![]() ![]() The taxonomy of apes (hominoids), according to the Integrated Taxonomic Information System (ITIS), is: Some apes can take as long as 12 to 18 years to fully develop into an adult. Apes also take much longer to mature than other animals. ![]() Unlike other animals, apes take care of their young for many years. They also breastfeed their young for an extending amount of time, like humans. They have live births after a gestation period of around eight and a half to nine months and typically give birth to only one or two babies at a time. (Image credit: Kwita Izina) OffspringĪpes have offspring much like humans. Mountain gorillas only weigh four pounds when they're born. A chimp's diet is mainly fruits supplemented with insects, birds and small mammals, according to the Center for Great Apes. Orangutans eat a fruit diet that is supplemented with vegetation, invertebrates, mineral-rich soil and small vertebrates. Gibbons, for example, eat mostly fruit, but they also munch on leaves, flowers and insects. DietĪpes are herbivores for the most part, but they also may eat small animals or bugs to supplement their diet. In fact, only 3 percent of the animal kingdom practices monogamy, according to the Anthropological Institute of University Zürich-Irchel Winterthurerstrasse. ![]() Gibbons are monogamous, which is very rare in the animal kingdom. At night they sleep in nests made from branches or foliage on the ground or in trees. Chimpanzees are the most social of all the apes, and live in communities with 15 to 120 individuals.ĭuring the day ape families eat, play and protect each other. Gorillas live in family groups that can include as many as 30 members. Siamangs are so close that they almost never wander more than 30 feet (10 m) apart, according to the San Diego Zoo. Gibbons, for example, live in small family groups of two to six individuals. (Image credit: © Terry Whittaker, One-Time Use Only.) HabitsĪ group of apes is called a tribe or a shrewdness. These results suggest that brain weight declines moderately with age in the chimpanzee as it does in humans.An adult male northern white-cheeked gibbon ( Nomascus leucogenys) found in northern Vietnam and Laos. When the effect of sex on brain weight was statistically controlled for, the loss of brain weight with age was 0.9 g/year (P = 0.07). Simple linear regression performed on the combined material from females and males aged 7 years and older revealed a decline in brain weight with advancing age of 1.1 g/year (P < 0.05). This sex difference was statistically significant (P < 0.01). The adolescent and young adult chimpanzees had the largest brain weights in these two age groups combined, the mean brain weight (+/- standard deviation) was 368.1 g (+/-37.3) for females (n = 17) and 405.6 g (+/-39.4) for males (n = 17). Adult brain weight was achieved by the age of 7 years. The brains were taken from 9 infants (birth to 1 year of age), 25 juveniles (1-7 years), 13 adolescents (7-15 years), 21 young adults (15-30 years), and 8 old adults (over 30 years). We examined fresh brain weights from 76 chimpanzees ranging in age from birth to 59.4 years of age. The survival analysis revealed the maximum life spans of female and male chimpanzees to be about 59 and 45 years, respectively. To place the study in context of the empirical life expectancy of the chimpanzee, we first performed a survival analysis on data from 275 chimpanzees that were maintained in the colony of the Yerkes Primate Center. In view of these contrasting results, we examined the pattern of brain weight across the life span in the chimpanzee, one of the closest biological relatives of humans. Studies on human postmortem material report lower brain weights in older than in younger cohorts, whereas there is no apparent change with age in the rhesus monkey. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |