Fishing with Rod Discussion Forum

Fishing in British Columbia => General Discussion => Topic started by: Rodney on January 11, 2021, 05:35:35 PM

Title: Environmental changes and impacts on Pacific salmon
Post by: Rodney on January 11, 2021, 05:35:35 PM
This video is more of an educational one but I think many of you will be interested. It features an excellent presentation which biologist Sue Grant at Fisheries and Oceans Canada did a few weeks ago on the environmental changes (ocean temperatures, freshet timing, fluctuation of river level, forest fire...) and their impacts on Pacific salmon. I'd like you to join me at 7:00pm to watch this, participate in the live chat if you have questions about it. Go to:

https://www.youtube.com/watch?v=YocsTfI5Q6M

What do I hope to achieve by sharing this video? Too often presentations like this are never shared to the public, not because there isn't transparency but mostly because there isn't a tool to do so. I hope to deliver more of these in the future on this platform, to also recognize the hard work many dedicated scientists are carrying out.

Thank you again Sue for allowing me to share this to our audience.
Title: Re: Environmental changes and impacts on Pacific salmon
Post by: wildmanyeah on January 11, 2021, 05:39:14 PM
ohh and here i thought seals were the root of all evil.

Thanks for sharing
Title: Re: Environmental changes and impacts on Pacific salmon
Post by: RalphH on January 11, 2021, 06:00:27 PM
Thanks Rod. There is always a bounty of interesting information in presentations like this one. Looking forward to it.
Title: Re: Environmental changes and impacts on Pacific salmon
Post by: RalphH on January 12, 2021, 10:34:49 AM
More of the same grim news. I expect the DFO outlooks for this year will again be low as will actual returns for most stocks.

Worst news is the blob is back; the extensive reservoir of relatively warm water in the north east Pacific right where BC salmon like to do their ocean feeding. It's so extensive it seems to block the cooling effect of the La Nina currents to the south. These normally have a positive effect on ocean conditions for salmon.
Title: Re: Environmental changes and impacts on Pacific salmon
Post by: wildmanyeah on January 12, 2021, 10:41:56 AM
More of the same grim news. I expect the DFO outlooks for this year will again be low as will actual returns for most stocks.

Worst news is the blob is back; the extensive reservoir of relatively warm water in the north east Pacific right where BC salmon like to do their ocean feeding. It's so extensive it seems to block the cooling effect of the La Nina currents to the south. These normally have a positive effect on ocean conditions for salmon.

https://acsbc.ca/wp-content/uploads/2020/12/Preliminary_Outlook_2021_DRAFT.pdf

The only stock that may have decent returns locally is fraser Pinks, they have a really good escarpment in 2019 and if ocean conditions are comparable to 2018 then we could be in for a treat.
Title: Re: Environmental changes and impacts on Pacific salmon
Post by: CohoJake on January 12, 2021, 11:01:49 AM
Worst news is the blob is back; the extensive reservoir of relatively warm water in the north east Pacific right where BC salmon like to do their ocean feeding. It's so extensive it seems to block the cooling effect of the La Nina currents to the south. These normally have a positive effect on ocean conditions for salmon.

Where did you read this about the blob?  From the latest I have seen, the current blob is dissipating and it is more south - off the coast of Oregon and California.  https://www.integratedecosystemassessment.noaa.gov/regions/california-current/cc-projects-blobtracker (https://www.integratedecosystemassessment.noaa.gov/regions/california-current/cc-projects-blobtracker)
Title: Re: Environmental changes and impacts on Pacific salmon
Post by: RalphH on January 12, 2021, 11:34:21 AM
Where did you read this about the blob?  From the latest I have seen, the current blob is dissipating and it is more south - off the coast of Oregon and California.  https://www.integratedecosystemassessment.noaa.gov/regions/california-current/cc-projects-blobtracker (https://www.integratedecosystemassessment.noaa.gov/regions/california-current/cc-projects-blobtracker)

it was in the video. The focus was more on 2018 ans 2019 as returning salmon this year will have been at sea during this time. Ms Grant also presented ocean temperature maps for 2020 through into November:

https://youtu.be/YocsTfI5Q6M?t=1374
Title: Re: Environmental changes and impacts on Pacific salmon
Post by: wildmanyeah on January 12, 2021, 01:04:30 PM
it was in the video. The focus was more on 2018 ans 2019 as returning salmon this year will have been at sea during this time. Ms Grant also presented ocean temperature maps for 2020 through into November:

https://youtu.be/YocsTfI5Q6M?t=1374

terrible news, you can see La Niņa develop with the big red blob in the pacific notherwest.

big difference compared to La Niņa in 2007 https://en.wikipedia.org/wiki/La_Ni%C3%B1a#/media/File:Sea_Surface_Temperature_-_November_2007.jpg