Navigation Links
DNA analysis reveals rapid population shift among Pleistocene cave bears

Studying DNA obtained from teeth of ancient cave bears, researchers have been able to identify a shift in a particular population of the bears inhabiting a European valley in the late Pleistocene era. The findings illustrate the ability of DNA sequence analysis to reveal aspects of animal population dynamics in the distant past and potentially illuminate the influence of human migrations in animal population changes. The new work, reported by a collaborative group of researchers including Michael Hofreiter of the Max Planck Institute for Evolutionary Anthropology in Leipzig, Germany, appears in the February 20th issue of the journal Current Biology, published by Cell Press.

To investigate the stability of ancient cave bear populations over time, the researchers obtained DNA samples from 29 cave bear teeth from three geographically close caves in the Ach Valley, near the Danube River in modern-day southern Germany. Twenty of the teeth ultimately provided useful mitochondrial DNA sequence (mitochondrial DNA is especially useful for tracking population changes). The findings indicated that while four sequence types (known as haplotypes) corresponded to bears 28,000 to 38,000 years old, a fifth DNA haplotype was found only in bears that were 28,000 years old or younger. These data suggested that what had been a stable, long-established cave bear population became disrupted around 28,000 years ago and was replaced by a new, genetically distinct cave bear group.

The timing of the disruption appears to roughly coincide with the arrival of modern humans in the Ach Valley, thought to have occurred by 32,000 years ago. The researchers suggest that human influence in the form of hunting and competition for sheltering caves may represent a plausible explanation for the disruption in the cave bear population, creating an opportunity for the infiltration by a neighboring cave bear group. The authors note that though the new bears successfully colonized the Ach Va lley for a time, they endured only another 2,000 years before becoming extinct in the region.


'"/>

Source:Cell Press


Related biology news :

1. GATA: a graphic alignment tool for comparative sequence analysis
2. Global analysis of membrane proteins
3. Doctors closer to using gene analysis to help trauma patients
4. Agilent Technologies new genome analysis technology set to accelerate Australia fight against mesothelioma
5. New miniaturised chip dramatically reduces time taken for DNA analysis
6. Researchers develop promising new gene network analysis method
7. New technique may speed DNA analysis
8. Locusts built-in surface analysis ability directs them to fly overland
9. NASA satellite data provides rapid analysis of Amazon deforestation
10. NCAR analysis shows widespread pollution from 2004 wildfires
11. Genetic analysis of cavefish reveals more about evolution
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:6/9/2016)... ISTANBUL , June 9, 2016  Perkotek an innovation leader in attendance control ... to seamlessly log work hours, for employers to make sure the right employees are ... Logo - http://photos.prnewswire.com/prnh/20160609/377486LOGO ... ... ...
(Date:6/2/2016)... 2016 The Department of Transport Management ... 44 million US Dollar project, for the , ... Personalization, Enrolment, and IT Infrastructure , to ... and implementation of Identity Management Solutions. Numerous renowned international vendors ... Decatur was selected for the most compliant and ...
(Date:5/24/2016)... 2016 Ampronix facilitates superior patient care by providing unparalleled technology to leaders ... is the latest premium product recently added to the range of products distributed by ... ... ... LCD Medical Display- Ampronix News ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... June 23, 2016 ... 2016;12(1):22-8 http://doi.org/10.17925/OHR.2016.12.01.22 Published recently ... peer-reviewed journal from touchONCOLOGY, Andrew D Zelenetz ... of cancer care is placing an increasing burden ... expensive biologic therapies. With the patents on many ...
(Date:6/23/2016)... ... June 23, 2016 , ... ... line of intelligent tools designed, tuned and optimized exclusively for Okuma CNC machining ... Chicago. The result of a collaboration among several companies with expertise in toolholding, ...
(Date:6/22/2016)... DUBLIN , June 22, 2016 Research ... and Global Markets" report to their offering. ... $39.4 billion in 2014 from $29.3 billion in 2013. The market ... (CAGR) of 13.8% from 2015 to 2020, increasing from $50.6 billion ... and projected product forecasts during the forecast period (2015 to 2020) ...
(Date:6/22/2016)... SAN DIEGO , June 22, 2016   ... the first pluripotent stem cell-derived islet replacement therapy for ... two presentations at ISSCR 2016 Annual Meeting.  ISSCR 2016, ... 22nd to 25th at Moscone West in San Francisco.  ... Details of the presentations are as follows:Event: , Focus ...
Breaking Biology Technology: