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I don't understand why they don't introduce more generic diversity and why they don't have things like water keys in the water. It doesn't like it's too difficu

I don't understand why they don't introduce more generic diversity and why they don't have things like water keys in the water. It doesn't like it's too difficult to have assumed this would be the outcome. It's like having somebody that has stayed indoors watching tv until they were 10 to complete against a kid that has been outside running around and playing in the streets.

derefr 7y ago
Salmon don’t climb water jumps just because they feel like it, like hamsters using wheels. They migrate; and sometimes rivers are how they migrate. To raise “buff” salmon, you’d need something that looks less like a fishery, and more like a private river with the upstream pointed in the right direction for their migratory instincts. And, since they wouldn’t want to turn around at the end, you’d need to pick them all up and haul them back to the beginning so that they would swim it again.
- kingbirdy 7y ago
  Would it not be possible to create a closed loop for them to endlessly swim up? Sort of like a lazy river at a water park, but with a stronger current.
  - hanniabu 7y ago
    You certainly could create circular containments with directional flow.
  - derefr 7y ago
    I’m not sure how salmon specifically would react, but migratory animals generally don’t get fooled by these sorts of things. (I don’t think anyone knows the mechanism, as not all migratory species have internal compasses like migratory birds do. But they do it anyway. Maybe it’s just really good dead reckoning?)
  - wavefunction 7y ago
    Salmon spawn in a river and head out to sea for a while to mature before returning to their river and reproducing and dieing. So... probably not and what purpose would that serve?
kaikai 7y ago
I used to work at a hatchery raising steelhead and coho salmon. The number of adults we could take from the river for spawning were limited both by how many we could find and by the department of fish and game. Importing genetics from other rivers would introduce those genes into the wild fish population, and should really be avoided. Most fish return to their home stream, and are specially adapted to those conditions. “Adding more genetic diversity” is something everyone wants but is not necessarily easy.
- hanniabu 7y ago
  So people are allowed to fish and kill a lot of them and you guys are more limited on fire many you can fish to reproduce? Wow, I never cease to be surprised by how stupid government can be.
  - taxidump 7y ago
    >So people are allowed to fish and kill a lot of them and you guys are more limited on fire many you can fish to reproduce? Wow, I never cease to be surprised by how stupid government can be. Can you rephrase this in the form of a sentence?
    - pvaldes 7y ago
      Fishermen are allowed to kill the best genetically gifted specimens just before they are about to reproduce; thus talking about low genetic diversity is just an excuse. If you really want to increase genetic diversity there is a really cheap and simple solution. Reduce recreational fishing.
      - NotSammyHagar 7y ago
        They determine dynamically each year and for each fish species if there are enough of them to allow for fishing in the rivers and streams the fish migrate through.
        7y ago

derefr 7y ago

Salmon don’t climb water jumps just because they feel like it, like hamsters using wheels. They migrate; and sometimes rivers are how they migrate. To raise “buff” salmon, you’d need something that looks less like a fishery, and more like a private river with the upstream pointed in the right direction for their migratory instincts. And, since they wouldn’t want to turn around at the end, you’d need to pick them all up and haul them back to the beginning so that they would swim it again.

kingbirdy 7y ago
Would it not be possible to create a closed loop for them to endlessly swim up? Sort of like a lazy river at a water park, but with a stronger current.
- hanniabu 7y ago
  You certainly could create circular containments with directional flow.
- derefr 7y ago
  I’m not sure how salmon specifically would react, but migratory animals generally don’t get fooled by these sorts of things. (I don’t think anyone knows the mechanism, as not all migratory species have internal compasses like migratory birds do. But they do it anyway. Maybe it’s just really good dead reckoning?)
- wavefunction 7y ago
  Salmon spawn in a river and head out to sea for a while to mature before returning to their river and reproducing and dieing. So... probably not and what purpose would that serve?

kaikai 7y ago

I used to work at a hatchery raising steelhead and coho salmon. The number of adults we could take from the river for spawning were limited both by how many we could find and by the department of fish and game. Importing genetics from other rivers would introduce those genes into the wild fish population, and should really be avoided. Most fish return to their home stream, and are specially adapted to those conditions. “Adding more genetic diversity” is something everyone wants but is not necessarily easy.

hanniabu 7y ago
So people are allowed to fish and kill a lot of them and you guys are more limited on fire many you can fish to reproduce? Wow, I never cease to be surprised by how stupid government can be.
- taxidump 7y ago
  >So people are allowed to fish and kill a lot of them and you guys are more limited on fire many you can fish to reproduce? Wow, I never cease to be surprised by how stupid government can be. Can you rephrase this in the form of a sentence?
  - pvaldes 7y ago
    Fishermen are allowed to kill the best genetically gifted specimens just before they are about to reproduce; thus talking about low genetic diversity is just an excuse. If you really want to increase genetic diversity there is a really cheap and simple solution. Reduce recreational fishing.
    - NotSammyHagar 7y ago
      They determine dynamically each year and for each fish species if there are enough of them to allow for fishing in the rivers and streams the fish migrate through.
      - 7y ago