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.
Résumé
L'Urolepis rufipes Ashmead, parasitoïde de la mouche,Musca domestica L, récemment découvert dans les fermes laitières de l'état de New York, aux Etats-Unis, a été élevé à des températures de 15, 20, 25, 30 et 34°C afin de mesurer quotidiennement le taux de fertilité, de fécondité et de survie chez les adultes. On a observé peu d'activité reproductrice ou de développement à 15°C et seules quelques femelles sont arrivées à éclore à 34°C. Le taux de croissance intrinsèque était le plus rapide à 30°C (0,282), mais le taux de fécondité était le plus élevé à 25°C (165,5 hôtes attaqués, produisant une descendance de 124,5). A 25°C le taux net de reproduction (R0)=72,1 femelles/femelle, temps de survie =18,7 jours, taux de croissance intrinsèque (rm)-0,228, taux d'augmentation fini (λ)=1,256, taux quotidien de natalité =0,302, taux quotidien de mortalité =0,021, valeur reproductive de Fischer =417,7. La proportion des sexes (en moyenne 75,9%) n'a varié d'une manière significative ni avec la température (entre 20–30°C), ni avec l'âge de la mère.
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Smith, L., Rutz, D.A. Reproduction, adult survival and intrinsic rate of growth ofUrolepis rufipes [Hymenoptera: Pteromalidae], a pupal parasitoid of house flies,Musca domestica . Entomophaga 32, 315–327 (1987). https://doi.org/10.1007/BF02372440
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DOI: https://doi.org/10.1007/BF02372440