Consumers are eating less shellfish as they re-evaluate the cost of the category.

Although value sales of fresh and frozen shellfish rose 1% to £468m [Nielsen, 52 w/e 21 February], volume sales fell by 4%.

"It is possible that this fall has been at the more expensive end of the market, with consumers tightening their belts," said Scottish Shellfish Marketing Group MD Stephen Cameron.

"Certainly, we have found demand for mussels and oysters to have been remarkably buoyant, with sales up by 5% over the previous year."