BIO 1000 Fish pop case All Questions

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St. Francis College *

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1000

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Geography

Date

Oct 30, 2023

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docx

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Uploaded by LieutenantGoldfishPerson273

Fish Population Case ---type your name and section number here: Put your answers in a different color (readable) font. Part 1 Questions 1. What changes have the fishers found when they go to catch their fish? 2. What patterns can you detect from studying Figures 1 and 2? How might this be relevant to the squid and your answer to Question 1? 3. What could be the potential causes of these changes? 4. What evidence would we need to collect to determine whether these potential causes are in fact the source of the changes? What will this evidence show? 5. The fishing industry is considered a “social-economic-ecological system.” a. Why is it considered a social system? b. Why is it considered an economic system? c. Why is it considered an ecological system? d. In what ways do these subsystems interact? 6. What are the potential effects of the shifting fish populations on marine ecosystems and the fishing industry? Create a diagram that models all the potential causes and effects related to this case. In your diagram consider all the components that might be a part of the scenario besides the fishers and the fish. This is an initial diagram where you will have a chance to revise your diagram later in the case as more information becomes available For this diagram, you can actually use a computer program that inserts text boxes, and you can import pictures, OR just draw and label by hand (very neatly), take a picture of the drawing with your phone, e- mail it to yourself, take a screenshot and insert it into this word doc. Fish Populations Part II Questions 1. Identify the trends in temperature over time as represented in Figure 3. 2. In your own words, describe “climate velocity.”

3. Note the data presented in Figure 3. Describe how marine species may respond to shifting temperatures as displayed in the figure. Consider the following questions in your response: a. When species are introduced to a new environment, what positive impacts might they bring to the new habitat? b. When species are introduced to a new environment, what harm might they cause to the new habitat? c. Since black sea bass have been introduced to new habitats, they have been impacting the lobster population. What other consequences can you envision stemming from this new species’ arrival? 4. Ecosystems are complex. Identify the cause-effect relationships that may occur when species shift their locations. Fish Populations Part III Questions 1. How might the interactions of fishing, introduced species, and climate velocity affect the abundance and distribution of marine fish? 2. Fishing regulations place limits on the quantity and size of fish obtained in sectors of the ocean. Why is it so difficult to establish fishery regulations which ensure fish populations are sustainable? 3. Revise the model you created in Part I to account for the complexity of the issue presented in this case study. Be sure to identify positive and negative feedbacks that might add to the complexity of developing a sustainable fisheries management plan. Use Figure 4 as a guide when constructing your model to ensure all the components of the case are considered in your plan. (if this is too daunting---just submit your first diagram). 4. As one of the stakeholders, what is the best management plan from your perspective? Why? Be ready to defend your ideas with evidence-based arguments

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