Slides are represented in bass tab by slashes, or by the letter s. An up slash / indicates a slide up and a down slash \ indicates a slide down. When found in between two fret numbers, as in the first two instances in the example above, it means you should slide from the first note to the second.
Are bass tabs and guitar tabs the same?
Guitar tabs and bass tabs function in the same way. There are lines meant to represent each open string (so a bass tab has only 4 strings). Then a fret number is placed on each tab to show how to finger the string to play the note.