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Related Concept Videos

Frequency-dependent Selection01:21

Frequency-dependent Selection

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When the fitness of a trait is influenced by how common it is (i.e., its frequency) relative to different traits within a population, this is referred to as frequency-dependent selection. Frequency-dependent selection may occur between species or within a single species. This type of selection can either be positive—with more common phenotypes having higher fitness—or negative, with rarer phenotypes conferring increased fitness.
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Evaluating the Effect of Pesticides on the Larvae of the Solitary Bees
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Honey Bees (Hymenoptera: Apidae) Decrease Foraging But Not Recruitment After Neonicotinoid Exposure.

Bradley D Ohlinger1, Roger Schürch1, Sharif Durzi1,2

  • 1Department of Entomology, Virginia Tech, 216 Price Hall, 170 Drillfield Drive, Blacksburg, VA 24061, USA.

Journal of Insect Science (Online)
|February 9, 2022
PubMed
Summary
This summary is machine-generated.

Neonicotinoids like imidacloprid reduce honey bee foraging and persistence. This pesticide exposure may harm bee colonies by decreasing food intake and foraging efficiency.

Keywords:
communicationforagingimidaclopridneonicotinoidwaggle dance

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Area of Science:

  • Entomology
  • Ecotoxicology
  • Behavioral Ecology

Background:

  • Honey bees are vital commercial pollinators.
  • Neonicotinoids are common pesticides in agricultural and urban landscapes.
  • Sublethal neonicotinoid doses cause adverse behavioral and cognitive effects in honey bees.

Purpose of the Study:

  • To investigate the effects of imidacloprid on honey bee foraging and recruitment in a semifield setting.
  • To assess behavioral responses of freely flying bees to field-realistic concentrations of imidacloprid.

Main Methods:

  • A feeder experiment was conducted with freely flying honey bees.
  • Bees were exposed to a control sucrose solution or a treatment solution containing imidacloprid (IMD).
  • Foraging frequency, persistence, and recruitment behaviors (dance frequency and propensity) were measured.

Main Results:

  • Imidacloprid-treated honey bees foraged less frequently (-28%) and persistently (-66%) compared to controls.
  • Recruitment behaviors, including dance frequency and propensity, showed non-significant decreases in IMD-treated bees.
  • These findings indicate a reduction in foraging activity due to imidacloprid exposure.

Conclusions:

  • Sublethal imidacloprid exposure significantly inhibits honey bee foraging behavior.
  • Reduced foraging and persistence may lead to decreased food intake and negatively impact honey bee colony health.
  • Further research is needed to understand the full ecological implications of neonicotinoid exposure on pollinators.