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 Canadian and international institutions. Research at QUBS has resulted in more than 800 publications in peer-reviewed journals and more than 200 graduate and undergraduate theses.

Dr. Bonier's research will be published in an upcoming issue of Biology Letters.


'/>"/>

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

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:3/14/2016)... HANOVER , Allemagne, March 14, 2016 /PRNewswire/ ... http://www.apimages.com ) - --> - ... ) - --> ... les solutions biométriques, fournit de nouveaux lecteurs d,empreintes ... lecteur LF10 de DERMALOG sera utilisé pour produire ...
(Date:3/10/2016)... 10, 2016 --> ... report "Identity and Access Management Market by Component (Provisioning, ... Governance), by Organization Size, by Deployment, by Vertical, and ... MarketsandMarkets, The market is estimated to grow from USD ... 2020, at a Compound Annual Growth Rate (CAGR) of ...
(Date:3/9/2016)... , March 9, 2016 ... government identified that more than 23,000 public service employees ... had been receiving their salary unlawfully.    --> ... country,s government identified that more than 23,000 public service ... or had been receiving their salary unlawfully.    ...
Breaking Biology News(10 mins):
(Date:5/5/2016)... 2016  Why are two uber-successful former agency presidents ... launching a new venture—yet going about things in ... truly helping clients raise the value of their offerings ... different type of collaboration. The result is ... and medical device sectors. Elevate specializes in shaping and ...
(Date:5/4/2016)... ... May 05, 2016 , ... ... support the National Stroke Association during National Stroke Awareness Month in May. ... Twitter pages throughout the month. CereScan will donate $1 up to a ...
(Date:5/4/2016)... ... ... Proove Biosciences, Inc. , the commercial and research leader in personalized pain ... partnership is designed to advance research in pain genetics in an effort to bring ... new agreement, researchers at Proove Biosciences are able to collaborate with Luda Diatechnko, MD, ...
(Date:5/4/2016)... ... May 04, 2016 , ... The Children’s Tumor Foundation ... that causes tumors to grow on nerves throughout the body. It affects 1 in ... numerous community events held during the month of May, as well as online activities, ...
Breaking Biology Technology: