Pacific Salmon Life Cycle

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Pacific Salmon Life Cycle - Quiz

Identifying the stages of the salmon life cycle.


Questions and Answers
  • 1. 

    Which choice has the salmon life cycle in the correct order?  (remember a circle has no beginning or end)

    • A.

      Smolt, adult, fry, alevin, egg, spawning adult, parr

    • B.

      Adult, spawning adult, egg, alevin, fry, parr, smolt

    • C.

      Spawning adult, parr, smolt, egg, adult, fry, parr, alevin

    • D.

      Alevin, smolt, parr, adult, spawning adult, fry, egg

    Correct Answer
    B. Adult, spawning adult, egg, alevin, fry, parr, smolt
    Explanation
    The correct answer is the second choice: adult, spawning adult, egg, alevin, fry, parr, smolt. This order represents the complete life cycle of a salmon, starting with the adult salmon and ending with the smolt. The spawning adult lays eggs, which hatch into alevin. The alevin then develops into fry, which grow into parr. Finally, the parr undergoes physiological changes to become a smolt before entering the ocean as an adult salmon.

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  • 2. 

    Which stage is found in freshwater, has large parr marks, and hunts for its food?

    • A.

      Smolt

    • B.

      Parr

    • C.

      Fry

    • D.

      Alevin

    Correct Answer
    B. Parr
    Explanation
    The correct answer is parr. Parr is a stage found in freshwater where the fish have large parr marks on their sides. During this stage, the fish actively hunts for its food. Smolt is a stage where the fish prepares to migrate to the ocean, fry is a stage where the fish has just hatched and is feeding on its yolk sac, and alevin is a stage where the fish has recently hatched and is still attached to its yolk sac.

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  • 3. 

    Which life stage is found in the ocean?

    • A.

      Fry

    • B.

      Alevin

    • C.

      Spawning adult

    • D.

      Adult

    Correct Answer
    D. Adult
    Explanation
    The correct answer is "adult" because adult life stages of various organisms are commonly found in the ocean. This includes adult fish, mammals, and invertebrates such as crustaceans and mollusks. The adult stage is typically the reproductive stage of an organism, and many marine species spend the majority of their lives as adults in the ocean.

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  • 4. 

    Which stage is when the salmon lose their parr marks, turn silver, and move into the ocean?

    • A.

      Fry

    • B.

      Parr

    • C.

      Smolt

    • D.

      Adult

    Correct Answer
    C. Smolt
    Explanation
    The correct answer is smolt. Smolt is the stage when the salmon lose their parr marks, which are dark vertical bars on their sides, and turn silver. At this stage, they also undergo physiological changes that allow them to adapt to the ocean environment. Smolts then migrate from freshwater rivers and streams to the ocean, where they will spend a significant portion of their lives before returning to freshwater to spawn as adults.

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  • 5. 

    Which salmon stage is spelled correctly.

    • A.

      Allevin

    • B.

      Aleven

    • C.

      Alevin

    • D.

      Aleeevin

    Correct Answer
    C. Alevin
    Explanation
    The correct answer is "alevin". Alevin is the correct spelling for the stage of a salmon's life cycle when it has just hatched from an egg and still has a yolk sac attached to its body. The other options provided, "allevin", "aleven", and "aleeevin", are all incorrect spellings and do not represent the proper term for this specific stage of a salmon's life.

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  • 6. 

    Which stage finds the salmon starting to hunt for food, leaves the redd, and no longer has a food sack on its belly?

    • A.

      Adult

    • B.

      Spawning adult

    • C.

      Fry

    • D.

      Smolt

    Correct Answer
    C. Fry
    Explanation
    The fry stage is the correct answer because it is the stage where the salmon starts to hunt for food, leaves the redd (nest), and no longer has a food sack on its belly. This stage represents the transition from the initial hatching stage to a more independent and active feeding stage for the salmon.

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  • 7. 

    What two things change when salmon spawn?

    • A.

      Size and shape

    • B.

      Type of salmon

    • C.

      Shape and color

    Correct Answer
    C. Shape and color
    Explanation
    When salmon spawn, their shape and color change. This is a natural process that occurs as they prepare for reproduction. The shape of the salmon may change as they develop a hump on their back and their jaw may become hooked. Additionally, their color can change as they develop vibrant hues, such as red or pink, to attract mates. These changes help the salmon in their reproductive efforts and are a crucial part of their life cycle.

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  • 8. 

    After salmon ______ they die.

    • A.

      Swim

    • B.

      Move to the ocean

    • C.

      Spawn

    • D.

      Lose their food sack

    Correct Answer
    C. Spawn
    Explanation
    After salmon spawn, they die.

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  • 9. 

    Salmon nests are called:

    • A.

      Redds

    • B.

      Reds

    • C.

      Nests

    • D.

      Gravel

    Correct Answer
    A. Redds
    Explanation
    Salmon nests are called "redds". Redds are created by female salmon when they use their tails to dig depressions in gravel beds in freshwater rivers or streams. These nests serve as a safe place for the female salmon to lay their eggs and for the eggs to develop and hatch. The term "redds" is specific to salmon nests and is commonly used in the field of fisheries and aquatic biology.

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