Many zoos join an international breeding programme to maintain a viable population and prevention of inbreeding. [1] Animals that can no longer contribute to the breeding programme are less desirable and are often replaced by those that are. [2] [3] Sometimes a zoo kills an animal, if it can not find another place for the animal.
Among zoos females tend to be more desirable than males. [4] One explanation is that the males can contribute to the birth of many young ones in a short period, while the females have to carry pregnancy. Another explanation is that birth of a baby animal draws an increased public interest.
Many zoos join an international breeding programme to maintain a viable population and prevention of inbreeding. [1] Animals that can no longer contribute to the breeding programme are less desirable and are often replaced by those that are. [2] [3] Sometimes a zoo kills an animal, if it can not find another place for the animal.
Among zoos females tend to be more desirable than males. [4] One explanation is that the males can contribute to the birth of many young ones in a short period, while the females have to carry pregnancy. Another explanation is that birth of a baby animal draws an increased public interest.