(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.
Tiger courting process. Tigers donât have a set season for reproduction to take place. Instead they are able to engage in the activities throughout the year. However, most of the time it will occur from late November through early April. Males are ready to mate when they are approximately 5 years of age. For females it is about 3 Â½ years of age. During the courting process you may hear tigers making a variety of howls and whines for each other. The males usually start this off but the females are very likely to respond.