In 'The Visitor' Nog has aged as much as anyone else. I'll assume roughly the same as a human lifespan.
Probably longer than humans. Because everyone lives longer than humans. Even violence prone Klingons.
After I read your reply I reread the post that I was initially replying to. I don't know what Legends of the Ferengi is and didn't understand the reference to it in the initial post. I was very confused, hence my post...
I would say they'd live less time than humans but knowing Trek and it's bias towards humanity it's gonna be longer! JB
Ferengi. I would think that in the Trek universe, human life expectancy would be as close as is possible to life span. It seems that almost every person who has a natural death is quite elderly.
given its ferengi were talking about. life expectancy would depend on what the individual could afford
Ishka is over a hundred years old (odd, since Quark and Rom are both inferred to be in their thirties and forties) in The Magnificent Ferengi. Zek is at least 85 years old in The Nagus, although presumably older, since that's only how long he has been without a vacation. Bashir, in cut dialogue, according to MA, referred to a 120-year-old Ferengi as remarkably old, which implies a slightly younger age than humans (120 is implied as a ripe old age, but we also see a certain 137-year-old at one point).
...We never learn whether 137 years is "remarkable" for a human, strictly speaking, but Data does seem to consider it worth a remark. In turn, 140 is what Miles O'Brien hopes to achieve, suggesting if not confirming it is higher than most folks reach. Doesn't mean that anything beyond 100 wouldn't count as good going. But we can believe in slight differences between the Ferengi and the humans here if we want to. What seems suggested for both is that generations are disproportionately rather than proportionally longer, with the long-lived males and perhaps also females waiting for much longer than 25 or even 35 years on the average before procreating. Might be vitally important lest the not yet dead crowd the respective planets... Is that what precludes immortality, too? Could medicine keep the individuals of each species alive for centuries, but practical concerns result in the evolution of compensating mechanisms (Klingons kill each other, humans delay procreation and then do their not-afraid-of-death voluntary departure, Ferengi establish mandatory retirement age without benefits, etc)? Timo SaloĊiemi