BANGOR University staff joined a national strike over pay.
Lecturers and other employees took to the picket line joined thousands across the UK on the one day walk out.
Unison representative Geoff Edkins said the strike concerned a one per cent pay increase, which was below the rate of inflation.
He added: “Over the last few years our members at universities have receive pay offers that were below inflation, and this year they have decided enough was enough.
“We believe the universities can afford to make a reasonable pay offer and we’re calling on them to do that.”
Members of the University and Colleges Unison and Unite also took strike action.
A UCEA spokesperson said trade union claims that employers had refused to talk were “simply not true.”
He added: "We have met repeatedly over the last six months and as recently as last week.
"Behind the campaign headlines, our trade unions know that pay increases to higher education (HE) staff on the pay spine will mean that salary costs in most HE institutions will actually rise by around 3 per cent this year.
“The increase on all pay points is just one element of the pay picture.
Many staff will also get generous incremental increases and contribution pay.
“These pay increases will be seen as generous by many looking into the sector.
“Our employers are clear that the 1per cent pay uplift is a reasonable offer at the limit of affordability.
“UK economic conditions remain tough and HE institutions continue to operate in a challenging and uncertain environment.”
A Bangor University spokesman added: “This is a UK-wide strike, and we understand the reasons for the action by the Trades Unions.
“We will however be doing all we can to ensure that students are not adversely affected during this period.”