Monarchs and Monoculture in southern Michigan
Patrick Foley
patfoley at csus.edu
Fri Aug 26 11:59:42 EDT 2005
Paul,
Do you understand the concept of sources and sinks?
Pulliam, H. R. 1996. Sources and sinks: empirical evidence and
population consequences. pp. 45-69, In Population Dynamics in Ecological
Space and Time. O. E. Rhodes, Jr. R. K. Chesser, and M.H. Smith,
Editors. The University of Chicago Press, Chicago, Ill.
And as always, it is worth remembering that hundreds, if not thousands
of much more vulnerable lepidoptera live in the Midwest, almost none of
them as weedy, opportunistic and vagile as Monarchs.
Patrick
patfoley at csus.edu
Paul Cherubini wrote:
>Ed wrote:
>
>
>
>>1998 1999 2000 2001 2002 2003 2004
>>E - 44 E - 164 E - 37 E - 974 E - 87 E - 854 E - 70
>>A - 5 A - 34 A - 3 A - 84 A - 8 A - 131 A - 1
>>
>>
>
>Ratio Midwest vs. Atlantic coast state tag recoveries:
>
>1998: 8.8 to 1
>1999: 4.8 to 1
>2000: 12.3 to 1
>2001 11.6 to 1
>2002 10.8 to 1
>2003 6.5 to 1
>2004 70.0 to 1
>
>Everyone can see at a glance there was no fundamental change
>in the Midwest vs. Atlantic coast state tag recovery ratios after
>2001 as compared to before 2001. 2001 was approx. the year
>when transgenic corn and soybeans.had become the dominant
>crops grown in the upper Midwest.
>
>Paul Cherubini
>El Dorado, Calif.
>
>
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