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Impacts of Artificial Lighting on the Survival of Sea Turtles Michael Slattery
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Why should it matter? All 6 species of sea turtle that nest in North America are either Endangered or Threatened.
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Nesting Generally they nest every 1-3 years Females always return to the beach from which they hatched They may lay multiple clutches. Hatch after 6-13 weeks of incubation
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Nest survival Where they get deposited Predation Disease
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Hatching success 80% of the eggs hatch Upon emergence they’ll orient themselves to the brightest light field. Only 1 in 1000 hatchlings make it to adulthood and reproduce
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Human activities can compound the problem 53% of the US. Population lives within 60 miles of the Coast. This requires significant infrastructure. The beaches are very economically valuable to the US.
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Several possible outcomes Depends on the magnitude of brightness Pick the wrong way –Sunrise –Swimming pools –Cars –Domestic animals –Natural predators
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What do you think? Low natural success Human impact –Redirect lights –Lower intensities Something should be done
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