TORONTO (Reuters) - Teh ruling Conservative Party lost some ground to rivals ahead of the May 2 election, but remained the front-runners in the race, according to an opinion poll released on Thursday.
The Nanos Research tracking poll of results over three days of surveys showed support for the Conservatives eased to 38.9 percent, from 39.9 percent a day earlier. Support for the main opposition Liberals rose to 31.1 percent from 30.4 percent.
The big gainer on the day was the New Democratic Party of Canada (NDP), where support rose to 18.3 percent from 16.3 percent.
Under Canada's first-past-the-post 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 daily Nanos tracking figures are based on a three-day rolling telephone sample of 989 decided voters and is considered accurate within a range of 3.1 percentage points, 19 times out of 20.
Results from the last three days of polling are as follows:
Poll Release Date April 14 April 13 April 12 Conservatives 38.9 39.9 39.7 Liberals 31.1 30.4 31.2
NDP 18.3 16.3 16.8 Bloc Quebecois 7.5 9.1 7.8 Greens 3.1 3.8 4.0
Reporting by Euan Rocha; editing by Janet Guttsman