Data

Response of turtle hatchlings to light emitting diodes at sea

Australian Institute of Marine Science
Australian Institute of Marine Science (AIMS)
Viewed: [[ro.stat.viewed]] Cited: [[ro.stat.cited]] Accessed: [[ro.stat.accessed]]
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/cbec5004-701b-436f-b286-a99c476c0881&rft.title=Response of turtle hatchlings to light emitting diodes at sea&rft.identifier=https://apps.aims.gov.au/metadata/view/cbec5004-701b-436f-b286-a99c476c0881&rft.publisher=Australian Institute of Marine Science (AIMS)&rft.description=We used passive acoustic telemetry to examine the effects of five different intensities of Light Emitting Diodes (4000K floodlight) on the movement patterns and predation rates of flatback turtle (Natator depressus) hatchlings as they disperse through nearshore waters. A total of 68 hatchlings were released, 36 of which were released when the light sources were present on a boat located to the east of the hatchling release point and 32 were released when the light sources were present on a boat located to the west of the release location. Five or six hatchlings were released in each treatment (Ambient, 10 watt, 30 watt, 50 watt, 70 watt, 120 watt). Attraction of hatchlings to lights increased with light intensity only when lights were located in the direction that hatchlings preferred to disperse under ambient conditions (west). This suggests that the location of the light source in relation to the preferred direction of travel may be important in determining the impact on hatchlings. When the light source was not in the direction of travel, only 25% of hatchlings were attracted to it. Predation of hatchlings was higher when LEDs were illuminated than under ambient light conditions. We found no clear relationship with predation rates or time spent in the nearshore with light intensity, although a combination of high variability in environmental conditions across nights, low sample sizes, and the relatively low intensity of our light treatments might have affected our ability to detect an effect. The hatchling predation rates we recorded and the finding that hatchlings spent 20% longer in predator-rich nearshore areas for all light intensities on one of the nights suggest that the presence of LEDs, regardless of their intensity, is likely to have a negative impact on the survivorship of hatchlings passing through the nearshore.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=114.98265266418458; southlimit=-21.446917426082944; eastlimit=114.98265266418458; northlimit=-21.446917426082944&rft.coverage=westlimit=114.98265266418458; southlimit=-21.446917426082944; eastlimit=114.98265266418458; northlimit=-21.446917426082944&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). Response of turtle hatchlings to light emitting diodes at sea. https://apps.aims.gov.au/metadata/view/cbec5004-701b-436f-b286-a99c476c0881, 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). Response of turtle hatchlings to light emitting diodes at sea. https://apps.aims.gov.au/metadata/view/cbec5004-701b-436f-b286-a99c476c0881, accessed[date-of-access]".

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Brief description

We used passive acoustic telemetry to examine the effects of five different intensities of Light Emitting Diodes (4000K floodlight) on the movement patterns and predation rates of flatback turtle (Natator depressus) hatchlings as they disperse through nearshore waters. A total of 68 hatchlings were released, 36 of which were released when the light sources were present on a boat located to the east of the hatchling release point and 32 were released when the light sources were present on a boat located to the west of the release location. Five or six hatchlings were released in each treatment (Ambient, 10 watt, 30 watt, 50 watt, 70 watt, 120 watt). Attraction of hatchlings to lights increased with light intensity only when lights were located in the direction that hatchlings preferred to disperse under ambient conditions (west). This suggests that the location of the light source in relation to the preferred direction of travel may be important in determining the impact on hatchlings. When the light source was not in the direction of travel, only 25% of hatchlings were attracted to it. Predation of hatchlings was higher when LEDs were illuminated than under ambient light conditions. We found no clear relationship with predation rates or time spent in the nearshore with light intensity, although a combination of high variability in environmental conditions across nights, low sample sizes, and the relatively low intensity of our light treatments might have affected our ability to detect an effect. The hatchling predation rates we recorded and the finding that hatchlings spent 20% longer in predator-rich nearshore areas for all light intensities on one of the nights suggest that the presence of LEDs, regardless of their intensity, is likely to have a negative impact on the survivorship of hatchlings passing through the nearshore.

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

Modified: 17 10 2024

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114.98265,-21.44692

114.98265266418,-21.446917426083

text: westlimit=114.98265266418458; southlimit=-21.446917426082944; eastlimit=114.98265266418458; northlimit=-21.446917426082944

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Other Information
Wilson Phillipa, Pendoley Kellie, Whiting Scott, Pattiaratchi Charitha, Meekan Mark, Thums Michele (2022) Response of turtle hatchlings to light emitting diodes at sea. Marine and Freshwater Research, https://doi.org/10.1071/MF21217

doi : https://doi.org/10.1071/MF21217

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  • global : cbec5004-701b-436f-b286-a99c476c0881
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