[Syrphidae] frost tolerance pupae Cheilosia Syrphidae
Frank Dziock
frank.dziock at tu-berlin.de
Tue Nov 20 13:51:01 GMT 2007
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Dear Syrphid friends!
in an analysis of a European hoverfly data set we recognized that
especially the group of phytophagous species seems to be negatively
influenced by mean annual temperatures. One explanation could be that
Cheilosia overwinters as a pupa which might be potentially more
sensitive to freezing in Winter than species overwintering as a larva.
Are there any references concerning winter/frost hardiness of Syrphid
species overwintering as a pupa? (I know of the work by Hart et al.
concerning Syrphus ribesii (larval overwinterer) and Episyrphus and
Hondelmann for Episyrphus (adult overwinterer))
I would be very glad to receive any hints.
Best wishes from cold Berlin,
Frank
- --
Prof. Dr. Frank Dziock
Animal Ecologist and Head of Department (Juniorprofessor)
Department of Biodiversity Dynamics
Technische Universitaet Berlin
Sekr. AB 1
Rothenburgstr. 12
D - 12165 Berlin
Germany
Tel: 030 – 314 71368
Secretary Gisela Falk
gisela.falk at tu-berlin.de
Tel: 030 - 314 71350
Fax: 030 – 314 71355
http://www.tu-berlin.de/fb7/ioeb/biodiversitaet/
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