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I suspect that there may be some truth to the concern that counting methods have changed.  I haven’t looked into it lately, but it is true that new technologies and new methods of estimating populations are constantly appearing.

Still, my guess is that the broad range of estimate means that the bulk of the population is estimated using low precision methods.  And that probably means the estimating methodology hasn’t changed much.  And, I’d be surprised to find that fairly obvious issue hadn’t been taken into account.

I’ve thought the same as you about CWD and other wildlife diseases.  If there were more predators, wouldn’t there be less disease?  My guess is that the reintroduction of large predators in the northern and western states is going to have some benefits along that line.  It’s raising other problems – like when is the reintroduction “too successful”, but that’s another issue.

David

Message Thread:

• State's wolf populations double - even with contro David Johnson Mar 07 2006
  • happy medium northway Mar 08 2006
    • I'm for lower taxes! twodux Mar 09 2006
      • Not maximum abundance! David Johnson Mar 10 2006
  • I vote for wildlife abundance David Johnson Mar 08 2006
    • Rebuttal to rebuttal ... and a new slogan David Johnson Mar 09 2006
      • Just a note on "ecosystem diversity" bushrat Mar 09 2006
        • About black spruce David Johnson Mar 10 2006
          • David, we agree for the most part bushrat Mar 10 2006
            • Master card martentrapper Mar 10 2006
    • Rebuttal to "wildlife abundance" catchphrase bushrat Mar 08 2006
      • Way to go................ martentrapper Mar 08 2006
    • Predator conrol, etc bwake Mar 08 2006
  • David---let's use common sense facts bushrat Mar 07 2006
    • a few more thoughts twodux Mar 08 2006
      • Yes and yes David Johnson Mar 09 2006
  • Challenge for David and Mark! Michael Strahan Mar 07 2006
    • Me, too David Johnson Mar 08 2006
    • well... bushrat Mar 07 2006
  • What's needed for growth? gogoalie Mar 07 2006
  • as well... gogoalie Mar 07 2006
    • On the fence on this one 375ultramag Mar 07 2006
      • control BRWNBR Mar 07 2006
        • Credit David Johnson Mar 07 2006
        • my take twodux Mar 07 2006
  • Naturally... gogoalie Mar 07 2006