What conditions will you simulate?
How does each condition help a population survive?
What is the population shown in the video? What ecosystem are they a part of?
Explain what limiting resources are. What effects would these have on populations?
What would happen to a population if there are no limiting factors present? Why?
What is the difference between interspecific competition and intraspecific competition?
The Fishery Simulation
During the fishery simulation limiting factors such as food, predators, pollution, and disease will be manipulated in order to test what makes the tuna population increase, decrease, or stay constant.
STEP 1
Generate a question for your investigation:
STEP 2
Hypothesis
What is the Independent Variable in this experiment?
___________________
Create a hypothesis for your investigation. Use the format below:
IF_______________________________________________,
THEN____________________________________________
________________________________________________.
What is the Dependent Variable in this experiment?
___________________
Simulation Directions:
Follow the tutorial in the simulation to familiarize yourself with how the simulation works. Read each screen carefully and be sure you understand each part of the tutorial before moving to Stage 1 of the simulation.
STEP 3
Experiment
Click here to access The Fishery Simulation
What are the control variables in this experiment?
Materials List:
Procedures (list steps)
1.
6.
2.
7.
3.
8.
4.
9.
5.
10.
Stage 1 Directions:
In this stage you will examine how birth rate, death rate, and migration rate affect the sustainability of the Avril Gulf tuna population.
Click on the “Show Normal Population Growth” box to see the graph of what happens to this population if reproduction, migration, and death rates are moderate
Collect Data
Explore what happens to the population as you change the three variables. Only change one variable at a time, other variables should be kept in the middle. Record observations of what happens to the sustainability of the population in the table below. Some have already been filled out for you
Variable
Observation of population at Low
Observation of population at Population at High
Reproduction
no change, remains at 20,000
Migration
Deaths
slower growth but reaches 100,000
Use the simulation to determine what settings for the three variables maintain the population at 60,000 fish. Record the graph you see and the settings used below. Make sure you include the dotted line and dashed line. The dashed line represents normal population growth while the dotted line represents population growth at the settings you set.
Predict what settings would maintain the population at 80,000 fish. Write down your predictions below, and then use the simulation to test your prediction. If necessary, change the settings as you run the simulation. Record the graph you see and the settings used below
Questions:
What are the 2 limiting factors present in this stage?
Stage Two Directions:
In this stage you will examine how predators, amount of food, and incidents of disease and pollution affect the sustainability of the Avril Gulf tuna population. Note that in Stage 2 you cannot control pollution or disease events, which will occur at random intervals
Collect Data
Explore what happens to the population as you change the two variables. Only change one variable at a time, other variables should be kept in the middle. Record observations of what happens below
What happens when the predators is lowered to none?
What happens when it is increased to many?
What happens when food is lowered to little?
What happens when it is increased to abundant?
Use the simulation to determine what settings for the three variables maintain the population at 60,000 fish. Record the graph you see and the settings used below. Make sure you include the dotted line and dashed line. The dashed line represents normal population growth while the dotted line represents population growth at the settings you set.
Predict what settings would maintain the population at 80,000 fish. Write down your predictions below, and then use the simulation to test your prediction. If necessary, change the settings as you run the simulation. Record the graph you see and the settings used below
Questions
What happened immediately when pollution occurred?How long did it take the population to recover after pollution occurred?
What happened immediately after disease occurred? How long did it take the population to recover after disease occurred?
Stage Three Directions:
In this stage you will examine how fishing intensity and length of fishing season affect the sustainability of the Avril Gulf tuna population.
Collect Data
Explore what happens to the population as you change the amount of fishing at different times of the year. Only change one variable at a time, other variables should be kept in the middle. Record observations of what happens below
What happens when there is heavy fishing at different times of year?
summer
fall
winter
spring
What happens when there is no fishing at different times of year?
summer
fall
winter
spring
B. Use the simulation to determine what settings for the three variables maintain the population at 60,000 fish. Record the graph you see and the settings used below. Make sure you include the dotted line and dashed line. The dashed line represents normal population growth while the dotted line represents population growth at the settings you set.
C. Predict what settings would maintain the population at 80,000 fish. Write down your predictions below, and then use the simulation to test your prediction. If necessary, change the settings as you run the simulation. Record the graph you see and the settings used below
Questions
Some fishing will occur, as humans interact with the environment. Find a pattern that will allow the tuna population to remain at a carrying capacity of 60,000. What fishing regulations would maintain this population size?
Stage Four Directions:
In this stage all of the variables can be manipulated to determine their collective
effect on the sustainability of the Avril Gulf tuna population.
Collect Data
Explore what happens to the population as you change the amount of fishing at different times of the year. Only change one variable at a time, other variables should be kept in the middle. Record observations of what happens below
What happens when:
food is abundant and there are no predators?
reproduction is low and death is high?
there is heavy fishing in spring and summer?
B. Use the simulation to determine what settings for the variables maintain the population at 60,000 fish. Record the graph you see and the settings used below. Make sure you include the dotted line and dashed line. The dashed line represents normal population growth while the dotted line represents population growth at the settings you set.
