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Chinooks in the Great Lakes
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Waterloo Angler
Post subject: Chinooks in the Great Lakes
PostPosted: Sun Jul 26, 2009 10:19 pm
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What would happen if the MNR stopped stocking chinooks in the Great Lakes? I know the natural reproduction is very limited, so I was thinking they'd be gone in maybe.....10.....12 years? What do you think?.....there are smarter people on this board than me. I'm mainly a Lake O. angler, so I don't know as much about natural reproduction in the other lakes.
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Bof
Post subject: Re: Chinooks in the Great Lakes
PostPosted: Mon Jul 27, 2009 8:55 am
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Location: Northern Ontario, Canada
Actually...the MNR does not stock any Chinook Salmon and the only Pacific Salmon that are stocked in Ontario are done so by clubs and organizations. The pacific salmon fishery on our side great lakes is currently made up of an average of somewhere in the hood of 70-80% natural reproduction or more depending on where you are.
So what would happen if the MNR stopped stocking Chinook...well, exactly what's out there now!
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John from CRAA
Post subject: Re: Chinooks in the Great Lakes
PostPosted: Mon Jul 27, 2009 4:41 pm
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Location: Streetsville, ON
Chris (aka chromerman) has some great info on Lake Huron and Gbay stats. I beleive he said 92% of Gbay chinook were wild based on creel and clip studies.
There are mixed reports on Lake Ontario. One study estimated 70% wild, another only 20% wild. Based on the level of adipose clipped shakers I've seen it looks like more than half wild (but this is preliminary). In a couple years when all chinook age groups have the adipose clip we will know for sure. My guess - 50-70% wild chinooks, with eastern GTA tribs at 90% plus wild since they have no direct stocking.
The bottom line is chinooks are reproducing in most Ontario tribs and doing very well. Give the fish half a chance and they will surprise all of us!
John
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Waterloo Angler
Post subject: Re: Chinooks in the Great Lakes
PostPosted: Mon Jul 27, 2009 10:05 pm
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Wow, things are much better than I thought they were. Thanks for the responses. I'm looking forward to getting out pier chucking soon.
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kosta
Post subject: Re: Chinooks in the Great Lakes
PostPosted: Tue Jul 28, 2009 11:27 am
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Location: Vaughan, ON
...just curious
What are the reports on returning Pacific Salmon numbers to GL tributaties, north shore L.O. for example?
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Bof
Post subject: Re: Chinooks in the Great Lakes
PostPosted: Thu Jul 30, 2009 10:44 am
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Location: Northern Ontario, Canada
Just an FYI -
Yesterday I completed an assessment in the extreme headwater of a small GL's tributary. The assessment was done to determine the success of this springs steelhead spawn however it is a stream used by all migratories.
First off...the reason for the assessment was the stretch had recently been rehabed from a pond type area into a meandering stream section built specifically for spawning migratories. I saw numbers of larval steelhead in the rehabed section I never thought possible...rehab and stream enhancement WORKS.
Secondly and more importantly to this thread...we also noted that not one juvenille chinook was captured however there was a HEAVY population of Juvenille coho.
Conclusion...the Chinook fishery might be faltering here and there but the Coho population seems to be doing extremely well. Here is a picture of a yearling Coho taken yesterday.
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John from CRAA
Post subject: Re: Chinooks in the Great Lakes
PostPosted: Thu Jul 30, 2009 10:59 am
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Location: Streetsville, ON
Cool info Bof. Amazing what some stream rehab can do. If you build it (or rehab it) they will come!
Down this way the vast majority of chinook parr leave the system in May of the same year they are born. However some fall chinook parr and yearling chinook have been appearing more in eastern tribs in recent years. And I have heard numbers of yearling chinook have been found in past years on southern Gbay tribs (Chris A can add to that). The chinooks seem to be making some adaptive changes in some systems.
I have not heard anything from the north shore for life history.
Was that stream near your favourite steelie stream close to home?
John
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chromerman
Post subject: Re: Chinooks in the Great Lakes
PostPosted: Fri Jul 31, 2009 7:09 pm
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Sorry guys been in the Peg for the last week so have not been on here. Ok for Georgian Bay the number is 92% wild and 75% on Lake Huron. This is based on 100% marked fish fin clipping in Ontario and chemical marking in Michigan. Interesting thing about this is that it is from both the US and the Cdn side combined. The release sites in Michigan which are places like Jordan Harbour had high (90%+) hatchery markings. These sites don't have the ability to produce fish, but the boats leaving those ports were returning with 75% unmarked fish. Meaning that most of the fish in the lake had to be hatchery. Sample size on the Notty was 161 fish all wild.
Now in Lake Ontario those rivers have clouds of juvenile chinnys but I don't know if fish moving out a month after hatching contribute to the population. I was doing electro shocking on the Pine in October and for every juvenile steelie we got 10 juvenile nooks meaning they were spending at least 6 months in the river. My guess is if you stopped stocking you might see an impact in the west end but nothing out east.
Chris Atkinson
aka Chromerman
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Boyd
Post subject: Re: Chinooks in the Great Lakes
PostPosted: Sat Aug 01, 2009 1:24 pm
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Location: Springwater Township
Pine's still pumping out nooks in numbers despite small returns from the lake 8) Anyone know what the deal is with those nooks with a yellow spot on em in G-Bay? Heard it was a hatchery marking from Michigan and was wondering if anyone has any info. Peace.
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Mykiss7
Post subject: Re: Chinooks in the Great Lakes
PostPosted: Sat Aug 01, 2009 4:28 pm
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Location: Thunder Bay
In Canadian waters of Lake Superior close to 100 % of adult chinook salmon are now wild with close to 40 years of natural selection (introduced from the Pacific Northwest in 1969). They have developed local adaptations based on environmental characteristics of their home tributary and the big lake. Stocking on top of existing wild populations decreases fitness and survival of these established populations. If we constructively manage habitat and exploitation chinook and other salmonids will support a wonderful and diversified sport fishery.
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chromerman
Post subject: Re: Chinooks in the Great Lakes
PostPosted: Sat Aug 01, 2009 7:45 pm
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Boyd according to the LHMU that yellow dot is not a hatchery marking but some sort of genetic anomolie. We took the fish that had the mark and checked them and there was no correlation between the dot and the chemical marker from Michigan. Weird eh?
CM
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Boyd
Post subject: Re: Chinooks in the Great Lakes
PostPosted: Sun Aug 02, 2009 9:45 am
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Location: Springwater Township
Weird for sure but good to know. Thanks Fish with that dot seem to be a different strain than most of our wild nooks here and are generally bigger. Won't be long now with amount of water on the move 8) Peace.