Influence of industrial light pollution on the sea-finding behaviour of flatback turtle hatchlings

摘要: Context Numerous studies show that artificial light disrupts the sea-finding ability of marine turtle hatchlings. Yet very little has been published regarding for flatback turtles. Given current industrialisation Australia’s coastline, and large potential disruption posed by industrial light, this study is a timely investigation into behaviour Aims We investigate hatchlings in relation to ambient present areas planned or ongoing development, evaluate fan arena-based methods are frequently used quantifying hatchling dispersion. Methods Using combination methods, we assessed angular range directional preference at two key rookeries, Peak Curtis Islands, during January–February 2012 2013, Island January 2014. Relative levels each site were measured using an Optec SSP-3 stellar photometer, moon phase, stage cloud cover also recorded. Key results found no evidence impaired orientation, observed low Island. However, Island, displayed reduced ability, with horizons from direction nearby industry significantly brighter than other directions. The was less pronounced presence moonlight. Conclusions likely due both altered industry, as well beach topography. Both assessing orientation have benefits limitations. suggest fan-based combined strategically placed arenas, would provide best data accurately sea-finding. Implications Sky glow produced large-scale development appears detrimental As continues around strongly recommend continued monitoring lighting impacts adjacent nesting beaches. advise rigorous management lighting, which considers cumulative regions multiple producers, moon-stage, time emergence. All these factors affect likelihood disrupted beaches exposed light-glow, otherwise.