marmosets guard a territory of less than an acre. They are nervous
creatures, and dart around in the underbrush.
Their territory is based on sap producing trees. If a tree stops producing
sap, the pygmy marmoset group immediately leaves the area, and sometimes
they may even venture out of the territory. Since the territories are
not contiguous, other groups dont
usually meet. Within one group, only one female bares young. Some scientists
believe that she only mates with one male, or is monogamous.
Some scientists insist that she mates with more than one male, which would
suggest a polyandrous mating system.
Baby marmosets require constant care for the first two weeks, although
they need to be nursed for the first three weeks. The father, and other
adults take care of the baby so that the mom can rest. They are altricious:
naked, blind and depend on their parents for survival, they are usually
carried on the father's back.
young are sexually mature at 12-18 months they reach adulthood at age
The dominate female usually has twins, although the mom can rarely feed
them both, and triplets dont usually survive in the wild. A mom
can have another baby in 5-7 months. The dominant
female creates a hormone that suppresses ovulation in other females. During
courtship, pygmy marmosets present
their genitals by turning the anal
region toward the receiver, and raising the tail so that genitals
are showing. Only the callitrichid
species performs genitals presentation.
When done, it is because they do not like the male, and do it in defense.
marmosets are highly sociable, and often interact during feeding on sap.
Olfactory communication is when
a pygmy marmoset rubs the circum-anal areas in the ground or branch to
mark its territory, although the pygmy marmoset rarely ventures
down to the ground. There are many types of communication. One is called
the open mouth trill. During the time
this is happening the lips are partly open and the tounge vibrates between
them. Another trill is the closed mouth
trill. This can be heard only when the
marmoset is calm, and moving through their enviorment. The twitter
is another call that tells the other marmosets they give in.
Pygmy marmosets live in groups of 5-12 marmosets. Between 4 to 5 adults
live in one group, and the rest are young. Pygmy marmosets live up to