Thanks for posting this.
This is a subject of interest to me.
The tiny Vertigo pygmaea survived -16 C in my backyard, the lowest
temperature I have so far measured (in MD).

Incidentally, the entire run of the Veliger is now available at BHL.

http://www.biodiversitylibrary.org/bibliography/66841#/summary

Who needs paper copies anymore? :)

Aydin Orstan


On Fri, 14 Feb 2014 08:36:11 -0500, Harry Lee <[log in to unmask]> wrote:

>Listers:
>
>I found the following abstract from the title cited below [The
>Veliger 40(1): 67-70] on-line:
>
>Seventy-four specimens from four genera of native gastropods were
>cooled from 2.0 degree C to -3.3 degree C over a 3 hour period under
>laboratory conditions. The taxa examined included two terrestrial
>pulmonates (Anguispira alternata and Mesodon inflecta), a pulmonate
>known to occupy both permanent and ephemeral aquatic habitats
>(Physella integra), and an aquatic prosobranch (Pleurocera
>canaliculatum). There was no mortality in the pulmonates, but 39%
>mortality occurred in the prosobranch Pleurocera. Additionally, a
>sample of 43 zebra mussels (Dreissena polymorpha), a non-native but
>recently introduced species, were aerially exposed to the same
>temperature cycle. Of the 43 mussels, 20 had been acclimated to 2
>degree C, and 23 acclimated to 15 degree C. Mortality occurred in
>both treatments (35% mortality in the 15 degree C acclimated and 25%
>in the 2 degree C acclimated) and did not differ significantly
>between the two groups. No mortality occurred among controls.
>
>Harry
>
>
>At 09:41 PM 2/13/2014, David Campbell wrote:
>>John Tucker had trouble getting the list to accept information about
>>a publication on mollusks and freezing:
>>
>>Paukstis, Gary L., Fredric J. Janzen, and John K.
>>Tucker.  1997.  Comparative survivorship of native gastropods
>>(Anguispira, Mesodon, Physella, Pleurocera) and an introduced
>>bivalve (Dreissena) exposed to freezing temperatures.  Veliger 40(1):75-78.
>>
>>Many freshwater species maintain activity under ice.  I don't have a
>>reference to hand, but I think I have seen the claim that
>>Crassostrea occurs more than Ostrea in shallow water due to greater
>>tolerance for subzero temperature.
>>
>>
>>
>>--
>>
>>Dr. David Campbell
>>Assistant Professor, Geology
>>Department of Natural Sciences
>>Box 7270
>>Gardner-Webb University
>>Boiling Springs NC 28017
>

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