After some unfertilized eggs got some development in D. Tinctorius eggs.
The oldest clutch is about 3 weeks old but in Poison Frogs by
Biology, Speciea & Captive Husbandry Lotters, Jungfer, Henkel & Schmidt / Chimaira are said to hatch 10-12 days. I see development but no movement in the eggs. Just curious if they'r going well
Mine D. Tinctorius prefer film canisters, saw no eggs under the cocohuts with petri dish.
The oldest clutch - more than 3 weeks - definitely dead. White dots are collembola or mites - i don't know, the'r tooooooo smal
Clutch №2, about two weeks old.
Tadpoles are about 7mm
№3. Add one more week. Best seen on white
The latest one, eggs are black, flashlight changed the coloration.
The first clutch looks bad, but the other two seem fine. I find it's not very easy to work with D. tinctorius eggs when they are laid in film canisters, so you may want to remove them. The frogs will get used to laying on a petri dish in the coco-hut, which will work a lot better for you in the long run.
If you want to raise the tadpoles outside the vivarium, you can take the canisters out and lay them on their side in a dish with a small amount of water (not enough to cover the eggs). When they eggs hatch, the tads can be moved to their growing containers.
Wow! 4 weeks and still in the egg seems to be a long time. Mine generally take about 2 weeks, give or take a few days. I'm not sure what could make them take so long...perhaps temps? If so, mine are kept in the 70's if that helps. You may want to do a slow temp change, a radical jump probably wouldn't be good.
14 days is what most would say to be in the normal range, but there are exceptions. I haven't had eggs take that long to hatch out, but did have a tad in the water for 6 months that came onto land just fine. I'd just wait and see what happens. There's not much you can do at this point. Let mother nature take it's course and just go along for the ride.
What type of container is best to raise tinc tadpoles in? I successfully raised a single tadpole, but now I have many and I've been reading on this site about growth hormone inhibition. Can I just use small plastic cups, or do they need something bigger?
Tinc tads are known not only for secreting hormones that will inhibit the growth of other tads, but also for their tendency to be cannibalistic. So, although some have reported success raising them together...I find it best not to take chances and raise each tad separate.
You also want to have lids available for when they sprout legs (just in case they start to climb the sides before you notice). Josh's vented fruit fly lids will fit these containers, or you can get the solid plastic ones that they sell and poke holes in them which ends up a little cheaper.
I've also heard of people using regular small plastic drinking cups or plastic butter bowls, etc to raise tads. Just be sure that you have a lid that fits it. Nothing would be worse than spending 2 months (or more) raising a tad only to have it escape and die.