Navigation Links
Stress may lead to better bird parenting
Date:6/14/2011

Birds with high levels of stress hormones have the highest mating success and offer better parental care to their brood, according to new biology research at Queen's University.

"Having high levels of glucocorticoid or stress hormone is often thought to indicate an individual in poor condition who has a low level of mating success. However, our research indicates that tree swallows with the highest levels of stress hormone have the highest reproductive success," says Frances Bonier (Biology) who investigates the way animals cope with challenges in their environment.

The researchers measured glucocorticoid levels in female tree swallows before and after experimentally changing their brood sizes. Females whose broods were enlarged by two nestlings nearly doubled their glucocorticoid levels, while the glucocorticoid levels of females whose broods were reduced remained unchanged.

Females with greater increases in glucocorticoids also fed their nestlings at higher rates, suggesting that stress hormones facilitate parental behaviour.

In previous years, the researchers found correlations between stress hormone levels, the number of offspring in a brood, and the amount of weight nestlings gained. The next stage is manipulating levels of stress hormones in tree swallows and observing subsequent effects on parental behaviour.

For all these studies, the focal system is a nest-box breeding population of tree swallows established more than 35 years ago at the Queen's University Biological Station (QUBS).

"The QUBS population of tree swallows offers a unique opportunity to conduct large-scale field experiments, allowing us to tease apart the complex interactions between the environment, physiology, behaviour, life history and fitness effects in free-ranging animals," says Dr. Bonier.

QUBS has been a pivotal part of research and teaching at Queen's for more than six decades and hosts researchers from both Cana
'/>"/>

Contact: Christina Archibald
christina.archibald@queensu.ca
613-533-2877
Queen's University
Source:Eurekalert  

Page: 1 2

Related biology news :

