The cost of metabolic rate on the longevity and fecundity of Leptopilina boulardi

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Leptopilina boulardi is a Drosophila parasitic wasp originating from Africa, which can now be found in many subtropical and Mediterranean regions as a parasitoid of Drosophila melanogaster. We collect 10 populations of this parasitoid from five different climatic zone in Iran. We culture these lines in our lab since their collection in the summer of 2006. We have measured a number of life history traits of these lines, which show significant variation between lines from different climatic zones. We want to investigate the hypothesis that the observed differences in longevity and metabolic rate for these lines are adaptations to the local climate. Several lines originated from the Caspian coast with a very wet and mild climate, while others originate from the hot and dry desert and Mediterranean climates found in the interior of Iran. Coastal and interior collection sites differ enormously in rainfall and seasonal temperatures.
To study if metabolic rate is an adaptation to local climateto and to study how metabolic rate affects the trade-off between longevity and fecundity we will measure longevity of different lines at a constant temperature and measuring the metabolic rate of individuals in a group of 20 wasps with a sensitive respirometer at different ages of the wasps, at time of emerging, 5, 10, 15 and 20 days after emerging. The egg loads of the wasps will be measured at the time of dead.
Longevity of the wasp will be measured in the presence of food and without food and egg load of the wasps will be measured at the time of death when the body is still fresh by dissection of the ovarioles and by counting the eggs on photographs of dissected ovarioles.

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 1:53 PM.

The effect of different resources of energy allocation on longevity and fecundity of Asobara species was the previous entry in this blog.

Life-history trade-offs between developmental time, longevity and fecundity is the next entry in this blog.

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