Dear Jon,while I firmly believe in their being multiple routes to sucess,I strongly disagree with your providence of chicken egg shell as a calcium source for G. albofasciatus as the (eventually) rotting egg shells shall only be a place for harmful bacteria and fungus to grow,leading to nasty infections.I donot believe that geckos in the wild feed on eggs or egg shells of any kind,let alone chicken eggs,getting their required calcium quota from devouring a myriad of insect prey(insects posess a chitinous exoskeleton).We are afterall,discussing geckos,not budgies.Just my two pence,Javed Ahmed.
Dear Javed (and others in order to keep simple husbandry facts straight),
First and foremost, apparently the phonograph has skipped to a different verse on the record. We were discussing lighting and somehow sling-shotted off to calcium supplementation and budgies.
Your two pence has missed this point in my original post - "to provide crushed chicken egg shells once a week, and they foul up after a few days due to the elevated humidity levels of the enclosure, so discard them after a couple of days if not eaten". (fouling up after a few days - yet discarding them after a couple is BEFORE they go bad)
* Next (obvious) point - Yes, nearly all calcareous egg laying species (that would be defined as those gecko species outside of the Aleuroscalabotinae, Diplodactylinae and Eublepharinae - that lay soft egg shells) routinely consume hatched egg shells - particularly the egg shell fragments from eggs of it's own species. Females of many gecko species have been documented returning to communal egg laying areas and witnessed eating egg fragments. In your own country Calodactylodes aureus has been observed doing just that. In fact, this species has been documented with a full lizard egg in its stomach contents! Numerous other references appear in the literature. In captivity nearly all species will do the same if you simply throw the egg shells back in with the egg producing female. Additionally, species of Gekkoninae have evolved endolyphatic sacs - to store excess calcium (ex. when egg fragments are available) in their necks for use later on when needed.
* The next obvious point you missed - my mentioning of other Geckoella keepers outside of India having calcium problems with their females. Some calcium-based item should be added to the artificial diet in captivity to balance the inbalance.
* Another point to consider - geckos are categorically the only lizards that lay calcareous eggs. A chicken egg, or "budgies" (?), are also calcareous eggs. Geckos eat calcareous egg shells and if you do not have any eggs from your first breeding of Geckoella - offer them some chicken egg shells instead.
* Final point - I've kept and bred numerous gecko species over the last 28 years, Geckoella included, and I've never had a single infection or problem due to offering chicken egg shells to geckos in captivity. Nearly all reproductively active females will voluntarily eat it. I raise my own chickens, harvest the eggs for human consumption, keep the egg shells and grind them up and offer them to most of my 250 species of geckos that I presently keep. I've did that for nearly 30 years and it works.
If you still do not believe that geckos routinely consume hatched egg shell fragments, please visit the Calodactylodes in your country and tell them they are not supposed to visit their communal egg laying spots and eat the egg shells and see what they have to say about it. They are, afterall, a very vocal species;-)
Looking forward to the natural history notes, and just keepin the facts straight,
Jon
ps. I just double-checked my original post and my introductory sentence stated "these are a few of my observations and experiences". They've worked and produced offspring. Why pick apart a recipe for success without putting forward your own experiences?