Shellfish harvesting has been put on hold at a number of sea lochs in Argyll after a potential risk of raised levels of E coli bacteria was discovered in cockles.
Escherichia coli (E.coli) has been identified in Loch Creran in Lorn, Loch na Cille at Kilmelford, Loch Riddon in Cowal, Dunstaffnage near Oban and Loch Spelve on Mull.
A spokeswoman for Argyll and Bute Council said: “Eating shellfish such as cockles, mussels, oysters or razor fish from these areas may pose a risk to human health.
“Notices to warn the public and casual gatherers have been posted at various locations on the shore. Commercial shellfish harvesters in these areas have been contacted by the council and steps taken to postpone harvesting until bacterial levels subside.
“It is a sensible precaution to avoid eating shellfish from this area until further notice. When the situation subsides, the warning will be removed.”
Meanwhile the council announced that E coli bacteria levels have returned to normal at Ledaig Point, North Connel, following an earlier warning.
Raised levels of naturally occurring algal toxins have also been identified at Ardcastle Bay, Loch Fyne and Loch Striven in Cowal.
The council spokeswoman added: “These naturally-occurring toxins accumulate in molluscs such as mussels, oysters, cockles and razor clams and when levels breach statutory limits, harvesting of affected species is prohibited.”