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You are here: Home / Associated publications / Belgian Journal of Zoology / Bibliographic References / Morphological and physiological differences between mummy colour morphs of Aphidius rhopalosiphi (Hymenoptera Braconidae): an adaptation to overwintering?

MA Legrand, P Vernon, L Krespi and T Hance (2004)

Morphological and physiological differences between mummy colour morphs of Aphidius rhopalosiphi (Hymenoptera Braconidae): an adaptation to overwintering?

BELGIAN JOURNAL OF ZOOLOGY, 134(S1):9-13.

Colours of individuals are one of the more current morphological clues linked to overwintering adaptations. We studied morphological and physiological differences between colour morphs of Aphidius rhopalosiphi mummies in relation to possible adaptation to winter survival. Aphids Sitobion avenae were parasitised and placed in a controlled temperature room at 10degreesC, under a photoperiod of L9:D15. Mummies were sorted by colour. Volume, fresh mass, water content, development time and cocoon thickness were recorded individually. Differences in development time were observed between dark and white forms, cocoon thickness and water content. We could not relate these difference to diapause status. However, these features are very likely linked to distinct cold resistance patterns and may be indications of a quiescence state.

Aphidius rhopalosiphi; morph colour; water content; development time; cocoon thickness; diapause; quiescence; cold resistance
9th Benelux Congress of Zoology, Antwerp, BELGIUM, NOV 08-09, 2002
BJZ

ISSN 2295-0451 (online version)
ISSN 0777-6279 (printed version)
impact factor 2015: 0,87.

Editor-in-Chief:
Prof. Dr. Isa Schön
Royal Belgian Institute of Natural Sciences
Vautierstraat 29
1000 Brussels, Belgium

 



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