skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Dispersion of fruit flies (Diptera: Tephritidae) at high and low densities and consequences of mismatching dispersions of wild and sterile flies

Abstract

Both wild and released (sterile) Bactrocera tryoni (Froggatt) (Diptera: Tephritidae) and wild Bactrocera papayae (Drew and Hancock) in Australia had patchy distributions and comparisons with predictions of the negative binomial model indicated that the degree of clumping was sometimes very high, particularly at low densities during eradication. An increase of mean recapture rate of sterile B. tryoni on either of 2 trap arrays was not accompanied by a reduction in its coefficient of variation and when recapture rates were high, the percentage of traps catching zero decreased only slightly with increase in recapture rate, indicating that it is not practicable to decrease the heterogeneity of dispersion of sterile flies by increasing the number released. There was often a mismatch between the dispersion patterns of the wild and sterile flies, and the implications of this for the efficiency of the sterile insect technique (SIT) were investigated with a simulation study with the observed degrees of mismatch obtained from the monitoring data and assuming the overall ratio of sterile to wild flies to be 100:1. The simulation indicated that mismatches could result in the imposed rate of increase of wild flies being up to 3.5 times higher than that intended (i.e., 0.35more » instead of 0.1). The effect of a mismatch always reduces the efficiency of SIT. The reason for this asymmetry is discussed and a comparison made with host-parasitoid and other systems. A release strategy to counter this effect is suggested. (author) [Spanish] Las moscas naturales y liberadas (esteriles) de Bactrocera tryoni (Froggatt) (Diptera: Tephritidae) y Bactrocera papayae (Drew and Hancock) en Australia tuvieron distribuciones en parches y sus compariciones con las predicciones de un modelo binomial negativo indicaron un nivel de agregacion a veces fue muy alto, particularmente en las densidades bajas durante de eradicacion. Un aumento en el promedio de la tasa de B. tryoni esteriles recapturadas en las dos formas de trampas no fue acompanado por una reduccion en su coeficiente de variacion y cuando las tasas de moscas recapturadas fue alto, el porcentaje de las trampas que capturaron ninguna mosca bajo solo un poco con un aumento en la tasa de las moscas recapturadas, esto indico que no es practicable bajar la heterogenicidad de dispersion de las moscas esteriles por medio de un aumento el numero de moscas liberadas. Muy a menudo se encontro un desajusto entre los patrones de dispersion de las moscas naturales y esteriles, y las implicaciones de esto para la eficiencia de la tecnica del insecto esteril (TIE) fueron investigadas en un estudio de simulacion con los grados de desajustes observados obtenidos de los datos del monitoreo y se considero que la razon general del numero de moscas esteriles a moscas naturales fueron 100:1. La simulacion indico que los desajustes en los patrones de dispersion pueden resultar en una tasa impuesta sobre el aumento de las moscas naturales de hasta 3.5 veces mas alta que la tasa intentada (i.e., 0.35 en vez de 0.1). El efecto de un desajuste siempre reduce la eficiencia de TIS. Se discute la razon para esta asimetria y una comparicion hecha con el sistema de hospedero-parasitoid y otros sistemas. Se sugiere una estrategia de liberacion para contrarrestar este efecto. (author)« less

Authors:
 [1]
  1. Fruit Fly Research Centre, School of Biological Sciences, University of Sydney A08, NSW 2006 (Australia)
Publication Date:
OSTI Identifier:
20942920
Resource Type:
Journal Article
Resource Relation:
Journal Name: Florida Entomologist; Journal Volume: 90; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); DOI: 10.1653/0015-4040(2007)90[136:DOFFDT]2.0.CO;2; Proceedings of a 5-year FAO/IAEA Coordinated Research Project on Fruit Fly Quality, Control, and Behavior; 38 refs, 5 figs, 1 tab
Country of Publication:
United States
Language:
English
Subject:
60 APPLIED LIFE SCIENCES; EFFICIENCY; FORECASTING; FRUIT FLIES; INSECT DISPERSAL; MASS REARING; SIMULATION; STERILE MALE TECHNIQUE

