|   | 
Author Thums, M.; Whiting, S.D.; Reisser, J.; Pendoley, K.L.; Pattiaratchi, C.B.; Proietti, M.; Hetzel, Y.; Fisher, R.; Meekan, M.G.
Title Artificial light on water attracts turtle hatchlings during their near shore transit Type Journal Article
Year 2016 Publication Royal Society Open Science Abbreviated Journal R. Soc. open sci.
Volume 3 Issue 5 Pages 160142
Keywords Animals; acoustic telemetry; in-water movement; VR2W positioning system; green turtle; light pollution; coastal development; Chelonia mydas; ecology; sea turtle
Abstract We examined the effect of artificial light on the near shore trajectories of turtle hatchlings dispersing from natal beaches. Green turtle (Chelonia mydas) hatchlings were tagged with miniature acoustic transmitters and their movements tracked within an underwater array of 36 acoustic receivers placed in the near shore zone. A total of 40 hatchlings were tracked, 20 of which were subjected to artificial light during their transit of the array. At the same time, we measured current speed and direction, which were highly variable within and between experimental nights and treatments. Artificial lighting affected hatchling behaviour, with 88% of individual trajectories oriented towards the light and spending, on average, 23% more time in the 2.25 ha tracking array (19.5 ± 5 min) than under ambient light conditions (15.8 ± 5 min). Current speed had little to no effect on the bearing (angular direction) of the hatchling tracks when artificial light was present, but under ambient conditions it influenced the bearing of the tracks when current direction was offshore and above speeds of approximately 32.5 cm s−1. This is the first experimental evidence that wild turtle hatchlings are attracted to artificial light after entering the ocean, a behaviour that is likely to subject them to greater risk of predation. The experimental protocol described in this study can be used to assess the effect of anthropogenic (light pollution, noise, etc.) and natural (wave action, current, wind, moonlight) influences on the in-water movements of sea turtle hatchlings during the early phase of dispersal.
Address Australian Institute of Marine Science c/o The UWA Oceans Institute (MO96), University of Western Australia, 35 Stirling Highway, Crawley, Western Australia 6009, Australia
Corporate Author Thesis
Publisher Royal Society Place of Publication Editor
Language English Summary Language English Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 2054-5703 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number IDA @ john @ Serial 1454
Permanent link to this record