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Thread: Salmon By the Numbers

  1. #1
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    Default Salmon By the Numbers

    Using King Salmon as an example:

    • Average adult produces 5,000 eggs
    • A run of 1000 fish (assuming equal gender distribution) produces 2.5 million eggs
    • To maintain a steady population, 2 eggs from each female must survive to return as adults
    • 2 out of 5,000 is 0.04%
    • Roughly 10% of the eggs survive to outmigrate, 250,000 smolt


    What's happening to the other 249,000?
    I'd agree with you, but then we'd both be wrong.

  2. #2

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    birds, whales, salmon, fish, etc.. It a tough life. It's amazing that when you catch a king in the ocean, you are catching a true survivor. kinda sucks that they dodge all the nets, hooks, and sea lions only to get snagged in the mouth in the river they spent their whole lives waiting to get back too.

  3. #3
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    Only the lucky ones get snagged in the mouth.....
    I'd agree with you, but then we'd both be wrong.

  4. #4

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    Quote Originally Posted by AKBoater View Post
    Using King Salmon as an example:

    • Average adult produces 5,000 eggs
    • A run of 1000 fish (assuming equal gender distribution) produces 2.5 million eggs
    • To maintain a steady population, 2 eggs from each female must survive to return as adults
    • 2 out of 5,000 is 0.04%
    • Roughly 10% of the eggs survive to outmigrate, 250,000 smolt


    What's happening to the other 249,000?
    An escapement of 1,000 king salmon would likely produce about 45,000 smolt, not 250,000. If marine survival is 3%, then 1,350 smolt would survive to return as adults so that 350 fish would be available for harvest to keep the escapement at 1,000 fish.

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