Interesting.  The topic of dredging and such -  The beautiful beach sand
(white) in Hawaii - e.g.
Waikiki  - and perhaps some old and dead shells found - the sand
continues to come from the
Santa Cruz mountains south west of San Jose and South of San Francisco.
The sand is very
pure and white.  Used in glass and Kaiser first imported boat loads for
the beach.  In the sand
and the water cuts here and there - outside Scotts Valley are Sea
Shells.  The sand was once
beach but not elevated hundreds of feet up due to the uplifts.   So some
Hawaii finds might
be very old west coast shells.

Martin

Robert Lipe wrote:
> I've studied the Donax in the field for many years.  I used to collect
> a gallon or so to feed my shells and fish in my aquarium.  In the late
> summer they grew to full adult at Fort Desoto.  The beaches weren't
> dredged and filled as much like the rest of the beaches.  They used to
> have their cycles at somewhat different times on different beaches
> until they started pumping in sand in the last 10 years or more.
> Where were these studies done?  It could be different in captivity.
> Phil Poland was with me when we discovered the 2 year D. variabilis.
> If you could reach Phil, maybe he could give you some answers.  You
> know Bay scallops live one year, but at times you can find
> some scallops going on their second year when shelling in the winter.
>
> Bob
>
>
> Robert Lipe Specimens
> www.theshellstore.com <http://www.theshellstore.com/>
> 348 Corey Ave
> St. Pete Beach, Fl 33706

--
Martin H. Eastburn
@ home at Lions' Lair with our computer lionslair at consolidated dot net
TSRA, Life; NRA LOH & Patron Member, Golden Eagle, Patriot's Medal.
NRA Second Amendment Task Force Charter Founder
IHMSA and NRA Metallic Silhouette maker & member.
http://lufkinced.com/

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