Wildlife Of Monkeys | Ultra HD net geo wild documentary | wildwide life
Автор: WildWide Life
Загружено: 2023-09-19
Просмотров: 29
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The basic life cycle of a monkey is gestation, babyhood and adulthood, but the length of each of these steps varies based on the type of monkey being described. Monkey gestation can take four to eight months, and monkeys take 18 months to 8 years to reach maturity. After breeding, mature monkeys give birth to one to three babies with one being the most common number.
A snow monkey has a fairly typical life cycle for a monkey. They are born after a short gestation period, and they nurse for about a year. Snow monkeys become adults at age 4, and in captivity, they live up to 30 years.
Some monkeys experience an adolescent phase between being a baby and an adult. For example, the Proboscis monkey stops nursing at seven months old. About five months later when they are 1 year old, young males leave their mothers to hang out with their friends in a group called the bachelor group. Young females, in contrast, stay with the rest of their family in a group called the troop. Although the monkeys are not considered babies during this period, they are not adults either. They spend roughly three years in this role, and they are not ready to breed until they are 4 or 5.
The stages of the life cycle of primates vary considerably in duration. Among the most primitive members of the group, these stages are broadly comparable to those of other mammals of similar size. Higher in the phylogenetic scale, they are substantially extended. The greatest difference is in the duration of the infant and juvenile stages combined; the least is in the gestation period, which, despite the general belief, cannot be consistently correlated with adult body size. Gibbons, which weigh considerably less than macaques, have a 20 percent longer gestation period.
The clear trend toward prolongation of the period of juvenile and adolescent life is probably to be associated with the corresponding trend toward a progressive elaboration of the brain. The extended period of adolescence means that the young remain under adult (primarily maternal) surveillance for a long period, during which time the juvenile acquires, by example from its mother and peers, the knowledge that will allow it to become properly integrated as a fully adult member of a complicated social system. One might therefore expect a close correlation between the period of adolescence, the brain size, and the complexity of the social system; and, insofar as the latter factor can be assessed, this appears to be the case.
The reproductive events in the primate calendar are copulation, gestation, birth, and lactation. Owing to the long duration of the gestation period, these phases occupy the female primate (among higher primates anyway) for a full year or more; then the cycle starts again. The female does not usually come into physiological receptivity until the infant of the previous pregnancy has been weaned.
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