biology a2 social behaviour in gorillas

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Social behaviour is the organisms of a species living together in groups with defined roles for each
member in the group
Hierarchy in the group exists where individuals have a place and order of importance in the group, e.g.
higher up get more food, rights to mate with other individuals, etc.
Live in stable groups of ten, one mature dominant male (silverback) adult females and offspring. The
male protects other members of the group and leads them in search of food and is the only male that
mates with mature females, younger males reach sexual maturity and leave the group alone until they're
mature enough to attract females, as younger females mature they either stay with the same group or
join another.
They pick the parasites from fur of another and reinforces relationships/
During the first 5 months and infant is in constant contact with the mother and suckles at hourly intervals,
by 12 months the infants venture as far as 5m away.
Communication exists, calls, displays and grunts signal danger to members, threats to predators and
other groups.
Females give birth to only one/few infants at one time so the maternal care and group
protection enhances survival rate of the young
The young learn through observation and play with members of the group, learned behaviour is
vital to survival of primates
Large brain size allows slow maturation of primates, the security of a group enhances survival
rate and learning of immature young
Knowledge and protection of food sources is shared in group
Ability to detect/deter predators achieved by groups of members working together, is greater


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