If you're asking if choke works for buckshot, as well as bird, yes, it does. If you're asking which is best? You'll have to pattern your gun with your load, to find out for sure. If you're asking are there special chokes for buckshot? Probably so, but I never really looked into them. Modified/full was always good enough for me.
Generally speaking though, a tighter choke shoots better patterns. I've hunted deer using hounds, with shotguns and buckshot for years. I'd be willing to bet that 95% of the fellows I hunted with used either a full or a modified choke. They used for the most part No 1 buckshot, or 000. 00's were few and far between, and No 4's even fewer. I don't know of anybody who used an improved cylinder or cylinder choked gun, but there might have been one at some time.
Those open chokes might work well for home defense ranges, but when you want to reach out, you need some choke.