Register now on PaFlyFish.com! Login
HOME FORUM BLOG PHOTOS LINKS


Sponsors

Browsing this Thread:   1 Anonymous Users





New hatch appearance

Joined:
2013/5/28 12:09
From Lilly, PA
Posts: 126
Offline
I understand how changes in water quality, stream bed, etc... can drive certain non-tolerant insects from a stream. But how does a new hatch appear? Last year I saw a Yellow drake on a stream that my family and I fish several times a week. This year we saw a good many more. Prior to last year I have never seen a Yellow drake on this stream. I was just curious as to how they may have found there way to this stream.

Posted on: 6/6 8:44


Re: New hatch appearance

Joined:
2006/9/13 22:36
From Tioga co. formerly of bucks co.
Posts: 5598
Offline
flight, ducks, geese, eggs will stick to stuff. nature has her way with things. I have seen caddis here fly a mile away from the pine creek, doesn't take much for them to travel distance

Posted on: 6/6 13:16
_________________
sandfly

So many Fish, So little time !!!
from the outer edge of nowhere
fly tying and fishing ghillie..
https://www.facebook.com/BigMeadowsFlyShop




Re: New hatch appearance

Joined:
2013/5/28 12:09
From Lilly, PA
Posts: 126
Offline
Thank you. I didnt realize that eggs would last that long out of water. I dont know of any streams nearby that would have a yellow drake hatch. I hope they permanently establish themselves and become as good as the other hatches.

Posted on: 6/6 14:05
_________________
"Distrust any enterprise that requires new clothes"-Henry David Thoreau


Re: New hatch appearance

Joined:
2009/11/5 1:46
Posts: 150
Offline
There's an evalutionary reason that mayflies have winged adult stages. X-percent of the hatch is going to lost finding their way back to the stream. Some of those will end up colonizing new streams.

Posted on: 6/6 20:29


Re: New hatch appearance
Moderator
Joined:
2006/9/9 9:29
From Monessen, PA
Posts: 22406
Online
Since mayflies fly upstream after emergence, why aren't they found only in the headwaters? Hmmmm.

Posted on: 6/6 21:01
_________________
Peace, Tony


Re: New hatch appearance

Joined:
2006/9/21 0:02
From Pittsburgh
Posts: 4299
Offline
Fishing the little juniata for 30 years has been a real saga.
It had great hatches that kept getting heavier each year - until the big spill of whatever, wiped everything out in 1995.
Then the hatches started to slowly return.
Many of the things that it had before did come back - sulphers, gray fox, slate drake.
Some didn't - green drake, rhyocophila caddis, white fly
And one hatch that it didn't have before - the grannom - came on to be one of it's best hatches

I can barely keep track of what does and doesn't hatch there now - let alone try to figure out where they came from.

Posted on: 6/7 7:42


Re: New hatch appearance
Moderator
Joined:
2006/9/9 19:16
From Dallastown, PA
Posts: 7081
Online
Quote:

JackM wrote:
Since mayflies fly upstream after emergence, why aren't they found only in the headwaters? Hmmmm.


Jack,

Mayflys fly upstream in the adult stage (imago/spinner) to counteract the behavioral drift that occurs during their nymphal stage. Each morning and evening during the dawn and dusk for a period of about two hours the nymphs (some of them) release from the rocks and drift downstream making the food supply more readily available to fish in addition to redistributing the species farther through the watershed.

Converse to your question is the one asking; "if they didn't fly upstream, wouldn't they all eventually end up in the ocean?"

Its the cycle of the mayfly.

Posted on: 6/7 9:39
_________________
Don't hit me with them negative waves so early in the morning. Think the bridge will be there and it will be there. It's a mother, beautiful bridge, and it's gonna be there. Ok?


Re: New hatch appearance
Moderator
Joined:
2006/9/9 9:29
From Monessen, PA
Posts: 22406
Online
And so the original question is answered....

Posted on: 6/7 12:13
_________________
Peace, Tony


Re: New hatch appearance

Joined:
2008/1/31 17:19
From Pretty much everywhere at some point, Thorndale today.
Posts: 13548
Offline
I think the "how does a new hatch appear" is rather self evident. A better question is "why does a new hatch appear".

And at first thought, there's 2 reasons.

1. It's not new. It was native to the waterway, but changes in water quality/habitat drove it away. Now as things improve it comes back. It's not colonization, it's RE-colonization.

2. Changes in water quality/habitat were to it's benefit to colonize the stream. Some bugs like silt, for instance, so as a stream silts in, it becomes better for that bug. Water temperature changes. Perhaps changes in the populations of competing species as well.

Posted on: 6/9 13:06


Re: New hatch appearance

Joined:
2012/9/30 21:12
Posts: 153
Offline
A little tangentially OT but i had been wondering how mayfly populations don't inevitably end up "washing" downstream, unless they fly a considerable distance upstream... But I had never really heard the upstream flying mentioned. Interesting how they can know what upstream is..
Thanks for confirming that happens. Withiut flying or swimming upstream the population just doesn't work

Posted on: 6/22 17:22


Re: New hatch appearance

Joined:
2006/9/13 10:18
From LV
Posts: 7735
Offline
Quote:

JackM wrote:
Since mayflies fly upstream after emergence, why aren't they found only in the headwaters? Hmmmm.

Because they can drop their eggs anywhere from the time they molt the last time, until they die. Most streams that have certain bugs will have them through the suitable habitat areas of the stream from the headwaters to the mouth, or until the water quality changes and they won't survive.
It is also how new populations appear, where they haven't been seen before.

Posted on: 6/27 7:23


Re: New hatch appearance

Joined:
2006/9/13 10:18
From LV
Posts: 7735
Offline
Quote:

mikesl wrote:
But I had never really heard the upstream flying mentioned. Interesting how they can know what upstream is..


They don't 'know' what upstream is, it's genetically encoded into there behavior.

Posted on: 7/4 8:31


Re: New hatch appearance

Joined:
2009/10/15 13:45
From Eastern PA
Posts: 10291
Offline
Quote:

JackM wrote:
And so the original question is answered....


Circle of life, bro.

Posted on: 7/5 2:41


Re: New hatch appearance

Joined:
2009/10/15 13:45
From Eastern PA
Posts: 10291
Offline
Quote:

Chaz wrote:
Quote:

mikesl wrote:
But I had never really heard the upstream flying mentioned. Interesting how they can know what upstream is..


They don't 'know' what upstream is, it's genetically encoded into there behavior.


Do you think that is due to the natural need to "gain ground" from generally being in an environment that is constantly moving them down stream? What is the correlation with broken water in the reproduction cycle?

Posted on: 7/5 2:46






You can view topic.
You cannot start a new topic.
You cannot reply to posts.
You cannot edit your posts.
You cannot delete your posts.
You cannot add new polls.
You cannot vote in polls.
You cannot attach files to posts.
You cannot post without approval.

[Advanced Search]





Site Content
Login
Username:

Password:

Remember me



Lost Password?

Register now!
Stay Connected

twitterfeed.com facebook instagram RSS Feed

Sponsors
Polls
Will you be fly fishing this autumn?
Yes
No
Thinking about it
_PL_TOTALVOTES
The poll will close at 2014/10/31 17:56
1 Comment





Copyright 2014 by PaFlyFish.com | Privacy Policy| Provided by Kile Media Group | Design by 7dana.com