29. Jun, 2017

Eggs in summer

Some week ago, on his daily round, Nick discovered eggs laid in the land compartment of the housing of the adult couple Vietnamese pond turtle, Mauremys annamensis. The first major achievement of the ReHerp project was there. Since the eggs were buried on the very bottom of the compartment some 20 cm in depth, they might have escaped earlier attention. Eight good looking eggs could be retrieved. In some of these embryonic discs were already visible giving support to the idea that the eggs might have been deposited some days prior to discovery. Since temperature and humidity in the housing are completely in the safe range no complications are to be expected.

Since our incubator, a donation of the Medical Instrumental Department (MID) of the Langeland Hospital, was not yet completely fine-tuned at that time, the eggs were temporarily placed in the incubator of Serpo, partially buried in vermiculite at a temperature of 29 °C. A couple of days later our own incubator was up and running so that the eggs could be transferred to it.
We were not able to find any suitable data on this species in literature as to the details of breeding of the eggs. Therefore we rely on the data of related species and anticipate an incubation time of 70 – 90 days. We don’t know what sex ratio we can expect. Higher incubation temperatures usually lead to more females than males but the break-even point for this species is not known to us. In addition related species sometimes produce additional clutches in some two weeks intervals. We therefore keep our eyes open and regularly check the housing. The parents are fully active in every aspect. We wait and see.