This experiments purpose is to study the effects of manmade chemicals on daphnia. By observing 2-3 daphnia in 4 different environments I rated each Daphnia magna on a scale of 0 to 5 on how it affected their health. I averaged each of the daphnia’s heath based on their behavior and apperence. One pure water, then three other environments exposed to antifreeze, pesticides, and cigarette ash. After observing each environment for 30 minutes I discovered that cigarette ash is the most toxic to daphnia I rated their health at a 0 and antifreeze is the only chemical I tested that didn’t result in death I rated the daphnia exposed to antifreeze at a 2 due to the change in appearance and downfall of health .…
The effects of 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.…
The constant threat of a pipette submerging into their tank and cups may have traumatized them right as they were introduced into the solutions. Next time this experiment is performed, the Daphnia will be collected into groups of five a day before being submerged in the…
This results in a population of acclimated crayfish that are found in Medway Creek and many different environments with matching temperatures. Living in Canada, the crayfish must tolerate a very large range of temperatures, from freezing to hot temperatures, in order to be able to survive and live comfortably in. Temperature was found to be a factor affecting the rate of oxygen consumption by altering dissolved oxygen levels. As stated by Powell et al. (2006), there shows to be less dissolved oxygen in warmer waters, and these waters have been found to increase rates of ectotherms that are in the respective conditions, because in order to survive they must acclimate to their environment (Daniels and Ermitage, 1968).…
Name:Neko Science Fair Paper Daphnia Magna are small water fleas that are native to Minnesota. They are an indicator of good water quality ( Science buddies,2010 ). Daphnia Magna are small enough to be eaten by dragonflies, and are food for many small to medium sized fish. The reason that we should be paying attention to Daphnia Magna is because of pollution in our lakes. This pollution can affect a lot of actions that we do in our daily lives.…
Once the experiment was completed, the results of the experiment were reviewed. The null hypothesis was rejected and the alternative hypothesis, change in temperatures does effect goldfish respiration rate, was accepted. Goldfish are considered ectotherms which mean that their body temperature changes as their environment temperature changes (White and Campo 2015). Ectotherms have two aquatic ectotherm strategies they use to cope with cold temperatures. The goldfish in this experiment used the first strategy, which is to slow down their metabolism.…
Measurements from 0 to 30 minutes were excluded from our data because when compared to the data from times 30-60 of both cold and warm acclimated crayfish, it was evident that the crayfish were undergoing physiological stress. This is likely due to how the crayfish were in the same tank compensating for two weeks and were then moved to conduct experiment. There is an expected time where the crayfish experience stress in a new environment which is not reflective of their adaption to new temperatures. In the case of the crayfish worked with in this experiment they took longer than usual to adapt to their new environment The oxygen consumption levels increased during the 30-60 minute time period for both the warm and cold acclimated crayfish due to the absent of threat, so they ended up…
The effect of caffeine on 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.…
My group is experimenting on a Daphnia. The purpose of our experiment is to test the Daphnia’s with different liquids and see how heart rate increases,decreases or even kill the Daphnia. The variable in our experiment is changing the water content and seeing what the heart rate. The experiment on the Daphnia matters because if we were to have types of elements in lakes that can possibly kill the Daphnia’s, there can be a possibility there species could end. What the Daphnia prefers is open fresh water in their habitat.…
Just north of Key Biscayne in sunny Miami, Virgina Key is a protected barrier Island in the Atlantic ocean. Consisting of 863 acres of land, it was once much larger, extending into the Ft. Lauderdale area. Between 1835 and 1838 hurricanes eroded the beach, creating inlets and dividing the island in two. The other portion became Fisher Island, which sits at the southernmost tip of Miami Beach. Virgina Key was a part of the civil rights movement.…
1. Planning for changes is difficult due to the natural fluctuation of the great lakes water levels but there are factors that are certain that the levels as well as the region are changing negatively due to climate change (Kahl & Stirratt, n.d.). The water levels of the Great Lakes have declined over the past decades (“Climate Change Indicators: Great Lakes Water Levels and Temperatures”, 2016). Climate change is a change in typical weather that lasts longer than usual (“Climate Change, Health, Environmental Justice”, n.d.). It typically comes along with the warming or cooling of the average temperature as well as extreme weather.…
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 attempt to avoid it. Pesticides can also decrease the reproductive success of aquatic animals as demonstrated by the experiment conducted by Agatz (2013).…
Ocean Acidification-Effect on Squid Ocean acidification is a direct result of rising atmospheric carbon dioxide CO2 concentration due different type of human activities, such as burning fossil fuels and deforestation (Halpern). The world’s ocean surfaces have gradually become more acidic due to absorption of excess anthropological carbon emissions throughout history. Since the Industrial Revolution during 19th century, the carbon dioxide level has been dramatically increasing. In addition, the CO2 concentration level has reached a constant of 280 ppm during Pre-Industrial and will reach 700ppm by the year of 2060 under the projections (Cooley). Figure 1 shows that as the carbon dioxide levels increase in ocean, the pH level decrease.…
This causes a destruction of all the species in that area. The species that I chose to research on is the Blue Catfish. This is a species…
Osmoregulation in Cyclograpsus and Plagusia crab species Hartzer, A.M, 19971613, First year BSc student, Stellenbosch University, South Africa Abstract Osmoregulatory processes within two crab species are investigated in this practical. The Plagusia, an infratidal species, and Cyclograosus, an intertidal species, are investigated to determine which is an osmoregulator and which is an osmoconformer. The haemolymph was extracted after allowing the species to acclimatize to varying concentrations of seawater. The comparative melting-point technique was used in the experiment where capillary tubes were used to collect samples of the seawater and blood, then frozen and put into an alcohol bath.…