Now only 3 (Monarch larvae)
Bob Parcelles,Jr.
rjparcelles at yahoo.com
Thu Nov 1 02:07:13 EST 2001
Thanks Paul.
That certainly was some interesting data I had been looking for those tables. I
am sure Lincoln Brower is proud of you. :)
Bob Parcelles, Jr.
Pinellas Park, FL
12 species flying today.
--- Paul Cherubini <monarch at saber.net> wrote:
> Ron Gatrelle wrote:
>
> > Last post I noted how we got an A. tuberosa to still be fully leafed this
> > time of year. This leads me to this question. Do southward moving
> > Monarch's not oviposit simply because the suitable hosts are dried up. If
> > green plants are found will they oviposit even though in the migration
> > mode???
>
> Ron, the reproductive state of fall migrant monarchs is not black
> and white. While a majority of Sept/Oct. fall migrants are in reproductive
> diapause and will ignore suitable milkweed plants they encounter en route to
> Mexico, a small percentage of the migrants breaks diapause
> and will lays eggs on any available milkweed. Thus it is
> common to find monarch eggs and caterpillars in the southern states
> in September, October and November.
>
> How small a percentage of the migratory population breaks diapause?
> Well even if it is only 2% out of a population of 100,000,000 butterflies,
> 2,000,000 reproductive butterflies is ALOT of reproductive butterflies.
>
> Some fall migrants also break diapause deep down in Mexico
> and lay eggs on the milkweeds growing in the vicinity of the Mexican
> overwintering sites.
>
> Still another angle on all this is that Mexico is not the sole destination
> of fall migrants. Some move down through Florida and even end
> up in the Bahamas and Caribbean.
>
> http://www.saber.net/~monarch/urquhart1971-81.JPG
> http://www.saber.net/~monarch/MW1996.jpg
> http://www.saber.net/~monarch/urquhart1964-71.JPG
> http://www.saber.net/~monarch/urquhart1982-88.jpg
>
> Paul Cherubini
> Placerville, Calif.
>
>
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=====
Bob Parcelles, Jr
Pinellas Park, FL
rjparcelles at yahoo.com
http://groups.yahoo.com/group/naturepotpourri
http://rainforest.care2.com/welcome?w=976131876
"One touch of nature makes the whole world kin."
--William Shakespeare
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