Navigation Links
Birdsong independent of brain size
Date:6/13/2011

same species sex differences between two sets of birds, those that sing differently, namely the dominant males and females, and those that sing identically, namely the subordinate males and females", says Manfred Gahr from the Max Planck Institute for Ornithology in Seewiesen.

The results of the study took the scientists by surprise, as the sex difference they observed turned out to vary with the social status of the birds. The researchers initially found what they expected based on the traditional hypothesis the dominant males had a far larger song nucleus HVC, which was three times the size of that in the females. However, when they compared the subordinate males and females, both of which sing the same duet song, the male HVC was still twice as big as the female HVC. Another brain area, the RA nucleus, which is also responsible for the production of the song, displayed the same pattern. The size differences are mainly due to the higher number of neurons found in these brain areas. Interestingly, no differences were observed in area X, a region of the brain that plays a role in song learning.

An entirely different picture emerged, however, from examination of the gene activity in the HVC. The activity patterns of two genes that code for synapse proteins proved to be far better correlated with the birds' polymorphic song behaviour than the size of their brain areas. When they compared the gene activity patterns in the subordinate males and females, the scientists discovered equal levels of activity for both sexes. However, in dominant females, both genes were markedly more active than in the dominant males.

The findings of the various male-female comparisons do not coincide with the accepted view of the regulation of sex differences in the brain and behaviour. If it is assumed that the greater number of neurons found in the brain of the dominant males is necessary for the singing of the complex solo song, then the sex difference in the
'/>"/>

