Premier Kathy Dunderdale says she will not change how she governs because of polling data that continues to show eroding support for Newfoundland and Labrador's governing Tories.

Corporate Research Associates reported Thursday in its latest quarterly poll that the Progressive Conservatives have the support of 45 per cent of decided voters, the third drop in a row and well down from the 60 per cent recorded last November.

Dunderdale herself is less popular than her party, with 37 per cent of respondents identifying her as their preference for premier among the three party leaders.

Dunderdale was travelling Thursday and not available for an interview, but said in a statement said she is not concerned about the poll.

"Governing requires responsibility. With responsibility comes difficult decisions," said Dunderdale, adding that the PCs had been elected with a "strong mandate to implement the plan and vision" of the party's platform.

"Responsible leaders do not govern based on polls. We will continue to govern according to the vision, principles and platform on which we were elected," Dunderdale's statement said.

"Our government remains committed to working for the people of Newfoundland and Labrador and ensuring that the province's economic and social success continues to grow."

CRA put the NDP in second place with 33 per cent support among decided voters. The Liberals were at 22 per cent.

The poll involved 800 adults interviewed between Aug. 9 and Sept. 2, and is considered accurate within 3.5 percentage points, 19 times out of 20.

Liberal Leader Dwight Ball told CBC News that the latest poll shows the Liberals are regaining support of voters. The Liberals are currently in a consultation process with the party's grassroots, aimed toward picking a leader next year.

Ball said the Liberals intend "to reshape this party so that it becomes a credible option for people again in the next election."

The NDP's Lorraine Michael welcomed the poll as validation of her hard work as leader.