do I need work permit for postdoctoral research position?

[gdubinina]

Could somebody tell me, do I need work permit for postdoctoral position in Canada, it is like training position. In USA I have J-1 research visa (it is not working visa) for such position. Is it enaugh to apply for multiple visa and not apply for work permit to enter in Canada and work as postdoctoral research? I DIDN'T FIND ANYTHING AT THE CONSULATE'S SITE ABOUT IT, JUST INFO THAT FOR SOME TYPES OF JOBS YOU DON'T NEED WORK PERMIT, BUT WHAT THE TYPES OF JOB?