(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.
reproduction the pikas mating season is from april to july they may breed twice a year depending on their location the gestation period is thirty days long one month pika s will give birth to a litter of 2 5 young the young are completely dependent on their mother for at least 18 days the have a fast growth rate and reach adult size when they are only 3 months old the female weans the young at 3 to 4 weeks after birth