Page last updated at 18:33 GMT, Monday, 8 February 2010

Eel passes help endangered fish

An Eel Pass
Eel passes like this one at Oath have proved a great success

Research carried out in a Somerset river has given fresh hope to a once-common fish that is now listed as "critically endangered".

The number of European eels in British rivers has fallen by 95% in 20 years.

Research carried out by the Environment Agency (EA) in the River Parret found sluices and gates in waterways were stopping the fish migrating to breed.

Now, a new law requires eel passes - special narrow steel tubes - to be fitted on affected waterways.

'Queuing fish'

The eels can wriggle their way up the passes, on a bed of bristles, to reach the other side of a barrier.

Although the eels spend most of their adult lives in European rivers, they have to reach the Sargasso Sea off Bermuda in order to spawn.

Environment Agency eel expert Andy Don said: 'We know that even one eel pass in the right location can have an instant effect.

"Two passes installed along a watercourse that flows into the River Parrett in Somerset saw 10,000 eels queuing up to use them on the first night, and both 2008 and 2009 saw around 40,000 eels using the passes each year."

The EA says more than 100 new gates, which only cost £200, are being fitted at other locations across the country.



Print Sponsor


SEE ALSO
Thames eel populations fall 98%
22 Jan 10 |  London
Eel numbers falling in Britain's rivers
16 Sep 09 |  Science & Environment

RELATED BBC LINKS

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