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#225610 - 12/31/03 11:31 PM Cross spawning?
minibear Offline
Returning Adult

Registered: 11/25/02
Posts: 254
Loc: T-town
I know there is some knowledge out there to be shared on this issue, so how often or if at all do 2 different species of fish spawn with each other? confused

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#225611 - 01/01/04 12:01 AM Re: Cross spawning?
eyeFISH Offline
Ornamental Rice Bowl

Registered: 11/24/03
Posts: 12766
cutthroat x rainbow = cutt-bow... very common in major tailwater trout fisheries.

pink x chinook = pinook.... established population in Great Lakes.

pike x musky = tiger musky ... stocked all over Midwest and Canada

brook trout x lake trout = splake.... commonly stocked in Midwest and Canada

coho x chinook = ??? conooks or chilvers ??? never heard of 'em until the Lewis article. Where I grew up in Alaska, this would never happen as run timing separates these species by one to three months., but here in the PNW where both species return in the fall, it seems probable. Must have poor survival traits overall or we would see a lot more of them.

Hatchery managers like these hybrids for stocking purposes because they are for the most part sterile and can't produce mutant offspring to interfere with wild stocks. They eventually become a put and take product for lakes.

Wonder if anyone has considered making sterile hatchery steelhead to minimize wild interaction? Problem is they probably couldn't get them to move into the river to spawn since they wouldn't have any viable sex organs.
_________________________
"Let every angler who loves to fish think what it would mean to him to find the fish were gone." (Zane Grey)

"If you don't kill them, they will spawn." (Carcassman)


The Keen Eye MD
Long Live the Kings!

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#225612 - 01/01/04 12:19 PM Re: Cross spawning?
Preston Singletary Offline
Returning Adult

Registered: 03/29/99
Posts: 387
Loc: Seattle, WA USA
Many salmonid species can interbreed and even produce fertile offspring, but in natural circumstances such crossbreeding occurs only rarely . Reproductive isolation is normally assured by such things as different spawning timing and different preferences in spawning habitat. Cutthroat/rainbow hybridization, for instance, is not a serious problem between coastal cutthroat (Oncorhynchus clarki clarki) and coastal rainbow/steelhead (O. mykiss irideus) in the coastal rivers where they evolved together. In this case, although the spawning timing is similar, the preferred spawning locations are quite different. In areas where the rainbow is an introduced species (including most of the western US outside of the coast and the Columbia River basin) crossbreeding with the other cutthroat subspecies has become a very serious problem, bringing several of them near to extinction.
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#225613 - 01/01/04 12:30 PM Re: Cross spawning?
Dave Vedder Offline
Reverend Tarpones

Registered: 10/09/02
Posts: 8587
Loc: West Duvall
Don't forget the coho walleye cross the Kowalski!
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No huevos no pollo.

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#225614 - 01/01/04 12:52 PM Re: Cross spawning?
Beerman Offline
Parr

Registered: 11/07/03
Posts: 43
Loc: Dupont
Surecatch, don't forget the ever popular bullhead crappie cross.
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#225615 - 01/01/04 02:30 PM Re: Cross spawning?
floatandjig Offline
Juvenille at Sea

Registered: 12/31/03
Posts: 154
Loc: Puyallup
Brown Trout + Brook Trout= Tiger Trout


Tiger trout are stocked exclusively in some Eastern Washington lakes.

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#225616 - 01/01/04 04:00 PM Re: Cross spawning?
papaslap Offline
Spawner

Registered: 07/02/03
Posts: 660
Loc: Olympia
Dave, isn't the major problem with the Kowalski's is that they don't know how to swim. babble
_________________________
"Hunting is the only sport that I know of, in which one of the participants doesn't know that he is in the game." John Madden

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#225617 - 01/01/04 04:07 PM Re: Cross spawning?
eyeFISH Offline
Ornamental Rice Bowl

Registered: 11/24/03
Posts: 12766
Dave

You forgot one piece:

(coho x walleye) x musky = Kowalski laugh
_________________________
"Let every angler who loves to fish think what it would mean to him to find the fish were gone." (Zane Grey)

"If you don't kill them, they will spawn." (Carcassman)


The Keen Eye MD
Long Live the Kings!

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