Kilmarnock piled more pressure on Aberdeen boss Mark McGhee by consigning the Dons to a sixth straight defeat.
Conor Sammon's 14th goal of the season gave Killie a half-time lead, the striker converting a rebound shot after Alexei Eremenko's free-kick was saved.
Eremenko was fouled in the box by keeper Jamie Langfield and Jamie Hamill stroked home the resulting penalty.
Aberdeen struggled to get a foothold in the game and Sammon came close again before the end.
On the day of the referees' strike, the Israeli officials in charge at Rugby Park had an easy afternoon of it, with Killie cruising into fifth spot in the Scottish Premier League.
Aberdeen complained about the penalty award but it appeared to be a straightforward decision and there was little doubt about who the better team was following Sammon's opening goal.
Aberdeen have now taken just four points from a possible 39 and their second-half performance offered little encouragement they can turn their fortunes around any time soon.
With a light dusting of snow remaining on the pitch, both sides struggled to piece together any meaningful spells of possession in the early stages.
However, the breakthrough came on 18 minutes when Jerel Ifil slid in recklessly on Sammon to allow Eremenko an opportunity to shoot from 20 yards.
The Finn's curling effort lacked venom but Langfield spilled the ball and Sammon won the race to slide home the rebound and net his eighth goal in six games.
Killie experienced an initial lift before Aberdeen began to produce some sustained passing, but the only time home keeper Cammy Bell was troubled was when he had to punch away Sone Aluko's corner from underneath his crossbar.
Referee Eli Hacmon's quiet afternoon was shattered four minutes after the break when Eremenko went down under Langfield's challenge in the box.
Aberdeen had been exposed at the back by Craig Bryson's pass for Sammon to race on to. The Irishman played a composed square pass to Eremenko, who took the ball too wide as Langfield confronted him before going down.
Eremenko's fall was undoubtedly exaggerated but Langfield looked to have made contact.
The Aberdeen goalkeeper, who was booked, remonstrated with Eremenko while some of his team-mates complained to the referee, before Hamill stepped up to send Langfield the wrong way.
Killie almost went further ahead after another slick break. Eremenko threaded the ball through for Sammon, who turned inside his man and drew an excellent save from Langfield, although the unmarked Taouil had wanted a pass from both men.
Eremenko then set up another chance with a brilliant pass inside the full-back with Langfield getting down to save from Liam Kelly following the cutback.
Aberdeen striker Scott Vernon got a couple of headers on target but Bell was never troubled and Sammon almost capitalised again as Langfield initially mishandled Hamill's drive.
Killie kept the ball from a demoralised Aberdeen for long spells in the final stages, with Langfield producing another save from Eremenko.
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