Dead salmon in Canada

[glazbagun]

I don't generally sympathise much with fish, but that's a bad way to go out when you've just swam the Atlantic. :

Do salmon spawn annually or is there a gap of a few years?

https://www.bbc.co.uk/news/av/world-us-canada-6313...

[Bonefish Blues]

Those Pacific salmon are 1-shot spawners, usually returning after 1-2 winters at sea, hence their uniform size. After spawning they die - but these didn't make it to spawn, sadly, their migratory urge obviously having triggered by a day of rain whilst they were waiting offshore.

Our salmon (Atlantic salmon) do have the ability to return to the sea after spawning (although not many do) and come again another year (see what I did there...), and are more variable in size when they return, from grilse (1-2 sea winters, 3 to 7-8ish lbs) who typically return in the summer to fish which can be much, much larger, either because they've spawned before and returned, or because they CBA to come back as a smaller fish, so return in Spring or Autumn, typically.

[Turn7]

Jeez, thats pretty catastrophic. Thats going to hurt population numbers going forward massively.

[LimaDelta]

The bears will be loving that.

[Bonefish Blues]

Turn7 said:

Jeez, thats pretty catastrophic. Thats going to hurt population numbers going forward massively.

Less than you might think, providing the river system is in good shape. Nature fills the gap remarkably quickly - these fish massively over-spawn (as in, fish spawn on top of other fish and so on, so only a tiny fraction of eggs reach maturity), so whilst there will be a hit for a few years, numbers will recover.

The Atlantic salmon's the one that deserves our urgent attention, sadly

[Turn7]

Bonefish Blues said:

Turn7 said:

Jeez, thats pretty catastrophic. Thats going to hurt population numbers going forward massively.

Less than you might think, providing the river system is in good shape. Nature fills the gap remarkably quickly - these fish massively over-spawn (as in, fish spawn on top of other fish and so on, so only a tiny fraction of eggs reach maturity), so whilst there will be a hit for a few years, numbers will recover.

The Atlantic salmon's the one that deserves our urgent attention, sadly

I guess, but that stream/river is going to having a colossal Ammonia spike right now, and thats fatal for a lot of waterlife.

[Bonefish Blues]

Turn7 said:

Bonefish Blues said:

Turn7 said:

Jeez, thats pretty catastrophic. Thats going to hurt population numbers going forward massively.

Less than you might think, providing the river system is in good shape. Nature fills the gap remarkably quickly - these fish massively over-spawn (as in, fish spawn on top of other fish and so on, so only a tiny fraction of eggs reach maturity), so whilst there will be a hit for a few years, numbers will recover.

The Atlantic salmon's the one that deserves our urgent attention, sadly

I guess, but that stream/river is going to having a colossal Ammonia spike right now, and thats fatal for a lot of waterlife.

It will be for sure, but then it'll rain, it'll flush through and it will be hugely nutrient-rich for next year.

[Turn7]

Bonefish Blues said:

Turn7 said:

Bonefish Blues said:

Turn7 said:

Jeez, thats pretty catastrophic. Thats going to hurt population numbers going forward massively.

Less than you might think, providing the river system is in good shape. Nature fills the gap remarkably quickly - these fish massively over-spawn (as in, fish spawn on top of other fish and so on, so only a tiny fraction of eggs reach maturity), so whilst there will be a hit for a few years, numbers will recover.

The Atlantic salmon's the one that deserves our urgent attention, sadly

I guess, but that stream/river is going to having a colossal Ammonia spike right now, and thats fatal for a lot of waterlife.

It will be for sure, but then it'll rain it'll flush through and it will be hugely nutrient-rich for next year.

...and thats kind of the issue......"IF" it rains in the usual quantity.

[Bonefish Blues]

Turn7 said:

Bonefish Blues said:

Turn7 said:

Bonefish Blues said:

Turn7 said:

Jeez, thats pretty catastrophic. Thats going to hurt population numbers going forward massively.

Less than you might think, providing the river system is in good shape. Nature fills the gap remarkably quickly - these fish massively over-spawn (as in, fish spawn on top of other fish and so on, so only a tiny fraction of eggs reach maturity), so whilst there will be a hit for a few years, numbers will recover.

The Atlantic salmon's the one that deserves our urgent attention, sadly

I guess, but that stream/river is going to having a colossal Ammonia spike right now, and thats fatal for a lot of waterlife.

It will be for sure, but then it'll rain it'll flush through and it will be hugely nutrient-rich for next year.

...and thats kind of the issue......"IF" it rains in the usual quantity.

I think there's still plenty of winter rain on the Western Seaboard of Canada to give it a flush - the issue here was the false spate that fooled the salmon into running during a drought that stretched into the autumn - attached shows it pretty starkly

https://vancouver.weatherstats.ca/charts/precipita...

[2 GKC]

BBC of course blaming it on climate change

[Bonefish Blues]

2 GKC said:

BBC of course blaming it on climate change

That was a member of a research crew from Simon Fraser University in British Columbia which was out monitoring salmon in Neekas river I think.