Oxygen is measured in 2's and with less fish there is more 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 = According to a study conducted in a Florida spring by authors Mckinsey & Chapman, "It is likely that the pattern of variation in dissolved oxygen interacts with the respiratory abilities of the fishes to affect the distribution pattern and community composition along the gradient". (Mckinsey, D. & Chapman, L., 1998, pg.
If I change _____________________________________________ then the fish will __________________________________________________________________________. c. If I change _____________________________________________ then the fish will __________________________________________________________________________. Design your experiment: 4. Your control group is the “group” of fish that you are keeping in their “normal” environment. How many fish will you measure initially?
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.
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.
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 organism requires 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; finally, answer the questions below. QUESTIONS 1.
Brine is actually a word used for salt water. In this experiment, you will investigate how salt concentration affects the number of shrimp eggs that hatch and survive. Your results will allow you to determine the salt concentration which allows the most shrimp eggs to hatch. Start this experiment by writing a procedure that you can follow to do the experiment and obtain valid conclusions. How would you design your experiment to determine the best conditions for brine shrimp eggs to hatch and survive?
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.
We test the water quality of the river and compare it to the population and diversity of plankton in the water to determine how healthy the environment in the river is. We are able to use plankton as a “water quality indicator” because plankton absorb the nutrients in the river directly into their bodies. If there is a change in our water the plankton are the first to respond. Now again, why should we care about this? Because if there is an excessive amount
This is called homeostasis. Homeostasis is when the body tries to keep the oxygen level stable. The change the goldfish had to go through is called acclimate which is an organisms change in response to a change in the organisms environment. By doing this lab, I learned what homeostasis is and I learned what the difference is between acclimating and
Human Intervention on Salmon Populations 1 The Effects of Human Intervention on Wild Pacific Salmon Populations Human Intervention on Salmon Populations Abstract Wild Pacific salmon have been studied extensively over the past thirty years, and much has been done to increase or at least maintain populations of varying species. Of these various sustainability tactics, many have proven to be responsible for declining populations. It becomes apparent that policy makers, lawmakers, and industry leaders have either not taken these results from scientific studies seriously or have other priorities. If human intervention on wild Pacific salmon populations does not change soon, this resource may be lost forever. 2 Human Intervention