Navigation Links
Neighbors from hell: Infanticide rife in guillemot colony

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
University of Leeds

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:
Related Image:
Neighbors from hell: Infanticide rife in guillemot colony
(Date:5/16/2016)... 2016   EyeLock LLC , a market leader ... of an IoT Center of Excellence in ... development of embedded iris biometric applications. EyeLock,s ... and security with unmatched biometric accuracy, making it the ... DNA. EyeLock,s platform uses video technology to deliver a ...
(Date:5/9/2016)... -- Elevay is currently known as the ... high net worth professionals seeking travel for work   ... there is still no substitute for a face-to-face meeting. ... deal with a firm handshake. This is why wealthy ... citizenship via investment programs like those offered by the ...
(Date:4/28/2016)... BANGALORE, India , April 28, 2016 ... of Infosys (NYSE: INFY ), and Samsung SDS, ... partnership that will provide end customers with a more ... payment services.      (Logo: ) ... financial services, but it also plays a fundamental part in ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... NEW YORK , June, 23, 2016  The ... students to envision new ways to harness living systems ... of Modern Art (MoMA) in New York ... more than 130 participating students, showcased projects at MoMA,s ... included Paola Antonelli , MoMA,s senior curator of ...
(Date:6/23/2016)... ... June 23, 2016 , ... Supplyframe, the Industry ... Supplyframe Design Lab . Located in Pasadena, Calif., the Design Lab’s mission ... hardware projects are designed, built and brought to market. , The Design Lab ...
(Date:6/23/2016)... ... 23, 2016 , ... In a new case report published today in STEM ... who developed lymphedema after being treated for breast cancer benefitted from an injection of ... dealing with this debilitating, frequent side effect of cancer treatment. , Lymphedema ...
(Date:6/23/2016)... NEWPORT BEACH, Calif. , June 23, 2016 /PRNewswire/ ... offering new biological discoveries to the medical community, has ... and co-founder Matthew Nunez . "We ... provide us with the capital we need to meet ... funding will essentially provide us the runway to complete ...
Breaking Biology Technology: