Navigation Links
Whale population size, dynamics determined based on ancient DNA
Date:5/11/2012

Estimates of whale population size based on genetics versus historical records diverge greatly, making it difficult to fully understand the ecological implications of the large-scale commercial whaling of the 19th and early 20th centuries, but a comparison of DNA samples from modern and prehistoric gray whales supports the idea that the population was substantially larger pre-whaling and saw a sharp, recent decrease that is consistent with whaling as the cause. The full results are reported May 9 in the open access journal PLoS ONE.

Previous estimates of pre-whaling population size in gray whales using historic records and census modeling suggest there used to be about 15,000 to 35,500 eastern Pacific gray whales. In contrast, estimates from genetic data suggest a much higher original population size of about 78,000 to 116,000 individuals. This discrepancy, though, could be explained by a pre-whaling decrease in population. The authors of the current study, led by Elizabeth Alter of City University of New York (York College), set out to test this hypothesis.

They isolated DNA from whale bones excavated from archaeological sites, ranging from about 150 to 2,500 years old. By comparing these sequences with sequences from modern whales, they determined that a severe decline in whale population occurred recently, suggesting that the original population size was indeed larger than estimated based on historical record and arguing against population decline caused by any pre-whaling forces.

"Retrieving DNA from ancient whales allows more direct insights into their population histories than using modern DNA alone. In this case, we were able to look at pre-whaling specimens of gray whales, and found that the genetic data are consistent with a sharp and recent bottleneck -- very likely the result of commercial whaling. As methods for retrieval and analysis of ancient DNA improve, we'll be able to increasingly refine population histories
'/>"/>

Contact: Jennifer Laloup
jlaloup@plos.org
415-624-1220
Public Library of Science
Source:Eurekalert

Page: 1 2

Related biology news :

1. University professor stresses links between US Navy sonar and whale strandings
2. UBC researcher reveals humpback whales dining habits -- and costs
3. American Library Association names NJIT prof’s Whale Music book a top ten
4. High numbers of right whales seen in Gulf of Maine
5. Early whales gave birth on land, fossil find reveals
6. Older killer whales make the best mothers
7. Early whales gave birth on land
8. Mama whales teach babies where to eat
9. Right whale sedation enables disentanglement effort
10. UIC biologists use DNA to study migration of threatened whale sharks
11. NOAA researchers: Blue whales re-establishing former migration patterns
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:2/19/2015)... .19, 2015 Research and Markets ... the "Military Electro-Optical / Infrared Systems Market ... Platform - Forecast to 2020" report to ... systems market is expected to reach $16.35 billion ... This report segments the military electro-optical/infrared ...
(Date:2/11/2015)... , February 11, 2015 ... report "Access Control Market by Product (Cards and Readers, ... Military and Defense, Government, Industrial, Healthcare, Education) and By ... by MarketsandMarkets, the Access Control Market is ... growing at a CAGR of 10.6% between ...
(Date:2/5/2015)... , Jan. 26, 2015   Epic Sciences , ... cancer, today announced that Murali Prahalad , Ph.D., president ... Medicine World Conference (PMWC) 2015: Silicon Valley, which is ... Mountain View, Calif. on January 26-28, 2015. ... Come of Age as Biomarkers." Last year, Epic Sciences was ...
Breaking Biology News(10 mins):Military Electro-Optical / Infrared Systems (Image Intensification, Laser, Infrared) Market - Forecast to 2020: Featuring Profiles of the Market Leaders on this $16 Billion market 2Military Electro-Optical / Infrared Systems (Image Intensification, Laser, Infrared) Market - Forecast to 2020: Featuring Profiles of the Market Leaders on this $16 Billion market 3Access Control Market Worth $10.4 Billion by 2020 2Access Control Market Worth $10.4 Billion by 2020 3Access Control Market Worth $10.4 Billion by 2020 4Epic Sciences to Present at Personalized Medicine World Conference 2015 on the Use of Circulating Tumor Cells as Cancer Biomarkers 2
... molecular events in the origin of fat cells. The ... obesity and diabetes, as fat cells produce hormones critical ... finds that a hormonal cocktail routinely used in the ... from fat-cell precursors to full-blown fat, researchers at University ...
... have used a glowing protein from fireflies to observe ... target for new drugs to treat cancer, autoimmune diseases ... as IKK (for IKappa kinase), regulates processes that can ... these changes to many different disorders. , "Our new ...
... the United States in 2001 the threat of a ... smallpox, plague or tularemia -- became very real. But ... contain an attack is still being developed. , In ... Quantum Devices have demonstrated solar-blind avalanche photodiodes (APDs) that ...
Cached Biology News:Short-term Bio Sensors Monitor From Afar 2Firefly protein lets researchers monitor molecule linked to cancer 2Firefly protein lets researchers monitor molecule linked to cancer 3Tiny avalanche photodiodes target bioterrorism agents 2
(Date:3/6/2015)... 2015  Attorney Advertising-- Bronstein, Gewirtz & Grossman, LLC ... of the securities of Orexigen Therapeutics, Inc. ("Orexigen" ... -News).  Such investors are advised to contact ... Eitan Kimelman at info@bgandg.com ... Orexigen and certain of its officers and/or directors ...
(Date:3/6/2015)... DIEGO , March 6, 2015   Senomyx ... company using proprietary taste science technologies to discover, develop, ... and flavor industries, announced today that John Poyhonen , ... Tony Rogers , Senior Vice President and Chief Financial ... programs, currently scheduled for Wednesday, March 11, at 2:00 ...
(Date:3/6/2015)... , March 6, 2015   BioLife Solutions , ... manufacturer and marketer of proprietary clinical grade hypothermic ... precision thermal shipping products for cells and ... fourth quarter and full year 2014 financial results will be ... Company will host a conference call and live webcast ...
(Date:3/5/2015)... -- Twelve patients today are preparing to participate in a ... Pacific Medical Center (CPMC), a Sutter Health affiliate. ... the largest single-center kidney paired donation chain conducted on ... 44-year history of the CPMC Transplant Center. The two-day ... donor who did not have a specific recipient in ...
Breaking Biology Technology:SHAREHOLDER ALERT: Bronstein, Gewirtz & Grossman, LLC Announces Investigation of Orexigen Therapeutics, Inc. 2SENOMYX TO WEBCAST CORPORATE PRESENTATION AT THE THE 27TH ANNUAL ROTH CONFERENCE 2BioLife Solutions to Report Fourth Quarter and Full Year 2014 Financial Results and Provide Business Update on March 12, 2015 2Altruistic donor starts large West Coast single-center kidney paired donation at CPMC 2Altruistic donor starts large West Coast single-center kidney paired donation at CPMC 3Altruistic donor starts large West Coast single-center kidney paired donation at CPMC 4
... BioCrossroads today announced the receipt of a two-year ... will fund a range of charitable, educational and scientific ... Indiana,s signature strengths in the life sciences. ... 2012, we recognize that Lilly Endowment,s significant investment in ...
... 5, 2011 ZyGEM Corp. Ltd., a developer and ... and other nucleic acids, today announced publication of an ... kit can rapidly extract DNA from small samples of ... produce accurate, reliable and reproducible DNA profiles for forensic ...
... golf clubs, developed by scientists, regularly catch the eye ... McIlroy get excited this time, this new golf putter ... The ,micro putter, developed in a study published today, ... and Technology, has been designed to test the "stickiness" ...
Cached Biology Technology:Two-year $2.8 million Grant from Lilly Endowment Fuels BioCrossroads' Charitable, Educational and Scientific Mission 2Two-year $2.8 million Grant from Lilly Endowment Fuels BioCrossroads' Charitable, Educational and Scientific Mission 3Application Note Shows ZyGEM's forensicGEM® Tissue Facilitates Forensic Casework by Rapidly and Reproducibly Extracting DNA From Human Hair 2Application Note Shows ZyGEM's forensicGEM® Tissue Facilitates Forensic Casework by Rapidly and Reproducibly Extracting DNA From Human Hair 3Scientists take up golf to prove long-standing theory of cell stickiness 2
Goat polyclonal to Sarcosine Oxidase ( Abpromise for all tested applications). Antigen: Microbial Sarcosine Oxidase. Entrez Gene ID: 51268 Swiss Protein ID: Q6IAJ9...
Rabbit polyclonal to FANCE ( Abpromise for all tested applications). entrezGeneID: 2178 SwissProtID: Q9HB96...
...
sTNF-receptor I Polyclonal Antibody 100 ug affinity purified rabbit anti-human sTNF-receptor I polyclonal antibody. Performs well in WB/Elisa/Neutralization....
Biology Products: