Geomagnetic field affects spring migratory direction in a long distance migrant

Henshaw, Ian; Fransson, Thord; Jakobsson, Sven; Kullberg, Cecilia

doi:10.1007/s00265-010-0946-8

Cited by 37 publications

(34 citation statements)

References 34 publications

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“…Experiments in juvenile Chinook salmon [30], steelhead trout [31], sea turtles [19][20][21]25,28,29] and lobsters [24] suggest that these animals use the combination of magnetic intensity and inclination angle as an indicator of their geographical position. (Newts [22,23] and birds [18,27,60] probably do as well, though evidence in these animals is less conclusive [62,63].) For pink and sockeye salmon, the gradients of magnetic intensity and inclination angle across the North Pacific could provide the information necessary to complete the oceanic phase of the homing migration (figures 1a,b and 3).…”

Section: Discussionmentioning

confidence: 99%

Geomagnetic imprinting predicts spatio-temporal variation in homing migration of pink and sockeye salmon

Putman

Jenkins

Michielsens

et al. 2014

J. R. Soc. Interface.

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Animals navigate using a variety of sensory cues, but how each is weighted during different phases of movement (e.g. dispersal, foraging, homing) is controversial. Here, we examine the geomagnetic and olfactory imprinting hypotheses of natal homing with datasets that recorded variation in the migratory routes of sockeye (Oncorhynchus nerka) and pink (Oncorhynchus gorbuscha) salmon returning from the Pacific Ocean to the Fraser River, British Columbia. Drift of the magnetic field (i.e. geomagnetic imprinting) uniquely accounted for 23.2% and 44.0% of the variation in migration routes for sockeye and pink salmon, respectively. Ocean circulation (i.e. olfactory imprinting) predicted 6.1% and 0.1% of the variation in sockeye and pink migration routes, respectively. Sea surface temperature (a variable influencing salmon distribution but not navigation, directly) accounted for 13.0% of the variation in sockeye migration but was unrelated to pink migration. These findings suggest that geomagnetic navigation plays an important role in long-distance homing in salmon and that consideration of navigation mechanisms can aid in the management of migratory fishes by better predicting movement patterns. Finally, given the diversity of animals that use the Earth's magnetic field for navigation, geomagnetic drift may provide a unifying explanation for spatio-temporal variation in the movement patterns of many species.

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Section: Discussionmentioning

confidence: 99%

Geomagnetic imprinting predicts spatio-temporal variation in homing migration of pink and sockeye salmon

Putman

Jenkins

Michielsens

et al. 2014

J. R. Soc. Interface.

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“…However, thrush nightingales (Luscinia luscinia) had significantly higher fattening rate when exposed to the magnetic field of northern Egypt during autumn migration compared to control birds exposed to the local magnetic field of Sweden (Fransson et al, 2001;Kullberg et al, 2003). Chang ing magnetic field parameters (total intensity and inclination) were reported to affect fat deposition rate and migratory direction in European robins and lesser whitethroats (Sylvia curruca) during both autumn and spring migration (Kullberg et al, 2007;Henshaw et al, 2010). These could not be compass effects, because magnetic compass direction was not manipu lated in these studies.…”

Section: Functions and Interaction Of Chemical And Iron Based Magnetomentioning

confidence: 96%

Magnetoreception systems in birds: A review of current research

Kishkinev

Chernetsov

2015

Biol Bull Rev

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At least two independent systems of magnetoreception are currently believed to exist in birds, based on different biophysical principles, located in different parts of their bodies, and with different neu roanatomical mechanisms. One magnetoreceptory system is located in the retina, and may be based on pho tochemical reactions on the basis of cryptochrome. Information from these receptors is processed in a spe cialized part of visual Wulst, the so called Cluster N. There are good reasons to believe that this visual mag netoreceptor processes compass magnetic information necessary for migratory orientation. The second magnetoreceptory system is probably iron based (biogenic magnetite), located somewhere in the upper beak (its exact location and ultrastructure of receptors remain unknown) and innervated by the ophthalmic branch of trigeminal nerve. It cannot be ruled out that this system participates in spatial representation and helps forming either a kind of map or more primitive signpost sense (identification of specific geographic regions), based on regular spatial variation of the geomagnetic field. The magnetic map probably enables navigation of migrating birds across hundreds and thousands of kilometres. Apart from these two systems, whose existence has been convincingly shown (even if some details are not fully clear yet), there is evidence for the existence of magnetoreceptors based on the vestibular system. It cannot be ruled out that iron based magnetoreception takes place in lagena (a part of inner ear in fishes, amphibians, reptiles and birds), and the information per ceived is processes in vestibular nuclei. The very existence of this magnetoreception system needs verification, and its function remains completely open.

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“…Such transient periods of rapid change, however, do not preclude the evolution of magnetic responses during the intervening and usually longer intervals (Skiles, 1985) when the Earth's field changes slowly and is relatively stable. Indeed, responses similar to those we describe in sea turtles might also function in the navigation of diverse migratory animals (Block et al, 2001;Gonzalez-Solis et al, 2007;Henshaw et al, 2010;Le Boeuf et al, 2000;Quinn and Dittman, 1990).…”

Section: Natural Field Change and Orientation Responsesmentioning

confidence: 99%

Orientation of hatchling loggerhead sea turtles to regional magnetic fields along a transoceanic migratory pathway

Fuxjager

Eastwood

Lohmann

2011

Journal of Experimental Biology

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SUMMARYYoung loggerhead sea turtles (Caretta caretta) from the east coast of Florida, USA, undertake a transoceanic migration around the North Atlantic Gyre, the circular current system that flows around the Sargasso Sea. Previous experiments indicated that loggerhead hatchlings, when exposed to magnetic fields replicating those that exist at five widely separated locations along the migratory pathway, responded by swimming in directions that would, in each case, help turtles remain in the gyre and advance along the migratory route. In this study, hatchlings were exposed to several additional magnetic fields that exist along or outside of the gyre's northern boundary. Hatchlings responded to fields that exist within the gyre currents by swimming in directions consistent with their migratory route at each location, whereas turtles exposed to a field that exists north of the gyre had an orientation that was statistically indistinguishable from random. These results are consistent with the hypothesis that loggerhead turtles entering the sea for the first time possess a navigational system in which a series of regional magnetic fields sequentially trigger orientation responses that help steer turtles along the migratory route. By contrast, hatchlings may fail to respond to fields that exist in locations beyond the turtles' normal geographic range.

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Geomagnetic field affects spring migratory direction in a long distance migrant

Cited by 37 publications

References 34 publications

Geomagnetic imprinting predicts spatio-temporal variation in homing migration of pink and sockeye salmon

Geomagnetic imprinting predicts spatio-temporal variation in homing migration of pink and sockeye salmon

Magnetoreception systems in birds: A review of current research

Orientation of hatchling loggerhead sea turtles to regional magnetic fields along a transoceanic migratory pathway

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