07-02-2010, 04:17 AM
[quote mike4cobra]Yeah yeah yeah. Im opening myself up to all kinds of forum bash with out a link for proof, but, take it for what its worth. I just consider you the same kind of people that say I didnt catch any fish unless I post pictures[crazy]. Actually there are some links on here supporting what i said, just depend on how you read them. The information I aquired was from WalleyeCentral.com about 7or 8 months ago. They had compiled a bunch of University and DNR studies about the walleye genetics, was quite an interesting read. But once again, no link, so bash away.[/quote]
Okay. Help me out here. You say you read where walleyes are adapting, even genetically changing, at a very accelerated rate. Yet you can't remember where you got your information. I've cited two web site addresses that have information about walleye genetics. Here is a quote from one master's thesis that says the genetic differences between the identified variations in walleyes was caused by separation, caused by glaciation during the Pleistocene era. That's the last ice age. It does not suggest that the various genetic differences are recent developments. Which is it? Are they genetically mutating in a few generations, or did they develop unique characteristics based on separations that happened from 2.5 million years ago, up to about 12,000 years ago?
Okay. Help me out here. You say you read where walleyes are adapting, even genetically changing, at a very accelerated rate. Yet you can't remember where you got your information. I've cited two web site addresses that have information about walleye genetics. Here is a quote from one master's thesis that says the genetic differences between the identified variations in walleyes was caused by separation, caused by glaciation during the Pleistocene era. That's the last ice age. It does not suggest that the various genetic differences are recent developments. Which is it? Are they genetically mutating in a few generations, or did they develop unique characteristics based on separations that happened from 2.5 million years ago, up to about 12,000 years ago?
Quote:Glaciation during the Pleistocene played a primary role in shaping this genetic structure. The four glacial advances of the Pleistocene, beginning about one million years ago (Hocutt et al., 1986) altered much of the northern Mississippi basin, impounding and rerouting many tributaries, and forcing walleye inhabiting these areas into refugia to the south and east where the subsequently diverged due to genetic drift and bottlenecks (Billington 1996). After the glaciers receded, a mixing of the walleye populations from the refugia occurred within the Mississippi Basin. The receding glaciers also created the Great Lakes, which were also populated with these walleye populations.[signature]
Analysis of intraspecific mtDNA RFLP haplotypes has shown walleye from the Great Lakes to group into four distinct populations consistent with three Pleistocene refugia (Mississippi River, Missouri River, and Atlantic) with a fourth divergent southern population unaffected by the glacial advances (Figure 4) (Billington et al. 1992; Billington 1996). A fifth group of walleye was identified from the Ohio, Kentucky and Tennessee River Basins possessing various haplotypes consistent with the prevalent stocking of these areas with fish from the Great Lakes. This group also included a few individuals possessing divergent haplotypes thought to be remnants of the original walleye population in this region prior to stocking and possibly native to their respective locations (Billington 1996).