaceans commonly called 'water flies'. Because their exoskeletons are clear it is possible to watch daphnia hearts without cutting them open. This also allows the changes in daphnia heart rate to be studied quite easily. Hypothesis I predict that a daphnia should have a heartbeat of 190 to 200 per minute. However this would also be dependent of the room temperature as daphnias are cold blooded

  • Study of the Four Lakes in the Yahara Chain

    1158 Words  | 3 Pages

    the water quality enhancement should be in balance with the managements in all the chain. The parameters used in this research were: 29-33 years of data for P inputs, outputs, initial concentrations for each lake and the activity of zooplankton (Daphnia pulicaria) only in for the two upper lakes (Lake Mendota and Lake Monona). The study site included four lakes in the Yahara chain: Mendota, Monona, Waubesa and Kegonsa. The Lake Mendota is the largest and deepest of all 4 lakes, it has an influent

  • The Role of Competition and Predation in Ecology

    563 Words  | 2 Pages

    Competition and predation are two key factors that affect the stability of an ecosystem, such as a lake. There are three theories on the affects of competition. Competition may lead to competitive exclusion, stable coexistence, or niche differentiation. It has been shown that in marine environments, species are strong competitors for both light and nutrients and thus competition leads only to competitive exclusion (Passarge et al. 2006). The competitive exclusion principle states that if two

  • Functional Response in Relation to Predator-Prey Interaction

    955 Words  | 2 Pages

    Predation refers to the consumption of one organism known as the prey by another known as the predator in which the prey is alive when the predator first attacks it. Predation is beneficial to the predator and harmful to the prey. This is a broad group which covers a wide variety of interactions and numerous types of predators. For the purpose of this essay we will concentrate on classifying predators according to their individual taxonomic and functional responses. When the predator and the prey

  • Flatworms

    639 Words  | 2 Pages

    NOTES Characteristics Flatworms are parasitic unsegmented, bilaterally symmetrical worms that lack a coelom but that do have three germ layers. Some forms are free living but many are parasitic. Flatworms have a cephalized nervous system that consists of head ganglion(brain), usually attached to longitudinal nerve cords that are interconnected across the body by transverse branches. Flatworms lack a respiratory or circulatory system, these functions take place by absorption through the body wall

  • Climate Change And Falsification Essay

    737 Words  | 2 Pages

    false through observation or experimentation. There are many situations in real life where a hypothesis or statement can be falsified. For example, in my Biology 165 Lab course, I made a hypothesis that alcohol would raise the heartrate of the Daphnia. When the experiment was completed, my hypothesis

  • Parasites and their Virulence

    2298 Words  | 5 Pages

    Parasites and their Virulence Why do some parasites kill the host they depend upon while others coexist with their host? Two prime factors determine parasitic virulence: the manner in which the parasite is transmitted, and the evolutionary history of the parasite and its host. Parasites which have colonized a new host species tend to be more virulent than parasites which have coevolved with their hosts. Parasites which are transmitted horizontally tend to be more virulent than those transmitted

  • Antoni Van Leeuwenhoek and His Contribution to Microbiology

    1147 Words  | 3 Pages

    No one would ever expect a Dutch fabric merchant to be the first to discover some of the most abundant organisms in the world. Europe was in the midst of a Scientific Revolution as part of the Renaissance. At this time, new scientific discoveries were being made with the rise of scientists such as Galileo and Newton. Another prominent name in this revolution was Antoni van Leeuwenhoek. Leeuwenhoek first worked in a fabric shop in Delft, Holland in the mid-1600s. Leeuwenhoek used his microscope to

  • Endocrine Disrupting Chemicals (EDC’s) and the Environment

    2636 Words  | 6 Pages

    INTRODUCTION The endocrine system of animals is a main source of bioregulatory compounds. Hormonal actions regulate all aspects of animal life: reproduction and development, digestion, metabolism, behavioural responses etc. (Hertenstein 2006, Norris 2007). Hormones and glands of vertebrate and invertebrate endocrine system differ in structure and function, but their main regulatory role remains conserved. However, the balance among the environmental clues, hormonal signals and organisms’ responses