I've had all of my original D. galactonotus, D. imitators, and D. auratus for 7 to 8 years now. There was a poll once on one of the forums, and I believe some of the oldest tincs were about 15 years old, so most of the captive bred darts seem to live a long time after they make it through the first year or two. I don't think the wild caught frogs are as long-lived in captivity, but then, it's impossible to tell how old they were in the first place. But you can probably plan on having your tinctorius live a long time, barring accidents or introduced infections, and especially stressful situations, provided their basic requirements are met. They are pretty hardy fellows, over all.
-----
Patty
Pahsimeroi, Idaho
4 D. auratus blue
6 D. galactonotus pumpkin orange splash back
7 D. imitator
6 D. leucomelas
6 D. pumilio Bastimentos
4 D. fantasticus
6 P. terribilis mint and organe
4 D. reticulatus
4 D. castaneoticus
2 D. azureus
4 P vittatus
2 P. lugubris