Honolulu Mayor Peter Carlisle collected $53,000 in campaign donations in the second half of 2011, less than 20 percent of his haul from the first half of the year, according to a filing Monday with the Campaign Spending Commission.

That six-month fundraising total is smaller than the respective hauls of Honolulu City Council Vice Chair Ikaika Anderson, who pulled in more than $85,000 in the period even without an announced challenger, and Council Chair Ernie Martin, who secured more than $76,000 even though his term isn’t up until 2014.

Unlike Martin, Carlisle is up for re-election this year, and unlike Anderson, he does have some stiff competition — former Gov. Ben Cayetano and former Acting Mayor Kirk Caldwell.

UPDATE Caldwell’s campaign emailed Civil Beat late Monday to say he has raised more than $72,000 in the last six weeks of the reporting period, which ended Dec. 31. That total will be reflected in his campaign finance report that he intends to file Tuesday, the campaign said.

The filing also will reflect a debt of $188,000 from his last campaign, the statement said. He has said he doesn’t expect to pay himself back this time around.

Meanwhile, Carlisle got a significant fundraising head start on his challengers, and had almost $300,000 cash on hand at the end of the year. A lot of that money came after his inaugural-ball-slash-fundraiser in April.

Cayetano didn’t officially file for the race until Jan. 19, after the reporting period closed. He told Civil Beat he’s yet to hold a fundraiser, but might hold one soon.

Caldwell also did not announce his candidacy until earlier this month, but he held a $1,000-per-plate fundraiser in November as he prepared for a rematch of the 2010 special election.

Caldwell held the financial edge last time around, spending $1.27 million to Carlisle $510,000, but it wasn’t enough to win. Caldwell has said he expects he’ll need to spend between $800,000 and $1.5 million to win the race this year.

Tuesday is the deadline for filings to cover the six-month period ending Dec. 31.

Carlisle’s list of new contributions are a veritable who’s who of his mayoral administration.

Among those contributing were Facility Maintenance Director Westley Chun; Corporation Counsel Bob Godbey; former Design and Construction Director Collins Lam; Enterprise Services Director Keoki Miyamoto; Parks and Recreation Director Gary Cabato; Planning and Permitting Director David Tanoue; Community Services Director Sam Moku; former Board of Water Supply Acting Manager Dean Nakano; Economic Development Director Ann Chung; Managing Director Doug Chin; Executive Assistant Jim Fulton; and other lower-level city appointees and employees.

Greg Dickhens and Ernest Nishizaki contributed. They’re executives with Kyo-ya, which has been waiting for more than a year for the Zoning Board of Appeals to decide whether it can proceed with a hotel redevelopment in Waikiki. Carlisle recently appointed replacement board members amid conflict-of-interest concerns.

Attorneys, architects, real estate professionals and retirees were among the other donors.

Carlisle spent about $15,000 between July and December. Big-ticket purchases were rent at Ward Plaza Warehouse, printing, bumper stickers and catering.

Interestingly, nobody contributed the maximum of $4,000 during the six-month period, and nobody added enough to a previous donation to bring their total over the election cycle up to $4,000. In the first half of the year, 14 people or organizations contributed the maximum to Carlisle’s re-election campaign.