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Old 20-12-2011, 08:17 AM
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Default Ocean Silver conference outlines progress of Salsea salmon project

Issued by the AST:

The 'Ocean Silver' conference held in London on 13 December, organised by the Atlantic Salmon Trust (AST) and co-hosted by The Fishmongers' Company and NASCO (the North Atlantic Salmon Conservation Organisation), drew a full-capacity audience of almost 200 delegates, who had travelled from all over the British Isles, Scandinavia and Canada.

The principal intention of the conference was to outline the implications of the recently-completed SALSEA-Merge (Salmon at Sea) research programme for management of salmon fisheries. Many of the principal scientists involved in SALSEA-Merge gave presentations, and there were also wide-ranging opportunities for questions and discussion. A highlight of the day was Jeremy Paxman’s live interview with AST Research Director, Professor Ken Whelan.

“The main message coming from all that we heard during Ocean Silver was that we need to sustain the marine work, but in the absence of the core research funding we’ve enjoyed for the past three years,” said AST Chairman Melfort Campbell. “Can we keep it going? It’s essential that we do. One thing that stood out for me was that only one Scottish and one Welsh index river were included in the SALSEA-Merge research – and none of the presenters at the conference were from the UK. Our government scientists want and need our help to ensure that the UK is at the table in future marine research.
We also need to make sure that we increase our knowledge of what’s happening to our salmon – and, importantly, our sea trout - in both estuaries and inshore waters,”

He continued:

“Much of what we heard at Ocean Silver underlines the importance of ecosystem management, and AST sees it as an important part of its role to ensure that salmon’s place in both the freshwater and marine ecosystems is fully recognised. It’s also crucial that the results of research are translated into practical help for river managers. It was our intention that Ocean Silver should serve that purpose, and I have been delighted to hear so many of the delegates tell me that they found the presentations both interesting and useful.”

Several speakers at the conference emphasised the need to seize opportunities to extend research on the marine life of salmon by making use of the pelagic fish surveys which take place year-on-year.

“We must move to an all-embracing vision of salmon populations which encompasses survival corridors stretching from the most remote spawning burn to the limits of the salmon’s migration pathways. As future decisions are made regarding the management of pelagic stocks in the North east Atlantic, it is imperative that salmon interests are at that table,” said AST Research Director Ken Whelan.

“By-catch from pelagic fisheries has an impact on the numbers of salmon which die at sea. If we assume there are three million salmon in the North Atlantic, if we can protect even a small fraction of these by understanding, and ultimately minimising, the impacts of pelagic fisheries – and that could be achieved by something as simple as getting the fishermen to lower the depth at which they’re trawling – that would be a job well done. In the context of the harvesting and overall management of herring, mackerel and blue whiting, the work of SALSEA-Merge has shown irrefutably that this is very clearly linked with the welfare and survival of the Atlantic salmon.”

“The Ocean Silver conference was a fitting end of the sampling stage of the EU's innovative SALSEA project, and a perfect follow-up to their Salmon Summit that revealed those findings,” commented AST Chief Executive Tony Andrews. “Hard questions were posed in the open session by guest interviewer Jeremy Paxman and members of the audience to the panel of scientists to link the SALSEA data with practical actions to improve the abundance and quality of Atlantic salmon. While it is very clear that there is a lot more work to be done, many people now appreciate that our vastly improved knowledge of the salmon's life cycle will inevitably improve the effectiveness of management in the long term.

“AST was a member of a small group that initiated the salmon at sea research nearly ten years ago. We are now determined to see the effects of that work carry through to better management in fresh water. The ultimate measure is more healthy smolts going to sea with a high proportion of them returning as adult fish,” added Mr Andrews.

Nigel Cox, Clerk (Chief Executive) of the Fishmongers' Company commented: "We were delighted with the outcome of this innovative conference, which was attended by a wide range of interested parties, including some of the foremost scientists working on the North Atlantic salmon. It showed how important collaboration and partnerships are, both between different countries and between the public and private sector, in dealing with such complex challenges as understanding the salmon's life at sea. The Fishmongers' Company is increasingly focussing its work on helping fisheries management organisations to build effective partnerships of this kind and on providing a forum for such firmly science-based debate. We were very happy to be able to contribute to the AST's initiative and congratulate them on its success."
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Old 21-12-2011, 06:42 PM
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Default Re: Ocean Silver conference outlines progress of Salsea salmon project

I agree it was fascinating. The things that have stuck in my head were
- the huge variation in the performance of the 4 main feeding areas (which explains why Iceland is doing so well)
- the varying growth and survival rates for different age for S1, S2 and S3 smolts, and the early check for the S1's.
- the fact that the start of a marine survival record (the 1970's) probably represents an all time high for marine survival as stocks of pelagic competitors were at an all time low
- the massive annual variation in the effect of the ocean currents on the movement of smolts to their prime feeding areas. It provided to me a plausible explanation for why 2009's smolts have done so well when the north Norwegian area is performing so badly.

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Originally Posted by cb View Post
. One thing that stood out for me was that only one Scottish and one Welsh index river were included in the SALSEA-Merge research – and none of the presenters at the conference were from the UK.
I did notice one Scottish accent on the podium.

Would have been nice to talk.
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Last edited by Simon Evans; 21-12-2011 at 06:45 PM.
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Old 21-12-2011, 07:03 PM
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Default Re: Ocean Silver conference outlines progress of Salsea salmon project

Quote:
Originally Posted by Simon Evans View Post
I agree it was fascinating. The things that have stuck in my head were
- the huge variation in the performance of the 4 main feeding areas (which explains why Iceland is doing so well)
- the varying growth and survival rates for different age for S1, S2 and S3 smolts, and the early check for the S1's.
- the fact that the start of a marine survival record (the 1970's) probably represents an all time high for marine survival as stocks of pelagic competitors were at an all time low
- the massive annual variation in the effect of the ocean currents on the movement of smolts to their prime feeding areas. It provided to me a plausible explanation for why 2009's smolts have done so well when the north Norwegian area is performing so badly.