1. University professor stresses links between US Navy sonar and whale strandings
2. Exposing chicks to maternal stress leads to long-term reproductive success
3. Stress may make you itch
4. In child care, relationships with caregivers key to childrens stress levels
5. Children distressed by family fighting have higher stress hormones
6. Understanding how oxidative stress impairs endothelial progenitor cell function
7. Stress disrupts human thinking, but the brain can bounce back
8. Stress may hasten the growth of melanoma tumors
9. Unexplained chest pain can be due to stress
10. New and unexpected mechanism identified how the brain responds to stress
11. HIV-1 protease inhibitor induced oxidative stress in pancreatic B-cells: thymoquinone protection
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Stress may lead to better bird parenting
(Date:4/17/2014)... Foundation has been named awardee of a three-year ... Defense Spinal Cord Injury Research Program. Gail Forrest, ... double-blinded, controlled, multi-site clinical trial, which will test ... spinal cord injury. Dr. Forrest is assistant director ... Foundation. Two additional sites will participate - the ...
(Date:4/17/2014)... births, Down syndrome - or trisomy 21 - is ... results from a chromosomal abnormality where cells of affected ... of the human genome). A study conducted by Stylianos ... Medicine and Development at the University of Geneva (UNIGE) ... light on how the extra chromosome 21 upsets the ...
(Date:4/17/2014)... One day about eight years ago, Katia ... Riverside, and her father were on a field trip in ... an orchid they had never seen before. , Unable to ... orchids. The orchid turned out to be an unnamed ... Lophiaris silverarum . , "Lophiaris" is the genus name, comprising ...
Breaking Biology News(10 mins):Kessler Foundation awarded Department of Defense grant for spinal cord injury research 2Trisomy 21: How an extra little chromosome throws the entire genome off balance 2Trisomy 21: How an extra little chromosome throws the entire genome off balance 3Orchid named after UC Riverside researcher 2Orchid named after UC Riverside researcher 3
... a current issue in neuroscience, Aldo Faisal and Simon Laughlin ... transmitting information. They show that noise effects in ion channels ... the fidelity of transmission is compromised. , Neurons in ... density of up to 4km per mm3 by using incredibly ...
... A naturally occurring molecule in the body appears to ... agonists used in acute heart failure or in inhalers ... oxide is a molecule produced by the body that ... blood vessels. , New experiments conducted by Duke ...
... The first clinical trial to test a revolutionary treatment ... at UCL (University College London). The trial, funded by ... kind and could have a significant impact on future ... involves adults and children who have a condition called ...
Cached Biology News:Nitric oxide: Key to cardiovascular and pulmonary function and drug effectiveness 2Nitric oxide: Key to cardiovascular and pulmonary function and drug effectiveness 3First clinical trial of gene therapy for childhood blindness 2
(Date:1/14/2014)... BETHESDA, Md. , Jan. 14, 2014  Organovo ... institutes from the National Institutes of Health (NIH) to ... more effective treatments to patients on a faster timeline. ... Translational Sciences (NCATS) and the National Eye Institute (NEI) ...
(Date:1/14/2014)... January 14, 2014 In recent years, ... and methods in product development and promotion has led ... This mistrust, fueled by concerns about the insidious impact ... reports of spectacular fines to the world’s biggest pharmas ...
(Date:1/14/2014)... (PRWEB) January 14, 2014 Global ... developing innovative information technology solutions for patients, physicians, ... care stakeholders, announced today the signing of a ... Food and Drug Administration (FDA). This initiative ...
(Date:1/14/2014)... UK (PRWEB) January 13, 2014 Bob ... with more than 20 years in the industry, has ... photonics . Hainsey will serve as the society’s Science ... Dr. Hainsey join SPIE as our Technology Strategist, further ...
Breaking Biology Technology:Organovo Announces Collaboration with National Institutes of Health 2Organovo Announces Collaboration with National Institutes of Health 3The Sunshine Act: Necessary Regulation or Unnecessary Dysregulation? New Life Science Webinar Hosted by Xtalks and IRB Services 2The Sunshine Act: Necessary Regulation or Unnecessary Dysregulation? New Life Science Webinar Hosted by Xtalks and IRB Services 3Global Record Systems Announces Research Collaboration Agreement with FDA to Create a Novel “Big Data” Paradigm for Collection of Patient Safety and Outcomes Information 2Photonics R&D Leader Bob Hainsey Joins SPIE Technical Staff 2
... AB, the Swedish,life science technology company, has ... based on supercritical fluid technology.,The Company,s RightSize ... of traditional micronization and is well suited ... the advantages of earlier supercritical,fluid technologies it ...
... As researchers push towards detection of single molecules, single ... movement, Yale researchers have demonstrated silicon-based nanocantilevers, smaller than ... eliminating the need for electric transducers and expensive laser ... advance online publication of Nature Nanotechnology ushers ...
... CITY, China, April 24 Sinobiopharma, Inc. (OTC Bulletin ... highlights from the unaudited financial results for the nine month period ... , Sales revenue increased to ... US $1,170,677 in the corresponding period ended February 29, 2008. ...
Cached Biology Technology:Xspray Expands to Meet Pharma's Interest in its Ground-Breaking Particle Production Technology 2Xspray Expands to Meet Pharma's Interest in its Ground-Breaking Particle Production Technology 3Catching the lightwave: Nano-mechanical sensors 'wired' by photonics 2Sinobiopharma Reports a 41% Increase in Revenues From Unaudited Financial Results for the 9 Month Period Ended February 28, 2009 2
... Sample Preparation for Membrane Proteins ,Contains ... membrane,protein extracts for 2-D gel analysis ... Extraction Kit , (contains sufficient ... a packed cell weight of 10 mg ...
...
Rabbit polyclonal to MCP2 ( Abpromise for all tested applications). entrezGeneID: 6355 SwissProtID: P49873...
... polystyrene with frosted labeling surfaces, volume ... counting. 100% integrity tested. Linkage: This ... number, created to easily match Cornings ... yet, please order under the old ...
Biology Products: