Genetic Archaeology
Recent News |  Archives |  Tags |  About |  Newsletter |  Submit News |  Links |  Subscribe to GeneticArchaeology.com RSS Fee Subscribe


More Articles
The electric slide dance of DNA knotsThe electric slide dance of DNA knots

Size and age of plants impact their productivity more than climate, study showsSize and age of plants impact their productivity more than climate, study shows

The development of blood-retinal barrier during astrocyte/vascular wall cell interactionThe development of blood-retinal barrier during astrocyte/vascular wall cell interaction

Bacteria manipulate salt to build shelters to hibernateBacteria manipulate salt to build shelters to hibernate

It takes two to courtIt takes two to court

Magnets for fusion energy: A revolutionary manufacturing method developedMagnets for fusion energy: A revolutionary manufacturing method developed

Breakthrough laser experiment reveals liquid-like motion of atoms in an ultra-cold clusterBreakthrough laser experiment reveals liquid-like motion of atoms in an ultra-cold cluster

A crystal wedding in the nanocosmosA crystal wedding in the nanocosmos

Has Antarctic sea ice expansion been overestimated?Has Antarctic sea ice expansion been overestimated?

Enhanced instrument enables high-speed chemical imaging of tissuesEnhanced instrument enables high-speed chemical imaging of tissues

Lunar pits could shelter astronauts, reveal details of how 'man in the moon' formedLunar pits could shelter astronauts, reveal details of how 'man in the moon' formed

New research: When it hurts to think we were made for each otherNew research: When it hurts to think we were made for each other

Law of physics governs airplane evolutionLaw of physics governs airplane evolution

The economic territory of Upper Palaeolithic groups is specified by flintThe economic territory of Upper Palaeolithic groups is specified by flint

Running for life: How speed restricts evolutionary change of the vertebral columnRunning for life: How speed restricts evolutionary change of the vertebral column

Brain waves show learning to read does not end in 4th grade, contrary to popular theory

Getting a grip on robotic graspGetting a grip on robotic grasp

The bend in the Appalachian mountain chain is finally explainedThe bend in the Appalachian mountain chain is finally explained

Cooperation among humans, a question of ageCooperation among humans, a question of age

Protein's 'hands' enable bacteria to establish infection, research findsProtein's 'hands' enable bacteria to establish infection, research finds

Less exercise, not more calories, responsible for expanding waistlinesLess exercise, not more calories, responsible for expanding waistlines

High earners in a stock market game have brain patterns that can predict market bubblesHigh earners in a stock market game have brain patterns that can predict market bubbles

A healthy lifestyle adds years to lifeA healthy lifestyle adds years to life

Platonic solids generate their 4-dimensional analoguesPlatonic solids generate their 4-dimensional analogues

Study of animal urination could lead to better-engineered productsStudy of animal urination could lead to better-engineered products

Do probiotics help kids with stomach bugs?Do probiotics help kids with stomach bugs?

Strict diet suspends development, doubles lifespan of wormsStrict diet suspends development, doubles lifespan of worms

Identified for the first time what kind of explosive has been used after the detonationIdentified for the first time what kind of explosive has been used after the detonation

Copied from nature: Detecting software errors via genetic algorithmsCopied from nature: Detecting software errors via genetic algorithms

Antarctic octopus sheds light on ice-sheet collapse (5/13/2012)

Tags:
octopus, cephalopods
The Antarctic octopus does not like to travel
The Antarctic octopus does not like to travel

Scientists at the University of Liverpool have found that genetic information on the Antarctic octopus supports studies indicating that the West Antarctic Ice Sheet could have collapsed during its history, possibly as recently as 200,000 years ago.

Genes from more than 450 Turquet's octopuses, collected from species in the Southern Ocean that surrounds Antarctica, were analyzed to shed new light on how animals disperse across the varied ocean landscape. Adult Turquet's octopuses tend to live in one place and only move to escape predators, leading scientists to believe that creatures from areas either side of Antarctica would be genetically different.

The team from Liverpool, in collaboration with National University of Ireland Galway, and La Trobe University, Australia, however, found that the octopuses from Ross and Weddell Seas, which are now separated by the West Antarctic Ice Sheet, are genetically almost identical, suggesting that these two regions may have once been connected. Findings may contribute to recent studies demonstrating the potential impact that increasing global temperatures could have on the changing Antarctica environment.

Dr Phill Watts, from the University's Institute of Integrative Biology, explains: "We looked at information gathered by the Census of Antarctic Marine Life, which allowed us to examine genetic data on a scale that had not been done before in this area of the world.We expected to find a marked difference between Turguet's octopuses living in different regions of the ocean, particularly between areas that are currently separated by approximately 10,000km of sea. These creatures don't like to travel and so breeding between the populations in the Ross and Weddell Seas would have been highly unusual.

"We found, however, that they were genetically similar, suggesting that at some point in their past these populations would have been in contact with each other, perhaps at a time when the oceans were connected and not separated by the West Antarctic Ice Sheet. These findings agree with climate models indicating repeated periods in history when the climate was warmer, which would have released water from the ice and increased the sea levels, allowing dispersal of creatures between the Ross and Weddell Seas."

Data on octopuses from other parts of Antarctica, not separated by this particular ice sheet, support the theory that the creatures are genetically different. They found that the depth of the ocean and its currents limited the movement of the octopus in certain areas, as would have been expected for those living on either side of the West Antarctic Ice sheet. This added further evidence that at some point in recent history this particular ice sheet might have collapsed.

The research is supported by the Natural Environment Research Council (NERC) and the collaborative scheme for systematic research (CoSyst). It is published in the journal Molecular Ecology.

Dr Louise Allcock, from the National University of Ireland Galway, added: "A previous study has shown evidence that the Ross and Weddell Seas could have been connected. We wanted to investigate whether there was any genetic information that could tell us what the past environment could have been like, and this octopus species, with its large populations around the region and limited movements, was an ideal species to use.

"The fact that we found more similarities than we did differences supports the theory that the West Antarctic Ice Sheet could have collapsed in the past. It also provides further evidence that scientists should continue to raise awareness about the impact of climate change on Antarctica today."

Note: This story has been adapted from a news release issued by the University of Liverpool

Post Comments:

Search

New Articles
Mixed genes mix up the migrations of hybrid birdsMixed genes mix up the migrations of hybrid birds

Ancient genetic material from caries bacterium obtained for the first timeAncient genetic material from caries bacterium obtained for the first time

Marmoset sequence sheds new light on primate biology and evolutionMarmoset sequence sheds new light on primate biology and evolution

Untangling spider's webs

Oetzi's 'non-human' DNA

Genome-wide analysis reveals genetic similarities among friends

A-maize-ing double life of a genome

Dodos and spotted green pigeons are descendants of an island hopping bird

Organismal biologists needed to interpret new trees of life

Biologists link sexual selection and placenta formationBiologists link sexual selection and placenta formation

Transgender algae reveal evolutionary origin of sexesTransgender algae reveal evolutionary origin of sexes

DNA of 'Evolution Canyon' fruit flies reveals drivers of evolutionary changeDNA of 'Evolution Canyon' fruit flies reveals drivers of evolutionary change

Hair from mummy's clothes provides insights into red deer lineage

Extinct human cousin gave Tibetans advantage at high elevationExtinct human cousin gave Tibetans advantage at high elevation

Genetic study reveals vulnerability of northwest dolphins



Archives
July 2014
June 2014
May 2014
April 2014
March 2014
February 2014
January 2014
December 2013
November 2013
October 2013
September 2013
August 2013
July 2013
June 2013
May 2013
April 2013
March 2013
February 2013
January 2013
December 2012
November 2012
October 2012
September 2012
August 2012
July 2012
June 2012
May 2012
April 2012
March 2012
February 2012
January 2012
December 2011
November 2011
October 2011
September 2011
August 2011
July 2011
June 2011
May 2011
April 2011
March 2011
February 2011
January 2011
December 2010
November 2010
October 2010
September 2010
August 2010
July 2010
June 2010
May 2010
April 2010
March 2010
February 2010
January 2010
December 2009
November 2009
October 2009
September 2009
August 2009
July 2009
June 2009
May 2009
April 2009
March 2009
February 2009
January 2009
December 2008
November 2008
October 2008
September 2008
August 2008
July 2008
June 2008
May 2008
April 2008
March 2008
February 2008
January 2008
December 2007
November 2007
October 2007
September 2007
August 2007
July 2007
June 2007
May 2007
April 2007
March 2007
February 2007
January 2007
November 2006
October 2006
September 2006
June 2005
October 2004
July 2001


Science Friends
Agricultural Science
Astronomy News
Biology News
Biomimicry Science
Cognitive Research
Chemistry News
Tissue Engineering
Cancer Research
Cybernetics Research
Electonics Research
Forensics Report
Fossil News
Genetics News
Geology News
Microbiology Research
Nanotech News
Parenting News
Physics News


  Archives |  Submit News |  Advertise With Us |  Contact Us |  Links
Use of this site constitutes acceptance of our Terms of Service and Privacy Policy. All contents © 2000 - 2015 Web Doodle, LLC. All rights reserved.