Ventilation and Oxygen Consumption in Fish
Bio 102- PR# 2
Goldfish (Carassius Autarus), when subjected to warm temperatures will have a high rate of ventilation compared to those exposed in colder environment. In a class experiment, we observed and recorded the effects of water temperature at [25 C] warm and [15 C] cold on ventilation and consumption rates in goldfish. For one hour at 15min intervals we observed differences in both ventilation and consumption rates in which, in warmer temperature were higher, while in colder setting there was a decreased. These findings suggest that temperature plays a major role on both oxygen consumption and ventilation rates in this species of fish. Temperature is one of many factors known to affect metabolic rates.
The survival of most animals requires a process in which oxygen is acquired and carbon dioxide is eliminated from the body. Oxygen is essential for the production of ATP from nutrients in cells and therefore must be delivered to cells in sufficient amounts. Diffusion takes place when air or water is drawn in from the environment by animals spreading from a region of high concentration to a region of low concentration. However, in larger sized animals diffusion is not very efficient, so most animals have developed respiratory organs that can be utilized for ventilation purposes. Ventilation is the process in which air or water containing oxygen can be drawn on. An attachment to the respiratory organs called the circulatory system, delivers oxygen and other nutrients throughout the entire body. Since the space between the respiratory surface and circulatory system are in such close proximity, diffusion is sufficient in providing the necessary amounts of oxygen needed. (Model, J., C. Hood, E. Kuck and B. Ruiz, 1971)
In the class experiment we used a goldfish, an animal that lives in water and has only limited amount of oxygen which has dissolved in water....
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