This experiment is performed to test how Daphnia react when exposed to differing levels of copper sulfate so that we may understand what effects it has on underwater organisms. One possible hypothesis is, if the levels of copper sulfate in their environment rise, more of the Daphnia will die because copper sulfate is toxic. Daphnia are members of a collection of small crustaceans that are commonly called water fleas that are commonly found in small lakes and ponds. They reproduce through parthenogenesis, only creating male eggs once food becomes scarce. They eat algae, bacteria, and yeast. They also develop and reproduce quickly, making them ideal for testing the health of an aquatic ecosystem. They rely on the sugars that they obtain from …show more content…
One error that was made during the experiment is that the Daphnia would be shaken as the petri dish was moved around. The table the petri dish was lying on would also be bumped while the experiment was being performed. If the experiment was performed again, it could be ensured that the petri dish containing the Daphnia is securely fastened in a static location where it would be unable to be shaken. Doing so would ensure that their environment is disturbed the least amount possible, which would keep the Daphnia from becoming stressed. This, in turn, would give the most accurate possible data as to the lifespan of Daphnia in different concentrations of copper …show more content…
The daphnia tended to die more quickly in higher concentrations of copper sulfate, which shows that the compound has negative effects on the aquatic life in the area where it is used. Due to the inherent toxicity of copper, the compound could harm humans through the water supplies in which it is used if the compound is not properly filtered out. The daphnia’s heart rate tended to increase over time, showing that the change in their environment causes them stress, which would only make them die more quickly. While some may say that our water that copper sulfate doesn’t come to affect humans because we don’t live in the water that the compound is used in, this statement is false because copper sulfate can enter our bodies when we consume affected organisms, which can cause harm to people more and more over time. Overall, copper sulfate is a risky compound. It should not be used as an algaecide in ponds and water
A variety of factors can change the heart rate of Daphnia. According to Richard Handy (2012), “The heart rate (which can be up to 300 beats per minute) can be monitored and counted in different conditions – for example changing water temperature, or changing the type
The following experiment determines the effects of 50 ml tobacco extract on the heart rate of a crustaceans Daphnia Magna. Daphnia represents a small group of aquatic crustaceans, also known as “water fleas”, with clear exoskeletons, which makes studying their heart rate effortlessly. The heart rate can be observed using a microscope and counted under varying conditions. (Pritchard, J. B.) In this case, changing the type and concentration of natural plant substances reveals the effects of the plant defense mechanisms on the specimen of Daphnia Magna.
Steven Ho Biology Lab 132 Marian Wahl 4/14/15 Caffeinated Planarians vs. Spring Water Planarians Introduction: Planarians are free-living, freshwater flatworms that are found in clean, unpolluted water. Planarians live in small, shallow, slow-moving streams under stones or leaves. Planarians cannot live in chlorinated water because it is toxic to them and can kill these animals. Planarians are also able to regenerate themselves if their bodies happens to completely tear apart.
Villegas-Navaro, A., Rosas-L, E., & Reyes L., J. (2003). The heart of Daphnia magna: effects of four cardioactive drugs. Comparative Biochemistry and Physiology Part C: Toxicology and Pharmocology , 127-134. The purpose of this article was to test four cardioactive drugs (ouabain, verapamil, metaproterenol and metoprolol) to see what effects they have on the heart rate of Daphnia magna.
Abstract The purpose of this lab was to determine the overall health of the aquatic community at Lake Wheeler. Various water and sediments samples were taken to be tested and observed in a number ways to reach a conclusion about this lake’s condition and fitness. The dissolved oxygen content, pH level, water temperature, and water clarity were also tested with the use of several different tools, ranging from a Secchi disk to pH strips and more complex contraptions like the Schindler-Patalas trap.
In the 1950s and 1960s , something weird happened in the estuaries next to the long island sound , new York and Connecticut . Birds of prey , ( eagles ) fed on fish in the estuaries had soaring concentrations of the insect killer DDT in their bodies. Even though when the water in the estuaries was tested , it had low concentrations of DDT. In consequence , poisons that dissolve in fat (such as DDT) , can become more intense as they upgrade up in the a food chain in a process called biological magnification. When the pesticide mixes with the water , algae and bacteria are effected with the poison .
The US sprays 16 million acres of Naled every year which has been linked to neurological defects which raises concern. While the insecticide is approved to be safe for crops and water supplies, it is recommended to wash produce and avoid direct contact. Although there is little risk for the environment while using Naled, wildlife is not as safe. There is threats to aquatic and terrestrial wildlife. The risks begin before the insecticide has fully broken down which does not persist for long periods of time.
Pollution affects them because they can eat garbage that is in the water, and oil spills can pollute their water and kill them. The Warty Frogfish is a very interesting sea creature. It lives in waters that rocky and shallow. They live in Coral Reefs as well. The Warty Frogfish was discovered in 1840 in Hawaii.
From the above data, one can see that the greater the concentration of caffeine in the water applied to the Daphnia, the higher the average heart rate in beats per minute of the water flea. For example, at 0% concentration of caffeine the average heart rate of the Daphnia was 165 bets per minute however you can clearly see a difference in heart rate with the Daphnia when placed in a 0.5% caffeinated solution as the average heart rate was 268 beats per minute. An increase of 103 beats per minute on
“These water bodies supply our drinking water, water for agriculture and manufacturing, offer opportunities for recreation and provide habitat to numerous plants and animals.” Pollution is degrading our waters and one of the best forms to study the change in water quality is testing contaminants in fish that inhabit
Copper is an essential trace mineral for the body. Copper is a core component of proteins and metalloenzymes which perform essential metabolic functions. It is necessary for proper growth, development and maintenance of bone, connective tissue, brain, heart and other body organs. Copper is involved in absorption of iron, metabolism of cholesterol and glucose. Copper has a role in synthesis and release of proteins and enzymes involved in cellular energy, nerve regulation, blood clotting and oxygen transport.
Copper Cycle Lab Report Ameerah Alajmi Abstract: A specific amount of Copper will undergo several chemical reactions and then recovered as a solid copper. A and percent recovery will be calculated and sources of loss or gain will be determined. The percent recovery for this experiment was 20.46%.
Corotto, F., Ceballos, D., Lee, A., & Vinson, L. (2010). Making the Most of the Daphnia Heart Rate Lab: Optimizing the Use of Ethanol, Nicotine & Caffeine. The American Biology Teacher , 176-179. The purpose of this article was to test the effects of chemicals on Daphnia magna.
Introduction The goal of the experiment is to examine how the rate of reaction between Hydrochloric acid and Sodium thiosulphate is affected by altering the concentrations. The concentration of Sodium thiosulfate will be altered by adding deionised water and decreasing the amount of Sodium thiosulphate. Once the Sodium thiosulphate has been tested several times. The effect of concentration on the rate of reaction can be examined in this experiment.
Considering the fact that triclosan is commonly found in cleaning and cosmetic products, which eventually are washed down the drain, it is easy for the chemical to find its way into streams- the habitats of aquatic wildlife. Oftentimes, wastewater treatment plants cannot remove the discharge- and this poses health risks to the fish, algae, and invertebrates there. Breeding