The FBI's recent seizure of Megaupload.com and its arrest of founder Kim Dotcom has done little to reduce piracy, says a web-traffic analyst. 

In the hour after the bust, total internet trafffic around the world fell by two to three per cent - an indication of the scale of Megaupload, which hosted 34 per cent of file-sharing, according to analyst Deep Field Networks.

But just a day afterwards, the trade in shared music and films 'had not decreased much', says the analyst - it had just shifted to new services, and to new computer servers in Europe, rather than America.

Megaupload: At the time of the American move against the file-sharing site, the site represented 30 to 40 per cent of all file-sharing on the internet - global internet traffic fell by two to three per cent in the hour after the bust

Putlocker, MediaFire and Rapidshire were the big gainers in the 24 hours after Megaupload shut down.