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#1
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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. |
#2
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![]() 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 |
#3
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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 |
#4
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![]() 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 |
#5
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![]() "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 |
#6
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![]() 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 |
#7
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![]() "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 |
#8
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![]() "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 |
#9
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![]() "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 |
#10
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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 |
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