Bird-shaped kites and a floating scarecrow are being tested to try to stop endangered seabirds drowning in fishing nets. Every year an estimated 95,000 diving birds, including razorbills and guillemots, are accidentally caught in nets off European coasts. But simple deterrents tested by Cornish fishers and devised by scientists and the RSPB have been shown to reduce the toll by about two-thirds.
The scarecrow – or more properly a looming-eyes buoy – has a spinning head with two large eyes that scare diving birds away from gillnets, walls of netting which hang vertically beneath the surface. The LEB was tested alongside a commercially available scarybird kite. Ten Cornish fishers and Fishtek Marine, which created the LEB, fitted cameras to boats to monitor the effect of the devices on seabird behaviour.
The results of the two-year trial, which was analysed by scientists from the University of Exeter and published in the journal Conservation Letters, showed that the chance of seabirds being caught in gillnets fell by 59% using LEBs and by 71% using kites. The research revealed that in Cornwall most seabirds were caught in winter, which will help target the use of the devices by season. Tom Horton, lead author of the University of Exeter research, said: “This study provides some of the strongest evidence to date that simple, practical deterrents can substantially reduce seabird bycatch in gillnet fisheries.
Extract — continue reading at the source.
