Navigation Links
Neighbors from hell: Infanticide rife in guillemot colony
Date:9/16/2008

One of Britain's best-known species of seabird is increasingly attacking and killing unattended chicks from neighbouring nests due to food shortages.

Researchers at the University of Leeds and the Centre for Ecology & Hydrology observed a dramatic increase in the number of adult guillemots deliberately attacking chicks of the same species in the last year. Hundreds of such attacks occurred, and many were fatal, with chicks being pecked to death or flung from cliff ledges.

These disturbing findings, published online today in the Royal Society journal Biology Letters(1), indicate that social harmony even in long-established colonies can break down when conditions get tough, for example if starvation looms. The study highlights a previously unsuspected parental dilemma: should both leave their chick unattended and spend more time feeding, or should one of them remain to protect the chick from attacks from neighbouring birds even if it gets less food?

"The attacks were brutal and usually involved more than one adult as chicks fled from the initial attacking neighbour" says lead author Kate Ashbrook, of Leeds' Faculty of Biological Sciences. "More than two thirds of all documented chick deaths in the sample area were caused by attacks from neighbouring parents. Yet this particular colony has been monitored for almost thirty years, and in that time chick attacks have been very rare occurrences."

Common guillemots (Uria aalge) are attentive parents and rear only one chick during the breeding season, which runs from April to July. Because chicks are vulnerable to attacks from predatory gulls, parents rarely leave them unattended, taking it in turns to find food. However, a decline in prey in recent years has led to both parents being forced to search for food at the same time. Researchers witnessed almost half of all chicks unattended at some point during the day.

Surrounded by neighbours and open to the elements, guillemot colonies are a risky place to raise a chick. Although aggression between adults is common - breeding pairs often are in physical contact and ledges can be densely packed with up to thirty breeding pairs in one square metre aggression toward chicks is unusual.

The research focused on a large established colony of guillemots that inhabit the Isle of May in Scotland. Co-author Professor Sarah Wanless from the Centre for Ecology & Hydrology has been monitoring this colony since 1981. She comments: "This research highlights how fragile the social fabric of a seabird colony is. Having a stressed, hungry neighbour isn't good news if you're an unattended guillemot chick."


'/>"/>

Contact: Kate Ashbrook
bska@leeds.ac.uk
44-077-534-14146
University of Leeds
Source:Eurekalert  

Related biology news :

1. Over the back fence: gardeners get advice from neighbors, friends
2. Colony collapse disorder symposium added to ESA Annual Meeting
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Neighbors from hell: Infanticide rife in guillemot colony
(Date:11/29/2016)... , Nov. 29, 2016 BioDirection, a ... point-of-care products for the objective detection of concussion and ... company has successfully completed a meeting with the U.S. ... Tbit™ blood test Pre-Submission Package. During the meeting company ... system as a precursor to commencement of a planned ...
(Date:11/24/2016)... Nov. 23, 2016 Cercacor today introduced Ember ... their trainers non-invasively measure hemoglobin, Oxygen Content, ... and Respiration Rate in approximately 30 seconds. Smaller than ... and immediate access to key data about their bodies ... training regimen. Hemoglobin carries oxygen to ...
(Date:11/19/2016)... , Nov. 18, 2016 Securus Technologies, a ... for public safety, investigation, corrections and monitoring, announced today ... competitor, ICSolutions, to have an independent technology judge determine ... most modern high tech/sophisticated telephone calling platform, and the ... that they do most of what we do – ...
Breaking Biology News(10 mins):
(Date:11/30/2016)... ... November 30, 2016 , ... SSCI, the established leader in small-molecule cocrystal technology ... latest FDA guidance on pharmaceutical cocrystals as drug substance . The Lunch ... , The event follows the successful November 15th event that took place in Burlingame, ...
(Date:11/30/2016)... (PRWEB) , ... November 30, 2016 , ... ... in the development of a new orally administered treatment for Alzheimer’s disease (AD), ... results of a Phase 2a clinical trial of T3D-959 in mild to moderate ...
(Date:11/30/2016)... London, UK (PRWEB) , ... November 30, 2016 , ... ... old offices on Haymarket after five years and look forward to continuing their expansion ... heart of Soho, an area which has been traditionally favoured by the creative industries, ...
(Date:11/30/2016)... ... November 30, 2016 , ... Microbial ... venture founded by Arianna Huffington, as part of the Thrive Global pop-up store. ... Kit, enabling purchasers to explore the microorganisms in their gut, collectively known as ...
Breaking Biology Technology: