How Does Water Temperature Affect The Daphnia Magna Experiment

Freeman (2008) furthers Eckert et al’s argument by stating that the actin filaments of the muscle cell in organisms are able to intake ATP (adenosine triphosphate) faster and will move the organism faster when higher temperatures are imposed. This is because of an increase in enzyme reaction rates (Freeman 2008). These arguments can be applied to our experiment to help explain the trends observed. It can be argued that as the Gammarus setosus experiences the cold treatments, the organ of Bellonci senses the cold temperature, which in turn signals the organism to preserve its energy to protect itself; therefore, the organism will swim slower. In addition, the enzymes in the muscle cells of the organism, when experiencing the cold treatments, will have decreased ability to carry out enzymatic reactions, therefore inhibiting the uptake of ATP, which will cause the organism to swim slowly. Conversely, as the organisms are put into the heated treatments, the organ of Bellonci senses the heat, and allows the organism to swim faster, since it does not have allocate as much of its energy towards survival. Furthermore, the enzymes in the cells will be able to catalyze reactions more quickly, therefore allowing the organism to swim faster. However, when the temperature of the surroundings is too high, the enzymes will denature, therefore, reducing the activity rate of

In my experiment as the concentration of sugar increased the heart rate of the Daphnia decreased. The cause of this may have been to the possibility of having a defectuos daphnia. My prediction was that the more sugar concentration added the highest the Daphnia heart rate was going to be. It did affect my organism but not in a positive way if not in a negative way, by decreasing the heart rate of the organism.

The purpose of this lab report is to determine the effects of a different environment condition such as temperature on the consumption of oxygen and ventilation in goldfishes (Carassius auratus). The consumption of oxygen and ventilation rate was measured in goldfishes at different treatment levels inside the tanks; ~ 25°C and ~15°C in a 15 minute time interval for one hour. At ~ 25°C, the ventilation rates in the goldfishes were higher than at ~ 15°C and there was more oxygen consumption at ~ 15°C than at ~ 25°C. The results suggest that the ventilation rate is greater in high temperature than low temperature. Also, there is more oxygen consumption at lower temperature than at higher temperatures. This experiment shows that temperature is

The experiment could have had better results if done with multiple glow sticks. Make sure that the thermometer is correct in the measurement of the water’s temperature. It is important that you get your data correct.

The effects of MP exposure on life history parameters were tested in a 21-d reproduction test according to OECD guidelines at one concentration of each particles size: 1000 particles/L (0.1,1,10 µm), subjected to the environment concentration about 1.1 items/mL has been reported(Moore et al., 2011). In brief, there were triplicates for each control and treatment group an experimental series. Five neonates (< 24h) were incubated respectively in 50 mL medium at 22 ℃ under a 12:12 light dark cycle of 1600 lux and fed 4.2×104 cell/mL a day of the micro alga Chlorella vulgaris. The test medium was fully replaced every day along with calculating the cells of C.vulgaris the daphnia ate everyday by blood cell

For our experiment, we first filled three beakers up with water in different temperatures, such as; warm, room temperature, and ice. We then added three drops of red dye and placed one stick of celery in each beaker with water and red dye. We then waited 10 minutes, took the temperature again, which showed change and then we waited 10 more minutes. After

The change in temperature affects the respiration of goldfish. In goldfish, active metabolic rate decreases as temperature is lowered (Johnston and Dunn 1987). The goldfish breathes per minute is decreased as oxygen is required for this activity. A similar experiment conducted supports the result from this experiment that oxygen consumption decreases as temperature decreases (Fry and Hart 1948). The decrease in breathes per minute was observed as the temperature was lowered. The average breathes per minute decreased from 110 to 92 per minute when the temperature was lowered from 22 to 12. So, the null hypothesis that the change in temperature will not affect the breathes of the goldfish was rejected. There were some sources of error for this

