Bearded emperor tamarin

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Bearded emperor tamarin
Tamarin portrait 2 edit3.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Primates
Suborder: Haplorhini
Infraorder: Simiiformes
Family: Callitrichidae
Genus: Saguinus
Species:
Subspecies:
S. i. subgrisescens
Trinomial name
Saguinus imperator subgrisescens
(Lönnberg, 1940)
Saguinus imperator range map2.png
Ranges of both subspecies of the emperor tamarin; bearded emperor tamarin in dark green and black-chinned emperor tamarin in lighter green

The bearded emperor tamarin (Saguinus imperator subgrisescens) is one of the two subspecies of the emperor tamarin. It is mostly found in the tropical forests of southwestern Brazil and eastern Peru. This omnivorous member of the Callitrichidae family is usually found in groups of 4 and shares social relations with other callitrichids. They communicate vocally, as well as with olfactory signals. Males tend to be primary caregivers for their young. It is considered as a species of Least Concern by the IUCN, despite threats from increased habitat loss.

Contents

Behavior

Diet and feeding habits

This subspecies of tamarin is omnivorous, and feeds on fruit, nectar, tree sap, flowers, and fungi, as well as small animals like insects, snails and frogs. [2] It especially enjoys tree sap (or gum) in the late dry season and early wet season. [3] To access this resource, the bearded emperor tamarin uses existing or healing holes made by other tamarin species, rather than digging its own. [2]

Social behavior

Bearded emperor tamarin social groups average 4 individuals that sleep in close quarters under the cover of isolated vine-covered trees. [3] However, they also share territory and social relations to other species of callitrichids, such as with the Brown-mantled tamarin, which they are dominant to. [3] They also tend to share such ties with the red-bellied titi monkey, albeit less frequently. [3]

Vocalization

This subspecies of emperor tamarin communicates amongst themselves extensively via vocalizations, such as whistles, chirps and long, descending whistles. [3] When in proximity to territorial boundaries, their presence and its delimitations are announced via louder vocalizations. [3]

Also, the calls of this subspecies sometimes get answered by those of the Brown-mantled tamarin, with the opposite also being true, indicating their close relationship. [3]

Chemical communication

The bearded emperor tamarin is known to rely heavily on chemical odour signals, composed of different arrangements of 123 different volatile compounds [4] to communicate and mark territory. [5] These compounds mainly include hydrocarbons, alcohols, aldehydes, and ketones. [4] Typically, these scents are produced via their well-developed vomeronasal organ and three specialized glands present in the anogenital, suprapubic, and sternal areas of their bodies. [5] These scented secretions are deposited directly in the environment, or on another member of their species, which happens to advertise an individual's identity or status, to mark or defend territory and to signal the geolocation of food resources. [5]

A Bearded Emperor Tamarin moving along lower-lying branches of a tropical forest. Saguinus imperator subgrisescens walking.jpg
A Bearded Emperor Tamarin moving along lower-lying branches of a tropical forest.

These marks are a form of durable communication, as these olfactory cues stay behind long after a group has left the scene, in contrast with temporary visual or acoustic signals. [5]

One specific documented use of such olfactory communication can be found in the way a dominant female will release certain pheromones within her territory to prevent subservient females in her group from breeding. [3] Females also exclusively produce the longifolene compound, while males were shown to secrete no unique chemical in one study. [4]

In fact, females secrete significantly more olfactory markings than males, and individuals of reproductive age also produce more than juveniles or subordinates. [4] This indicates the reproductive importance of olfactory markings. [4]

Breeding

Typically, only one pair of bearded emperor tamarins of their respective social group will reproduce. [2] As such, the dominant female often births twins, which are carried by the breeding male until they are 70 days old, only passing them back to their mother for feeding. [2]

The babies mature after 12–18 months and reach peak maturity at the age of 2. [2]

Range

The bearded emperor tamarin's range includes territories in western Brazil and Peru [6] while also occasionally being found in Bolivia. [2] In Brazil, its range includes: the Upper Rio Jurua region in the southwest of Amazonas state and to the east of Acre state. [6] In Peru, it inhabits the upper Rio Ucayali and Urubamba basins in the Loreto province and the upper Rio Madre de Dios basin in Madre de Dios; it is sometimes seen in the bordering Cusco Department. [6]

Habitat

This subspecies tends to inhabit primary and secondary lowland evergreen and broadleaf tropical rainforests. [2] They mainly use the bottom 300 m (980 ft) of the canopy to move around and feed. [2]

