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Life Cycle of a Salmon

Life Cycle of a Salmon. By: Mrs. F. Purpose:. Students will identify and describe the stages of the salmon life cycle: egg alevin fry smolt adult spawner Students will describe the stages of the salmon life cycle from what they observe in the salmon tank. . Egg Stage .

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Life Cycle of a Salmon

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  1. Life Cycle of a Salmon By: Mrs. F.

  2. Purpose: • Students will identify and describe the stages of the salmon life cycle: • egg • alevin • fry • smolt • adult • spawner • Students will describe the stages of the salmon life cycle from what they observe in the salmon tank.

  3. Egg Stage Need clean, cool, clear water Dark, quiet places A redd created (or dug) by female salmon

  4. Alevin (or Sac Fry) Look at the heart! • Yolk sac attached to the body provides food for the alevin • Yolk sac will gradually be used up • “Button-up” and emerge from the gravel

  5. Fry • Have dark stripes or spots on their side called parr marks • Provides camoflauge so they will not be eaten • Stay together in groups • Eat tiny plants and animals

  6. Smolt • Between 6 and 10 inches long • Spend several weeks in the estuary getting used to the salt water • Growing fast by eating shrimp, fish and plankton

  7. Adult Salmon • Range in size from 18 to 48 inches long • Spend 3-5 years in the ocean • Ocean salmon are bright silver • Have several predators in the ocean

  8. Spawners • Adult salmon instinctively know when to migrate back to the stream where they hatched • They stop eating and live off fat stores in their bodies • They are cargo vessels for the eggs

  9. Dead Salmon • Most spawners die within a few weeks of spawning • Dead salmon provide nutrients for the stream

  10. References Pictures and Information provided by: • Benton Conservation District (2008). The Life Cycle of Salmon. Salmon in the Classroom GLAD Unit.

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