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<DIV>Hi Frank,</DIV>
<DIV> </DIV>
<DIV>Only negatively influenced? </DIV>
<DIV>Do you have any more specific information?</DIV>
<DIV> </DIV>
<DIV>Fr. greetings, </DIV>
<DIV>André van Eck</DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV style="FONT: 10pt arial">----- Original Message -----
<DIV style="BACKGROUND: #e4e4e4; font-color: black"><B>From:</B> <A
title=frank.dziock@tu-berlin.de href="mailto:frank.dziock@tu-berlin.de">Frank
Dziock</A> </DIV>
<DIV><B>To:</B> <A title=syrphidae@nottingham.ac.uk
href="mailto:syrphidae@nottingham.ac.uk">Hoverfly discussion list</A> </DIV>
<DIV><B>Sent:</B> Tuesday, November 20, 2007 2:51 PM</DIV>
<DIV><B>Subject:</B> [Syrphidae] frost tolerance pupae Cheilosia
Syrphidae</DIV></DIV>
<DIV><BR></DIV>-----BEGIN PGP SIGNED MESSAGE-----<BR>Hash: SHA1<BR><BR><BR>Dear
Syrphid friends!<BR><BR>in an analysis of a European hoverfly data set we
recognized that<BR>especially the group of phytophagous species seems to be
negatively<BR>influenced by mean annual temperatures. One explanation could be
that<BR>Cheilosia overwinters as a pupa which might be potentially
more<BR>sensitive to freezing in Winter than species overwintering as a
larva.<BR><BR>Are there any references concerning winter/frost hardiness of
Syrphid<BR>species overwintering as a pupa? (I know of the work by Hart et
al.<BR>concerning Syrphus ribesii (larval overwinterer) and Episyrphus
and<BR>Hondelmann for Episyrphus (adult overwinterer))<BR><BR>I would be very
glad to receive any hints.<BR><BR>Best wishes from cold
Berlin,<BR><BR>Frank<BR><BR><BR><BR><BR><BR>- --<BR><BR>Prof. Dr. Frank
Dziock<BR>Animal Ecologist and Head of Department
(Juniorprofessor)<BR><BR>Department of Biodiversity Dynamics<BR>Technische
Universitaet Berlin<BR>Sekr. AB 1<BR>Rothenburgstr. 12<BR>D - 12165
Berlin<BR>Germany<BR><BR>Tel: 030 – 314 71368<BR><BR>Secretary Gisela Falk<BR><A
href="mailto:gisela.falk@tu-berlin.de">gisela.falk@tu-berlin.de</A><BR>Tel: 030
- 314 71350<BR>Fax: 030 – 314 71355<BR><BR><A
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