Reproduction,adult survival and intrinsic rate of growth ofUrolepis rufipes [Hymenoptera: Pteromalidae], a pupal parasitoid of house flies,Musca domestica |
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Authors: | L Smith D A Rutz |
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Institution: | (1) Department of Entomology, Cornell University, Comstock Hall, 14853 Ithaca, New York, USA |
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Abstract: | Urolepis rufipes Ashmead, a recently discovered parasitoid of house flies at New York dairies, was reared at 15, 20, 25, 30 and 34°C to measure
daily fertility, fecundity and adult survivorship. Little reproduction occurred at 15°C, and only a few ♀ successfully emerged
at 34°C. The intrinsic rate of growth was fastest at 30°C (0.282 ♀/day), but fecundity was highest at 25°C (165.5 hosts attacked,
producing 124.5 progeny). Some reproductive statistics at 25°C were: net reproductive rate (R0=72.1 ♀/♀, generation time =18.7 days, intrinsic rate of increase (rm)=0.228, finite rate of increase (λ)=1.26, daily birth rate =0.302, daily death rate =0.021 and Fisher's reproductive value
=418. Sex ratio (average =75.9%) did not vary significantly with temperature (between 20–30°C) nor with mother's age.
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Keywords: | house fly parasitoid reproduction survivorship intrinsic rate of natural increase |
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