This is probably a long shot, but over the last 5-10 years I can't help but notice the fact that the number of king salmon and coho salmon continues to decline, while the number of sockeye salmon continue to increase. It makes me wonder if we seem to been missing the obvious. I know there is all this speculation out there as to what is causing the decline of kings and cohos. I have heard everything from climate change, commercial fishing, loss of habitat, introduction of invasive species like pike etc. What if there is some type of competition going on between sockeyes and kings and cohos. I know sockeyes spawn in lakes and kings and cohos spawn in the rivers, so it is probably not spawning habitat. What about a food source? To the best of my knowledge, juvenile kings, cohos, and sockeye all rely heavily on plankton and crustaceans in the ocean. Perhaps something has caused an imbalance between the species which has caused the sockeyes to thrive, while the chinooks and cohos struggle.