Saturday     July 4, 1998    11:37 PM
 
Dear Paul,
 
I think that the answer is : no. Or perhaps they can live only 
a brief time. The different food they may found in shallow
water than in deep water is not the problem.
As you surely know the Olives prefer live food but they are
also carrion and deposit feeder. So that they are not highly
specialized feeder.
The real problem is the different  temperature and salinity
between shallow and deep water.
Offshore the water's temperature is quite constant from 25
to 200m depth (the wind plays an important part). But
near the coast the temperature quickly decrease while the
depth increase.
The temperature is very important because it's linked to the
salinity. If the water's temperature decrease the solubility's
product decrease. This mean a less quantity of salt dissolved.
And this mean that also the osmotic pressure decrease.
I think that the different osmotic pressure between shallow
and deep water is the main reason because a deep specie
can't live in shallow water and vice versa.
The correct value of the osmotic pressure is especially viable
to all the animals and plants the which life is linked to water. 
All above is clear if you consider that the Olives are both
stenothermal and stenohaline.  
The water's temperature influences also the oxygen's
concentration. More is low the temperature - in deep water -
and more high is the oxygen's concentration.
 
Ciao!
 
Maurizio,
mad keen on Olives!!
 
-----Messaggio originale-----
Da:     Paul R. Monfils [SMTP:[log in to unmask]]
Inviato:        venerdì 3 luglio 1998 20.52
A:      [log in to unmask]
Oggetto:        Re: Sand pumped ashore
 
I recall quite a few years back, a fellow in Natal was getting a lot of shells
from a beach reclamation project.  They were pumping sand from an offshore
area onto the beach, and the offshore sand-swelling mollusks were coming onto
the beach too, apparently by the thousands  I recall he got some species by
the hundreds, which were listed as uncommon at that time.  He sent me a
hundred Oliva caroliniana, saying he had a couple of thousand of them, all
gem, and all collected either alive or fresh dead, right on the beach.  Always
wondered what would have happened if he had returned some of these to the
ocean - it wound mean returning deep water species to a shallow subtidal
habitat.  Would they have survived?  Found their way back into deeper water?
Any ideas on this?
 
Paul M.