Effect of Temperature on the Rate of Movement of Gammarus Stosus

This lab was conducted with the purpose of confirming the trait of homeostasis among goldfish. During the experiment, it was recorded that the fish would increase gill movement when placed in colder water two out of the three trials. However, the results showed no significant difference in gill movement in various temperatures of water. This has very little effect on the broad field of science since our only three trials were performed and may have included human error in the trials.

The temperature decrease results in alterations of the autonomic sympathetic response[11] and in impaired conduction velocity of the electrical signals through the

Ectothermic animals are animals whose body temperature is affected by their surroundings. This means that if the environment is cold the animal will be cold. If the environment is warm the animal will be warm. This is because the animal doesn’t have the capability of regulating its body systems to keep a constant body temperature. When an ectothermic animal is cold, its heart rate will lower. When the animal is warmer, the heart rate will raise – as long as the temperature isn’t sufficiently high to harm the animal. (Campbell, 2005)

At the conclusion of the experiment, the two hypotheses were reviewed. Because the water temperature did affect the normal respiration patterns of the goldfish, the null hypothesis was disregarded and the alternative hypothesis was accepted. From the results of this experiment, it was concluded that although other environmental factors could play

When one refers to the temperature of a system, it is the determination of the internal energy contained within the system. The kinetic energy theory describes that heat is a measure of how energy is transferred from one system to another. Increased heat absorbed by a system, the more rapidly the atoms within the system begin to move, and thus the greater the rise in temperature. Chemical reactions are directly influenced by temperature because increasing the temperature increases reaction rates because of the large increases in the number of high energy collisions. There are several biological process that are directly affected by temperature, such as: digestion and cell respiration. Temperature affects digestion by altering the activity of digestive enzyme. With cell respiration, temperature alterations affects the cell respiration

direct calorimetry. Furthermore, the amount of oxygen in the chamber reveals the amount of cellular respiration of the organism. While also, test the effects of decreasing oxygen, and later increasing the heat on the metabolic rate of goldfish. I hypothesize that an increase in temperature will increase their metabolic rate

Temperature had a direct effect on oxygen consumption of crayfish, Orconectes propinquus. Crayfish acclimated to warm temperature (20 to 25 C) had a mean mass of 8.25g +/- 1.05. Crayfish acclimated to cold temperature (3 to 5 C) had a mean mass of 10.61g +/- 0.77. Oxygen consumption rates of 30-60 minute treatments were used and there was no significant difference between the two different treatments (t=0.48, df=58, P=0.70). The data from 0-30 minutes were not used because the crayfish were disrupted by transportation and the data were not normally distributed. The Q10 value was 1.05, representing that there was full compensation for oxygen consumption for the crayfish at two different acclimated temperatures. The oxygen consumption of crayfish was not affected significantly by two different temperatures (Figure 1).

- To test this hypothesis my experimental approach would be testing different bodies of water or testing one and just testing different areas while tracking the fish.

For the temperature treatment, it was decisive in that the A. franciscana showed a steady increase in concentration from section 1 to 4. This expands on the hypothesis that suggests A. franciscana prefers an optimum temperature between 20-24 ̊ C because from the results of the experiment A. franciscana seemed to prefer even higher temperatures. Al Dhaheri and Drew (2003) state that A. franciscana stop reproducing at temperature above 30 ̊ C and compared to the experiments results. It can be concluded that A. franciscana prefer warmer temperatures, but reproduce at lower

Hypothesis: If the temperature (I.V.) of materials in the reaction are increased, the reaction time (D.V.) will decrease.

We have noticed in other experiments that smaller animals have a higher surface-to-volume (SA/V) ratios than larger animals with a lower SA/V. After reviewing through articles, we hypothesized that endotherms with small bodies will have a higher metabolic rate than endotherms with large bodies. We tested this by making 6 clay cubes (different sizes) and placed them in ice for 10 minutes and measured them in 2-minute intervals. Our results supported our hypothesis because the larger clay with the smallest SA/V had the slowest cooling rate while the smallest cube with the higher SA/V had the fastest cooling rate.

The principal objective of this study was to determine how temperature affects the activity of

In testing the respiration rate of two crayfish, one smaller than the other, 100 ml of water are placed in three separate beakers. One a control, two for the different crayfish. The separate crayfish are then measured for their volume. This is done by placing 50ml of water in a 300ml graduated cylinder, the placing each crayfish in the graduated cylinder, noting the increase in volume, that is the crayfish’s volume. The crayfish are then placed in their individual beakers. The beakers are then covered with Para film and allowed to sit and respire for 15 minutes. After 15 minutes the crayfish are removed and returned to their water tanks. Four drops of phenolphthalein are added to each beaker. Nine test tubes are obtained, 3 test tubes for

When an endotherm is subjected to severe cold it is liable to lose heat energy but this can be counteracted in a number of ways;

Measure 2 cm on any curved side part of each dish and mark it. Cut this two centimetres