Dissolved oxygen levels can also cause fish to suffocate and be more susceptible to diseases. Construct a hypothesis – Based on your observation in Question 1 and your background research in Question 2, develop a hypothesis statement that addresses the relationship between dissolved oxygen in the water sample and the number of fish observed in the body of water. Answer = If the dissolved oxygen level is high in a body of water, there will be a low number of fish. The higher the dissolved oxygen level the higher the death rate of the current fish. 3.
Goldfish obtain oxygen from the water, and the process starts with water flowing into the mouth, over the filaments in the gills, which are located on the sides of the head, and out through the operculum, which is a flap located on each gill chamber. The operculum lifts slightly away when it is expelling water out from the gill chamber. The breathing rate of the fish can be determined by counting the number of times that the mouth or operculum opens and closes. An increase of temperature makes the goldfish’s metabolism increase, and so it requires more oxygen to support the increased metabolism. On the contrary, a decrease in water temperature causes a fish not to require as much oxygen.
Effects of copper on survival and growth of larval false clown anemonefish Amphiprion ocellaris. Summary: This article is written by Takeshi Furuta, Nakahiro Iwata, Kotaro Kikuchi and Kenji Namba. The article introduces us about marine finfish species which shows a high mortality at the end of the yolk sac stage, also about the larvae which changes their nutritional source from endogenous to exogenous ones, this stage is called ‘critical phrase’. It is considered to be a lack of several essential nutrients in food, such as fatty acids, vitamins and minerals, which were developed to enhance the survival during the stage. In contrast, minerals might be absorbed not only from diet but also from the ambient water in developed fish.
As the ppm of dissolved oxygen increased so did the amount of fish there were in the water. Clearly, the fish prefer to be in water that has more ppm of dissolved oxygen. 2. Do background research – Utilizing at least one scholarly source, describe how variations in dissolved oxygen content in a body of water can affect fish populations. Answer = Based on research done by Elshout, Pires, Leuven, Bonga, and Hendriks, lower Dissolved Oxygen levels have a major impact on the fish population and reproduction.
Table 4: Water Quality vs. Fish Population Dissolved Oxygen (ppm) 0 2 4 6 8 10 12 14 16 18 Number of Fish Observed 0 1 3 10 12 13 15 10 12 13 What patterns do you observe based on the information in Table 4? The more dissolved oxygen there is in the water, the more fish there are as well. Develop a hypothesis relating to the amount of dissolved oxygen measured in the water sample and the number of fish observed in the body of water. If there is more dissolved oxygen in the water then there will be more fish present in that area.
QUESTIONS 1. Make an observation – Based on the data in Table 4, discuss what patterns you observe in regards to dissolved oxygen content and fish populations in the body of water? Answer = By my observation the pattern goes by minus 1 twice, then minus 2 twice, then plus 3 twice, then minus 4 twice, then minus 5, so the pattern is 1,2,3,4,5, and so on. 2. Do background research – Utilizing at least one scholarly source, describe how the dissolved oxygen content in a body of water can effect fish populations.
Lab 1 – Introduction to Science Exercise 1: The Scientific Method Dissolved oxygen is oxygen that is trapped in a fluid, such as water. Since many living organisms require oxygen to survive, it is a necessary component of water systems such as streams, lakes, and rivers in order to support aquatic life. The dissolved oxygen is measured in units of parts per million (ppm). Examine the data in Table 4 showing the amount of dissolved oxygen present and the number of fish observed in the body of water the sample was taken from and then answer the questions below. QUESTIONS 1.
Fish normally develop bradycardia when they are withdrawn from the water. Introduction Diving response refers to a psychological response in human and animals that allow them to survive when submerged in water or are drowning. It leads to blood being redistributed to vital organs such as the brain and heart hence ensuring a constant supply of oxygen. This leads to longer periods of suspended breathing (apneia) without risking asphyxiation (Robertson, Biaggioni, Burnstock, Low and Julian, 2007, p. 569). Diving response is achieved through constriction of blood vessels and reduction of blood supply to oxygen tolerant tissues with the heart rate
In a fish, the metabolic rate depends on the temperature of the water. The metabolic rate can be calculated by measuring the amount of oxygen initially and then measuring the amount of oxygen again later. Temperature of the water, activity of the fish and size of the fish affects the metabolic rate of the fish. In this experiment, we will study the effect of temperature on two variables, oxygen consumption and ventilation rate of the fish by determining the rates of both in two different temperatures 15C and 25C which are the independent variables. Oxygen Consumption and the ventilation rate of the fish are directly proportional to the temperature of the water.
Holly Racheter 14 October 2014 Agonistic Behavior Displayed in Crayfish (Orconectes rusticus) of The Same Sex. Question When testing for agonistic behavior in same-sex (male) crayfish, will the larger one establish dominance over the other? Null Hypothesis When testing for agonistic behavior in male vs. male crayfish, the larger one will not establish dominance over the other. Alternate Hypothesis When testing for agonistic behavior in male vs. male crayfish, the lager one will establish dominance over the other. Prediction In this experiment, when allowing two crayfish to display agonistic behavior, it is predicted that the larger and stronger of the two crayfish will be the one to establish dominance.