document: The Latics lost 1-0 at home to fellow relegation candidates Bristol City on Saturday to leave them four points from safety with nine games remaining.
  Former Manchester United Under-21 manager Joyce, 52, took over in November after Gary Caldwell's sacking but only won six of 24 games in charge.
  Assistant manager Graham Barrow will take charge for the rest of the season.
  "It is unfortunate that we have made this decision but with the team in such a perilous position in the league, we need to act now because we cannot afford to fall any further behind," said chairman David Sharpe.
  "Results and performances have simply not been up to standard often enough in recent matches.
  "Although we acknowledge the difficulties faced in managing a team in a league where we are competing against clubs with much larger budgets, the nature of some of our recent defeats, especially against close rivals, has fallen short in terms of what we as a club, and all our supporters, expect."
  Former Bolton, Preston, Plymouth, Burnley and Hull City midfielder Joyce signed a three-and-a-half-year contract with Wigan, but has left along with first team coach Andy Welsh.
  After winning the League One title last season, the Latics have struggled in the second tier, and are the lowest scorers, having failed to find the net in 10 of their last 14 home matches.
  Barrow, 62, is a former Wigan midfielder and manager who returned to the club in 2009 to work as a coach under Roberto Martinez.
summary: Championship strugglers Wigan Athletic have parted company with boss Warren Joyce after only four months.