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5 ° n
3
81 ° n
3
Astronomical and Space Sciences not elsewhere classified
3
Biological Sciences not elsewhere classified
3
Ecology
3
Environmental Sciences not elsewhere classified
3
Inorganic Chemistry
3
Physiology
3
acoustic field observations
3
although differences
3
arctic krill
3
arctic krill (<
3
arctic ocean extends
3
arctic polar night
3
auroral components
3
characterize light across
3
circadian clock
3
constant darkness
3
darkest parts
3
div >< p
fundamental role
3
high latitudes
3
latitudinal gradient
3
light measurements demonstrate
3
light plays
3
lower latitudes
3
main migratory species
3
maximum extent
3
midnight sun
3
north pole
3
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