Sites of star formation in the tidal structures
  We give a short review of the current results of studying of star formation
sites observed beyond the main discs of galaxies in different interacting
systems: Arp 270, Arp 194, Arp 305, NGC 4656 and NGC 90. The observations were
carried out at the 6-meter telescope BTA in SAO RAS with the SCOPRPIO-2
spectrograph. The properties of star forming islands, their mass, dynamics,
chemical abundances, their possible fate and the mechanisms inspiring star
formation, appear to be different in different systems.
