Guiana red-backed kaki
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Guiana red-backed kaki ( Chiropotes sagulatus ) |
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| ( Traill , 1821) |
The Guiana Red-backed Kaki ( Chiropotes sagulatus ) is a species of primate from the family of the Sakia monkey (Pitheciidae) that occurs in northeastern South America . The species was separated from the red-backed kaki ( C. chiropotes ) only in 2002 , as it differs from this species both in terms of coat color and genetically.
features
Guyana red-backed sakis reach a head-trunk length of 36 to 46 centimeters (males) or 33 to 43 centimeters (females), the tail measures 39 to 46 centimeters and the weight is around 3 kilograms. Your back and upper limbs are reddish brown to orange in color, the head, neck, lower legs and forearms are blackish.
distribution and habitat
light blue - Guayana red-backed kaki ,
purple - red-backed kaki ,
yellow - Satan monkey ,
red - white-nosed kaki ,
green - Uta-Hick-Saki .
Guiana red-backed sakis are native to northeastern South America. Their distribution area includes the mountainous region of Guiana east of the Rio Branco and extends in the south to the northeastern Amazon basin. The southern border of the distribution area forms the Amazon east of the confluence of the Rio Negro and the lower reaches of the Rio Negro east of the confluence of the Rio Branco. The habitat of the Guiana Red-backed Saki are tropical rainforests, where they are mainly in the upper tree layer .
Way of life
The Guyana Red-backed Saki lives in small (from two specimens) or larger groups with several males and females. The largest group observed in Guyana comprised 65 animals. The groups can also divide into smaller groups or reunite from these. So far there are no indications of a hierarchical order between the males. As the primatologists Marc van Roosmalen and Russell Mittermeier found during their observations, the Guyana red-backed sakis spend about 30% of their time near groups of other primate species, including brown capuchins ( Cebus olivaceus ), hooded capuchins ( Sapajus apella ) and common squirrel monkeys ( Saimiri) sciureus ).
The Guyana red-backed kaki feeds mainly on hard-shelled seeds and fruits. In studies in Brazil, Guyana and Suriname, seeds accounted for 63 to 86% of the food consumed, while the proportion of fleshy fruits was 9 to 28% and that of flowers 1 to 11%. The proportion of leaves was between 0 and 11% and that of arthropods between 0 and 10%. Main suppliers of food eaten plants are sapotaceae , lecythidaceae and Mulberry family . Overall, however, their diet is very varied and studies north of Manaus found that 112 different plant species were consumed, in Guyana even 175 plant species were identified. The remains of a total of 133 insects from eight orders and ten families were found in an examined stomach of an adult male. The most common groups were the larvae of borer and weevil , as well as ants. Another study of four stomachs found insects from six orders, mainly beaked bugles , two-winged flies and humpback flies .
The young are born during the beginning of the dry season. This is the time of year when the range of fruits is greatest.
literature
- SF Ferrari, LM Veiga, LP Pinto, LK Marsh, RA Mittermeier, AB Rylands: Family Pitheciidae (Titis, Saakis and Uacaris). In: Russell A. Mittermeier , Anthony B. Rylands, Don E. Wilson : Handbook of the Mammals of the World. Volume 3: Primates. Lynx, Barcelona 2013, ISBN 978-84-96553-89-7 , p. 481.