Navigation Links
'Heat-proof' eggs help turtles cope with hot beaches
Date:9/26/2011

Sea turtles face an uncertain future as a warming climate threatens to reduce their reproductive viability. However, new research led by the University of Exeter and published this week in Proceedings of the Royal Society B shows that some turtles are naturally heat-tolerant.

The study focused on green turtles nesting on Ascension Island, a UK overseas territory in the South Atlantic Ocean. Scientists from the Universities of Exeter and Groningen found that eggs laid by turtles nesting on a naturally hot beach withstand high temperatures better than eggs from turtles nesting on a cooler beach just a few kilometres away.

The warmer beach has dark sand, whereas the neighbouring beach is two to three degrees Celsius cooler because it has white sand. Green turtles travel from the coast of South America to the tiny island to nest. Most female turtles nest on the beaches where they themselves hatched, so populations can become adapted to specific nesting locations.

The researchers placed some of the eggs laid on each beach into incubators of either 32.5 degrees Celsius or 29 degrees Celsius and monitored their progress. They found that the eggs from the warmer beach were better able to thrive in the hot incubator than those from the cooler beach.

Dr Jonathan Blount, who led the research, said: "We believe this is the first time that adaptation to local environmental conditions has been demonstrated in sea turtles, which is all the more remarkable because the beaches in question are just six kilometres apart".

Heat-tolerant populations may be crucial in allowing species to adapt to a warming world, highlighting the need for conservation strategies which protect diversity in animal populations.

University of Exeter PhD student Dr Sam Weber, lead author of the study, said: "Such adaptations probably evolve over many generations, so whether turtle evolution can keep pace with the rapid climate change that scientists have predicted remains to be seen. However, occasional movements of heat-adapted turtles to other nesting sites could help to spread their favourable genes."


'/>"/>

Contact: Sarah Hoyle
s.hoyle@exeter.ac.uk
44-013-927-22062
University of Exeter
Source:Eurekalert  

Related biology news :

1. Discovery places turtles next to lizards on family tree
2. Exeter study reveals US turtles movements
3. Africas sea turtles need passports for protection
4. Satellite tracking of sea turtles reveals potential threat posed by manmade chemicals
5. Migrating sea turtles have magnetic sense for longitude
6. Why leatherback turtles linger in South Pacific Gyre, and why it matters
7. Epic journeys of turtles revealed
8. How diving leatherback turtles regulate buoyancy
9. Commercial fishing estimated to kill millions of sea turtles
10. How can accidental captures of loggerhead turtles be reduced?
11. Turtles Christmas journey tracked by scientists
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
'Heat-proof' eggs help turtles cope with hot beaches
(Date:1/6/2017)... Jan. 6, 2017  Privately-held CalciMedica, Inc., announced ... healthy volunteers of a novel calcium release-activated calcium ... pancreatitis. Acute pancreatitis, sudden painful ... disorder, but can be very serious.  In severe cases ... where extended hospital stays, time in the ICU ...
(Date:1/6/2017)... -- Delta ID Inc., a leader in consumer-grade iris scanning ... CES® 2017. Delta ID has collaborated with Gentex Corporation ... of iris scanning as a secure, reliable and convenient ... car, and as a way to elevate the security ... ID and Gentex will demonstrate (booth #7326 LVCC) a ...
(Date:1/4/2017)... , Jan. 4, 2017  CES 2017 – ... sensor technology, today announced the launch of two ... systems, the highly-accurate biometric sensor modules that incorporate ... technology, experience and expertise. The two new designs ... specifically for hearables, and Benchmark BW2.0, a 2-LED ...
Breaking Biology News(10 mins):
(Date:1/21/2017)... , Jan. 21, 2017   Boston Biomedical ... compounds designed to target cancer stemness pathways, today presented ... compound, napabucasin, at the 2017 American Society of Clinical ... Francisco . In a Phase ... agent designed to inhibit cancer stemness pathways by targeting ...
(Date:1/20/2017)... Ginkgo Bioworks, the organism company, announced ... the synthesis and assembly of DNA. The acquisition ... synthetic DNA into Ginkgo,s automated organism engineering foundries, ... of new organism designs for application across a ... founded to significantly increase the world,s capacity to ...
(Date:1/19/2017)... , Jan 19, 2017 Research and Markets ... Profiling Technology, Biomolecules, Cancer Type, Application - Global Opportunity Analysis and ... ... that the global market is projected to reach $15,737 million by ... from 2016 to 2022. Omic technologies segment accounted ...
(Date:1/19/2017)... Jan. 19, 2017 /PRNewswire -- WuXi AppTec, a ... capability and technology platform, today announced that it ... focused preclinical drug discovery contract research organization (CRO). ... a wholly-owned subsidiary of WuXi, and will continue ... providing greater services. The acquisition will further strengthen ...
Breaking Biology Technology: