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> Lake Nipissing MNR results, MNR netting results
smalleye99
Posted: Dec 02, 2017 - 08:44 pm


Alevin
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I was out fishing for muskie on Nipissing and watched an MNR crew doing some netting for walleye this fall. They said they do this every year. Anybody ever see reports on this stuff. Is there somewhere I can find it online?

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Grumpa
Posted: Dec 03, 2017 - 12:35 am


Lunker Trout
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smalleye99....if you saw this activity in October or early November it's most likely the FWIN (Fall Walleye Index Netting survey).
This is the annual fall walleye population assessment.

http://westnipissingouest.com/2017/10/onta...alleye-fishery/

It's now been ongoing for the past 20 years, the first assessment took place in 1998 and then every fall since.
The netting survey gathers important biological information such as fish length, weight, age and abundance.
The results of the FWIN's are then included with each springs' spawning assessments (from various locations around the lake), creel surveys conducted throughout the year and numerous biological and dietary studies undertaken...all of this information and data is combined and analyzed to help guide the OMNRF with it's ongoing fishery management plan for the lake.
This is the FWIN manual and methodology-

http://lnsbr.nipissingu.ca/wp-content/uplo...IN-protocol.pdf

And here is the November 2016 report from an independent (3rd party) panel of experts, commissioned by the OMNRF to review and corroborate its fisheries data....it conveniently summarizes and interprets some of the FWIN's findings-

https://vmcdn.ca/files/baytoday/files/nipis...nal_nov2016.pdf

Plus the 2017 report from Doris Smith on the sustainability of the lake's walleye fishery (which employs FWIN findings as well)-

http://nbdcc.ca/wp-content/uploads/2017/05...rt-May-18th.pdf

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smalleye99
Posted: Dec 03, 2017 - 02:57 pm


Alevin
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Wow what a wealth of info.

Thanks. I'll have a read. I bet most of this wasn't well reported on by the paper...like what does it mean.

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smalleye99
Posted: Dec 05, 2017 - 07:29 am


Alevin
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Grumpa, this is a heavy read. Near the end of the external review paper it says IF fish below 46cm are being harvested by recreational anglers or commercial fishermen (guarantee they are in large numbers) then the safe level of fishing mortality would have to be lower than 0.18

The dotted line in figure 13 is the safe value of 0.18 and should be lowered in that graph. The paper says mortality is over the safe value of 0.18 in 11 of 18 years and given that value should be lower I wager that values in 2011, 2014 and 2010 in figure 13 could be added to the list.

That would mean the statement by the external writer should have said 14 out of 18 years management has failed the lake. Not only that but mortality went back above the line in the last few years.

Ouch.

Might we be seeing the results of this fall netting every year if it was good news?

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