(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.
Giraffe Reproduction Facts. The breeding season in giraffes can occur at any time during the year. The mating season tends to peak around the dry season at which time female giraffes are able to conceive when they turn around five years old.