(of an organism or tissue) living in the absence of air or free oxygen. pertaining to or caused by the absence of oxygen.
Parakeets can breed year round if conditions are right in their environment. Normal breeding season begins early in the year and continues until fall. It is very rare to see parakeets mating, but a male and a female must mate to keep the eggs fertile.
Laying eggs. Parakeet egg laying will start in about one or two days after the mating. Female parakeet will lay an egg every second day and there will be approximately 4 to 9 of them.