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 > ---------------------------------------------------------------------- [log in to unmask] - a forum for informal discussions on molluscs To leave this list, click on the following web link: http://listserv.uga.edu/cgi-bin/wa?SUBED1=conch-l&A=1 Type your email address and name in the appropriate box and click leave the list. ----------------------------------------------------------------------