Fluvial, Adfluvial, and Resident In Layman's Terms?

[Tom Butler]

This is a good read regarding those "resident rainbows". Though a bit dated and only one river system, it shows how important they are.
SF

Wild rainbow trout critical to health of steelhead populations

CORVALLIS, Ore. - Genetic research is showing that healthy steelhead runs in Pacific Northwest streams can depend heavily on the productivity of their stay-at-home counterparts, rainbow trout. Steelhead and rainbow trout look different, grow differently, and one heads off to sea while the other...

today.oregonstate.edu

One of our streams especially behaves that way, much more so than others. Because of that endemic "steelhead" from the hatchery are not clipped, and it's darn near impossible to tell them from the resident redbands, no matter the life style they exhibit, and with which they will spawn.

 

[Tom Butler]

I have read where the amount of food, space/shelter and temperature may affect what a fish may do within a system with fish that exhibit these tendencies seasonally and yearly. This summer I notice less resident fish, so I'm wondering if the late flooding and high water in early summer may have lead more fish to go to the columbia or ocean than normal, or if something else is going on. I guess future logs notes will tell the story.

 

[Old406Kid]

I sure am glad that I only fly fish and not worry what a fish us going to do after it hatches. My brain is cluttered enough from being 87. I just don't have anymore space to use with this thread. I'm just and old man that is waiting for something.

Ya Know...if you wintered in AZ, like alot of the other old farts, instead of freezing your buns off in Butte you just might be considered to be 'fluvial'.

 

[Mossback]

Gotta wonder about that...
Butte in winter

 

[Old406Kid]

Gotta wonder about that...
Butte in winter

Brings back memories of my Billings Central high school football days, 63-67. When we played there they bussed us up to the School of Mines so we could suit up in an unheated locker room...then it was down to a field that was about like playing on pavement. The last time I played there it was about 9 degrees... I swear the locker room was the same.

 

[Mossback]

I here Butte is lovely in January....
Said no one ever...

 

[Mike Cline]

I have read where the amount of food, space/shelter and temperature may affect what a fish may do within a system with fish that exhibit these tendencies seasonally and yearly. This summer I notice less resident fish, so I'm wondering if the late flooding and high water in early summer may have lead more fish to go to the columbia or ocean than normal, or if something else is going on. I guess future logs notes will tell the story.

In the 1950s French scientists introduced a number of Salmonid species into the rivers of the Kerguelen Islandsin the South Indian Ocean. Only brook trout and brown trout established sustainable populations. Brook trout promptly established themselves in the headwaters and remained relatively small while the browns moved out to sea and became some of the largest sea run browns in the world feeding on an endless supply of copepods. The Trout’s Tale-The Fish that Conquered an Empire, Chris Newton (2013)