| Records |
| Author |
Kamrowski, R.L.; Limpus, C.; Jones, R.; Anderson, S.; Hamann, M. |
| Title |
Temporal changes in artificial light exposure of marine turtle nesting areas |
Type  |
Journal Article |
| Year |
2013 |
Publication |
Global Change Biology |
Abbreviated Journal |
Glob Chang Biol |
| Volume |
20 |
Issue |
8 |
Pages |
2437-2449 |
| Keywords |
GIS analysis; artificial light; conservation planning; marine turtles; population resilience; temporal change |
| Abstract |
Artificial light at night poses a significant threat to multiple taxa across the globe. In coastal regions, artificial lighting close to marine turtle nesting beaches is disruptive to their breeding success. Prioritizing effective management of light pollution requires an understanding of how the light exposure of nesting areas changes over time in response to changing temporal and spatial distributions of coastal development. We analyzed multitemporal, satellite night-light data, in combination with linear mixed model analysis, to determine broadscale changes in artificial light exposure at Australian marine turtle nesting areas between 1993 and 2010. We found seven marine turtle management units (MU), from five species, have experienced significant increases in light exposure over time, with flatback turtles nesting in east Australia experiencing the fastest increases. The remaining 12 MUs showed no significant change in light exposure. Unchanging MUs included those previously identified as having high exposure to light pollution (located in western Australia and southern Queensland), indicating that turtles in these areas have been potentially exposed to high light levels since at least the early nineties. At a finer geographic scale (within-MU), nine MUs contained nesting areas with significant increases in light exposure. These nesting areas predominantly occurred close to heavily industrialized coastal areas, thus emphasizing the importance of rigorous light management in industry. Within all MUs, nesting areas existed where light levels were extremely low and/or had not significantly increased since 1993. With continued coastal development, nesting females may shift to these darker/unchanging 'buffer' areas in the future. This is valuable information that informs our understanding of the capacity and resilience of marine turtles faced with coastal development: an understanding that is essential for effective marine turtle conservation. |
| Address |
School of Earth and Environmental Sciences, James Cook University, Townsville, QLD, 4811, Australia |
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| Language |
English |
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Series Issue |
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Edition |
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| ISSN |
1354-1013 |
ISBN |
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| Notes |
PMID:24353164 |
Approved |
no |
| Call Number |
IDA @ john @ |
Serial |
73 |
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| Author |
Kamrowski, R.; Limpus, C.; Moloney, J.; Hamann, M. |
| Title |
Coastal light pollution and marine turtles: assessing the magnitude of the problem |
Type |
Journal Article |
| Year |
2012 |
Publication |
Endangered Species Research |
Abbreviated Journal |
Endang. Species. Res. |
| Volume |
19 |
Issue |
1 |
Pages |
85-98 |
| Keywords |
Artificial light; Orientation; Coastal development; GIS analysis; Vulnerability assessment; turtles; reptiles; animals; marine turtles; Australia; Queensland |
| Abstract |
Globally significant numbers of marine turtles nest on Australian beaches; however, the human population of Australia is also heavily concentrated around coastal areas. Coastal development brings with it increases in artificial light. Since turtles are vulnerable to disorientation from artificial light adjacent to nesting areas, the mitigation of disruption caused by light pollution has become an important component of marine turtle conservation strategies in Australia. However, marine turtles are faced with a multitude of anthropogenic threats and managers need to prioritise impacts to ensure limited conservation resources can result in adequate protection of turtles. Knowledge of the extent to which nesting areas may be vulnerable to light pollution is essential to guide management strategies. We use geographical information system analysis to over-lay turtle nesting data onto night-time lights data produced by the NOAA National Geophysical Data Center, to assess the proportion of marine turtles in Australia potentially at risk from light pollution. We also identify the Australian nesting sites which may face the greatest threat from artificial light. Our assessment indicates that the majority of nesting turtles appear to be at low risk, but population management units in Western Australia and Queensland are vulnerable to light pollution. The risk to turtles from light generated by industrial developments appears significantly higher than at any other location. Consequently, managers of turtle management units in regions of proposed or on-going industrial development should anticipate potentially disrupted turtle behaviour due to light pollution. Our methodology will be useful to managers of turtles elsewhere. |
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Edition |
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| ISSN |
1863-5407 |
ISBN |
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| Notes |
