Bull Trout

rw wrote in message ...

http://www.fishingwithrod.com/fishing_0601_04.html

According to this web site, even though the two species look very similar,
they actually are not as closely related as the similarity suggests. It

That site points to research indicating they can breed and produce
fertile offspring. Sounds like a single species to me. (All other
"scientific" reasons for declaring a new species are, IMO, grounded
only in the scientist's desire for recognition and/or career
advancement ;-)

Jon.

Jonathan Cook wrote:

rw wrote in message ...

http://www.fishingwithrod.com/fishing_0601_04.html

According to this web site, even though the two species look very similar,
they actually are not as closely related as the similarity suggests. It


That site points to research indicating they can breed and produce
fertile offspring. Sounds like a single species to me. (All other
"scientific" reasons for declaring a new species are, IMO, grounded
only in the scientist's desire for recognition and/or career
advancement ;-)


I'm up in the air about that. For me, it's more complicated than that.
Some different species can be bred and produce fertile offspring but it
can only be done in the lab. That seems like different species to me.
Some different species can breed and produce fertile offspring on their
own but don't in the wild because of different behavioral patterns.
These too seem like different species to me.


Willi

Willi wrote:


I'm up in the air about that. For me, it's more complicated than that.
Some different species can be bred and produce fertile offspring but it
can only be done in the lab. That seems like different species to me.
Some different species can breed and produce fertile offspring on their
own but don't in the wild because of different behavioral patterns.
These too seem like different species to me.


There's evidence that in the Skagit river there are three natural
populations, Dollies, Bulls, and hybreds. There are also cutthroat and
rainbow trout, and hybreds of these. Both populations of hybreds are
viable, I don't know the details about their numbers, and how much
breeding the hybreds actually do.

Apparently there are significant enough differences in the genes that
they stick to the notion that bulls and dollies are different species.
I'll know more next week.

Chas
remove fly fish to reply
http://home.comcast.net/~chas.wade/w...ome.html-.html
San Juan Pictures at:
http://home.comcast.net/~chasepike/wsb/index.html

That site points to research indicating they can breed and produce
fertile offspring. Sounds like a single species to me. (All other
"scientific" reasons for declaring a new species are, IMO, grounded
only in the scientist's desire for recognition and/or career
advancement ;-)


Question for you West coast guys.

Do Redside Rainbows and Steelhead share any watersheds?

If so do they interbreed?

Willi

"Willi" wrote in message
...
Question for you West coast guys.
Do Redside Rainbows and Steelhead share any watersheds?
If so do they interbreed?
Willi


The Redside, like the Golden were once Rainbows, but were
isolated and developed different coloration. They do not share
the same water with Steelhead or Rainbows. If they did they
would interbreed and return to the dominant strain which is
Rainbow.
Ernie

Ernie wrote:

"Willi" wrote in message
...

Question for you West coast guys.
Do Redside Rainbows and Steelhead share any watersheds?
If so do they interbreed?
Willi



The Redside, like the Golden were once Rainbows, but were
isolated and developed different coloration. They do not share
the same water with Steelhead or Rainbows. If they did they
would interbreed and return to the dominant strain which is
Rainbow.
Ernie

I thought the Redside was your native Rainbow. How about this, do
Steelhead and nonmigratory Rainbows share the same watershed and do they
interbreed?

Willi

"Willi" wrote in message
...

I thought the Redside was your native Rainbow. How about this, do
Steelhead and nonmigratory Rainbows share the same watershed...

Yes, they do.

...and do they interbreed?

According to Robert Behnke in his excellent "Trout and Salmon of North
America," occasional interbreeding does occur. He goes on to say that
"Reproductive isolation, although not complete, must be sufficient to
maintain the integrity of the hereditary basis that separates steelhead and
resident rainbow trout."

Cheers,
Bill

"Willi" wrote in message
...
I thought the Redside was your native Rainbow. How about this,
do
Steelhead and nonmigratory Rainbows share the same watershed
and do they
interbreed?
Willi


Willi, I am sorry, I was speaking of the Redband Trout, not the
Redside Trout. The Redband is native to a few streams in
California.
Ernie

"Willi" wrote in message
...



That site points to research indicating they can breed and produce
fertile offspring. Sounds like a single species to me. (All other
"scientific" reasons for declaring a new species are, IMO, grounded
only in the scientist's desire for recognition and/or career
advancement ;-)


Question for you West coast guys.

Do Redside Rainbows and Steelhead share any watersheds?

If so do they interbreed?

Willi


The Deschutes is famous for both Redsides and Steelhead. To my knowledge,
they are genetically indistinguishable. Some Steelhead fingerlings never go
to sea and become resident Redsides and some Redsides go to sea and become
Steelhead. Several other rivers in the vicinity have the same situation.
The reason some rainbows exhibit anadromy, while others in the same system
do not, is a mystery to fish biologists. The Steelhead in the coastal
streams are derived from a different strain of rainbow than the Redsides of
the interior streams. In most coastal streams virtually all the rainbows
become Steelhead. The resident fish in these streams are cutthroat, though
some of the cuttthroat also exhibit a degree of anadromy - going to the near
shore salt for periods of 3-6mos. and returning as Searun Cutts of 13-18".
Inch for inch they are better fighters than steelhead.


--
Bob Weinberger
La, Grande, OR

place a dot between bobs and stuff and remove invalid to send email

Bob Weinberger wrote:
snip
The resident fish in these streams are cutthroat, though
some of the cuttthroat also exhibit a degree of anadromy - going to the near
shore salt for periods of 3-6mos. and returning as Searun Cutts of 13-18".
Inch for inch they are better fighters than steelhead.

That's interesting. I've found on inland waters that rainbows fight
and jump very well, cutts do neither and cutbows are, as you'd expect,
kinda half-assed. Any chance that your searun cutts are cutbows ?

--
Ken Fortenberry