catfish

This lab was about how a goldfish’s breathing rate changes in different temperatures in order to maintain homeostasis.

The purpose of this experiment was to measure the metabolic rate of pill bugs and crickets. I indirectly measured the metabolic rate of each organism by calculating their respiration rates. In crickets, gas exchange is accomplished via a tracheal system [Contreras, Bradley, 2010]. Pill bugs have pleopods, gill-like respiratory organs [Gibbs, Smigel, 2008]. My hypothesis was that the crickets will have a faster respiration rate than the pill bugs. I used a respirometer to measure the oxygen consumption of pill bugs and crickets. After plotting the data, I used the slope to obtain the respiration rate. The respiration rate per gram of organism for the pill bugs was 0.0025 mL/min./g. The respiration rate per gram of organism

Table 2: Mann-Whitney U statistical testing for the difference in average heart rate of Daphnia before and after the addition of aged water:

Secondly, the human body, crayfish, earthworm, and frog also have many similarities and differenced of how their respiratory system works. The crayfish respiratory system is the least complex. Crayfish have gills, which are used to release carbon dioxide and to pick up oxygen, by having a constant flow of blood. Frogs consist of nostrils and larynx, which opens up two lungs. The walls of the lungs are filled with capillaries. Capillaries are

The increase of oxygen does not necessarily mean the fish will keep up with it. Too much oxygen can be harmful to the fish so you would need a certain amount per area of fish. A constant flow of oxygen going throughout the water habitat.

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).

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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

Which type of breathing resulted in PCO2 levels closest to the ones we experimented with in this activity – normal

The Purpose of this experiment was to determine the importance of cellular respiration in the processes of Life. The objective of this experiment was to determine the rate of cellular respiration and how the presence of carbohydrates and pollutants will affect it. Our hypothesis was that an organism has larger rate of Cellular Respiration with the source of Carbohydrates as compared to the one that is without the Carbohydrates source and vice versa in

An investigation into the effects of varying seawater concentrations on two marine invertebrates’ osmoregulatory abilities; Carcinus maenas and Arenicola marina.

The CTDEP collected bottom- dwelling fish and invertebrates and compared the quantity of organisms and number of species with the levels of oxygen in the water. Both of these studies confirmed that severe effects occurred whenever levels of oxygen fell below 2.0 mg/l. Large reductions in the numbers and types of aquatic life present were noted. The lab experiments recorded reductions in both growth and increase in death.

This concept is taken from Block 4, Module 6 which is entitled as ‘Assessment of respiratory system’. The respiratory system comprises of different organs used in respiration. Respiration involves inhalation and exchange of oxygen and carbondioxide between living organisms and the environment. The organs of respiration include; the nose, pharynx, larynx, trachea, 2 bronchi, bronchioles, 2 lungs and muscles of breathing (the intercostal muscles and the diaphragm).

Marine fish sustain an ionic equilibrium with seawater to keep their plasma around 350 mOsm/kg. The gills remove excess salts from the body (Evans et al., 2005), a process that indirectly causes water loss driven by the dehydrating effect of salinity. Therefore, water replacement by drinking becomes of absolute importance to sustain ion regulation (Fuentes and Eddy, 1997a). In addition to regulation by endocrine and environmental factors of the amount of water ingested (Fuentes et al., 1996; Fuentes and Eddy, 1997a; Fuentes and Eddy, 1997b; Guerreiro et al., 2004; Guerreiro et al., 2001), the processing of imbibed fluid has major impact in fish ion regulation. Ingested water is first processed in the esophagus where it undergoes selective

Limitation of human contact due to technology has had a negative effect because it makes crimes easier to be committed and technology can mislead people. Not long ago, the "Craigslist Killer" was a criminal who committed homicides by having people buy his merchandise online; eventually, once the buyer showed up, he would kill them. The use of technology to communicate has made it easier to commit crimes like these because you are able to hide until the very moment you meet, and as seen, that moment could end up dangerous, even fatal. Obviously, this does not happen too much anymore due to safety features and "Internet safety rules" that we learned in elementary school, but other crimes are still being done today such as selling an item not