Navigation Links
Tortoise populations can withstand fires every 30 years
Date:7/19/2011

"increases the likelihood of a population becoming extinct", the authors explain.

However, when fires occur every 30 years (a frequency similar to the natural cycle in Mediterranean environments), medium-large populations of spur-thighed tortoises will not become extinct, according to models designed by the researchers. "Above this limit, the likelihood of extinction increases exponentially", the experts warn.

None of the youngest tortoises were able to survive the passage of fire in any kind of terrain, because of the type of shelter they choose below vegetation or in very shallow holes. They are also less able to withstand high temperatures, since their shells are not yet ossified.

Danger increases in spring

Although the fire reduced dozens of animals to ashes, the scientists found live individuals surviving in shelters they dig for themselves to sit out the periods of greatest temperature stress, in winter and summer.

The animals' behaviour changes in other seasons, however, and their activity levels increase. "In spring, the tortoises hide under bushes, meaning that, if a fire occurred at that time, they would all be wiped out", says Sanz-Aguilar.

The spur-thighed tortoise is found throughout Europe, Africa and Asia. In the European Union, the most numerous populations are found in the south east of Spain, between Murcia and Almeria, where they range over an area of 2,600 km2. "This is a typically Mediterranean species, and the natural landscapes of this zone suffer from certain kinds of fire, which recur infrequently", the researcher explains.

The International Union for the Conservation of Nature (IUCN) has classified this tortoise as 'vulnerable', and at risk of extinction over the medium term. In Spain, it is classified as 'endangered' on the Red Book of the Amphibians and Reptiles of Spain.


'/>"/>

Contact: SINC Team
info@agenciasinc.es
FECYT - Spanish Foundation for Science and Technology
Source:Eurekalert  

Page: 1 2

Related biology news :

