Question 1: Upstream System would be best suited for the movement of large quantities of adult Salmon.
Question 2: Downstream pipe system which uses screens and flowing water to move the salmon is more efficient for moving large quantities of young salmon downstream.
Comparison of Salmon Migration Systems Dams provide electricity, flood control, recreation and transportation as well as water for domestic and agricultural use. However, dams also change the way rivers function, and may interfere with the life cycles of salmon, steelhead, and other animals. They are barriers to juvenile salmon migrating to the ocean, and an obstacle as adult fish return to their natal streams to spawn. Dams affect the way water moves down a river, by changing the amount and timing of flow, as well as its temperature and chemical characteristics. And because dams transform the upstream habitat from a river into a lake, they change the amount and location of available habitat and significantly alter the salmon’s interaction with predators and competitors. For salmon to thrive, it is important to provide safe, swift passage past dams for juveniles traveling to the ocean and for adults migrating back to their spawning grounds. There are many types of passage infrastructure in use at and around dams, depending on factors such a dam’s age, size, location and purpose. Sometimes passage facilities are added many years after a dam is built. These are the most common types of fish passage. Passage adapted from: “Dams on the West Coast.” NOAA Fisheries, 27 June 2023, www.fisheries.noaa.gov/west-coast/endangered-species-conservation/dams-west-coast. Question 1 10. Which system would be best suited for the movement large quantities of adult Salmon?(1 point) Responses Downstream System Downstream System Salmon Canon Salmon Canon Upstream System Upstream System Question 2 11. During downstream migration, some rivers can have thousands of young salmon making the trip to the ocean. Which method of moving the salmon is more efficient of moving large quantities of young salmon downstream?(1 point) Responses The salmon cannon which needs to be loaded by hand The salmon cannon which needs to be loaded by hand Upstream fish ladder in which the adult fish swim/jump up each step to bypass a dam Upstream fish ladder in which the adult fish swim/jump up each step to bypass a dam Downstream pipe system which uses screens and flowing water to move the salmon Downstream pipe system which uses screens and flowing water to move the salmon Skip to navigation
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