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Approved |
no |
| Call Number |
IDA @ john @ |
Serial |
74 |
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| Author |
Fritsches, K.A. |
| Title |
Australian Loggerhead sea turtle hatchlings do not avoid yellow |
Type |
Journal Article |
| Year |
2012 |
Publication |
Marine and Freshwater Behaviour and Physiology |
Abbreviated Journal |
Marine and Freshwater Behaviour and Physiology |
| Volume |
45 |
Issue |
2 |
Pages |
79-89 |
| Keywords |
Flatback turtle; Natator depressus; animals; reptiles; marine turtles; turtles; Loggerhead turtle; Caretta caretta |
| Abstract |
When emerging from the nest, sea turtle hatchlings primarily orient using visual stimuli, with light pollution known to disrupt effective sea localization behavior. Previous studies have shown that sea turtle hatchlings respond differently to different wavelengths of light but Loggerhead hatchlings, exclusively among species tested, have a strong aversion to yellow light (at 600 nm). This study repeats these experiments with an Australian population of Loggerhead hatchlings (Caretta caretta) and Flatback hatchlings (Natator depressus). The orientation preference was measured using a modified y-maze set-up with the animals response observed using an infrared camera. This study showed that both Loggerhead and Flatback hatchlings can see and are attracted to light in the ultraviolet waveband (365 nm) and, to a lesser extent to longer wavelengths of 600 nm and above. The surprising finding was that the Loggerhead hatchlings tested here, unlike their conspecifics in Florida, do not show any avoidance to yellow but are attracted to bright lights of wavelength between 365 nm (UV) and 600 nm. This suggests potential differences in the visual behavior among different populations of sea turtles of the same species. No difference was detected in the response of Loggerhead hatchlings to flickering or steady light stimuli. |
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Edition |
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| ISSN |
1023-6244 |
ISBN |
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Medium |
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| Notes |
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Approved |
no |
| Call Number |
IDA @ john @ |
Serial |
75 |
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| Author |
Zheleva, M. |
| Title |
The dark side of light. Light pollution kills leatherback turtle hatchlings |
Type |
Journal Article |
| Year |
2012 |
Publication |
Biodiscovery |
Abbreviated Journal |
Biodiscovery |
| Volume |
3 |
Issue |
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Pages |
e8930 |
| Keywords |
Leatherback turtle; animals; reptiles; turtles; marine turtles; light pollution; Tobago |
| Abstract |
The leatherback turtle is the largest and most migratory of all sea turtles and deepest diving air-breathing animal. It has unique physiology which allows it to adapt to various habitats ranging from sub-polar to equatorial during its migrations. The leatherback turtle is also the only sea turtle where no cases of tumours have been diagnosed. These unique features add to the arguments for preservation of this endangered species. Here we discuss the effect of light pollution on leatherback turtle hatchlings in Tobago and the measures for their protection. |
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Edition |
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| ISSN |
2050-2966 |
ISBN |
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Approved |
no |
| Call Number |
IDA @ john @ |
Serial |
76 |
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| Author |
Lorne, J.; Salmon, M. |
| Title |
Effects of exposure to artificial lighting on orientation of hatchling sea turtles on the beach and in the ocean |
Type |
Journal Article |
| Year |
2007 |
Publication |
Endangered Species Research |
Abbreviated Journal |
Endang. Species Res. |
| Volume |
3 |
Issue |
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Pages |
23-30 |
| Keywords |
Sea-finding · Orientation; Migration; Sea turtle; Loggerhead turtle; Caretta caretta; Photopollution; animals; turtles; marine turtles; reptiles |
| Abstract |
Artificial lighting disrupts sea turtle hatchling orientation from the nest to the sea. We studied how a light-induced landward crawl affects the later ability of hatchlings to crawl to the sea, and to swim away from the shore from a dark beach. A brief (2 min) landward crawl had no effect on swimming orientation as long as surface waves were present. In a calm sea, landward-crawling hatchlings failed to swim offshore, while those crawling seaward were well oriented. A long (2 h) crawl toward a landward light source, however, impaired the ability of hatchlings to crawl seaward. These results demonstrate that orientation toward artificial light sources compromises the ability of hatchlings to respond to natural orientation cues, both on land and in the sea. Based on these results, we suggest several changes to current management practices used when releasing misoriented turtles in the wild. |
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| ISSN |
1863-5407 |
ISBN |
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| Notes |
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Approved |
no |
| Call Number |
IDA @ john @ |
Serial |
77 |
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