Citation Formats

Meats, A. Dispersion of fruit flies (Diptera: Tephritidae) at high and low densities and consequences of mismatching dispersions of wild and sterile flies. United States: N. p., 2007. Web. doi:10.1653/0015-4040(2007)90[136:DOFFDT]2.0.CO;2; PROCEEDINGS OF A 5-YEAR FAO/IAEA COORDINATED RESEARCH PROJECT ON FRUIT FLY QUALITY, CONTROL, AND BEHAVIOR; 38 REFS, 5 FIGS, 1 TAB.
Meats, A. Dispersion of fruit flies (Diptera: Tephritidae) at high and low densities and consequences of mismatching dispersions of wild and sterile flies. United States. doi:10.1653/0015-4040(2007)90[136:DOFFDT]2.0.CO;2; PROCEEDINGS OF A 5-YEAR FAO/IAEA COORDINATED RESEARCH PROJECT ON FRUIT FLY QUALITY, CONTROL, AND BEHAVIOR; 38 REFS, 5 FIGS, 1 TAB.
Meats, A. Thu . "Dispersion of fruit flies (Diptera: Tephritidae) at high and low densities and consequences of mismatching dispersions of wild and sterile flies". United States. doi:10.1653/0015-4040(2007)90[136:DOFFDT]2.0.CO;2; PROCEEDINGS OF A 5-YEAR FAO/IAEA COORDINATED RESEARCH PROJECT ON FRUIT FLY QUALITY, CONTROL, AND BEHAVIOR; 38 REFS, 5 FIGS, 1 TAB.
@article{osti_20942920,
title = {Dispersion of fruit flies (Diptera: Tephritidae) at high and low densities and consequences of mismatching dispersions of wild and sterile flies},
author = {Meats, A.},
abstractNote = {Both wild and released (sterile) Bactrocera tryoni (Froggatt) (Diptera: Tephritidae) and wild Bactrocera papayae (Drew and Hancock) in Australia had patchy distributions and comparisons with predictions of the negative binomial model indicated that the degree of clumping was sometimes very high, particularly at low densities during eradication. An increase of mean recapture rate of sterile B. tryoni on either of 2 trap arrays was not accompanied by a reduction in its coefficient of variation and when recapture rates were high, the percentage of traps catching zero decreased only slightly with increase in recapture rate, indicating that it is not practicable to decrease the heterogeneity of dispersion of sterile flies by increasing the number released. There was often a mismatch between the dispersion patterns of the wild and sterile flies, and the implications of this for the efficiency of the sterile insect technique (SIT) were investigated with a simulation study with the observed degrees of mismatch obtained from the monitoring data and assuming the overall ratio of sterile to wild flies to be 100:1. The simulation indicated that mismatches could result in the imposed rate of increase of wild flies being up to 3.5 times higher than that intended (i.e., 0.35 instead of 0.1). The effect of a mismatch always reduces the efficiency of SIT. The reason for this asymmetry is discussed and a comparison made with host-parasitoid and other systems. A release strategy to counter this effect is suggested. (author) [Spanish] Las moscas naturales y liberadas (esteriles) de Bactrocera tryoni (Froggatt) (Diptera: Tephritidae) y Bactrocera papayae (Drew and Hancock) en Australia tuvieron distribuciones en parches y sus compariciones con las predicciones de un modelo binomial negativo indicaron un nivel de agregacion a veces fue muy alto, particularmente en las densidades bajas durante de eradicacion. Un aumento en el promedio de la tasa de B. tryoni esteriles recapturadas en las dos formas de trampas no fue acompanado por una reduccion en su coeficiente de variacion y cuando las tasas de moscas recapturadas fue alto, el porcentaje de las trampas que capturaron ninguna mosca bajo solo un poco con un aumento en la tasa de las moscas recapturadas, esto indico que no es practicable bajar la heterogenicidad de dispersion de las moscas esteriles por medio de un aumento el numero de moscas liberadas. Muy a menudo se encontro un desajusto entre los patrones de dispersion de las moscas naturales y esteriles, y las implicaciones de esto para la eficiencia de la tecnica del insecto esteril (TIE) fueron investigadas en un estudio de simulacion con los grados de desajustes observados obtenidos de los datos del monitoreo y se considero que la razon general del numero de moscas esteriles a moscas naturales fueron 100:1. La simulacion indico que los desajustes en los patrones de dispersion pueden resultar en una tasa impuesta sobre el aumento de las moscas naturales de hasta 3.5 veces mas alta que la tasa intentada (i.e., 0.35 en vez de 0.1). El efecto de un desajuste siempre reduce la eficiencia de TIS. Se discute la razon para esta asimetria y una comparicion hecha con el sistema de hospedero-parasitoid y otros sistemas. Se sugiere una estrategia de liberacion para contrarrestar este efecto. (author)},
doi = {10.1653/0015-4040(2007)90[136:DOFFDT]2.0.CO;2; PROCEEDINGS OF A 5-YEAR FAO/IAEA COORDINATED RESEARCH PROJECT ON FRUIT FLY QUALITY, CONTROL, AND BEHAVIOR; 38 REFS, 5 FIGS, 1 TAB},
journal = {Florida Entomologist},
number = 1,
volume = 90,
place = {United States},
year = {Thu Mar 15 00:00:00 EDT 2007},
month = {Thu Mar 15 00:00:00 EDT 2007}
}