Self-imposed food sanctions have already caused inflation in Russia

Russia's embargo on imported Western food is already hitting consumers' pockets, as food prices in Moscow shops have jumped by up to 6% in just a week, according to the BBC.

Moscow officials say frozen fish prices in the capital's major supermarkets have risen by 6%, milk by 5.3% and an average cheese costs 4.4% since the 7 August ban took effect.

Russia has banned imports of those basic foods, as well as meat and many other products, from Western countries, Australia and Japan.

The ban was imposed in response to Western economic sanctions against Russia, over its annexation of Crimea from Ukraine, and a pro-Russian rebellion in eastern Ukraine, which Western capitals accuse Moscow of fomenting.

Elsewhere, on the island of Sakhalin, officials say the price of chicken thighs has soared 60%. Before the sanctions these were among the cheapest and most popular meat products in Russia. In the neighbouring Primorye region fish is now reportedly 40% more expensive than just a few weeks ago.

According to the BBC, Russian social networks have plenty of pictures showing empty shelves in Moscow supermarkets, where foreign varieties of cheese and yoghurt used to be abundant.

But authorities say stocks imported before the ban are large enough to last for a month or more. By that time, European goods will have been replaced by supplies from Brazil, Argentina, Turkey or Egypt, they say. However, other experts say those new supplies will not be enough to prevent further price rises.

"The Brazilian meat price for September is already 20 to 30% higher than it was in August. Don't set your hopes on Brazil, this is just the beginning of a general price rise," Sergei Yushin, head of Russia's Meat Suppliers' Association, told the business daily Vedomosti.

Reminding of Soviet times

The Russian authorities have already promised to monitor food prices closely and punish anyone who tries to profit from the situation illegally. A Soviet-era word - "spekulyanty" - is being used again. It means black market speculators.