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Different responses of Drosophila to ELF magnetic field: fitness components & locomotor activity

2016 · Mixed · Low evidence

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MixedLow evidencePaper 1372

Exposure of egg–first instar larvae to a 50 Hz, 0.5 mT ELF magnetic field for 48 h shortened developmental time and did not affect viability or sex ratio. Exposure of one-day-old adults from IF lines B16/1 and B24/4 significantly decreased locomotor activity,…

Study snapshot

Publicationmanual · 2016
Study typeanimal
Reported directionMixed
Evidence ratingLow

Abstract

Different responses of Drosophila to ELF magnetic field: fitness components & locomotor activity Zmejkoski D, Petković B, Pavković-Lučić S, Prolić Z, Anđelković M, Savić T. Different responses of Drosophila subobscura isofemale lines to extremely low frequency magnetic field (50 Hz, 0.5 mT): fitness components and locomotor activity. Int J Radiat Biol. 2016 Dec 6:1-29. Abstract PURPOSE: Extremely low frequency (ELF) magnetic fields as essential ecological factor may induce specific responses in genetically different lines. The subject of this study was to investigate the impact of ELF magnetic field on fitness components and locomotor activity of five Drosophila subobscura isofemale (IF) lines. MATERIALS AND METHODS: Each D. subobscura IF line, arbitrarily named: B16/1, B24/4, B39/1, B57/2 and B69/5, was maintained in five full-sib inbreeding generations. Their genetic structures were defined based on the mitochondrial DNA variability. Egg-first instar larvae and one-day-old flies were exposed to ELF magnetic field (50 Hz, 0.5 mT, 48 h) and thereafter, fitness components and locomotor activity of males and females in an open field test were observed for each selected IF line, respectively. RESULTS: Exposure of egg-first instar larvae to ELF magnetic field shortened developmental time, and did not affect viability and sex ratio of D. subobscura IF lines. Exposure of one-day-old males and females IF lines B16/1 and B24/4 to ELF magnetic field significantly decreased their locomotor activity and this effect lasted longer in females than males. CONCLUSIONS: These results indicate various responses of D. subobscura IF lines to the applied ELF magnetic field depending on their genetic background. tandfonline.com

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AI evidence extraction

Structured fields below were generated from the paper’s abstract and metadata to make the evidence easier to inspect. Automated extraction may be incomplete or incorrect; verify important details against the original paper.

Study typeanimal
Effect directionmixed
PopulationDrosophila subobscura (five isofemale lines; egg–first instar larvae and one-day-old adult flies)
Sample sizeNot supplied
ExposureELF · 48 h
Evidence strengthLowConfidence: 78% · Peer reviewed: yes

Main findings

Exposure of egg–first instar larvae to a 50 Hz, 0.5 mT ELF magnetic field for 48 h shortened developmental time and did not affect viability or sex ratio. Exposure of one-day-old adults from IF lines B16/1 and B24/4 significantly decreased locomotor activity, with the effect lasting longer in females than in males.

Outcomes measured

  • developmental time
  • viability
  • sex ratio
  • locomotor activity (open field test)

Limitations

  • Sample size not reported in abstract.
  • Only five isofemale lines studied; effects differed by genetic background.
  • Locomotor activity effect reported only for two lines (B16/1 and B24/4).
  • Exposure conditions limited to a single frequency (50 Hz), flux density (0.5 mT), and duration (48 h).
View raw extracted JSON
{
  "study_type": "animal",
  "exposure": {
    "band": "ELF",
    "source": null,
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": "48 h"
  },
  "population": "Drosophila subobscura (five isofemale lines; egg–first instar larvae and one-day-old adult flies)",
  "sample_size": null,
  "outcomes": [
    "developmental time",
    "viability",
    "sex ratio",
    "locomotor activity (open field test)"
  ],
  "main_findings": "Exposure of egg–first instar larvae to a 50 Hz, 0.5 mT ELF magnetic field for 48 h shortened developmental time and did not affect viability or sex ratio. Exposure of one-day-old adults from IF lines B16/1 and B24/4 significantly decreased locomotor activity, with the effect lasting longer in females than in males.",
  "effect_direction": "mixed",
  "limitations": [
    "Sample size not reported in abstract.",
    "Only five isofemale lines studied; effects differed by genetic background.",
    "Locomotor activity effect reported only for two lines (B16/1 and B24/4).",
    "Exposure conditions limited to a single frequency (50 Hz), flux density (0.5 mT), and duration (48 h)."
  ],
  "evidence_strength": "low",
  "confidence": 0.78,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "extremely low frequency",
    "ELF magnetic field",
    "50 Hz",
    "0.5 mT",
    "Drosophila subobscura",
    "isofemale lines",
    "fitness components",
    "developmental time",
    "viability",
    "sex ratio",
    "locomotor activity",
    "open field test",
    "genetic background"
  ],
  "suggested_hubs": [
    {
      "slug": "elf-occupational-exposure",
      "weight": 0.35,
      "reason": "Study involves ELF (50 Hz) magnetic field exposure, relevant to ELF exposure research."
    }
  ]
}
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AI-extracted fields are generated from the abstract and metadata and may be incomplete or incorrect. This material is for informational purposes and is not medical advice.

Identifiers and source

DOI: 10.1080/09553002.2017.1268281
PubMed: Not supplied

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