Taxonomy

The bearded emperor tamarin and black-chinned emperor tamarin populations of the emperor tamarin were formally differentiated as distinct subspecies of in 1977. [6]

The main evolution in morphological traits, compared to other tamarins, consists of a hypertrophied mustache, which they share with their last common ancestor. [6] This is seen as a first grade of facial hair modifications (seen in black-chinned emperor tamarin, whereas this subspecies' advanced another grade by the formation of prominent chin whiskers and concealment or deterioration of the black chin patch found in the earlier form. [6]

Further distinctions include the repartition of pheomelanin on different parts of their bodies, which is responsible for yellow-reddish color (such as in freckles), as well as different color-saturation and bleaching in others parts. [6]

Conservation status

The bearded emperor tamarin is listed as Least Concern by the IUCN, but it is slowly becoming in danger of extinction through destruction of habitat. [1] Many live in zoos or are illegally sold as pets.

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<span class="mw-page-title-main">Geoffroy's tamarin</span> Species of New World monkey

Geoffroy's tamarin, also known as the Panamanian, red-crested or rufous-naped tamarin, is a tamarin, a type of small monkey, found in Panama and Colombia. It is predominantly black and white, with a reddish nape. Diurnal, Geoffroy's tamarin spends most of its time in trees, but does come down to the ground occasionally. It lives in groups that most often number between three and five individuals, and generally include one or more adults of each sex. It eats a variety of foods, including insects, plant exudates, fruits and other plant parts. Insects and fruits account for the majority of its diet, but exudates are also important. But since its teeth are not adapted for gouging trees to get to the sap, it can only eat exudates when they are easily available.

<span class="mw-page-title-main">Tamarin</span> Genus of New World monkeys

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<span class="mw-page-title-main">Cotton-top tamarin</span> Species of New World monkey

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<span class="mw-page-title-main">Emperor tamarin</span> Species of New World monkey

The emperor tamarin is a species of tamarin monkey allegedly named for its resemblance to the German emperor Wilhelm II. It lives in the north Brazilian states of Acre and Amazonas and the southwest Amazon Basin, in east Peru, north Bolivia.

<span class="mw-page-title-main">Golden-handed tamarin</span> Species of New World monkey

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<span class="mw-page-title-main">Black-mantled tamarin</span> Species of New World monkey

The black-mantled tamarin, Leontocebus nigricollis, is a species of saddle-back tamarin from the northwestern Amazon in far western Brazil, southeastern Colombia, north-eastern Peru and eastern Ecuador.

<span class="mw-page-title-main">Black tamarin</span> Species of New World monkey

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The black-chinned emperor tamarin is one of the two subspecies of the emperor tamarin. Unlike the bearded emperor tamarin, it has no beard. It is distributed throughout the rainforests of Brazil, Peru, and Bolivia. Not much on its conservation is known, so it is listed as Data Deficient by the IUCN. After a gestation period of 140–145 days, females usually give birth to one or two young. It is the same size as the emperor tamarin and it eats almost the same food: bugs, spiders, fruit, tree sap, and nectar.

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References

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  2. 1 2 3 4 5 6 7 8 Prince, Carol (n.d.). "Bearded Emperor Tamarin - Saguinus imperator subgrisescens". Marwell Zoo. Retrieved 2022-11-29.
  3. 1 2 3 4 5 6 7 8 Bairrao Ruivo, Eric; Stevenson, Miranda F. (2017). EAZA Best Practice Guidelines for Callitrichidae (PDF) (3rd ed.). EAZA.
  4. 1 2 3 4 5 Poirier, Alice C; Waterhouse, John S; Dunn, Jacob C; Smith, Andrew C (2021-01-01). "Scent Marks Signal Species, Sex, and Reproductive Status in Tamarins (Saguinus spp., Neotropical Primates)". Chemical Senses. 46. doi:10.1093/chemse/bjab008. ISSN   0379-864X. PMC   8130507 . PMID   33704442.
  5. 1 2 3 4 Poirier, Alice (2020). "Scent-marking behaviour and semiochemistry in the Callitrichidae". doi:10.13140/RG.2.2.29297.30563.{{cite journal}}: Cite journal requires |journal= (help)
  6. 1 2 3 4 5 6 7 Hershkovitz, Philip (1979). "Races of the emperor tamarin,Saguinus imperator Goeldi (Callitrichidae, Primates)". Primates. 20 (2): 277–287. doi:10.1007/BF02373379. ISSN   0032-8332. S2CID   46660853.