The effect of different resources of energy allocation on longevity and fecundity of Asobara species

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Asobara species are Braconid larval parasitoids of Drosophila. The genus has a cosmopolitan distribution and can be found in all major climatic zones. Larval feeding and genetic background of different species strongly affects the energy allocation of these parasitoids. Our studies on five species of Asobara, A. tabida, A. citri, A. pleuralis, A. persimilis and A. japonica show significant variation on lipid resources and egg mass(egg load & egg size) of these parasitoids at emergence from the host's puparium. The parasitoids can either allocate resources to reproduction or to the maintenance of its own body. The best strategy of allocation depends on, climatic conditions and the spatial and temporal distribution of hosts in their country of origin. Our hypothesis is that different sources of energy, lipids, glycogen and sugars may play a different role in the trade-off between longevity and fecundity of the parasitoids. To study the allocation of these resources to reproduction and longevity we plan to do a series of experiments with these five species to measure energy reserves and egg loads in the course of their adult lives. These measurements will be done for a group of 30 wasps reared under the same conditions at different times after emergence: directly after emerging, after five days, 10 days, and 15 days of adult age and at the time of dead. The energy reserve will be measured by colorimetric methods and egg loads will be recorded by photography of dissected ovariols.

 

Supervision: Majeed Askari Seyahooei & Jacques van Alphen

Contact: m.a.seyahooei@biology.leidenuniv.nl                  

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This page contains a single entry by administrator published on April 27, 2008 1:50 PM.

Competition for hosts by Asobara pleuralis was the previous entry in this blog.

The cost of metabolic rate on the longevity and fecundity of Leptopilina boulardi is the next entry in this blog.

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