Myths in Magnetosensation

Abstract

Myths in Magnetosensation Simon Nimpf, David A. Keays. Myths in magnetosensation. 25(6); 104454. May 23, 2022. doi: 10.1016/j.isci.2022.104454. Summary The ability to detect magnetic fields is a sensory modality that is used by many animals to navigate. While first postulated in the 1800s, for decades, it was considered a biological myth. A series of elegant behavioral experiments in the 1960s and 1970s showed conclusively that the sense is real; however, the underlying mechanism(s) remained unresolved. Consequently, this has given rise to a series of beliefs that are critically analyzed in this manuscript. We address six assertions: (1) Magnetoreception does not exist; (2) It has to be magnetite; (3) Birds have a conserved six loci magnetic sense system in their upper beak; (4) It has to be cryptochrome; (5) MagR is a protein biocompass; and (6) The electromagnetic induction hypothesis is dead. In advancing counter-arguments for these beliefs, we hope to stimulate debate, new ideas, and the design of well- controlled experiments that can aid our understanding of this fascinating biological phenomenon. Open access paper: cell.com

AI evidence extraction

Main findings

This manuscript critically analyzes six common assertions about magnetoreception (including claims about magnetite, cryptochrome, MagR, and electromagnetic induction) and presents counter-arguments intended to stimulate debate and encourage well-controlled experiments.

Outcomes measured

• magnetoreception/magnetosensation mechanisms
• evaluation of assertions about magnetite, cryptochrome, MagR, electromagnetic induction hypothesis

Limitations

• Narrative/critical analysis rather than primary experimental data (as described in the summary)
• No exposure parameters (e.g., field strength, frequency, duration) reported in the abstract

{
    "study_type": "review",
    "exposure": {
        "band": null,
        "source": "magnetic fields (magnetosensation/magnetoreception)",
        "frequency_mhz": null,
        "sar_wkg": null,
        "duration": null
    },
    "population": "animals (including birds)",
    "sample_size": null,
    "outcomes": [
        "magnetoreception/magnetosensation mechanisms",
        "evaluation of assertions about magnetite, cryptochrome, MagR, electromagnetic induction hypothesis"
    ],
    "main_findings": "This manuscript critically analyzes six common assertions about magnetoreception (including claims about magnetite, cryptochrome, MagR, and electromagnetic induction) and presents counter-arguments intended to stimulate debate and encourage well-controlled experiments.",
    "effect_direction": "unclear",
    "limitations": [
        "Narrative/critical analysis rather than primary experimental data (as described in the summary)",
        "No exposure parameters (e.g., field strength, frequency, duration) reported in the abstract"
    ],
    "evidence_strength": "insufficient",
    "confidence": 0.7399999999999999911182158029987476766109466552734375,
    "peer_reviewed_likely": "unknown",
    "keywords": [
        "magnetosensation",
        "magnetoreception",
        "magnetic fields",
        "birds",
        "magnetite",
        "cryptochrome",
        "MagR",
        "electromagnetic induction"
    ],
    "suggested_hubs": []
}

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