| Records |
| 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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| ISSN |
2050-2966 |
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| 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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no |
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IDA @ john @ |
Serial |
77 |
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| Author |
Sella, K.N.; Salmon, M.; Witherington, B.E. |
| Title |
Filtered Streetlights Attract Hatchling Marine Turtles |
Type |
Journal Article |
| Year |
2006 |
Publication |
Chelonian Conservation and Biology |
Abbreviated Journal |
Chelonian Conservation and Biology |
| Volume |
5 |
Issue |
2 |
Pages |
255-261 |
| Keywords |
Reptilia; Testudines; Cheloniidae; Loggerhead turtle; turtles; marine turtles; reptiles; Caretta caretta; Chelonia mydas; hatchlings; artificial lighting; light “trappingâ€; orientation; seafinding; Florida |
| Abstract |
On many nesting beaches, hatchling marine turtles are exposed to poled street lighting that disrupts their ability to crawl to the sea. Experiments were done to determine how hatchlings responded to street lighting transmitted through 2 filters that excluded the most disruptive wavelengths (those < 530 nm; those < 570 nm). Filtered lighting, however, also attracted the turtles though not as strongly as an unfiltered (high-pressure sodium vapor) lighting. Filtering is therefore of limited utility for light management, especially since other alternatives (such as lowering, shielding, or turning off unnecessary lighting; use of dimmer lights embedded in roadways) are more effective. |
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| ISSN |
1071-8443 |
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no |
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IDA @ john @ |
Serial |
78 |
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| Author |
Tuxbury, S.M.; Salmon, M. |
| Title |
Competitive interactions between artificial lighting and natural cues during seafinding by hatchling marine turtles |
Type |
Journal Article |
| Year |
2005 |
Publication |
Biological Conservation |
Abbreviated Journal |
Biological Conservation |
| Volume |
121 |
Issue |
2 |
Pages |
311-316 |
| Keywords |
Sea turtle; Orientation; Photopollution; Habitat restoration; animals; reptiles; marine turtles; conservation |
| Abstract |
Artificial lighting disrupts the nocturnal orientation of sea turtle hatchlings as they crawl from their nest to the ocean. Laboratory experiments in an arena were used to simultaneously present artificial light (that attracted the turtles toward “landâ€) and natural cues (a dark silhouette of the dune behind the beach) that promoted “seaward†orientation. Artificial lighting disrupted seaward crawling in the presence of low silhouettes, but not high silhouettes. Low silhouettes provided adequate cues for seaward crawling when the apparent brightness of artificial light was reduced. Based upon these results, we postulate that artificial light disrupts orientation by competing with natural cues. Current restoration practices at nesting beaches emphasize light reduction. However at many sites some lights cannot be modified. Our results suggest that pairing dune restoration (to enhance natural cues) with light reduction (to the extent possible) should significantly improve hatchling orientation, even at nesting beaches where lighting cannot be entirely eliminated. |
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| ISSN |
0006-3207 |
ISBN |
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no |
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IDA @ john @ |
Serial |
79 |
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| Author |
Vignoli, L.; Luiselli, L. |
| Title |
Better in the dark: two Mediterranean amphibians synchronize reproduction with moonlit nights |
Type |
Journal Article |
| Year |
2013 |
Publication |
Web Ecology |
Abbreviated Journal |
Web Ecol. |
| Volume |
13 |
Issue |
1 |
Pages |
1-11 |
| Keywords |
animals; amphibians; Hyla intermedia; Rana dalmatina; *Reproduction; reproductive strategies; Moon; moon phase; moonlight |
| Abstract |
In Amphibians, both positive and negative correlations between activity and full moon phase have been observed. In this study, we present data for two anuran species (Hyla intermedia and Rana dalmatina) studied in a hilly Mediterranean area of central Italy. We analysed, in a two-year survey, the relationships between the number of egg clutches laid each night and the moon phases by means of circular statistics. Moreover, the studied species exhibited clear oviposition site selection behaviour influenced, at least in H. intermedia, by moon phases. We observed the occurrence of an avoidance effect by amphibians for oviposition and specific egg-laying behaviour during moon phases around the full moon. This apparent lunar phobia was evident in both species when yearly data were pooled. On the other hand, while this pattern continued to be also evident in H. intermedia when single years were considered, in R. dalmatina it stood just in one year of study. Nonetheless, during cloudy nights, when moonlight arriving on the ground was low, the frogs' behaviour was similar to that observed in new moon phases. We interpreted the observed pattern as an anti-predatory strategy. Overall, comparisons between our own study and previous research suggest that there was insufficient evidence to establish any unequivocal patterns and that further research in this regard is needed. |
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1399-1183 |
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no |
| Call Number |
IDA @ john @ |
Serial |
80 |
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