- egg incubation -
This Angulate baby decided to turn around and stay a bit longer inside the shell. He crawled out of the egg the following day.
Angulate egg incubation
Incubation techniques for Angulate / Angulated / Bowsprit tortoise (Chersina angulata) eggs vary among breeders. Some use a cooling period before incubation and others don't. Same for drop in temperature for nights, some keepers do it and some don't.
Here are some examples of published incubation temperatures and humidity levels. For full details, please read the original publications.1.) Thomas Bauer (Turtles, Proceedings: International Turtle & Tortoise Symposium Vienna 2002, 2006)
- Egg box is filled with slightly damp, sterilized soil. Eggs are placed in shallow depressions, but not buried. Eggs are incubated at 27-30 °C (80.6-86 °F) with 85% humidity. Incubation lasts 110-125 days.
2.) Luke Caroldi (TartaClubItalia.it, 8/2011)
- Reported incubation temperature for Angulates was 30 °C (86 °F).
- Eggs are incubated on vermiculite at 30 °C (86 °F) with 80-90% humidity. Incubation lasts 95-127 days.
- Eggs are incubated at 30 °C (86 °F) with 60-65% humidity. Incubation lasts 90-100 days.
5.) Irmtraud Jasser-Häger & Hans-Dieter Philippen (Testudo magazine, Schildkröten Interessengemeinschaft Schweiz, SIGS.ch, 6/2003)
- Eggs are incubated at 28-31 °C (82.4-87.8 °F) on dry gravel (Kies) with about 80% humidity. Incubation lasts 90-120 days.
- Eggs are incubated at 30.5-31 °C (86.9-87.8 °F) with 95-97% humidity in a water incubator. Reported incubation lasted 101 days.
- Eggs are incubated at 27-30 °C (80.6-86 °F). Incubation lasts 95-127 days.
8.) Turtle Survival Alliance (TSA journal, 8/2007)
- Turtle Conservancy's Behler Chelonian Center (TC-BCC) hatched their first Angulate tortoise in 2007. This egg was incubated at 30 °C (86 °F) in a closed plastic container using vermiculite, mixed with water in a 5:1 ratio, as the substrate. Incubation lasted 96 days.
- Eggs are incubated at 31 °C (87.8 °F) for 20 hours a day and at 25 °C (77 °F) or below for the rest of the day. Humidity is kept above 50%. Incubation lasts about 120 days.
Angulate mama pushing her egg out. It's hard work and can take a long time because the egg is so big and the bony opening so small. When she pushes, her head goes all the way into her shell as you see above.
Angulates lay only one, but large, egg at a time.
Mama with her huge, freshly laid egg. After removing the egg, I let her fill the nest hole in peace.
Almost ready to come out of the egg.
Brand new Angulate baby.