Using cold water to decrease the temperature was effective in slowing down a goldfish’s rate of respiration. These findings are in agreement with previous research (Perey 2014). The null hypothesis, that decreasing temperature of the water environment would not affect the goldfish’s respiration rate, was rejected. As the temperature of the water environment decreased by two degrees every 2 minutes, to the beaker the goldfish was in, the number of breathing rate of the goldfish decreased at least 10 respirations each time. The biggest difference that was found between the initial temperature of 22 degrees and the decreased temperature of 20 degrees. The multiple trials that were ran constantly decreased, further supporting the results. The results

(Graph is attached on a separate piece of paper) During this experiment, there were five sections of a temperature-gradient tank that were all different temperature ranges; 2-7 degrees Celsius, 7-12 degrees Celsius, 12-17 degrees Celsius, 17-22 degrees Celsius, and 22-27 degrees Celsius. The fish who were originally removed from the same stock tank (22 degrees Celsius) were then placed in the temperature-gradient tank. The experiment’s purpose was to observe which temperature of water the fish prefered best and gravitated towards. After studying the results from the experiment, there is a definite difference between sections; the temperatures that ranged in the middle C section (12-17 degrees Celsius) were more preferable to the fish because

Conclusively, after completing this lab I reject the original hypothesis stating that the higher the temperature of the individual’s hand the more the Mysterious Red Fish will react. The inconsistency in the data recorded throughout the lab led me to believe that it is incorrect. To complete our quantitative data we did 3 trials. In those trials my partners and I measured the length of the Mysterious red Fish when it was lying flat and then measured it again after it reacted on our hands. The data proved to be unreliable, when the fish was on Alex’s hand 4cm of the 9.1cm long fish was in contact with her hand in the first trial. In the second trial, it went down to 3.5cm on her hand and went up to 6cm in the last trial. Furthermore Erica’s

The purpose of this experiment was to test the effect of the water temperature on a fish’s respiration rate. My hypothesis was: if the water temperature decreases, then the respiration rate will decrease because there is more dissolved oxygen in cooler water, thus, a fish would have a surplus of oxygen. I then did the experiment to prove this hypothesis. According to my group’s data table, when the fish was placed into warmer water, its respiration rate was 12 gill beats per 20 seconds. However, when the water temperature was lowered, the respiration rate also slowed down to 6 gill beats per 20 seconds. When looking at the class data table, the average respiration rate for fish placed in warmer water was 20 gill beats per 20 seconds, whereas

The results of the experiment support the hypothesis that heart rate will slow when immersed in cold water. The significance calculated supports this as well showing a significant difference between the warm water and cold water trails. With the hypothesis supported by this experiment this in turn supports the theory of the mammalian dive reflex.

At water temperatures between 8-10 degrees Celsius, individuals will demonstrate a decrease in heart rate the duration of holding breath while diving. With each progressive week, individuals will demonstrate an increase

In part A of the experiment we added 100 degree Celsius water to room temperature and tracked the temperature of the mixture to see how much it changed. Using this information we were able to calculate how much energy was given off by the how water and how much energy was absorbed by the cold water. The difference of the absolute values of these two values divided by the difference in temperature gave us the calorimeter constant. The calorimeter constant is an important value because it allow us to calculate how much energy is absorbed by the calorimeter in other reactions. Our calorimeter constant makes sense because it is a smaller value and with the colorimeter being Styrofoam, and insulator, the amount of heat absorbed by the calorimeter

The material needed to recreate this lab is one goldfish in a cup big enough for the fish to swim in, a bowl filled with water, one cup of ice, and one thermometer. Place the cup with the goldfish into the bowl filled with water. Measure the temperature of the water in the bowl with the thermometer to find the room temperature and after when you added the ice to cool the water down. The room temperature should be around 20 degrees Celsius. Wait for 3 minutes for the goldfish to adjust to the environment. Count the number of breaths of the goldfish per 15 seconds by counting the number of times when the gill cover open and close. Slowly added the ice to the bowl to cool down the water temperature. Repeat the process for 20 degrees Celsius, 17.5 degrees Celsius and 10 degrees Celsius.