1. Madagascars radiated tortoise threatened with extinction
2. New study shows how giant tortoises, alligators thrived in High Arctic 50 million years ago
3. In the race of life, better an adaptable tortoise than a fit hare
4. Giant tortoises show rewilding can work
5. Snakes, salamanders and other creatures thrive in areas with higher deer populations
6. Shifts in soil bacterial populations linked to wetland restoration success
7. Lake Michigan fish populations threatened by decline of tiny creature
8. You dont call, you dont write: Connectivity in marine fish populations
9. U of Minnesota-led study finds that hunters are depleting lion and cougar populations
10. Changing the course of nature: Are fisheries directing the evolution of fish populations?
11. Commercial fishing endangers dolphin populations
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Tortoise populations can withstand fires every 30 years
(Date:4/13/2015)... 13, 2015 According to ... Biometrics Market Forecast & Opportunities, 2020", the global biometrics ... around 14% till 2020. The biometrics market is ... implementation and review of biometric management systems. The ... products with greater efficiency, are resulting in increasing ...
(Date:4/8/2015)... , April 8, 2015  Infinisource, a leading ... services, and Morpho, a leading supplier of biometric ... produce the market,s most advanced biometrically-enabled time clock, ... NXG time clock is setting a bold, new ... data for the small and mid-size employer. When ...
(Date:4/2/2015)... , April 2, 2015 According ... 2015 attributed to somewhat higher than 125 MSEK. This ... year-end report 2014 that revenues for Q1 2015 would ... company reported for Q4 2014. The operating result for ... negative. The complete interim report will as previously communicated ...
Breaking Biology News(10 mins):Global Biometrics Market to Cross US$ 21 Billion by 2020: TechSci Research 2iSolved Time Clock Offers Unmatched Accuracy due to Morpho Biometrics 2iSolved Time Clock Offers Unmatched Accuracy due to Morpho Biometrics 3Fingerprint Cards Revises Revenues for Q1 2015 2
... MD -- The Biophysical Society is pleased to announce the ... Now in its third year and supported by supported by ... young investigators at the interface of the physical and life ... 2012 in San Diego, California as part of the Biophysical ...
... mean sinking your toes into smooth sand or walking firm-footed on ... exactly what it is that makes granular materials change from a ... a beach or rice grains in a hopper, being able to ... of a wide range of products. In a study ...
... MISSISSIPPI STATE, MISSISSIPPIAuthors of a recent study examined ... exactly how much plant knowledge is required for professionals ... Stortz evaluated the attitudes and perceptions of practicing landscape ... the importance of horticultural knowledge. The survey results were ...
Cached Biology News:Researchers explain what makes granular material become solid 2Researchers explain what makes granular material become solid 3Landscape architecture survey: Is plant knowledge passé? 2
(Date:5/4/2015)... 4, 2015  Tikcro Technologies Ltd. (OTCQB: TIKRF) announced ... Form 20-F for the fiscal year ended December 31, ... The annual report on Form 20-F contains information regarding ... the area of cancer immune checkpoints. This project aims ... specificity and binding in targeting certain identified immune checkpoints. ...
(Date:5/4/2015)... Genedata, a leading provider of ... science research, today announced the release of ... its enterprise solution for biologics R&D. This first-in-class ... discovery and development of novel biotherapeutics. Version 5.0 ... protein optimization and developability requirements. Genedata will present ...
(Date:5/4/2015)... --  Tocagen Inc. , a clinical-stage immuno-oncology company, ... investigational studies were presented at the 11 th ... Neurological Surgeons (AANS)/Congress of Neurological Surgeons (CNS) Section ... Washington, D.C. In addition, Tocagen ... and continues to advance towards initiation of a ...
(Date:5/1/2015)... 2015 OncoTAb, Inc., a ... company, announced that Pinku Mukherjee, Ph.D. has received the ... of Governors’ highest faculty honor. Mukherjee received the award, ... for her innovative research and development of cancer diagnostics ... a crowning moment in my scientific career,” said Mukherjee, ...
Breaking Biology Technology:Tikcro Technologies Files Annual Report on Form 20-F for the Year Ended December 31, 2014 2Genedata Biologics 5.0 – Antibody Engineering and Developability Assessment Advances 2Genedata Biologics 5.0 – Antibody Engineering and Developability Assessment Advances 3Genedata Biologics 5.0 – Antibody Engineering and Developability Assessment Advances 4Tocagen Presents Updated Interim Survival Data from Ongoing Clinical Studies at American Association of Neurological Surgeons (AANS)/Congress of Neurological Surgeons (CNS) Section on Tumors 2Tocagen Presents Updated Interim Survival Data from Ongoing Clinical Studies at American Association of Neurological Surgeons (AANS)/Congress of Neurological Surgeons (CNS) Section on Tumors 3Tocagen Presents Updated Interim Survival Data from Ongoing Clinical Studies at American Association of Neurological Surgeons (AANS)/Congress of Neurological Surgeons (CNS) Section on Tumors 4Tocagen Presents Updated Interim Survival Data from Ongoing Clinical Studies at American Association of Neurological Surgeons (AANS)/Congress of Neurological Surgeons (CNS) Section on Tumors 5OncoTAb CSO Awarded the University of North Carolina’s O. Max Gardner Award 2
... Forest Laboratories, Inc.,(NYSE: FRX ), an ... its Fiscal 2009 Second Quarter financial results,before the ... 2008. Later that,day, at 10:00 AM EDT, Forest ... President and Chief Operating Officer and Frank Perier, ...
... (OTC,Bulletin Board: SCIE), a San Diego-based medical device ... WavSTAT(R) Optical Biopsy,System to the University of Southern ... Biopsy System as an adjunctive tool to improve,clinical ... esophagus.,This marks the final phase of a study ...
... October 1 Excalibur, the international,investment house specialising ... be achieved in the UK biotech sector,despite the ... Professor Sir Christopher Evans and a development,of Merlin ... York Pharma plc, the specialist dermatology company, to ...
Cached Biology Technology:Forest Laboratories, Inc. Sets Date and Conference Call for Fiscal 2009 Second Quarter Earnings 2University of Southern California Receives Cancer Diagnosis System for Detecting Esophageal Dysplasia 2University of Southern California Receives Cancer Diagnosis System for Detecting Esophageal Dysplasia 3University of Southern California Receives Cancer Diagnosis System for Detecting Esophageal Dysplasia 4Excalibur - 'Transforming' Biotech Deals can Still be Achieved 2
Request Info...
Request Info...
CoverWell imaging chamber gasket with adhesive, one chamber, 20 mm diameter, 1.0 mm deep *set of 40* Cell Biology Imaging Tools and Accessories Microscope Slide Accessories...
Request Info...
Biology Products: