Navigation Links
Research reveals New Zealand sea lion is a relative newcomer
Date:5/14/2014

The modern New Zealand sea lion is a relative newcomer to our mainland, replacing a now-extinct, unique prehistoric New Zealand sea-lion that once lived here, according to a new study.

A team of biologists from New Zealand's University of Otago estimates that this prehistoric mainland sea-lion population became extinct as recently as 600 years ago, and was then replaced by a lineage previously limited to the waters of the cold subantarctic.

The Marsden-funded study, carried out by Otago Zoology PhD student Catherine Collins, and led by Professor Jon Waters, set out to investigate changes in the New Zealand sea-lion population since human settlement.

Ms Collins says they were startled to identify a previously unknown sea-lion lineage that dominated South Island shores until just a few hundred years ago.

"It is estimated that the mainland sea-lions became extinct between 1300 and 1500AD, soon after Polynesian settlement, and midden remains suggest they were hunted extensively. The extinction apparently created an opportunity for the subantarctic lineage to colonize New Zealand's mainland," she says.

The team identified the extinct mainland sea-lion lineage using ancient DNA from prehistoric bones.

"We found that the extinct mainland population was clearly genetically distinct from the modern subantarctic population that arrived more recently," she says.

The unexpected finding closely mirrors a prehistoric extinction-replacement event for yellow-eyed penguins, recently detected by the same team led by Professor Waters.

"Our findings demonstrate that our current sea-lion population is not a declining remnant of an original mainland population, but rather represents a new arrival from the subantarctic," he says.

"Competition between the two lineages may have previously prevented the subantarctic lineage from expanding northwards to the mainland of New Zealand."

Professor Waters
'/>"/>

Contact: Dr. Catherine Collins
catherine.collins01@gmail.com
University of Otago
Source:Eurekalert

Page: 1 2

Related biology news :

1. Study by UC Santa Barbara researchers suggests that bacteria communicate by touch
2. Research reveals first evidence of hunting by prehistoric Ohioans
3. Diabetes Research Institute develops oxygen-generating biomaterial
4. APS issues new policy requiring identification of sex or gender in reporting scientific research
5. UC Santa Barbara researchers discover genetic link between visual pathways of hydras and humans
6. Study jointly led by UCSB researcher supports theory of extraterrestrial impact
7. U of Alberta researcher steps closer to understand autoimmune diseases
8. Research on flavanols and procyanidins provides new insights into how these phytonutrients may positively impact human health
9. A project to research biological and chemical aspects of microalgae to fuel approach
10. Scripps Research discoveries lead to newly approved drug for infant respiratory distress syndrome
11. Researchers attempt to solve problems of antibiotic resistance and bee deaths in one
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:9/18/2014)... New research into the Crimean-Congo hemorrhagic fever virus ... disease in humans similar to that caused by Ebolavirus, ... This discovery has the potential to lead to novel ... , The research, reported in a paper published today ... by scientists at the Texas Biomedical Research Institute and ...
(Date:9/18/2014)... starts a "frequent flyers" program, fruit flies surely would ... has hosted increasing numbers of fruit fly research studies. ... in April, and another is scheduled launch to the ... launch in December. , Fruit flies are biomedical research ... space. Model organisms can reveal the basis for health ...
(Date:9/18/2014)... creatively manipulate spoken language is unique to humans. "The ... years of human evolution to make this possible are ... we now have," says Wolfgang Enard, Professor of Anthropology ... understand the molecular biological basis of language Enard has ... his latest study, undertaken in collaboration with scientists at ...
Breaking Biology News(10 mins):Research milestone in CCHF virus could help identify new treatments 2Buzzing with activity: Fruit flies orbit Earth for science 2Buzzing with activity: Fruit flies orbit Earth for science 3Buzzing with activity: Fruit flies orbit Earth for science 4Language evolution: Quicker on the uptake 2Language evolution: Quicker on the uptake 3
... ants it's a way of life! Scientists at the University ... how to visually judge the height of horizontal barriers so ... Tobias Seidl will be presenting his latest research findings at ... Tuesday 4th April. , Desert ants generally scurry around at ...
... pups whose blubber falls below average levels may be at ... they get enough fat in their diets later on, according ... and presented at Experimental Biology 2006. , The study found ... the wild continued to gain weight and grow regardless of ...
... recently discovered cytokine to neural stem cells derived from ... Neurosurgical Institute have developed a tool to track and ... against their return. , Results of an animal study ... Cancer Research, and the researchers are now applying to ...
Cached Biology News:Alaska seal pup diet may hold key to decline of population 2Alaska seal pup diet may hold key to decline of population 3Alaska seal pup diet may hold key to decline of population 4Marrow-derived stem cells deliver new cytokine to kill brain tumor cells, offer protection 2Marrow-derived stem cells deliver new cytokine to kill brain tumor cells, offer protection 3
(Date:9/18/2014)... SAN DIEGO , Sept. 18, 2014  MEI Pharma, ... on the clinical development of novel therapies for cancer, announced ... Chief Executive Officer, will present at BioCentury,s NewsMakers in ... at 8:30 a.m. Eastern time from the Millennium Broadway Hotel ... A live webcast of the presentation can be accessed at ...
(Date:9/18/2014)... Oncothyreon Inc. (NASDAQ: ONTY ) today announced ... offerings of 10,000,000 shares of its Common Stock at ... for expected gross proceeds of $20 million and 10,000 ... a price to the public of $2,000.00 per share, ... of Series A Convertible Preferred Stock is non-voting and ...
(Date:9/18/2014)... , Sept. 18, 2014   Sigma-Aldrich ... today it has entered into a new gene ... Medical School,s Vector Core. Under the partnership, Sigma-Aldrich ... technology, experimental design consultation, and dedicated gene editing ... accelerate gene editing-based research at the U-M Medical ...
(Date:9/18/2014)... September 18, 2014 SeqLL Inc., ... (tSMS™) technology, announced today the closing of a ... led by Genomic Diagnostic Technologies, will increase the ... applications. , Founded in March 2013 by Daniel ... Analyst at Helicos BioSciences, SeqLL has continued to ...
Breaking Biology Technology:MEI Pharma To Present At BioCentury's NewsMakers Conference 2MEI Pharma To Present At BioCentury's NewsMakers Conference 3Oncothyreon Prices $40 Million Concurrent Public Offerings of Common Stock and Preferred Stock 2Oncothyreon Prices $40 Million Concurrent Public Offerings of Common Stock and Preferred Stock 3Sigma-Aldrich, University of Michigan Medical School Establish CRISPR Core Lab Partnership 2Sigma-Aldrich, University of Michigan Medical School Establish CRISPR Core Lab Partnership 3Sigma-Aldrich, University of Michigan Medical School Establish CRISPR Core Lab Partnership 4SeqLL Closes Series-A Funding Round for Expansion of Single Molecule Sequencing 2
... toward large-scale production -SWIFTWATER, Pa. and LYON, France, May ... sanofi-aventis Group (EURONEXT: SAN and NYSE: SNY ... A(H1N1) seed virus, enabling the world,s leading manufacturer of ... A(H1N1) vaccine. The emergence of a new influenza A(H1N1) ...
... CA, May 27, 2009 Senomyx, Inc. (Nasdaq: ... proprietary technologies to discover and develop novel flavor ingredients ... today the appointment of David L. Linemeyer, Ph.D., to ... than 20 years of experience in directing biology research ...
... atherosclerosis vaccine,development program by AFFiRiS AG is receiving ... project is being carried out in,cooperation with German ... is to increase the amount of "good" high ... reduce the occurrence of,harmful fatty deposits in the ...
Cached Biology Technology:Sanofi Pasteur Receives Seed Virus to Produce New Influenza A(H1N1) Vaccine 2Sanofi Pasteur Receives Seed Virus to Produce New Influenza A(H1N1) Vaccine 3SENOMYX ANNOUNCES APPOINTMENT OF DAVID L. LINEMEYER, PH.D., AS VICE PRESIDENT, BIOLOGY 2SENOMYX ANNOUNCES APPOINTMENT OF DAVID L. LINEMEYER, PH.D., AS VICE PRESIDENT, BIOLOGY 3AFFiRiS AG: Atherosclerosis Vaccine Development Receives EU Support 2AFFiRiS AG: Atherosclerosis Vaccine Development Receives EU Support 3