HOME >> BIOLOGY >> NEWS
High Testosterone Level May Lead Male Junco To Stray From Mate

COLUMBUS, Ohio -- What makes a normally monogamous male bird stray from his mate to copulate with neighboring females?

High levels of testosterone may be part of the answer, according to a new study. Researchers found that male dark-eyed juncos that were given extra testosterone during the breeding season were more likely than normal males to fertilize females other than their mates.

The junco’s family at the home nest paid the price for these sexual encounters. Results showed that high-testosterone male juncos spent less time providing care for young in their own nests. Researchers suspect this is why high-testosterone males, when compared to normal males, produced fewer offspring with their own mates but more offspring with the mates of their neighbors.

The study was conducted by Samrrah Raouf, a graduate student, and biologists Ellen Ketterson and Val Nolan, the project’s directors, all of Indiana University. They collaborated with Patricia Parker, associate professor of zoology at Ohio State University, who is an expert in mating systems of birds and in determining parentage; and Charles Ziegenfus of James Madison University, who has studied juncos for many years. Their findings were published in a recent issue of the Proceedings of the Royal Society of London Series B - Biological Sciences.

“Researchers all over the world are using new genetic tools like DNA fingerprinting to understand animal mating behavior,” Parker said.

“In many cases, the results reveal that clandestine matings are taking place, but we often know little about the conditions under which they take place, or the costs and benefits of different mating tactics,” Parker explained.

“This study suggests testosterone plays an important role in determining how often males wander from their home nests to fertilize other females,
'"/>

Contact: Patricia Parker
Parker.3@osu.edu
(614) 292-0378
Ohio State University
10-Feb-1998


Page: 1 2 3 4

Related biology news :

1. Testosterone levels and marriage: High is not all bad
2. Testosterone gel (AndroGel) study demonstrates safety and efficacy up to 42 months
3. Testosterone dose-repsonse relationships in healthy young men
4. Testosterone, stress may not suppress immune system after all
5. Plant-Based Fat May Reduce Risk Of Prostate Cancer By Altering Testosterone Metabolism, UB Study Shows
6. Stress Lowers Sperm Count By Overwhelming Cells That Make Testosterone
7. Testosterone And Working Memory; Epilepsy And Schizophrenia; Toxins And Neuron Death; Oregon Researchers Present Findings At Society For Neuroscience
8. The Reason The French Have Low Levels Of Heart Disease
9. Marine Life In South Pacific Region Found To Be Impervious To Oceans Highest Arsenic Levels
10. Breast Milk Of Women Who Eat Lake Ontario Fish Contains High Levels Of PCBs, UB Study Finds
11. For First Time In 40 Years National Jewish Researchers Report Chronic Beryllium Disease Caused By Extremely Low Levels Of Exposure

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: High Testosterone Level May Lead Male Junco Stray From Mate

(Date:8/31/2015)... , Aug. 31, 2015 Research and Markets ... "Saudi Arabia Biomedical Sensors Market - Growth, Trends ... The Saudi Arabia Biomedical Sensors market is ... of 3.64% over the period 2014-2020 The ... to the genetic formulation of each individual. These sensors ...
(Date:8/26/2015)... 2015 The report "Multi-Factor Authentication (MFA) ... Application (Travel & Immigration, Government, Banking, Defense, Commercial Security, ... 2020", published by MarketsandMarkets, Multi-Factor Authentication Market is expected ... a CAGR of 17.7% between 2015 and 2020. ... igures spread through 169 P ages ...
(Date:8/24/2015)... 24, 2015 The consulting company Frost ... biometrics manufacturer DERMALOG and its customized solutions and products for ... Company of the Year Award". DERMALOG is particularly successful with ...   -Cross reference: Picture is available at AP ... On Thursday evening, in South Africa,s ...
Breaking Biology News(10 mins):Saudi Arabia Biomedical Sensors Market Report 2015 - Growth, Trends & Forecasts (2014-2020) 2Multi-Factor Authentication Market Worth 9.60 Billion USD by 2020 2Multi-Factor Authentication Market Worth 9.60 Billion USD by 2020 3Multi-Factor Authentication Market Worth 9.60 Billion USD by 2020 4Multi-Factor Authentication Market Worth 9.60 Billion USD by 2020 5Frost & Sullivan Honors DERMALOG with Biometrics Prize for Achievements in Africa 2Frost & Sullivan Honors DERMALOG with Biometrics Prize for Achievements in Africa 3
(Date:9/3/2015)... Texas (PRWEB) , ... September 03, 2015 , ... ... suffered a hamstring tear 18 months ago. Conventional treatment and therapy were not ... in late June 2015. Dr. McKenna treated Zack with precisely guided injections ...
(Date:9/3/2015)... PUNE, India , September 3, 2015 ... "Chromatography Instruments Market by System (LC (HPLC, UHPLC, Flash), ... (Reverse Phase Columns, Syringe Filters, Vials) - Analysis & ... Instruments Market is expected to reach around 9.223 Billion ... a CAGR of 5.5%. Browse 141 tables ...
(Date:9/2/2015)... Sept. 2, 2015 Research and ... addition of Jain PharmaBiotech,s new report ... their offering. An increasing ... biotechnology industries is anticipated. Nanotechnology will be ... - from formulations for optimal delivery to ...
(Date:9/2/2015)... 2015 Research and ... of Jain PharmaBiotech,s new report "Biomarkers - ... This report follows the broad definition ... be objectively measured and evaluated as an indicator ... as pharmacological responses to a therapeutic intervention. Tests ...
Breaking Biology Technology:UCLA Wide Receiver and Canadian Decathlon Standout Zack Bornstein Bounces Back After Stem Cell Therapy at Riordan-McKenna Institute 2UCLA Wide Receiver and Canadian Decathlon Standout Zack Bornstein Bounces Back After Stem Cell Therapy at Riordan-McKenna Institute 3Chromatography Instruments Market Worth $ 9.223 Billion by 2020 2Chromatography Instruments Market Worth $ 9.223 Billion by 2020 3Chromatography Instruments Market Worth $ 9.223 Billion by 2020 4Global Nanobiotechnology Applications, Markets and Companies Report 2015-2024 2Global Nanobiotechnology Applications, Markets and Companies Report 2015-2024 3Updated 2015 Biomarkers Report - Latest Technologies, Markets and Companies Insights to 2024 with over 1,000 References 2Updated 2015 Biomarkers Report - Latest Technologies, Markets and Companies Insights to 2024 with over 1,000 References 3
Cached News: