Journal
CONSERVATION SCIENCE AND PRACTICE
Volume -, Issue -, Pages -Publisher
WILEY
DOI: 10.1111/csp2.13014
Keywords
ALAN; fallout; fledging; grounding; moon cycle; moon phase; Procellariiformes; rescue campaign
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Rescue programs have found that fewer seabird fledglings are grounded during full moon nights. Two hypotheses have been proposed: reduced attraction and disorientation due to light pollution, and reduced fledging activity during moonlit nights. Evidence suggests that the first hypothesis is supported while the second is not. More fledglings are able to safely reach the sea during full moon nights, indicating a decrease in the severity of light pollution on seabirds.
Rescue programs aiming to mitigate light-induced mortality of seabird fledglings have reported that fewer birds are grounded (and rescued) during full moon nights. Two non-mutually exclusive hypotheses have been proposed as explanations: (1) reduction of strandings because birds are less attracted to and disorientated by light pollution during full moon nights; and (2) reduction of fledging activity, that is, chicks avoid departing the colony during nights with increased moonlight. We argue that evidence from rescue programs and other studies supports the first but not the second hypothesis. The evidence supports the conclusion that a higher proportion of fledglings make it safely to sea during full moon nights than during moonless nights. Thus, there is a decrease in the severity of light pollution on seabirds around the full moon.
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