TORONTO (Reuters) - The Conservatives lost a bit of ground in an opinion poll released on Sunday, while still remaining in territory that might hand them a majority in Parliament in the May 2 federal election.

The Nanos Research tracking poll of results over three days of surveys put support for the Conservatives at 40.7 percent, down from 41.3 percent in Saturday’s survey. Support for the Liberals fell to 29.4 percent from 30.3 percent.

Under Canada’s electoral system, a party needs around 40 percent of the vote to win a majority of the 308 seats in the House of Commons.

The Conservatives have a minority in Parliament and need support from at least one other party to stay in power.

The daily tracking figures are based on a three-day rolling sample of 986 interviews, with a margin of error of 3.1 percent, plus or minus, 19 times out of 20.