Navigation Links
Iowa State University researcher's work on gender, temperature link in reptiles published in Nature
Date:1/22/2008

AMES, Iowa An Iowa State University researcher who spent four years in Australia studying reptiles is having his findings published in the journal Nature this week.

Nature is an international, peer-reviewed, interdisciplinary journal of science, and is the most-cited weekly science journal in the world.

Dan Warner, a researcher in the ecology, evolution and organismal biology department, has been working with the jacky dragon, a lizard found in Australia, to discover if egg incubation temperature and gender affects the viability of the lizards.

In mammals, gender is determined by the chromosomes an embryo inherits from the father -- Y dictates the offspring will be male, X means female. The mother always contributes an X chromosome.

In some species of reptiles, the gender of the offspring is determined by the temperature the embryos experience during development.

Warners research explored whether the temperatures at which the lizards were born was the best climate for each of the two genders.

This was a hypothesis that was proposed in 1977, said Warner. But no one had conducted a complete experimental test of the hypothesis until now.

Warner tracked males and females born at different temperatures and measured how well they reproduced. Because some temperatures only produce one gender, Warner had to reverse the sex of some of the embryos using hormones.

In the jacky dragon, males were born at around 77 to 86 degrees, while females were born at temperatures both above and below that range.

Warner found that jacky dragons, both male and female, thrive when they are born at the right temperatures for their gender.

Males reproduce more when they are exposed to the right egg incubation temperatures for them, 25 to 30 degrees Celsius (77-86 F), said Warner. The same is true for females when born at their ideal temperatures.

The studys findings may have grave consequences for the
'/>"/>

Contact: Dan Warner
dwarner@iastate.edu
515-294-1968
Iowa State University
Source:Eurekalert

Page: 1 2

Related medicine news :

