Page last updated at 23:45 GMT, Monday, 17 August 2009 00:45 UK

Age toll taken on wild red deer

Wild Red Deer
The study assessed the lives of wild red deer on the Isle of Rum

A study of wild red deer on the Isle of Rum has found their ageing process can be dramatic and sudden.

Scientists at Edinburgh University studied a thousand of the animals, immortalised in Sir Edwin Landseer's portrait Monarch of the Glen.

They discovered that while males showed the first signs of ageing later than females, when it did catch up their decline could be much faster.

The research looked at the ability of the animals to reproduce as they aged.

Data taken from the past 40 years showed that after about the age of 10, stags quickly became less likely to father calves.

However, hinds, who showed signs of ageing from about nine years old, could go on calving into their late teens.

Researchers also found that the signs of ageing in wild deer could be deceptively complex.

'Big differences'

Older stags appeared able to maintain their antlers well into old age, but despite this they had little success during the autumn rut and fathered very few calves.

Similarly, females which were past their prime were likely to continue breeding, but their offspring tended to be smaller and less likely to survive compared with calves born to younger females.

Dr Dan Nussey, from the University of Edinburgh's school of biological sciences, who led the study, said: "Recent research suggests that wild animals show signs of deterioration in old age, just like animals in captivity and humans, but this is the first study to look in detail at the impact of ageing on breeding in wild mammals.

"We were surprised at how complex the picture was: not only are there big differences between males and females, but the signs of ageing emerge at different times.

"More work is required to understand what is driving these differences. It all shows just how complex the ageing process is."

Kristin Scott, West Highland area manager for Scottish Natural Heritage, welcomed the study.

She said: "The researchers have used this well known population on Rum where the stags and hinds live out their lives in the relatively unspoilt and undisturbed landscape of this spectacular island national nature reserve."

The study by scientists from Edinburgh and Cambridge, was funded by the Natural Environment Research Council (NERC), supported by Scottish Natural Heritage (SNH) and is published in the American Naturalist.



Print Sponsor


SEE ALSO
Cross-breeding 'threat' to deer
22 Jan 09 |  Edinburgh, East and Fife
East is deer accident blackspot
23 Nov 08 |  England
Deer cull plan to boost woodland
07 Oct 08 |  Highlands and Islands
New deer season service launched
06 Aug 08 |  Highlands and Islands

RELATED INTERNET LINKS
The BBC is not responsible for the content of external internet sites


FEATURES, VIEWS, ANALYSIS
Has China's housing bubble burst?
How the world's oldest clove tree defied an empire
Why Royal Ballet principal Sergei Polunin quit

BBC navigation

BBC © 2014 The BBC is not responsible for the content of external sites. Read more.

This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.

Americas Africa Europe Middle East South Asia Asia Pacific