Biological Anthropology Analysis of the Gorilla

Biological Anthropology Analysis of the Gorilla

Gorilla



Biological anthropology is also known as physical anthropologyit is an interesting mixture of social studies and biology of people This study concerned with the biological and behavioural aspects of human beings and their related nonhuman primates and their extinct ancestors To grasp how human evolution occur from earlier life formsprimates Primates include Homo sapiens the apes the monkeys and gorillas we can know about primate behaviour by studying them If I would like to talk about gorilla the largest of the living primatesit is ground dwelling herbivore animal that inhabits the forest of Africa They are also known for their gentle human like behaviour and emotions such as laughter and sadness They even make their own tools to assist them survive in the forest Gorillas are stocky animals with broad chests and shoulders Some of the body parts seem to be same as humans like hands and their small eyes set with hairless faces They play a very important role in local biodiversity roaming through large territories assist humans for example to spread the seeds of fruits they consume

Studies have shown gorilla blood is not reactive to antiA and antiB which would in humans indicate type O blood Moreover like humans gorillas have different finger prints

Classification of Gorillas based on their species

Gorillas are our closest living relative after chimpanzees and bonobos they are divided into two species the eastern gorilla G g diehli and the western gorilla G g gorilla The eastern gorilla consists of two more subspecies These species are the eastern lowland G b graueri and the mountain gorilla G b beringei

Physical description

Gorillas are the largest living primates They are stocky animals with broad chests and shoulders Some of the body parts seem to be same as humans like larger hands eyes face There DNA is 97 98 identical to that of a human There forearms are much shorter than the upper arm The face is black and hairless with small eyes that are close together and prominent nostrils

Adults males are identified by sagittal crest along the midline of the skull and a small are of white hairs on the black that is why they also known as silverbacks Moreover eastern gorillas have darker and longer fur on their arms whereas western gorillas have shorter hairs which grey or brown in colour

Size adult males weigh up to 200kg whereas females have around half the size They can reach the height of 12 to 17 meters when standing on two feet

Social structure of gorillas

They have a welldeveloped social structure They forming stable family groups in which dominant male keep the position for years Usually they are 5 to 10 individuals in one group or vary from 2 to over 50 members Furthermore if any male gorilla leaves the group he wanders alone for many years whereas female gorillas leave their group at maturity to join other group or single males But it is very rare in female gorillas and they reproducing in their original groups

Life cycle of gorillas

Female gorillas become sexually mature at age of 78 years old but they start breeding several years later Whereas males are mature later than females But some of the gorillas starts breeding before the age of 15 years They have high infant mortality There is long gestation to single births 85 months Females generally give birth to three or four babies during their reproductive life

the mortality rate for gorillas is less than one year old is high but for the adults the rate is only 5 In the wild they might live for 40 years old in the united states a captive gorilla was reported to have lived to the age of 54

Reproduction

Female will purse their lips and slowly approach a male while making eye contact This serves to urge the male to mount her If the male does not respond then she will try to attract his attention by reaching towards him or slapping the ground Males incite copulation by approaching a female and displaying at her or touch

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