Blog & Latest Updates
Fly Fishing Articles
Insects by Common Name
or register. |
Wiflyfisher | February 9th, 2023, 5:28 am | |
Wisconsin Posts: 663 | I thought Jason might like this. https://wiflyfisher.com/Measuring-the-Health-of-a-Trout-Stream.asp | |
John S. https://WiFlyFisher.com | ||
Jmd123 | February 12th, 2023, 12:30 pm | |
Oscoda, MI Posts: 2611 | Not just for trout streams...we used it on Little Otter Fork in southern IN. I do wonder what exactly is the source for the tolerance values...opinions? Hard data? Jonathon | |
No matter how big the one you just caught is, there's always a bigger one out there somewhere... | ||
Wiflyfisher | February 16th, 2023, 4:52 am | |
Wisconsin Posts: 663 | Hilsenhoff compiled data from more than 2000 sample sites collected in the 1979-1980 cooperative study with the Wisconsin DNR to reevaluate the tolerance values by comparing the tolerance values of each species with the average biotic index value of streams where that species was commonly found. The HBI is used all over the World. I see it as an alternative option to doing a chemical analysis to estimate the health of a stream. I do believe mayflies, caddisflies and stoneflies are the canaries in the coal mine. I recently found a stream where there is tons of farm sediment and runoff. Mayfly larvae are virtually non-existent, as samplings have shown, but the brown trout are doing fine. The stream is actually in poor health, which proves brown trout are more tolerant to organic pollution than mayflies. | |
John S. https://WiFlyFisher.com | ||
Title | Replies | Last Reply |
Re: Grannoms! In Fishing Reports by Martinlf | 4 | Apr 30, 2019 by Martinlf |
Re: My latest work project: fish & bugs (15 more) In the Photography Board by Jmd123 | 1 | Mar 2, 2021 by Red_green_h |
Brookville Lake, Indiana trout release In General Discussion by Konchu | 0 | |
Re: Spawning trout stream In General Discussion by Matija | 1 | Jun 13, 2018 by Wbranch |
Re: Huchen or Donausalmon In the Photography Board by Luc384 | 5 | Oct 11, 2007 by Luc384 |
european fisheries In General Discussion by Brooklover | 0 | |
Re: Fun with new entomology toys, and catching up on bug IDs In General Discussion by Troutnut | 9 | Dec 5, 2020 by Creno |
Re: What do you think? In General Discussion by Falsifly | 3 | Mar 6, 2013 by Crepuscular |
Re: 1 lb 4oz Brownie In Fishing Reports by Sla9104 | 3 | May 31, 2014 by Sla9104 |
Re: LAKE KHOBI (GEORGIA) In General Discussion by Kinalia | 4 | Jan 7, 2013 by Mcjames |