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  #1  
Old 11-01-2017, 09:11 AM
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Default Wye Discussion 2017

Happy New Season to you all.

Let's hope this year we can discuss this beautiful river with a respect for one another.

Cheers

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  #2  
Old 11-01-2017, 09:32 AM
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Default Re: Wye Discussion 2017

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I notice that SF has not been able to identify the section of the report that confirms his account of the number of broodstock used. No page reference has been supplied.

In contrast anyone can see that on page 8 the anonymous author of the report subtracts 81 fish from the claimed returners to identify the net gain for the river. This 81 can only be broodstock.
Thanks for this Tom

If the number of broodstock used in SNR was 81 (40 hens) then it would be likely that they would produce 240,000 eggs which would produce approx 220,000 parr. Therefore the claim '81 broodstock used' would come immediately under suspicion.
One would then go and look at the SNR report here one would then find that on page 8 the writers of the report refer to other well known scientists making a case for stocking and using 100,000 eggs as an example (SNR used 103,944 thats 17 hens at an average of 6,114 eggs per hen and average 5502 parr per hen.)
Quote:
Farooqi,M.A & Aprahamian,M.W [1995] making a case for hatchery rearing, proposed 100,000 eggs reared to fed fry and released to streams would produce 208 returning adults, a rate of 0.20%. Suggesting the same number of eggs laid in the natural environment would result in 81 returning adults, rate of 0.08%.
Using these figures its fairly clear to just about anyone that the SNR exercise having produced a gross return of 373 to 410 adults to date, has by this measure resulted in a net gain to the river in the range of 292 to 329 adult fish.
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Last edited by stealth_fox; 11-01-2017 at 09:54 AM.
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Old 11-01-2017, 09:59 AM
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Default Re: Wye Discussion 2017

Wye Discussion 2016

Quote:
It's been obvious for a few years that there is a switch to MSW fish and spring run MSW in particular on a number of rivers. Part of the problem with low catches in recent years is that anglers haven't adapted their behaviour to suit. For instance, Fred Higham recently reported in T&S that catch per unit effort was much better in May than in September on the Ribble.

The fact that the Wye is taking advantage of this swing is a vindication of the WUF 'build it and they will come' strategy, surely?
So what has happened to what they have built?

In 2016 the following electrofishing report shows a decline of 50% compared to the 5 year average of both fry and parr. One must ask, how robust was the habitat work and is it working? The Usk fared even worse .....

http://www.wyesalmon.com/wp-content/uploads/2016/11/Wye-Juvenile-Salmonid-Summary-2016-1.pdf
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Last edited by stealth_fox; 11-01-2017 at 10:05 AM.
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Old 11-01-2017, 11:07 AM
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Default Re: Wye Discussion 2017

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Originally Posted by stealth_fox View Post
Thanks for this Tom

If the number of broodstock used in SNR was 81 (40 hens) then it would be likely that they would produce 240,000 eggs which would produce approx 220,000 parr. Therefore the claim '81 broodstock used' would come immediately under suspicion.
One would then go and look at the SNR report here one would then find that on page 8 the writers of the report refer to other well known scientists making a case for stocking and using 100,000 eggs as an example (SNR used 103,944 thats 17 hens at an average of 6,114 eggs per hen and average 5502 parr per hen.)


Using these figures its fairly clear to just about anyone that the SNR exercise having produced a gross return of 373 to 410 adults to date, has by this measure resulted in a net gain to the river in the range of 292 to 329 adult fish.
...373 to 410 adults calculated from 12 reported fin clips...

That's where you fall down Peter...the preposterous way in which you desperately tried to manufacture that baseless return figure in the light of disappointing returns.

You've even invented the theory that only 7 OR 8 sample beats were used to get there!

Last edited by commando1; 11-01-2017 at 11:48 AM.
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Old 11-01-2017, 11:30 AM
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Default Re: Wye Discussion 2017

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the preposterous way I need which you
? can you elaborate?

It seems only right that this coming year WUF should support the reporting of fin clipped fish fully, including notes on their website and on ticket sales etc.

So this 50% decline in juveniles. How come the temporal site at Dernol doesn't appear to have fared so badly? This is the site where no habitat work has been done?
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Old 11-01-2017, 11:51 AM
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Default Re: Wye Discussion 2017

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Originally Posted by stealth_fox View Post
? can you elaborate?

It seems only right that this coming year WUF should support the reporting of fin clipped fish fully, including notes on their website and on ticket sales etc.

So this 50% decline in juveniles. How come the temporal site at Dernol doesn't appear to have fared so badly? This is the site where no habitat work has been done?
What do you know about the Dernol Peter? (You're repeating yourself by the way)

There are lots of other sites that haven't suffered either Peter. On the flip side there are some untouched sites that HAVE suffered.

Back to the topic of your WSA maths...how do you convert 12 fin clips to 400 odd returnees?
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Old 11-01-2017, 11:53 AM
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Default Re: Wye Discussion 2017

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What do you know about the Dernol Peter? (You're repeating yourself by the way)
enough having been there many times.

Quote:
There are lots of other sites that haven't suffered either Peter. On the flip side there are some untouched sites that HAVE suffered.
name some then?
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Old 11-01-2017, 03:59 PM
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Default Re: Wye Discussion 2017

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Originally Posted by Editor View Post
Happy New Season to you all.

Let's hope this year we can discuss this beautiful river with a respect for one another.

Cheers


More chance of a 50lber coming out on opening day!
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Old 11-01-2017, 04:45 PM
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Default Re: Wye Discussion 2017

Every chance of that Rossjames
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Old 11-01-2017, 04:54 PM
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Default Re: Wye Discussion 2017

Has anyone given you odds on that Ross?
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