Featured Research

from universities, journals, and other organizations

Stress may lead to better bird parenting

Date:
June 14, 2011
Source:
Queen's University
Summary:
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.

A tree swallow at Queen's University Biological Station (QUBS).
Credit: Image courtesy of Queen's University

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.


Story Source:

The above story is based on materials provided by Queen's University. Note: Materials may be edited for content and length.


Journal Reference:

  1. F. Bonier, I. T. Moore, R. J. Robertson. The stress of parenthood? Increased glucocorticoids in birds with experimentally enlarged broods. Biology Letters, 2011; DOI: 10.1098/rsbl.2011.0391

Cite This Page:

Queen's University. "Stress may lead to better bird parenting." ScienceDaily. ScienceDaily, 14 June 2011. <www.sciencedaily.com/releases/2011/06/110614131952.htm>.
Queen's University. (2011, June 14). Stress may lead to better bird parenting. ScienceDaily. Retrieved April 16, 2014 from www.sciencedaily.com/releases/2011/06/110614131952.htm
Queen's University. "Stress may lead to better bird parenting." ScienceDaily. www.sciencedaily.com/releases/2011/06/110614131952.htm (accessed April 16, 2014).

Share This



More Plants & Animals News

Wednesday, April 16, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Ebola Outbreak Now Linked To 121 Deaths

Ebola Outbreak Now Linked To 121 Deaths

Newsy (Apr. 15, 2014) The ebola virus outbreak in West Africa is now linked to 121 deaths. Health officials fear the virus will continue to spread in urban areas. Video provided by Newsy
Powered by NewsLook.com
In Washington, a Push to Sterilize Stray Cats

In Washington, a Push to Sterilize Stray Cats

AFP (Apr. 14, 2014) To curb the growing numbers of feral cats in the US capital, the Washington Humane Society is encouraging residents to set traps and bring the animals to a sterilization clinic, after which they are released.. Duration: 02:29 Video provided by AFP
Powered by NewsLook.com
After Attack, Officials Kill 5 Bears in Florida

After Attack, Officials Kill 5 Bears in Florida

AP (Apr. 14, 2014) Florida wildlife officials say they have killed five bears following an attack on a woman in a suburban subdivision in central Florida. Forty-five year-old Terri Frana was attacked by a large bear in her driveway Saturday. (April 14) Video provided by AP
Powered by NewsLook.com
Uruguay Opens Its First Cannabis Library

Uruguay Opens Its First Cannabis Library

AFP (Apr. 13, 2014) Uruguay opened its first Cannabis Library in Montevideo on Saturday, where people can come and read books on cannabis or take classes on how to grow the plant or even how to cook with it. Duration: 01:20 Video provided by AFP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins