Magnetic compass orientation in C57BL/6J mice

Muheim, Rachel; Edgar, Nicole; Sloan, Kelly; Phillips, John B.

doi:10.3758/bf03193201

Cited by 83 publications

(113 citation statements)

References 36 publications

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“…This is somewhat at odds with the bird literature, which suggests that different effects occur at different light intensities (Muheim et al 2002) and that these light intensity-dependent effects in birds are related to prior light conditioning. Whether or not other magnetic field-related behaviours in mice (Muheim et al 2006), such as orientation, are related to light intensity is still unknown.…”

Section: Discussionmentioning

confidence: 99%

“…Hence, their work cannot be extrapolated directly to mice with full rod and cone vision (Jacobs et al 2004;Umino et al 2008). Interestingly, Muheim et al (2006) have shown that mice can use a geomagnetic field as the sole method of finding their nest; however, it is still unclear whether the response is light dependent. Given these reports, we decided to investigate whether light intensity and wavelength can also affect the induction of analgesia by repeated ambient magnetic field (geomagnetic) shielding exposures.…”

Section: Introductionmentioning

confidence: 99%

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Light alters nociceptive effects of magnetic field shielding in mice: intensity and wavelength considerations

Prato

Desjardins-Holmes

Keenliside

et al. 2008

J. R. Soc. Interface.

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Previous experiments with mice have shown that repeated 1 hour daily exposure to an ambient magnetic field-shielded environment induces analgesia (antinociception). The exposures were carried out in the dark (less than 2.0!10 16 photons s K1 m K2 ) during the midlight phase of the diurnal cycle. However, if the mice were exposed in the presence of visible light (2.0!10 18 photons s K1 m K2 , 400-750 nm), then the analgesic effects of shielding were eliminated. Here, we show that this effect of light is intensity and wavelength dependent. Introduction of red light (peak at 635 nm) had little or no effect, presumably because mice do not have photoreceptors sensitive to red light above 600 nm in their eyes. By contrast, introduction of ultraviolet light (peak at 405 nm) abolished the effect, presumably because mice do have ultraviolet A receptors. Blue light exposures (peak at 465 nm) of different intensities demonstrate that the effect has an intensity threshold of approximately 12% of the blue light in the housing facility, corresponding to 5!10 16 photons s K1 m K2 (integral). This intensity is similar to that associated with photoreceptor-based magnetoreception in birds and in mice stimulates photopic/cone vision. Could the detection mechanism that senses ambient magnetic fields in mice be similar to that in bird navigation?

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Light alters nociceptive effects of magnetic field shielding in mice: intensity and wavelength considerations

Prato

Desjardins-Holmes

Keenliside

et al. 2008

J. R. Soc. Interface.

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“…For each RF treatment results of the four magnetic field directions were combined, either with respect to the changing magnetic north, or the unaltered topographic north. Using this procedure a magnetic response can be separated from a topographic response (Muheim et al, 2006). The resulting vector distributions were tested for departure from a random distribution using the Moore's modified Rayleigh-test (Moore, 1980).…”

Section: Discussionmentioning

confidence: 99%

High levels of maternally transferred mercury disrupt magnetic responses of snapping turtle hatchlings (Chelydra serpentina)

Landler

Painter

Coe

et al. 2017

Environmental Pollution

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a b s t r a c tThe Earth's magnetic field is involved in spatial behaviours ranging from long-distance migration to nongoal directed behaviours, such as spontaneous magnetic alignment (SMA). Mercury is a harmful pollutant most often generated from anthropogenic sources that can bio-accumulate in animal tissue over a lifetime. We compared SMA of hatchling snapping turtles from mothers captured at reference (i.e., low mercury) and mercury contaminated sites. Reference turtles showed radio frequency-dependent SMA along the north-south axis, consistent with previous studies of SMA, while turtles with high levels of maternally inherited mercury failed to show consistent magnetic alignment. In contrast, there was no difference between reference and mercury exposed turtles on standard performance measures. The magnetic field plays an important role in animal orientation behaviour and may also help to integrate spatial information from a variety of sensory modalities. As a consequence, mercury may compromise the performance of turtles in a wide variety of spatial tasks. Future research is needed to determine the threshold for mercury effects on snapping turtles, whether mercury exposure compromises spatial behaviour of adult turtles, and whether mercury has a direct effect on the magnetoreception mechanism(s) that mediate SMA or a more general effect on the nervous system.

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“…Despite being phylogenetically widespread, magnetic compass orientation has been convincingly demonstrated in only a few species of mammals representing only 2 taxonomic groups: rodents (4)(5)(6)(7)(8) and bats (9,10). Not surprisingly, all these model species are small mammals amenable to experimental manipulation of the ambient magnetic field.…”

mentioning

confidence: 99%

Extremely low-frequency electromagnetic fields disrupt magnetic alignment of ruminants

Burda

Begall

Červený

et al. 2009

Proc. Natl. Acad. Sci. U.S.A.

100

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Resting and grazing cattle and deer tend to align their body axes in the geomagnetic North-South direction. The mechanism(s) that underlie this behavior remain unknown. Here, we show that extremely low-frequency magnetic fields (ELFMFs) generated by high-voltage power lines disrupt alignment of the bodies of these animals with the geomagnetic field. Body orientation of cattle and roe deer was random on pastures under or near power lines. Moreover, cattle exposed to various magnetic fields directly beneath or in the vicinity of power lines trending in various magnetic directions exhibited distinct patterns of alignment. The disturbing effect of the ELFMFs on body alignment diminished with the distance from conductors. These findings constitute evidence for magnetic sensation in large mammals as well as evidence of an overt behavioral reaction to weak ELFMFs in vertebrates. The demonstrated reaction to weak ELFMFs implies effects at the cellular and molecular levels.cattle ͉ magnetoreception ͉ roe deer ͉ power lines

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Magnetic compass orientation in C57BL/6J mice

Cited by 83 publications

References 36 publications

Light alters nociceptive effects of magnetic field shielding in mice: intensity and wavelength considerations

Light alters nociceptive effects of magnetic field shielding in mice: intensity and wavelength considerations

High levels of maternally transferred mercury disrupt magnetic responses of snapping turtle hatchlings (Chelydra serpentina)

Extremely low-frequency electromagnetic fields disrupt magnetic alignment of ruminants

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