Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 340052
Title Influence of adult nutrition on the relationship between body size and reproductive parameters in a parasitoid wasp
Author(s) Bezemer, T.M.; Harvey, J.A.; Mills, N.J.
Source Ecological Entomology 30 (2005)5. - ISSN 0307-6946 - p. 571 - 580.
Department(s) Laboratory of Nematology
Plant Ecology and Nature Conservation
Laboratory of Entomology
Publication type Refereed Article in a scientific journal
Publication year 2005
Keyword(s) clutch size - egg-production - bracon-hebetor - host - fitness - hymenoptera - life - field - age - oviposition
Abstract 1. An important constraint upon life-history evolution in parasitoids is the limit imposed by body size on allocation of limited metabolic resources to different fitness-related physiological functions such as reproduction and survival. 2. The influence of adult nutrition on reproductive and maintenance variables was studied in the synovigenic ectoparasitoid Mastrus ridibundus, and it was determined whether resource allocation to these different functions depends on body size. 3. Over the course of adult life there was a positive relationship between body size and the number of mature eggs in adult females both in the presence and absence of food. However, only in the presence of food did egg maturation rates increase significantly with body size. Starved wasps produced significantly smaller eggs than fed ones, which has not been documented before. Moreover, starved wasps produced fewer offspring than fed wasps, and attacked fewer hosts. 4. The availability of food had a major effect on longevity, with fed females living about 10 times longer than starved ones. There was also a positive relationship between body size and longevity. In starved wasps, this relationship was the same both in the presence and absence of hosts, but in fed wasps there was a positive relationship between body size and longevity in the absence of hosts only. Allocation to initial eggs relative to lifetime progeny production did not decline with body size. 5. The data reveal that in M. ridibundus the trade-off between maintenance and reproduction varies with life expectancy
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