Contact: Manfred Gahr
gahr@orn.mpg.de
49-815-793-2276
Max-Planck-Gesellschaft
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. CCNY, CSHL biologists find birdsong of isolates reverts to norm over several generations
2. CIC Named to Independent Research Firms Hot Banking Tech Companies to Watch in 2009 Report
3. CIC to Host Webinar Featuring Independent Research Firm: Enabling Straight Through Processing - Why the Insurance Industry Needs Electronic Signature Technology
4. LocatePLUS Announces Election of Independent Board
5. First cGMP feeder-independent pluripotent stem cell banks released for distribution
6. A global model for the origin of species independent of geographical isolation
7. New insight into chromosome segregation: Centromere-independent kinetochore assembly
8. Penn biophysicists create new model for protein-cholesterol interactions in brain and muscle tissue
9. During exercise, the human brain shifts into high gear on alternative energy
10. Millisecond brain signals predict response to fast-acting antidepressant
11. Food for thought -- regulating energy supply to the brain during fasting
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Birdsong independent of brain size
(Date:1/22/2015)... Jan. 16, 2015  A man-made form of insulin delivered ... mental capabilities in adults with mild cognitive impairment and ... by researchers at Wake Forest Baptist Medical Center. ... amnesic mild cognitive impairment (MCI) or mild to moderate ...
(Date:1/22/2015)... Research and Markets ( http://www.researchandmarkets.com/research/wxdglm/global_wearable ) ... Wearable Technologies Market and Applications, Opportunities, Industry Analysis, ... 2014-2020" report to their offering. , ... can be worn on the user,s body and ...
(Date:12/22/2014)... , Dec. 22, 2014 Research and Markets ... addition of the "The Global Watermarking and ... http://photos.prnewswire.com/prnh/20130307/600769 ... digital media watermarking and fingerprinting markets. Watermarking aims ...
Breaking Biology News(10 mins):Nasal Spray with Insulin Equivalent Shows Promise as Treatment for Adults with Mild Cognitive Impairment, Alzheimer's Dementia 2Nasal Spray with Insulin Equivalent Shows Promise as Treatment for Adults with Mild Cognitive Impairment, Alzheimer's Dementia 3Global Wearable Technologies Market and Applications, Opportunities, Industry Analysis, Segmentation, Size, Growth, Share, Overview, Trends and Forecast 2014-2020 2The Global Watermarking and Fingerprinting Markets 2
... first time, researchers have developed a way to synthesize a ... it works. , Derived from a fungus discovered clinging to ... certain cancer cells into suicide while leaving healthy cells untouched. ... might have some tremendous potential as a prototype anticancer agent, ...
... cell count" burst into the world's medical vocabulary as ... The public began to understand the crucial importance of ... infection and guarding against future attacks. , While scientists ... diseases, one area has remained murky: disorders caused by ...
... together, and most people find it impossible to tell ... just about everything, including their genes. But sometimes only ... both of them should. , Scientists at the University ... how two people who are so similar biologically can ...
Cached Biology News:New lab technique churns out fungus' potential cancer fighter 2Researchers add crucial information on how the body's T cells react to parasitic diseases 2Researchers add crucial information on how the body's T cells react to parasitic diseases 3How can identical twins be genetically different? 2How can identical twins be genetically different? 3
(Date:1/23/2015)... Jan. 23, 2015  Array BioPharma Inc. (NASDAQ: ... definitive agreement with Novartis Pharma AG to acquire worldwide ... Phase 3 development.  This agreement is conditional on the closing ... on April 22, 2014, which are expected to close in ...
(Date:1/22/2015)... (PRWEB) January 22, 2015 GEA Niro ... table top laboratory homogenizer, the PandaPLUS 2000, which is ... nanoemulsions , and cell disruption . This compact ... products, fruit juices, liquid food, food additives and ingredients ...
(Date:1/22/2015)... / Rootstown, OH (PRWEB) January 22, 2015 ... platform, announced today that it has received AOAC-PTM Certifications for ... O1O3, O111, O121, and O145; collectively referred to as STEC ... O157, at 1 colony forming unit (cfu) per 325 g ...
(Date:1/22/2015)... 22, 2015 Selexis SA, a serial ... Cell Banks (RCBs) used for drug discovery to commercial ... will include Next-Generation Sequencing (NGS) data packages. ... biologic manufacturing by ensuring the integrity of the gene, ...
Breaking Biology Technology:Array Announces Agreement To Acquire ENCORAFENIB (LGX818) 2Array Announces Agreement To Acquire ENCORAFENIB (LGX818) 3Array Announces Agreement To Acquire ENCORAFENIB (LGX818) 4Array Announces Agreement To Acquire ENCORAFENIB (LGX818) 5Array Announces Agreement To Acquire ENCORAFENIB (LGX818) 6Array Announces Agreement To Acquire ENCORAFENIB (LGX818) 7GEA Niro Soavi Announces the PandaPLUS 2000 Homogenizer for Processing New Applications for Nanoemulsions and Cell Disruption 2Crystal Diagnostics Awarded AOAC-PTM Accreditation for the Rapid Detection of “Big 6” E.coli Food Pathogens 2Selexis Generated Research Cell Banks Now Fully Sequenced Using Next-Generation Sequencing 2
... Non-GAAP EPS Increased 22 Percent, CAMBRIDGE, Mass., April 23 ... the first quarter of,2008, which featured excellent revenue growth, continued ... the company., First-Quarter Highlights -- Total revenue ... $883.2 million in same period a ...
... Cardiac Science,Corporation (Nasdaq: CSCX ), a ... informatics products, announced today,that it will release its ... 2008 after the market close. The Company has ... 4:30 p.m. Eastern Time to,discuss the financial results ...
... image are better than one for analyzing tumors , ... determine the amount of oxygen in a tumor very useful, because ... a poor outcome. A new method to do this and to ... been developed and used to image tumors in mice by Murali ...
Cached Biology Technology:Genzyme Reports Strong First-Quarter Growth 2Genzyme Reports Strong First-Quarter Growth 3Genzyme Reports Strong First-Quarter Growth 4Genzyme Reports Strong First-Quarter Growth 5Genzyme Reports Strong First-Quarter Growth 6Genzyme Reports Strong First-Quarter Growth 7Genzyme Reports Strong First-Quarter Growth 8Genzyme Reports Strong First-Quarter Growth 9Genzyme Reports Strong First-Quarter Growth 10Genzyme Reports Strong First-Quarter Growth 11Genzyme Reports Strong First-Quarter Growth 12Genzyme Reports Strong First-Quarter Growth 13Genzyme Reports Strong First-Quarter Growth 14Genzyme Reports Strong First-Quarter Growth 15Genzyme Reports Strong First-Quarter Growth 16Genzyme Reports Strong First-Quarter Growth 17Genzyme Reports Strong First-Quarter Growth 18Genzyme Reports Strong First-Quarter Growth 19Cardiac Science Schedules First Quarter Earnings Release and Announces Conference Call 2JCI table of contents: April 22, 2008 2JCI table of contents: April 22, 2008 3JCI table of contents: April 22, 2008 4JCI table of contents: April 22, 2008 5JCI table of contents: April 22, 2008 6JCI table of contents: April 22, 2008 7JCI table of contents: April 22, 2008 8JCI table of contents: April 22, 2008 9JCI table of contents: April 22, 2008 10JCI table of contents: April 22, 2008 11JCI table of contents: April 22, 2008 12
... personal-sized Thermal Cycler is the ideal instrument for ... range of PCR applications. Get Applied ... Save lab space without sacrificing results. ... Industry-Standard PCR Technology You Can Afford ...
... upgraded micro 10 represents a major advance ... of the benefits of large robotic liquid ... benchtop dispenser. Dispensing accurate volumes ranging from ... 10 has unique advantages not yet found ...
This free-standing laminar flow hood provides a horizontal flow of HEPA-filtered air to create a clean processing area. Air return slots along the front and side edges of the work area enhance system...
... Motic's B3 series of microscopes offer all ... required for laboratory work. Equipped with Koehler ... Contrast (ASC) objectives. The B3 is the ... Siedentopf binocular tube eliminates the need for ...
Biology Products: