Navigation Links
Graduate student makes major discovery about seal evolution
Date:2/19/2014

Ottawa, February, 19, 2014In the world of science, one of the most exciting things a researcher can do is pin down an answer to a widely asked question. This experience came early for Carleton University graduate Thomas Cullen, who made a discovery about pinnipedsthe suborder that makes up seals, sea lions and walruseswhile doing research for his Master's degree under the supervision of Canadian Museum of Nature palaeontologist Dr. Natalia Rybczynski.

His discovery, published the journal Evolution, relates to sexual dimorphism (a large variance in size between males and females), in a variety of pinniped species. Males in many species of pinnipeds are often much larger than their female counterparts, in some cases more than twice as large, and this has implications for how they mate and behave.

Dimorphic pinnipeds such as the Steller's Sea Lion and Northern Fur Seal typically mate in a harem, with one male pinniped presiding over a larger community of female mates. This behaviour is not typically seen in non-dimorphic pinnipeds such as the Ringed Seal, and so sexual dimorphism is intimately linked with mating style.

Researchers have long puzzled over both why sexual dimorphism exists in many pinniped species and when this trait evolved. When Cullen examined fossils of an extinct pinniped with Rybczynski, he discovered an incontrovertible answer to the question of when. He was able to examine it there before analyzing the data at Carleton in a lab headed by his other thesis supervisor, Prof. Claudia Schrder-Adams.

"We were examining a fossil of a pinniped that was previously thought to be a juvenile, but we looked at it again and found that, based on its skull structure, it was likely an adult," says Cullen. This discovery, coupled with analyses comparing this fossil to others of the same species as well as modern dimorphic species, proved that the fossil belonged to a sexually dimorphic species.

The foss
'/>"/>

Contact: Dan Smythe
dsmythe@mus-nature.ca
613-566-4781
Canadian Museum of Nature
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. 11 undergraduates win travel awards to present research at fruit fly conference
2. New ASCB Kaluza Prize recognizes graduate student research
3. Wayne State welcomes undergraduates from around the US for physics research experience
4. Undergraduate travel grant awardees present research at fly conference
5. Graduate student video on sequestration wins prize
6. UC Riverside receives 3 grants to assist graduate students in pursuing doctoral degrees
7. NIBIB and HHMI announce graduate biomedical training awards
8. NSBRI renews space life sciences graduate programs at MIT, Texas A&M
9. UC Riverside graduate student awarded Guru Gobind Singh Fellowship
10. Grant to allow graduate students to research water quantity and quality improvement
11. Undergraduate Student Summer Research Award recipients announced for the 2012 FASEB MARC summer research opportunity program
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Graduate student makes major discovery about seal evolution
(Date:3/10/2015)...  Continuing its 167-year history of offering the Best, ... The Eye Scanning Password Authenticator , a device that ... websites or sensitive data. Employing the same ... the device has a small camera that scans and ... converting them into an encrypted ID that cannot be ...
(Date:3/10/2015)... --  Tute Genomics , pioneer in affordable, accurate and ... company PrimBio Research Institute to be its ... interpretation. PrimBio, a certified Life Technologies Ampliseq ... to support the work of experts on the front ... of exome sequencing services: 1) Targeted Exome and 2) ...
(Date:3/5/2015)... 2015 In Brazil , cloud ... using these solutions and 42 percent planning to invest in ... 25 percent of the companies will be investing in these ... of companies in the region are currently opting for the ... will command significant attention in the coming years. This trend ...
Breaking Biology News(10 mins):Hammacher Schlemmer Introduces The Eye Scanning Password Authenticator 2PrimBio Research Selects Tute as Whole Exome Analysis Provider, Creating Integrated, End-to-End Solution for Next-Generation Sequencing & Data Analysis 2PrimBio Research Selects Tute as Whole Exome Analysis Provider, Creating Integrated, End-to-End Solution for Next-Generation Sequencing & Data Analysis 3Two of Every Three Brazilian Companies will have Invested in Cloud by 2015, Finds Frost & Sullivan 2Two of Every Three Brazilian Companies will have Invested in Cloud by 2015, Finds Frost & Sullivan 3Two of Every Three Brazilian Companies will have Invested in Cloud by 2015, Finds Frost & Sullivan 4
... A new unique work published by Springer, the ... influence of complexity and system science to a much ... In eleven volumes, available in print and electronically, it ... the concepts of complexity theory together with the tools ...
... 20 years, Frank Bayliss, mentoring work has made San Francisco ... in the sciences. For his efforts, Bayliss has been awarded ... Mentoring. Bayliss will officially receive the award during a reception ... already been teaching biology at SF State for nearly two ...
... rapidly to climate and habitat change and established a ... grounds, according to new research. An international research ... from the US, South Africa and Italy, led by ... Biomedical Sciences, Durham University, found that when the Antarctic ...
Cached Biology News:A complete view of complexity in science and society in a new authoritative reference work 2SF State professor honored by President Obama for science mentoring 2Seals quickly respond to gain and loss of habitat under climate change 2Seals quickly respond to gain and loss of habitat under climate change 3
(Date:3/29/2015)... , March 29, 2015  Caris Life ... in which Caris Molecular Intelligence®, the company,s panomic, ... and differences between several rare and difficult to ... that have the potential to improve patient outcomes. ... B at the Society of Gynecologic Oncology (SGO) ...
(Date:3/27/2015)... The consumption of compound fertilizers (NPK) ... and high prices in 2008. However, the situation has ... on gaining momentum now. , To date, the world ... 100,000 thousand tonnes. No considerable growth was registered in ... rocketed during 2012-2013, registering 11% growth as against the ...
(Date:3/27/2015)... Working in collaboration with the National Amyloidosis Centre at ... Richmond Pharmacology is the first centre worldwide to dose a ... RNAi therapeutic being developed for the treatment of transthyretin-mediated amyloidosis ... Read press release ClinicalTrials.gov ... University of London , Richmond Pharmacology is ...
(Date:3/26/2015)... (PRWEB) March 26, 2015 PRC Clinical, ... announced today several management and executive appointments effective immediately. ... Financial Officer (CFO) and member of the Board of ... Business Operations, and Sue Dowden will assume the position ... and current Chief Operations Officer (COO), has been appointed ...
Breaking Biology Technology:Caris Molecular Intelligence Facilitates Comparison of Biomarker Profiles to Inform Targeted Treatment Strategies in Distinct Gynecological Cancers 2Caris Molecular Intelligence Facilitates Comparison of Biomarker Profiles to Inform Targeted Treatment Strategies in Distinct Gynecological Cancers 3Caris Molecular Intelligence Facilitates Comparison of Biomarker Profiles to Inform Targeted Treatment Strategies in Distinct Gynecological Cancers 4World NPK Fertilizers Market Keeps On Gaining Momentum, According to BAC Reports Study Available at MarketPublishers.com 2World NPK Fertilizers Market Keeps On Gaining Momentum, According to BAC Reports Study Available at MarketPublishers.com 3PRC Clinical Announces Key Management Appointments and Launches East Coast Operations 2PRC Clinical Announces Key Management Appointments and Launches East Coast Operations 3
... did you get involved with computers and Internet programming? Is ... , Jason May: My first experience with computers was ... 1. I discovered e-mail, Usenet and the fledgling Internet when ... changes since then, but I find computers, programming and the ...
... May 2 issue of the journal Science, could help mitigate ... under solid furniture, evacuate buildings, divert aircraft, stop trains, shut ... machinery and chemicals. , ,The system is based on ... deployed in southern California. , ,"An early warning system ...
... Company recently expressed concern to Department of Health and ... impede clinical research trials. , ,Institutional review boards are ... patient authorizations for use and disclosure of information, according ... of Indianapolis-based Eli Lilly. , ,In a response ...
Cached Biology Technology:Interview: Billpoint Founder Jason May on eBay, Open Source 2Interview: Billpoint Founder Jason May on eBay, Open Source 3Interview: Billpoint Founder Jason May on eBay, Open Source 4Wisconsin Researcher Co-Develops Earthquake Alarm 2Wisconsin Researcher Co-Develops Earthquake Alarm 3Wisconsin Researcher Co-Develops Earthquake Alarm 4
The FliTrx Panning Kit is designed to simplify panning for protein-protein interactions with the FliTrx Random Peptide Display Library or the pFliTrx Peptide Display Vector....
... ISO 9001:2000 Certified USDA Research Registered OLAW ... Training AALAS Certified Technicians ... GLP Documentation Upon Request Focus ... for all your custom immunology service needs. ...
...
Applications: Western blotting ...
Biology Products: