Can a fish hold its breath, and do insects show signs of aging?
Birth rates in primates depend on a variety of social and environmental factors as well as species-specific factors, and differ enormously as a result. Many monkeys, for instance, produce offspring every year, while great apes have much longer intervals between births – chimpanzees have one infant every five years; orangutans one every eight years.
Apes are particularly slow to breed due to their large body sizes, slow rates of maturation and long lifespans. A female’s dominance rank and the quality of the food available in her home range will also impact her ability to reproduce. She will therefore only give birth to a handful of offspring that will survive to adulthood across her lifetime, even in the absence of anthropogenic pressures and threats. This makes apes particularly vulnerable, as their biology makes it difficult for them to recover from even small declines caused by human activities. Liz Greengrass
Female bonobos have five or six offspring in their lifetime, caring for each youngster until it reaches four or five years of age.