Comparative developmental times and laboratory life tables for Drosophlia suzukii and Drosophila melanogaster (Diptera: Drosophilidae)
Keywords:
intrinsic rate of increase, finite rate of increase, net reproduction rate, mean generation timeAbstract
Drosophila suzukii (Matsumura) (Diptera: Drosophilidae) and Drosophila melanogaster Meigen were studied in a laboratory at 25 °C, 60% RH and 16:8 h L:D. Stage-specific developmental times, reproduction, stage-specific survival rates, and adult sex ratios were recorded and organized in separate life tables for each species. The intrinsic rate of increase (r), the finite rate of increase (λ), the net reproduction rate (R0) and the mean generation time (T) were 0.12 day–1, 1.13 day–1, 27.57 offspring, and 28.04 days, respectively, for D. suzukii and 0.17 day–1, 1.19 day–1, 38.17 offspring, and 21.27 days, respectively, for D. melanogaster. The use of the age-stage, two-sex life table method to study D. suzukii and D. melanogaster yielded considerably more accurate and useful data than would have been obtained by using the female-only age-specific life table. These life tables can be used for population growth projections, designing mass-rearing programs, and for pest management.
Drosophila suzukii (Matsumura) y Drosophila melanogaster Meigen (Diptera: Drosophilidae) fueron estudiados en un laboratorio a 25 ° C, con 60% de humedad relativa y 16:8 h L:O (Luz: Oscuridad). El tiempo de desarrollo, la reproducción, la tasa de sobrevivencia de cada estadio específico, y la proporción de sexos para los adultos fueron registrados y organizados en tablas de vida independientes para cada especie. La tasa intrínseca de crecimiento (r), la tasa finita de crecimiento (λ), la tasa neta de reproducción (R0) y el tiempo medio de generación (T) fueron 0.12 dias–1, 1.13 dias–1, 27.57 progenie y 28.04 días para D. suzukii, respectivamente, y 0.17 dias–1, 1.19 dias–1, 38.17 progenie, y 21.27 días, respectivamente, para D. melanogaster. El uso del método de hacer una tabla de vida segun la edad del estadio y los dos sexos para estudiar D. suzukii y D. melanogaster resultó en datos considerablemente más precisos y útiles de los que se habría obtenido mediante el uso de la tabla de vida de las edades específicas basada sólo en hembras. Estas tablas de vida pueden ser utilizadas para las proyecciones de crecimiento de la población, para el diseño de programas de criar en masa, y para el manejo de plagas.
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