Data

Artificial light disrupts the nearshore dispersal of neonate flatback turtles Natator depressus

Australian Institute of Marine Science
Australian Institute of Marine Science (AIMS)
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ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=https://apps.aims.gov.au/metadata/view/f467e477-7244-44f9-997b-3e4a13c1f48d&rft.title=Artificial light disrupts the nearshore dispersal of neonate flatback turtles Natator depressus&rft.identifier=https://apps.aims.gov.au/metadata/view/f467e477-7244-44f9-997b-3e4a13c1f48d&rft.publisher=Australian Institute of Marine Science (AIMS)&rft.description=We used passive acoustic telemetry to examine the effects of two types of artificial light (metal halide and high pressure sodium) on the movement patterns of flatback turtle (Natator depressus) hatchlings as they disperse through nearshore waters. A total of 91 hatchlings were released, 30 of which were released under ambient conditions, 31 were released when a high pressure sodium light was present on a boat anchored in the nearshore and 30 were released when a metal halide light was present on the boat. Artificial light attracted hatchlings during their dispersal from shore, causing them to become disoriented and thus spend more time in the near shore. The metal halide light was more disruptive than high pressure sodium. Ocean currents influenced hatchling trajectories under ambient conditions but when light was present, their effect was diminished as attraction to lights caused hatchlings to swim against currents. Under ambient conditions hatchlings moved perpendicular to the shoreline and did not appear to orient towards the peak wave direction. Our study shows that artificial lights at sea can delay the transit of hatchlings through the nearshore and cause them to expend energy lingering around light sources. As such, light mitigation strategies similar to those used on land are needed to minimise impacts on hatchlings in water.Maintenance and Update Frequency: notPlannedStatement: Data description: Tag detections and locations Hatchling measurements Hatchling release location Receiver and light source locations Oceanographic data Funding Body: Department of Biodiversity, Conservation and Attractions (DBCA). P. Wilson was supported by an Australian Government Research Training Program (RTP) Scholarship and a top-up scholarship from The University of Western Australia (UWA).&rft.creator=Australian Institute of Marine Science (AIMS) &rft.date=2024&rft.coverage=westlimit=114.8830032348633; southlimit=-21.521114004578827; eastlimit=115.08281707763673; northlimit=-21.386909590741197&rft.coverage=westlimit=114.8830032348633; southlimit=-21.521114004578827; eastlimit=115.08281707763673; northlimit=-21.386909590741197&rft_rights=Creative Commons Attribution-NonCommercial 3.0 Australia License http://creativecommons.org/licenses/by-nc/3.0/au/&rft_rights=Use Limitation: All AIMS data, products and services are provided as is and AIMS does not warrant their fitness for a particular purpose or non-infringement. While AIMS has made every reasonable effort to ensure high quality of the data, products and services, to the extent permitted by law the data, products and services are provided without any warranties of any kind, either expressed or implied, including without limitation any implied warranties of title, merchantability, and fitness for a particular purpose or non-infringement. AIMS make no representation or warranty that the data, products and services are accurate, complete, reliable or current. To the extent permitted by law, AIMS exclude all liability to any person arising directly or indirectly from the use of the data, products and services.&rft_rights=Attribution: Format for citation of metadata sourced from Australian Institute of Marine Science (AIMS) in a list of reference is as follows: Australian Institute of Marine Science (AIMS). (2020). Artificial light disrupts the nearshore dispersal of neonate flatback turtles Natator depressus. https://apps.aims.gov.au/metadata/view/f467e477-7244-44f9-997b-3e4a13c1f48d, accessed[date-of-access].&rft_subject=oceans&rft.type=dataset&rft.language=English Access the data
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Creative Commons Attribution-NonCommercial 3.0 Australia License
http://creativecommons.org/licenses/by-nc/3.0/au/

Use Limitation: All AIMS data, products and services are provided "as is" and AIMS does not warrant their fitness for a particular purpose or non-infringement. While AIMS has made every reasonable effort to ensure high quality of the data, products and services, to the extent permitted by law the data, products and services are provided without any warranties of any kind, either expressed or implied, including without limitation any implied warranties of title, merchantability, and fitness for a particular purpose or non-infringement. AIMS make no representation or warranty that the data, products and services are accurate, complete, reliable or current. To the extent permitted by law, AIMS exclude all liability to any person arising directly or indirectly from the use of the data, products and services.

Attribution: Format for citation of metadata sourced from Australian Institute of Marine Science (AIMS) in a list of reference is as follows: "Australian Institute of Marine Science (AIMS). (2020). Artificial light disrupts the nearshore dispersal of neonate flatback turtles Natator depressus. https://apps.aims.gov.au/metadata/view/f467e477-7244-44f9-997b-3e4a13c1f48d, accessed[date-of-access]".

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Brief description

We used passive acoustic telemetry to examine the effects of two types of artificial light (metal halide and high pressure sodium) on the movement patterns of flatback turtle (Natator depressus) hatchlings as they disperse through nearshore waters. A total of 91 hatchlings were released, 30 of which were released under ambient conditions, 31 were released when a high pressure sodium light was present on a boat anchored in the nearshore and 30 were released when a metal halide light was present on the boat. Artificial light attracted hatchlings during their dispersal from shore, causing them to become disoriented and thus spend more time in the near shore. The metal halide light was more disruptive than high pressure sodium. Ocean currents influenced hatchling trajectories under ambient conditions but when light was present, their effect was diminished as attraction to lights caused hatchlings to swim against currents. Under ambient conditions hatchlings moved perpendicular to the shoreline and did not appear to orient towards the peak wave direction. Our study shows that artificial lights at sea can delay the transit of hatchlings through the nearshore and cause them to expend energy lingering around light sources. As such, light mitigation strategies similar to those used on land are needed to minimise impacts on hatchlings in water.

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Maintenance and Update Frequency: notPlanned
Statement: Data description: Tag detections and locations Hatchling measurements Hatchling release location Receiver and light source locations Oceanographic data Funding Body: Department of Biodiversity, Conservation and Attractions (DBCA). P. Wilson was supported by an Australian Government Research Training Program (RTP) Scholarship and a top-up scholarship from The University of Western Australia (UWA).

Notes

Credit
University of Western Australia (UWA), Australia
Credit
Department of Biodiversity, Conservation and Attractions (DBCA), Australia
Credit
Pendoley Environmental, Australia

Modified: 17 10 2024

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115.08282,-21.38691 115.08282,-21.52111 114.883,-21.52111 114.883,-21.38691 115.08282,-21.38691

114.98291015625,-21.45401179766

text: westlimit=114.8830032348633; southlimit=-21.521114004578827; eastlimit=115.08281707763673; northlimit=-21.386909590741197

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Other Information
Wilson P, Thums M, Pattiaratchi C, Meekan M, Pendoley K, Fisher R, Whiting S (2018). Artificial light disrupts the nearshore dispersal of neonate flatback turtles Natator depressus. Mar Ecol Prog Ser 600: 179-192

doi : https://doi.org/10.3354/meps12649

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  • global : f467e477-7244-44f9-997b-3e4a13c1f48d
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