C. Use the simulation to determine what settings for the variables maintain the population at 60,000 fish. This time, incorporate the maximum amount of fishing possible. Record the graph you see and the settings used below. Make sure you include the dotted line and dashed line. The dashed line represents normal population growth while the dotted line represents population growth at the settings you set.
Questions
What factors allowed for the maximum amount of fishing while maintaining the fish population? Record the greatest amount of fishing allowable.
Which factors are density-dependent and which are density-independent?
How could a model, such as this simulation, help fisheries biologists make recommendations about setting fishing limits to ensure the survival of a population and cause minimal negative impacts to the ecosystem? Explain your answer. (3-5 sentences)
Summarize your lab report by answering the following questions.
5. Conclusion: written explanation of what you learned. This should be one paragraph explaining what you learned about populations and ecosystems (5-6 sentences, 250 words). Be sure to include ALL required vocab words from the list above and underline them.
Information to include:
Did your data support or refute your hypothesis?
What would you do to improve the experiment in the future?
What did you learn about this topic?sngstgntwtnyn
The conditions that will be simulated in this experiment include birth rate, death rate, migration rate, predators, food availability, pollution, disease, and fishing intensity. Each of these factors can impact the population of tuna in the Avril Gulf.
For example, manipulating the birth rate, death rate, and migration rate can help determine the sustainability of the tuna population. By adjusting these variables, we can observe how the population increases, decreases, or remains constant. Similarly, factors such as predators, food availability, pollution, disease, and fishing intensity can have a direct impact on the population size. By investigating these variables, we can understand how they influence the population dynamics of the tuna population.
The population shown in the video is tuna, and they are a part of the marine ecosystem in the Avril Gulf. Limiting resources are resources that are scarce or in limited supply, such as food, space, and shelter. These factors can limit the growth of a population and influence its survival.
If there are no limiting factors present, a population would likely experience exponential growth until it reaches the carrying capacity of its environment. This can lead to overpopulation, resource depletion, and competition for resources, ultimately resulting in a crash in the population size.
Interspecific competition is competition between different species for shared resources, while intraspecific competition is competition between individuals of the same species for resources. Both types of competition can impact population dynamics and influence the survival of a population.
In conclusion, this experiment utilizes a fishery simulation to investigate how various factors such as birth rate, death rate, migration rate, predators, food availability, pollution, disease, and fishing intensity affect the sustainability of the tuna population in the Avril Gulf. By manipulating these variables and analyzing their effects, we can gain valuable insights into population dynamics and ecosystem health.
fill this out
The Fishery Simulation
During the fishery simulation limiting factors such as food, predators, pollution, and disease will be manipulated in order to test what makes the tuna population increase, decrease, or stay constant.
STEP 1
Generate a question for your investigation:
STEP 2
Hypothesis
What is the Independent Variable in this experiment?
___________________
Create a hypothesis for your investigation. Use the format below:
IF_______________________________________________,
THEN____________________________________________
________________________________________________.
What is the Dependent Variable in this experiment?
___________________
Simulation Directions:
Follow the tutorial in the simulation to familiarize yourself with how the simulation works. Read each screen carefully and be sure you understand each part of the tutorial before moving to Stage 1 of the simulation.
STEP 3
Experiment
Click here to access The Fishery Simulation
What are the control variables in this experiment?
Materials List:
Procedures (list steps)
1.
6.
2.
7.
3.
8.
4.
9.
5.
10.
Stage 1 Directions:
Step 1: Generate a question for your investigation:
How do food availability, predators, pollution, and disease impact the sustainability of the tuna population in the Avril Gulf?
Step 2:
What is the Independent Variable in this experiment?
- The independent variables in this experiment are food availability, predators, pollution, and disease.
Hypothesis:
IF the food availability is increased, the tuna population will increase.
THEN if the predators are reduced, pollution is minimized, and disease incidents are controlled, the tuna population will thrive.
What is the Dependent Variable in this experiment?
- The dependent variable in this experiment is the tuna population size.
Control Variables:
The control variables in this experiment include the initial population size of tuna, the environmental conditions in the Avril Gulf, and the baseline levels of food availability, predators, pollution, and disease.
Materials List:
- Computer with internet access
- The Fishery Simulation software
Procedures:
1. Access The Fishery Simulation software.
2. Familiarize yourself with the simulation by following the tutorial.
3. Understand each part of the tutorial thoroughly.
4. Proceed to Stage 1 of the simulation.
5. Follow the directions provided in the simulation to manipulate the variables and observe the effects on the tuna population.
6. Record data and observations as instructed in the simulation.
7. Analyze the results and draw conclusions based on the data collected.
8. Generate a report summarizing the findings of the experiment.
9. Reflect on the implications of the results on tuna population sustainability.
10. Consider potential real-world applications and conservation strategies based on the experiment's outcomes.
Stage 1 Directions:
In this stage you will examine how birth rate, death rate, and migration rate affect the sustainability of the Avril Gulf tuna population.
