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Background and Environment Affect Phenotype02:27

Background and Environment Affect Phenotype

Although the genetic makeup of an organism plays a major role in determining the phenotype, there are also several environmental factors, such as temperature, oxygen availability, presence of mutagens, that can alter an organism’s phenotype.
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  3. The Effects Of Diet And Semiochemical Exposure On Male Bactrocera Dorsalis (hendel) (diptera: Tephritidae) Metabolic Rate At A Range Of Temperatures.
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  3. The Effects Of Diet And Semiochemical Exposure On Male Bactrocera Dorsalis (hendel) (diptera: Tephritidae) Metabolic Rate At A Range Of Temperatures.

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The effects of diet and semiochemical exposure on male Bactrocera dorsalis (Hendel) (Diptera: Tephritidae) metabolic

Dylan C Dacre1, Frances D Duncan2, Christopher W Weldon1

  • 1Department of Zoology & Entomology, University of Pretoria, Hatfield 0028, Pretoria, South Africa.

Journal of Insect Physiology
|October 26, 2024

View abstract on PubMed

Summary
This summary is machine-generated.

Sterilizing male oriental fruit flies (Bactrocera dorsalis) impacts their metabolism less at higher temperatures. Nutritional and semiochemical treatments can alter metabolic rates, offering insights for pest control strategies.

Keywords:
Methyl eugenolOriental fruit flyRespirometryYeast hydrolysate

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Area of Science:

  • Entomology
  • Pest Management
  • Insect Physiology

Background:

  • The oriental fruit fly (Bactrocera dorsalis) is an invasive pest threatening African agriculture.
  • The sterile insect technique (SIT) is a promising method for controlling B. dorsalis populations.
  • Pre-release treatments for sterile males may enhance their competitiveness in SIT programs.

Purpose of the Study:

  • To investigate the effects of sterilization, protein-rich diets, and semiochemicals on male B. dorsalis resting metabolic rate (RMR).
  • To determine how temperature influences these effects on RMR.
  • To assess the impact of exposure duration to semiochemicals on RMR.

Main Methods:

  • Male B. dorsalis were subjected to sterilization, fed protein-rich diets (yeast hydrolysate), or exposed to semiochemicals (methyl eugenol, eugenol).
  • Resting metabolic rate (RMR) was measured using flow-through respirometry across a temperature range of 15-30°C.
  • Duration of semiochemical exposure (1-4 days) was also evaluated.

    • Main Results:

    • Sterilization's negative impact on RMR diminished with increasing temperature.
    • Protein-rich diets increased average RMR, with the difference between dietary groups decreasing at higher temperatures.
    • Semiochemical feeding reduced average RMR, and this difference widened with increasing temperature.

    Conclusions:

    • Temperature significantly modulates the metabolic response of male B. dorsalis to sterilization and dietary treatments.
    • Protein-rich diets and semiochemicals alter RMR, suggesting potential for optimizing sterile male competitiveness.
    • Duration of semiochemical exposure did not significantly affect RMR in this study.