I did notice one Scottish accent on the podium.

Would have been nice to talk.
Hi Simon,
Is there any more reading material from this very interesting project you can offer?
Re the comment 'one thing that stood out for me was that only one Scottish and one Welsh index river were included in the SALSEA-Merge research – and none of the presenters at the conference were from the UK' why do you think that was and am I to assume the Wye is the Welsh index river?
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Old 21-12-2011, 07:49 PM
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Default Re: Ocean Silver conference outlines progress of Salsea salmon project

Quote:
Originally Posted by Letton One View Post
am I to assume the Wye is the Welsh index river?
Exactly my thought, and that for a Belgian. Does intrigue me though...

Johan
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Old 21-12-2011, 07:53 PM
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Default Re: Ocean Silver conference outlines progress of Salsea salmon project

its probably the Dee
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Old 22-12-2011, 07:42 AM
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Default Re: Ocean Silver conference outlines progress of Salsea salmon project

A couple of things that I find interesting are that this Salsea Merge appears to be a project based on the North East Atlantic and doesn't appear to apply to Greenland fisheries. I may be wrong, if so please correct me, but more information is available here

the use of 'the fact' and 'probably' in the same sentence is a little odd

Quote:
- the fact that the start of a marine survival record (the 1970's) probably represents an all time high for marine survival as stocks of pelagic competitors were at an all time low
Is sea survival improving?
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Old 22-12-2011, 01:07 PM
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Default Re: Ocean Silver conference outlines progress of Salsea salmon project

It is probable that based on the numbers of pelagic competitors (with which it was suggested that there was an inverse correlation) that the late 60's - mid 70's represented an all time high for marine survival. The data set does not go further back so we really don't know, and the pelagic species were at an artifically low level due in part to recent human pressures.

In 1974, and 1976 it is esitmated that 50% the smolts that left the North Esk came back as adult salmon. That compares with esimates of around 8-10% now. Survival to the Welsh Dee and Tamar has been esimated at less than 3% in recent years.

Sea survival is increasing for which stocks? It was presented that for Icelandic salmon, that feed in the Imarssuak sea things are looking pretty good. For southern European stocks that have to migrate through a feeding desert and then spend 1 or 2 years in the poorly performing North Norweigan sea region..definately not!
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Old 23-12-2011, 09:15 AM
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Default Re: Ocean Silver conference outlines progress of Salsea salmon project

Simon, what kind of impact do you think the Greenland drift nets for instance had on the MSW fish feeding in that area in the 70's and 80's. Isn't sea survival a man made issue? I see from the graph on your website that sea survival is now improving?
Aren't the Norwegians also over netting their waters? Which rivers from southern europe have salmon that feed in the Norwegian sea?
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Last edited by stealth_fox; 23-12-2011 at 09:21 AM.
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Old 24-12-2011, 09:52 AM
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Default Re: Ocean Silver conference outlines progress of Salsea salmon project

Quote:
Originally Posted by stealth_fox View Post
Simon, what kind of impact do you think the Greenland drift nets for instance had on the MSW fish feeding in that area in the 70's and 80's.
Don't know if its been quantified, even with fishery operating marine survival was 25-50%. I would be happy with that now!

Quote:
Originally Posted by stealth_fox View Post
Isn't sea survival a man made issue?
It doesn't seem so. The ideas that the post smolts are being lost in mackerel by-catch is fading. The main drivers appear to be long term ecological and climatic cycles. Man is having some effect on these cycles such as the reduction in large predators creating rapid boom and bust in the salmons pelagic competitors and global warming affecting the ocean current and climatic cycles.

Quote:
Originally Posted by stealth_fox View Post
I see from the graph on your website that sea survival is now improving?
2009's smolts did relatively well (still only 20% of the levels of the 70's). Jury is out on 2010's, but IMHO it's a bit early to say we have turned the corner given 30 years of steady decline culminating in the appalling returns from 2007 and 2008's smolt output..

Quote:
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Aren't the Norwegians also over netting their waters?
In the fjords. There management of their offshore waters in exemplary.

[QUOTE=stealth_fox;1176838]Which rivers from Southern Europe have salmon that feed in the Norwegian sea?

The 'Southern European stock' is a term used to lump together salmon from Eire, Southern UK, France, Spain and Germany. These all feed in the North Norwegian sea during their first year.
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Old 24-12-2011, 11:05 AM
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Default Re: Ocean Silver conference outlines progress of Salsea salmon project

Quote:
Don't know if its been quantified, even with fishery operating marine survival was 25-50%. I would be happy with that now!
the wuf graph shows sea survival to range from 14% to 31% from 1978 to 1990 and on a continuing decline. Do you think that there is a critical point at which the salmons survival is affected by an overall drop in numbers? I note that in the Greenland net fishery in say 1971 2689 mteric tons were caught, by the late 80's this had reduced to approx 840 tons (by quota) but over the years 1988 to 1989 despite the quota being 8-900 the actual catch never reached even half of that quota and has been dramatically less since.

Quote:
The 'Southern European stock' is a term used to lump together salmon from Eire, Southern UK, France, Spain and Germany. These all feed in the North Norwegian sea during their first year.
Is that a proven fact or is it based on probability assumptions? (Im not being cynical just curious)
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Last edited by stealth_fox; 24-12-2011 at 11:12 AM.
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