It occured in a letter dated July 14 from the minister of trade and industry, lavado Hugo Montes, to Alex Munoz Wilson, vice president for South America for environmental NGO Oceana.
Environmental groups have availed themselves of the opportunities in the country's new Freedom of Information Act.
According to the government, in 2007 Chilean salmon farmers used 385 metric tons of antibiotics.
In 2008, consumption dropped 60 metric tons, to 325 metric tons.
