Blog & Latest Updates
Fly Fishing Articles
Insects by Common Name
or register. |
CharlieSawd | May 22nd, 2009, 4:33 pm | |
St. Michael, Minnesota Posts: 26 | I am curious if any of you have come across any literature, or know personally why dry conditions (low precipitation and stream level) affect mayfly and caddis hatches. At first, the answer may seem intuitive, but upon further scrutiny, I am finding that is not the case. Any help would be appreciated. Thanks, | |
Charlie Sawdey www.driftlessflybox.com | ||
Willmilne | May 22nd, 2009, 4:57 pm | |
Manitoba Canada Posts: 19 | Hi This paper dicusses diversity and densities in an unstable stream environment http://www.famu.org/mayfly/pubs/pub_f/pubflannaganj1991p333.pdf[ and this one has some interesting data regarding flow variations and emergence densities http://www.famu.org/mayfly/pubs/pub_f/pubflannagaj2001p97.pdf hope that helps Will | |
Konchu | May 22nd, 2009, 6:38 pm | |
Site Editor IndianaPosts: 505 | That IS a deceptively difficult question to answer. Here's a few thoughts and observations. No more than that. Several local insect species develop much more quickly when the water levels drop and flow slows. One part of this is that the stream temperature increases and so does the metabolism of the bugs. In a nearby stream that I visited about an hour ago, for example, the insects are developing pretty quickly now. We had near flood conditions about a week ago, but the stream has dried to a mere trickle this weekend. The populations of bugs are really concentrated, and I'm guessing they'll pop out any day, if they haven't already started. I saw some fish rising and kissing the water's surface. I heard even more of this from nearby pools. | |
Title | Replies | Last Reply |
Name basis..... In Maccaffertium ithaca Mayfly Nymph by Quillgordon | 0 | |
Re: Flies getting smaller In General Discussion by GoofusBug | 7 | Jan 3, 2009 by Martinlf |
Re: Wolf River In General Discussion by John | 2 | Apr 16, 2008 by Bflat |
Re: Help what is this In the Identify This! Board by Xavier_Carp | 9 | Aug 10, 2007 by Konchu |
Re: Hecuba In General Discussion by Sayfu | 12 | Aug 14, 2012 by Sayfu |
Re: Where To Find Trico Nymphs In the Mayfly Genus Tricorythodes by Lastchance | 3 | Jul 10, 2011 by Entoman |
Re: Edwards Run In General Discussion by Crozetian | 1 | Feb 11, 2020 by Wbranch |
Re: Take Lessons or Just Wing It? In General Discussion by EatStayPlay | 12 | Jun 27, 2010 by Jmd123 |
Re: Lepto question In the Mayfly Family Leptophlebiidae by JasonM | 1 | Mar 7, 2010 by Taxon |
Re: yellowish possibly night hatching mayfly In the Identify This! Board by Aafloyd | 20 | Nov 1, 2011 by Jmd123 |