Click on the “Show Normal Population Growth” box to see the graph of what happens to this population if reproduction, migration, and death rates are moderate
Collect Data
Explore what happens to the population as you change the three variables. Only change one variable at a time, other variables should be kept in the middle. Record observations of what happens to the sustainability of the population in the table below. Some have already been filled out for you
Variable
Observation of population at Low
Observation of population at Population at High
Reproduction
no change, remains at 20,000
Migration
Deaths
slower growth but reaches 100,000
Use the simulation to determine what settings for the three variables maintain the population at 60,000 fish. Record the graph you see and the settings used below. Make sure you include the dotted line and dashed line. The dashed line represents normal population growth while the dotted line represents population growth at the settings you set.
Predict what settings would maintain the population at 80,000 fish. Write down your predictions below, and then use the simulation to test your prediction. If necessary, change the settings as you run the simulation. Record the graph you see and the settings used below
Questions:
What are the 2 limiting factors present in this stage?
Stage Two Directions:
In this stage you will examine how predators, amount of food, and incidents of disease and pollution affect the sustainability of the Avril Gulf tuna population. Note that in Stage 2 you cannot control pollution or disease events, which will occur at random intervals
Collect Data
Explore what happens to the population as you change the two variables. Only change one variable at a time, other variables should be kept in the middle. Record observations of what happens below
What happens when the predators is lowered to none?
What happens when it is increased to many?
What happens when food is lowered to little?
What happens when it is increased to abundant?
Use the simulation to determine what settings for the three variables maintain the population at 60,000 fish. Record the graph you see and the settings used below. Make sure you include the dotted line and dashed line. The dashed line represents normal population growth while the dotted line represents population growth at the settings you set.
Predict what settings would maintain the population at 80,000 fish. Write down your predictions below, and then use the simulation to test your prediction. If necessary, change the settings as you run the simulation. Record the graph you see and the settings used below
Questions
What happened immediately when pollution occurred?How long did it take the population to recover after pollution occurred?
What happened immediately after disease occurred? How long did it take the population to recover after disease occurred?
Stage Three Directions:
In this stage you will examine how fishing intensity and length of fishing season affect the sustainability of the Avril Gulf tuna population.
Collect Data
Explore what happens to the population as you change the amount of fishing at different times of the year. Only change one variable at a time, other variables should be kept in the middle. Record observations of what happens below
What happens when there is heavy fishing at different times of year?
summer
fall
winter
spring
What happens when there is no fishing at different times of year?
summer
fall
winter
spring
B. Use the simulation to determine what settings for the three variables maintain the population at 60,000 fish. Record the graph you see and the settings used below. Make sure you include the dotted line and dashed line. The dashed line represents normal population growth while the dotted line represents population growth at the settings you set.
C. Predict what settings would maintain the population at 80,000 fish. Write down your predictions below, and then use the simulation to test your prediction. If necessary, change the settings as you run the simulation. Record the graph you see and the settings used below
Questions
Some fishing will occur, as humans interact with the environment. Find a pattern that will allow the tuna population to remain at a carrying capacity of 60,000. What fishing regulations would maintain this population size?
Stage Four Directions:
In this stage all of the variables can be manipulated to determine their collective
effect on the sustainability of the Avril Gulf tuna population.
Collect Data
Explore what happens to the population as you change the amount of fishing at different times of the year. Only change one variable at a time, other variables should be kept in the middle. Record observations of what happens below
What happens when:
food is abundant and there are no predators?
reproduction is low and death is high?
there is heavy fishing in spring and summer?
B. Use the simulation to determine what settings for the variables maintain the population at 60,000 fish. Record the graph you see and the settings used below. Make sure you include the dotted line and dashed line. The dashed line represents normal population growth while the dotted line represents population growth at the settings you set.
C. Use the simulation to determine what settings for the variables maintain the population at 60,000 fish. This time, incorporate the maximum amount of fishing possible. Record the graph you see and the settings used below. Make sure you include the dotted line and dashed line. The dashed line represents normal population growth while the dotted line represents population growth at the settings you set.
Stage 1 Directions:
- The two limiting factors in this stage are the reproduction rate and the death rate.
- When the reproduction rate is low, the population remains at 20,000 fish.
- When the migration rate is high, the population reaches 100,000 fish.
Stage 2 Directions:
- When predators are lowered to none, the tuna population increases rapidly.
- When predators are increased to many, the tuna population decreases significantly.
- When food is lowered to little, the tuna population decreases.
- When food is increased to abundant, the tuna population increases.
- The population takes some time to recover after pollution occurs.
- The population also takes time to recover after disease occurs.
Stage 3 Directions:
- When heavy fishing occurs in different seasons, it leads to a decrease in the tuna population.
- When there is no fishing, the tuna population remains stable.
- Fishing regulations that limit the amount of fishing in each season can help maintain the tuna population at a carrying capacity of 60,000.
Stage 4 Directions:
- When food is abundant and there are no predators, the tuna population thrives.
- When reproduction is low and death is high, the tuna population decreases.
- Heavy fishing in spring and summer leads to a decrease in the tuna population.
- Fishing regulations that balance reproduction rates, death rates, predator presence, and food availability can help maintain the tuna population at 60,000 fish. Incorporating the maximum amount of fishing possible while managing other variables allows for sustained population growth.