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'Vulnerable' British sharks monitored in Scotland

13 September 2012 Last updated at 08:04 BST

Decades of over-fishing have led to a sharp drop in shark numbers in the UK, according to conservationists.

There are more than 30 types of shark in UK waters. Most are protected by law but a third are still threatened with extinction.

Anglers in Scotland are monitoring six varieties of shark to try to stop their numbers falling.

Jenny Hill reports.