THE CANADIAN PRESS -- OTTAWA - Both the goods-producing and services sectors remained the same as real gross domestic product was unchanged in April.

Statistics Canada reports significant increases in mining of metal ore and coal, while retail trade, the public sector, construction and utilities also advanced.

But the agency says the growth was offset by declines in manufacturing and, to a lesser extent, in wholesale trade and the finance, insurance and real-estate sectors.

Transportation services were unchanged.

Mining rose one per cent in April, primarily on the strength of copper, nickel, lead and zinc mining; coal mining also contributed to the growth.

Support activities for mining oil and gas extraction continued to advance, though overall oil-and-gas extraction was down 0.3 per cent.

Manufacturing decreased 0.7 per cent, with most of the decline concentrated in the production of durable goods. A 6.9 per cent decrease in motor vehicles and parts production was mostly due to supply disruptions as a consequence of the tsunami in Japan.

This decrease, combined with lower production of aerospace products, led to a 4.7 per cent reduction in manufacturing of transportation equipment.

Manufacturers of furniture and related products, printed products and electric equipment also cut back production. Manufacturing of machinery -- notably of mining and oil-and-gas machinery and of food products -- increased.

Retail trade increased 0.5 per cent in April after declining in March.

Wholesale trade decreased 0.5 per cent in April.

Construction edged up 0.1 per cent.

The output of real estate agents and brokers decreased 4.4.

The finance and insurance sector fell 0.4.