(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.
The alligator mating season runs from April through July. Although alligators don't have any huge behavioral changes, some changes do occur during their mating season that pet owners should be aware of. Males are more likely to become territorial during mating season.