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:6/17/2015)... , Deutschland und GERMANTOWN, Maryland ... Investigator ®   Produktlinie mit DNA-Tests ... QIAGEN N.V. (NASDAQ: QGEN ; Frankfurt Prime Standard: ... neue STR-Testkits der Produktlinie Investigator ... in den Markt eingeführt. Die neuen Kits zur Erstellung ...
(Date:6/17/2015)... 2015  Synaptics Inc. (NASDAQ: SYNA ), ... that Xiaomi, one of the world,s largest mobile ... ® family of capacitive touchscreen solutions and ... for its latest smartphones, the Xiaomi Mi Note ... in-cell display solutions and DDICs in discrete display ...
(Date:6/16/2015)... CITY , June 16, 2015 /CNW Telbec/ ... their partnership centralized around the incorporation of handyem,s ... point-of-care diagnostic laboratory, the Mo-POD™. This unprecedented model ... BIO International Conference at the Pennsylvania ... from June 15 th to 18 ...
Breaking Biology News(10 mins):QIAGEN bringt in den USA neue Kits für die forensische DNA-Analyse auf den Markt 2QIAGEN bringt in den USA neue Kits für die forensische DNA-Analyse auf den Markt 3QIAGEN bringt in den USA neue Kits für die forensische DNA-Analyse auf den Markt 4QIAGEN bringt in den USA neue Kits für die forensische DNA-Analyse auf den Markt 5QIAGEN bringt in den USA neue Kits für die forensische DNA-Analyse auf den Markt 6Synaptics Touchscreen and Display Driver IC Solutions Power Xiaomi's Latest Flagship Smartphones 2Synaptics Touchscreen and Display Driver IC Solutions Power Xiaomi's Latest Flagship Smartphones 3handyem and FlowMetric Diagnostics announce their partnership in the development of Flow Cytometry- Based Solutions in diagnostic capabilities 2handyem and FlowMetric Diagnostics announce their partnership in the development of Flow Cytometry- Based Solutions in diagnostic capabilities 3
(Date:6/26/2015)... ... June 26, 2015 , ... Charm Sciences, Inc. is ... and Stockyards Administration (GIPSA) awarded a five year contract to Charm Sciences to ... Charm’s ROSA DONQ-FAST5 Test. This 5 minute quantitative test extracts DON from samples ...
(Date:6/26/2015)... ... 26, 2015 , ... Claremont BioSolutions, LLC, a pioneer of ... into a sample prep module intended to enable real-time quantitative gene expression analysis ... WetLab-2 Project. , On June 28, 2015, SpaceX CRS-7 will launch from Cape ...
(Date:6/26/2015)... 26, 2015 The report "Biolubricants ... Fluids, Metalworking fluids, Chainsaw oils, Mold Release Agents), End ... - Global trends and Forecasts to 2020" published by ... Million by 2020 at a CAGR of 6.27% between ... data Tables and   66 Figures spread through 170 ...
(Date:6/25/2015)... , June 25, 2015 /PRNewswire/ ... http://www.researchandmarkets.com/research/vxtfvv/2015_market ) has announced the addition ... of the Global Cancer Diagnostics Industry: ... Hormones, Immunohistochemical Stains--Hospitals, Commercial Labs, POC ...      (Logo: http://photos.prnewswire.com/prnh/20130307/600769) , ...
Breaking Biology Technology:USDA-GIPSA (FGIS) Awards 5 Year Contract for Vomitoxin Tests to Charm Sciences 2Claremont BioSolutions’ SimplePrep™ Products Deployed in NASA Wetlab-2 Project Slated for June 28th Flight to International Space Station aboard SpaceX CRS-7 2Claremont BioSolutions’ SimplePrep™ Products Deployed in NASA Wetlab-2 Project Slated for June 28th Flight to International Space Station aboard SpaceX CRS-7 3Biolubricants Market Worth $2,972.13 Million by 2020 2Biolubricants Market Worth $2,972.13 Million by 2020 3Analysis of the Global Cancer Diagnostics Industry 2015-2020: Oncogenes, Biochemical Markers, Lymphokines, GFs, CSFs, Hormones, Immunohistochemical Stains 2Analysis of the Global Cancer Diagnostics Industry 2015-2020: Oncogenes, Biochemical Markers, Lymphokines, GFs, CSFs, Hormones, Immunohistochemical Stains 3
Cached News: