.jpg)
Community hub
Recent from talks
Knowledge base stats:
Talk channels stats:
Members stats:
Common marmoset
The common marmoset (Callithrix jacchus), also called white-tufted marmoset or white-tufted-ear marmoset, is a New World monkey. It originally lived on the northeastern coast of Brazil, in the states of Piauí, Paraíba, Ceará, Rio Grande do Norte, Pernambuco, Alagoas, and Bahia. Through release (both intentional and unintentional) of captive individuals, it has expanded its range since the 1920s to Southeast Brazil (its first sighting in the wild for Rio de Janeiro was in 1929), where it became an invasive species, raising concerns about genetic pollution of similar species, such as the buffy-tufted marmoset (Callithrix aurita), and predation upon bird nestlings and eggs.
The whole genome sequence of a female common marmoset was published on 20 July 2014. It became the first New World monkey to have its genome sequenced.
Common marmosets are very small monkeys with relatively long tails. Males are slightly larger than females; males have an average height of 188 mm (7.40 in) and females have an average height of 185 mm (7.28 in). Males weigh 256 g (9.03 oz) on average and females weigh 236 g (8.32 oz) on average. The pelage of the marmoset is multicolored, being sprinkled with brown, grey, and yellow. It also has white ear tufts and the tail is banded. Its face has black across the nose-area skin and a white blaze on the forehead. The coats of infants are brown and yellow with the ear tuft developing later.
As with other members of the genus Callithrix, the common marmosets have claw-like nails known as tegulae on most of their fingers. Only their halluces (big toes) have the flat nails or ungulae that most other primates have. Marmosets have an arboreal locomotion similar to squirrels. They can hang onto trees vertically and leap between them, and run across branches quadrupedally. Tegulae are an adaptation for this type of locomotion. Other Callithrix traits shared include enlarged, chisel-shaped incisors and ceca specialized for their diet.
Common marmosets are native only to east-central Brazil. They have been introduced into other areas and live within the cities of Rio de Janeiro and Buenos Aires, Argentina. Marmosets can be found in a number of forest habitats. They live in Atlantic coastal forests as well as semideciduous forests farther inland. They can also inhabit savanna forests and riverine forests. Marmosets are successful in dry secondary forests and edge habitats.
The common marmoset's claw-like nails, incisor shape, and gut specialization reflect their unique diet, which is primarily made of plant exudates and insects. Common marmosets feed on gum, sap, latex, and resin. They use their nails to cling to the side of a tree, and with their long lower incisors, chew a hole in the tree. The marmoset then licks up the exudates or swoops them with the teeth. From 20 to 70% of the marmoset's feeding behavior includes eating exudates.
Exudates provide marmosets with a reliable food source in their seasonal habitat. They rely on these foods particularly between January and April, when fruit is not abundant. A marmoset may visit a tree hole multiple times, including those made by other animals. In addition to exudates, insects also prove an important food source for marmosets, making up 24-30% of their food. The small size of marmosets allows them to stalk and ambush them. Marmosets also eat fruits, seeds, flowers, fungi, nectar, snails, lizards, tree frogs, bird eggs, nestlings, and infant mammals. Marmosets may compete for fruit with birds, such as parrots and toucans, and with woolly opossums.
Common marmosets live in stable extended families, with only a few members allowed to breed. A marmoset group can contain as many as 15 members, but a more typical number is nine. A marmoset family usually contains one or two breeding females, a breeding male, their offspring, and their adult relatives, be they their parents or siblings. The females in a group tend to be closely related, and males less so. Males do not mate with breeding females to which they are related. Marmosets may leave their natal groups when they become adults, in contrast to other primate species, which leave at adolescence. Not much is known of the reasons marmosets leave their natal groups. Family groups fuse into new groups when a breeding male dies. Within the family groups, the breeding individuals tend to be more dominant. The breeding male and female tend to share dominance. Between two breeding females, though, one is more dominant. In addition, the subordinate female is usually the daughter of the dominant one. For the other members, social rank is based on age. Dominance is maintained though various behaviors, postures, and vocalizations, and subordinates groom their superiors.
Hub AI
Common marmoset AI simulator
(@Common marmoset_simulator)
Common marmoset
The common marmoset (Callithrix jacchus), also called white-tufted marmoset or white-tufted-ear marmoset, is a New World monkey. It originally lived on the northeastern coast of Brazil, in the states of Piauí, Paraíba, Ceará, Rio Grande do Norte, Pernambuco, Alagoas, and Bahia. Through release (both intentional and unintentional) of captive individuals, it has expanded its range since the 1920s to Southeast Brazil (its first sighting in the wild for Rio de Janeiro was in 1929), where it became an invasive species, raising concerns about genetic pollution of similar species, such as the buffy-tufted marmoset (Callithrix aurita), and predation upon bird nestlings and eggs.
The whole genome sequence of a female common marmoset was published on 20 July 2014. It became the first New World monkey to have its genome sequenced.
Common marmosets are very small monkeys with relatively long tails. Males are slightly larger than females; males have an average height of 188 mm (7.40 in) and females have an average height of 185 mm (7.28 in). Males weigh 256 g (9.03 oz) on average and females weigh 236 g (8.32 oz) on average. The pelage of the marmoset is multicolored, being sprinkled with brown, grey, and yellow. It also has white ear tufts and the tail is banded. Its face has black across the nose-area skin and a white blaze on the forehead. The coats of infants are brown and yellow with the ear tuft developing later.
As with other members of the genus Callithrix, the common marmosets have claw-like nails known as tegulae on most of their fingers. Only their halluces (big toes) have the flat nails or ungulae that most other primates have. Marmosets have an arboreal locomotion similar to squirrels. They can hang onto trees vertically and leap between them, and run across branches quadrupedally. Tegulae are an adaptation for this type of locomotion. Other Callithrix traits shared include enlarged, chisel-shaped incisors and ceca specialized for their diet.
Common marmosets are native only to east-central Brazil. They have been introduced into other areas and live within the cities of Rio de Janeiro and Buenos Aires, Argentina. Marmosets can be found in a number of forest habitats. They live in Atlantic coastal forests as well as semideciduous forests farther inland. They can also inhabit savanna forests and riverine forests. Marmosets are successful in dry secondary forests and edge habitats.
The common marmoset's claw-like nails, incisor shape, and gut specialization reflect their unique diet, which is primarily made of plant exudates and insects. Common marmosets feed on gum, sap, latex, and resin. They use their nails to cling to the side of a tree, and with their long lower incisors, chew a hole in the tree. The marmoset then licks up the exudates or swoops them with the teeth. From 20 to 70% of the marmoset's feeding behavior includes eating exudates.
Exudates provide marmosets with a reliable food source in their seasonal habitat. They rely on these foods particularly between January and April, when fruit is not abundant. A marmoset may visit a tree hole multiple times, including those made by other animals. In addition to exudates, insects also prove an important food source for marmosets, making up 24-30% of their food. The small size of marmosets allows them to stalk and ambush them. Marmosets also eat fruits, seeds, flowers, fungi, nectar, snails, lizards, tree frogs, bird eggs, nestlings, and infant mammals. Marmosets may compete for fruit with birds, such as parrots and toucans, and with woolly opossums.
Common marmosets live in stable extended families, with only a few members allowed to breed. A marmoset group can contain as many as 15 members, but a more typical number is nine. A marmoset family usually contains one or two breeding females, a breeding male, their offspring, and their adult relatives, be they their parents or siblings. The females in a group tend to be closely related, and males less so. Males do not mate with breeding females to which they are related. Marmosets may leave their natal groups when they become adults, in contrast to other primate species, which leave at adolescence. Not much is known of the reasons marmosets leave their natal groups. Family groups fuse into new groups when a breeding male dies. Within the family groups, the breeding individuals tend to be more dominant. The breeding male and female tend to share dominance. Between two breeding females, though, one is more dominant. In addition, the subordinate female is usually the daughter of the dominant one. For the other members, social rank is based on age. Dominance is maintained though various behaviors, postures, and vocalizations, and subordinates groom their superiors.