1. Combination therapy improves survival for certain prostate cancer patients
2. Hormone Therapy Only Helps Some Older Men With Prostate Cancer
3. Pros, cons of drug proven to prevent prostate cancer should be considered, researchers recommend
4. Mislabeled Supplement Spurred Prostate Cancer: Report
5. Statehouse Atrium to be Site for Childrens Dental Access Event - Ohio Legislators to Mingle With Children and Dentists for This Free Care Event!
6. Mislabled Supplement Spurred Prostate Cancer: Report
7. Enlarged Prostate Treatment Study Shows Combination of AVODART(R) and Tamsulosin Provides Greater Benefit Than Either Medication Alone
8. Bradley Pharmaceuticals Announces Filing of Definitive Proxy Statement for Special Meeting of Stockholders to Approve Merger With Nycomed
9. Susan G. Komen for the Cure, State Lawmakers, Breast Cancer Survivors, Celebrities and Activists Call on Legislature to Strengthen Breast Cancer Screening Program for Underserved Women
10. States Patient Safety Report a Valuable Tool For Hospitals Quality Improvement Work
11. Just hours apart, 2 brothers undergo robotic prostate cancer surgery
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/31/2015)... ... 2015 , ... India Network Foundation, a non-profit US-based sponsor ... summarizes all available plans, plan maximums, pre-existing condition coverage limits and deductible in ... Network members make an informed decision regarding the care they want for their ...
(Date:8/31/2015)... ... August 31, 2015 , ... Women’s Excellence ... is unique to the Lake Orion area. This program is one of the ... WEmovestrong’s weight management program will incorporate group fitness and nutritional consultations to help ...
(Date:8/31/2015)... ... August 31, 2015 , ... CareSource, a ... Corporate Communications. In this capacity, Michael will provide strategic leadership for CareSource’s marketing, ... in consumer-focused programs that have contributed to the company’s rapid growth. As the ...
(Date:8/31/2015)... ... ... The Bay Pines VA Healthcare System (VAHCS) remains focused on ... doctors and nurses and expanding existing facilities and services. Spine surgery will soon ... Jabre was selected to lead and grow the Bay Pines VAHCS’s new spine surgery ...
(Date:8/31/2015)... ... September 01, 2015 , ... Neuropsychiatric Disease and ... emphasis on transcranial near-infrared laser phototherapy ”. , As corresponding author Dr Theodore ... largely untreatable - with mostly palliative treatments only - and now we have ...
Breaking Medicine News(10 mins):Health News:India Network proudly launches the new InstantQuote tool to help choose right visitor health insurance with pre-existing conditions to US bound visitors 2Health News:CareSource Names Vice President, Marketing and Corporate Communications 2Health News:Neurosurgeon Selected to Lead Growing Spine Care Program 2Health News:Neurosurgeon Selected to Lead Growing Spine Care Program 3Health News:Near-Infrared Laser Phototherapy for Brain Injury published by Dove Medical Press 2Health News:Near-Infrared Laser Phototherapy for Brain Injury published by Dove Medical Press 3
... NARSAD: The Brain and Behavior Research Fund awards $12.6 ... the most promising ideas to lead to breakthroughs in ... from leading research institutions on six continents have been ... Investigator grant awards to support their innovative research. Since ...
... HealthDay Reporter , THURSDAY, Jan. 6 (HealthDay News) -- Crying ... some space: A new study indicates the smell of women,s ... scientists examining the significance of emotional human tears suggests they ... the eyes. Women,s tears play a functional role by emitting ...
... Alan Mozes HealthDay Reporter , THURSDAY, Jan. 6 ... wounded trauma patients intravenous (IV) fluids before bringing them ... death, a new study suggests. The finding flies in ... some states that require that IV fluids be given to ...
... that relies on thousands of synthetic molecules to fish for ... Alzheimer,s disease with a simple blood test. The same methodology ... to the report in the January 7th issue of the ... this works in Alzheimer,s disease, it suggests it is a ...
... on reactive oxygen species (ROS) ions or very small ... they damage cell structure and their potential link to stroke, ... Eli and Edythe Broad Center of Regenerative Medicine and Stem ... stem cells, the cells that give rise to neurons, maintain ...
... 2010 Researchers at Wofford College discovered that a Border ... names of objects and orders to fetch them. This research ... a dog that knew the names of a couple of ... far a dog could go, and whether the dog really ...
Cached Medicine News:Health News:NARSAD announces $12.6 million for new generation of brain and behavior research 2Health News:Women's Tears Tell Men to Back Off 2Health News:Giving IV Fluids on Scene Might Raise Death Risk for Trauma Victims 2Health News:Giving IV Fluids on Scene Might Raise Death Risk for Trauma Victims 3Health News:A blood test for Alzheimer's disease? 2Health News:A blood test for Alzheimer's disease? 3Health News:Neural stem cells maintain high levels of reactive oxygen species, UCLA study finds 2Health News:Neural stem cells maintain high levels of reactive oxygen species, UCLA study finds 3Health News:Border collie comprehends over 1,000 object names 2Health News:Border collie comprehends over 1,000 object names 3
(Date:8/31/2015)... 31, 2015  Asterias Biotherapeutics, Inc. (NYSE MKT: ... field of regenerative medicine, today announced that the ... Chicago -based Rush University Medical Center in ... escalating doses of AST-OPC1 (oligodendrocyte progenitor cells) in ... cervical spinal cord injury (SCI). This represents the ...
(Date:8/31/2015)... 2015   BioLife Solutions , Inc. (NASDAQ: ... marketer of proprietary clinical grade cell and tissue ... media and a related cloud hosted ... smart shippers ("BioLife" or the "Company"), today ... biopharmaceutical company focused on developing and commercializing novel ...
(Date:8/28/2015)... , Aug. 28, 2015  With the heroin ... reaching deadlier heights, Jacksonville -based Lakeview ... Hemphill is helping to explain why fentanyl is ... approximately 40 to 50 times more potent than pharmaceutical ... users as heroin, the risk of death skyrockets. ...
Breaking Medicine Technology:Asterias Biotherapeutics Concludes Recruitment of Initial Safety Cohort of the SCiStar Phase 1/2a Dose-Escalation Clinical Trial of AST-OPC1 for Complete Cervical Spinal Cord Injury 2Asterias Biotherapeutics Concludes Recruitment of Initial Safety Cohort of the SCiStar Phase 1/2a Dose-Escalation Clinical Trial of AST-OPC1 for Complete Cervical Spinal Cord Injury 3Asterias Biotherapeutics Concludes Recruitment of Initial Safety Cohort of the SCiStar Phase 1/2a Dose-Escalation Clinical Trial of AST-OPC1 for Complete Cervical Spinal Cord Injury 4Asterias Biotherapeutics Concludes Recruitment of Initial Safety Cohort of the SCiStar Phase 1/2a Dose-Escalation Clinical Trial of AST-OPC1 for Complete Cervical Spinal Cord Injury 5Asterias Biotherapeutics Concludes Recruitment of Initial Safety Cohort of the SCiStar Phase 1/2a Dose-Escalation Clinical Trial of AST-OPC1 for Complete Cervical Spinal Cord Injury 6BioLife Solutions Customer TiGenix Phase 3 Clinical Trial Meets Primary Endpoint 2BioLife Solutions Customer TiGenix Phase 3 Clinical Trial Meets Primary Endpoint 3BioLife Solutions Customer TiGenix Phase 3 Clinical Trial Meets Primary Endpoint 4BioLife Solutions Customer TiGenix Phase 3 Clinical Trial Meets Primary Endpoint 5Lakeview Health's Dr. Philip Hemphill Explains Why Heroin Addicts Are Now Dying of Fentanyl Overdoses 2
... (OTCQX: DATA), a technology and services company focused on global ... its Vice President of Research and Development, Chris Wilke, has ... 2009 Society for Clinical Data Management (SCDM) Annual Conference which ... Mr. Wilke will be discussing Is 100% EDC Realistic? ...
... ThermalTherapeutic Systems, Inc., developers of a highly ... today the completion of $2.75 Million Series A ... funding by the Pittsburgh Life Sciences Greenhouse, and ... investments by the Pittsburgh Life Sciences Greenhouse and ...
Cached Medicine Technology:DATATRAK to Present at 2009 SCDM Annual Conference 2DATATRAK to Present at 2009 SCDM Annual Conference 3ThermalTherapeutic Systems Completes $2.75 Million Series A Financing With Originate Ventures 2
The Natural Selection family of specialty allografts is spinal concepts response to surgeon requests for spinal allograft devices to eliminate the need for painful autograft harvesting....
Transcranial vascular DWL doppler....
Transcranial vascular DWL doppler....
... Neurocare is a full-featured physiologic testing system offered ... contains many of the features of our flagship ... economical price. , ,The smaller size of the ... environment, the physician's office, a mobile service or ...
Medicine Products: