South American Chinook Salmon

[SpringVelocity]

https://news.nationalgeographic.com/news/2007/12/071228-alien-salmon_2.html

Have a read. Genetically larger salmon than ours 40-60lb range. Ex-Columbia origin fish. You have to wonder how? With all our troubles this region along Argentina and Chile have the opposite problem. The salmon are expanding so fast they are threatening other native populations.

 

[littlechucky]

My guess is lack of predators.

Presumably the older age class fish win at the spawning game and over time you end up with a larger overall population.

Basically the inverse of what is happening here as the older fish have a much lower chance of survival due to predatory threats (humans included).

 

[Dave]

There you go, fish farms are good for chinook salmon

 

[fogged in]

There you go, fish farms are good for chinook salmon

nice try Dave
this old National Geographic story said....
Chile's Escaping Fish
Staniford, of the Pure Salmon Campaign, said salmon escapes from Chilean farms are spiraling out of control.
Millions of fish reportedly escaped in a single incident last year, when an earthquake triggered a mini-tsunami that hit salmon farms in Chile's Aysen region, Staniford noted.
In addition to competing with penguins and sea mammals for prey, escapees can spread disease and parasitic sea lice that affect wild fish, Staniford added.

 

[california]

In the future you may have to go to Patagonia to catch any Chinook, esp wild ones. They have colonized rivers in both the pacific and Atlantic oceans, mostly decendants of Columbia river fish that were the subject of a ranching attempt in two rivers in the 70s, and then some influence from farm escapees in the 90s.

http://globalflyfisher.com/fish-better/patagonian-salmonids

 

[Dave]

So Don Staniford found a rock to hide under in SA ... good riddance.

 

[agentaqua]

Too bad the industry in SA doesn't have Marty - he could write them up a briefing note that Chinook have always been there - issue solved!

 

[wildmanyeah]

https://video.nationalgeographic.com/video/whale_killer_hunts_sealion

Fishermen ****