I don't have much time to participate in threads anymore so I'm just going to C&P what I wrote on FB.
As expected, there have been lots of comments since yesterday's announcement on the salmon fishing closure for a section of the Vedder River by Fisheries and Oceans Canada. There is also plenty of misinformation being passed around so here is a post to clarify everything.
This isn't really a conservation issue. The summer red chinook salmon run in the Chilliwack River is an introduced stock maintained by the hatchery. Like other hatchery stocks (fall white chinook salmon, coho salmon), the abundance is quite high and there have been surpluses at the hatchery after brood target is met. The remaining fish do not spawn naturally. See video attached.
Chilliwack River has two stocks of sockeye salmon which recruit naturally in the wild. The Chilliwack Lake stock's run timing overlaps with the summer red chinook salmon. The Cultus Lake stock usually emerges in September.
The salmon closure for the section from 200m upstream to 200m downstream of the Vedder Crossing Bridge until the end of September is introduced due to poor angling practices in a heavily fished area.
There is no sockeye salmon fishing, meaning that anglers cannot intentionally catch and release them. These regulations are in place to ensure the sustainability of the two wild sockeye salmon runs. The Chilliwack Lake stock does reasonably well, while the Cultus Lake stock is critically endangered.
Due to higher water temperature throughout the summer, these fish (or any salmonid really), do not survive well when being caught and released, especially if they are handled poorly. If fish are being held in the shallow water prior to being released, they are not getting enough oxygen to recover due to the lower dissolved oxygen level in the warmer, shallower water. If you accidentally hook a sockeye salmon, release it quickly and avoid touching it too much.
Anglers should also practice selective fishing. Avoid drifting your hook right along the bottom where you are more likely to foul hook fish indiscriminately. By adjusting your float depth so your presentation suspends above salmon (1 or 2 feet off the river bed), you would almost eliminate the chance of foul hooking fish.
This closure does not solve these problems unfortunately, more likely than not it'd just shift the problems elsewhere. The angling community needs to do better if we want to maintain these fishing opportunities. Educate new anglers who may not be aware of their wrong doings, and enforcement needs to punish those who do not adjust their behaviours and ruin it for everyone else.
With low and warmer river conditions, we should be conscious about our actions and how they may impact the resources. Enjoy the fishing, but don't abuse it. Catch your one chinook salmon and voluntarily stop fishing instead of catching and releasing more fish, so other anglers have a chance to enjoy the same and less fish are impacted by C&R mortality.