Life Cycle and Water Quality Notes

schmied©2015 Life Cycle and Water Quality Notes Purpose: I understand the life cycle of the Pacific salmon & know how humans can impact the health of salmon populations. Use your notes (and or the internet) from the life cycle of the Pacific Salmon to answer the following questions in complete, quality and correct sentences Life Cycle of the Salmon Notes 1. Describe the measurement that is used to predict the stage of development of Pacific Salmon and tell how these are calculated. 2. Explain how the female salmon creates a redd. 3. Tell about how deep and long salmon redds are. (give a range of depths -­‐ lengths) 4. Explain 2 things that can harm salmon eggs while the eggs are incubating in the redd. 5. Tell what young salmon are called after the eggs hatch in the gravel. 6. Describe two hazards smolts encounter while migrating to the Pacific Ocean. 7. Tell one hazard and one predator of adult salmon in the open Ocean. 8. Describe one human made hazard to returning salmon and tell what efforts have been made to fix this problem. schmied©2015 Life Cycle and Water Quality Notes 9. Once salmon finish mating their life cycle ends and the salmon die. Tell two ways the dead salmon are useful in the riparian (streamside) environment. 10. Specifically describe what caused the Columbia River “June Hog” salmon run to go extinct AND tell why this structure was created. Water Quality Notes 1. Explain what the Maximum and Minimum temperatures range is, in ˚C , for Pacific Salmon. 2. Describe the maximum and minimum pH for Pacific Salmon. 3. Tell what other water quality indicator dissolved Oxygen depends on. 4. Describe the minimum amount, in ppm, of dissolved oxygen (DO) needed for natural activity in Pacific salmon. 5. Tell the highest level of turbidity salmon can feed in, in JTU, AND the best turbidity levels for feeding.