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5 ° n
9
81 ° n
9
Astronomical and Space Sciences not elsewhere classified
9
Biological Sciences not elsewhere classified
9
Ecology
9
Environmental Sciences not elsewhere classified
9
Inorganic Chemistry
9
Physiology
9
acoustic field observations
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although differences
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arctic krill
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arctic krill (<
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arctic ocean extends
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arctic polar night
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auroral components
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characterize light across
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circadian clock
9
constant darkness
9
darkest parts
9
div >< p
9
fundamental role
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high latitudes
9
latitudinal gradient
9
light measurements demonstrate
light plays
9
lower latitudes
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main migratory species
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maximum extent
9
midnight sun
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north pole
9
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