In artificial incubation of astacid crayfish eggs, it is known that fungi can grow over nonviable eggs and invade healthy ones (Celada et al.
Stage-2 juveniles produced by artificial incubation must be removed by hand from incubators, and this occurs usually at the end of incubation, when the first moult period concludes.
A crested ibis chick hatched Friday morning at a center on Sado Island, Niigata Prefecture, becoming the third chick born at the center this year and the sixth ever through artificial incubation
of eggs, center officials said.
Personnel at the Sado Crested Ibis Conservation Center plan to collect the egg laid Sunday by the ibis Yang Yang on Tuesday for artificial incubation
, they said.
The four eggs were laid between March 26 and April 3, when they were carefully removed from the nest and placed under artificial incubation.
Yu Yu was the first ibis to be born under artificial incubation in Japan.
The ibis, named Yu Yu, was hatched at the center May 21 through artificial incubation
, from an egg produced by two birds donated by China.