scholarly journals Development from birth to sexual maturity in a semi-free-ranging colony of mandrills (Mandrillus sphinx) in Gabon

Reproduction ◽  
1992 ◽  
Vol 95 (1) ◽  
pp. 129-138 ◽  
Author(s):  
E. J. Wickings ◽  
A. F. Dixson
Keyword(s):  
Sexual Maturity ◽  
Mandrillus Sphinx ◽  
Free Ranging

scholarly journals Factors affecting fecal glucocorticoid levels in semi-free-ranging female mandrills (Mandrillus sphinx)

2008 ◽  
Vol 70 (11) ◽  
pp. 1023-1032 ◽  
Author(s):  
Joanna M Setchell ◽  
Tessa Smith ◽  
E Jean Wickings ◽  
Leslie A Knapp
Keyword(s):  
Factors Affecting ◽  
Mandrillus Sphinx ◽  
Free Ranging ◽  
Fecal Glucocorticoid

Sequences and Timing of Dental Eruption in Semi-Free-Ranging Mandrills (Mandrillus sphinx)

2004 ◽  
Vol 75 (3) ◽  
pp. 121-132 ◽  
Author(s):  
Joanna M. Setchell ◽  
E. Jean Wickings
Keyword(s):  
Mandrillus Sphinx ◽  
Dental Eruption ◽  
Free Ranging

scholarly journals Simian Homologues of Human Gamma-2 and Betaherpesviruses in Mandrill and Drill Monkeys

2000 ◽  
Vol 74 (24) ◽  
pp. 11993-11999 ◽  
Author(s):  
Vincent Lacoste ◽  
Philippe Mauclere ◽  
Guy Dubreuil ◽  
John Lewis ◽  
Marie-Claude Georges-Courbot ◽  
...  
Keyword(s):  
Central Africa ◽  
Primate Species ◽  
Consensus Primer ◽  
Mandrillus Sphinx ◽  
Mandrillus Leucophaeus ◽  
Pcr Method ◽  
Free Ranging ◽  
Human Herpesviruses ◽  
Green Monkeys

ABSTRACT Recent serological and molecular surveys of different primate species allowed the characterization of several Kaposi's sarcoma-associated herpesvirus (KSHV) homologues in macaques, African green monkeys, chimpanzees, and gorillas. Identification of these new primate rhadinoviruses revealed the existence of two distinct genogroups, called RV1 and RV2. Using a degenerate consensus primer PCR method for the herpesvirus DNA polymerase gene, the presence of KSHV homologues has been investigated in two semi-free-ranging colonies of eight drill (Mandrillus leucophaeus), five mandrill (Mandrillus sphinx), and two hybrid (Mandrillus leucophaeus-Mandrillus sphinx) monkeys, living in Cameroon and Gabon, Central Africa. This search revealed the existence of not only two distinct KSHV homologues, each one belonging to one of the two rhadinovirus genogroups, but also of two new betaherpesvirus sequences, one being close to cytomegaloviruses and the other being related to human herpesviruses 6 and 7 (HHV-6 and -7). The latter viruses are the first simian HHV-6 and -7 homologues identified to date. These data show that mandrill and drill monkeys are the hosts of at least four novel distinct herpesviruses. Moreover, mandrills, like macaques and African green monkeys, harbor also two distinct gamma-2 herpesviruses, thus strongly suggesting that a second gamma-2 herpesvirus, belonging to the RV2 genogroup, may exist in humans.

scholarly journals Ultraviolet Beak Spots in King and Emperor Penguins

The Condor ◽  
2005 ◽  
Vol 107 (1) ◽  
pp. 144-150 ◽  
Author(s):  
Pierre Jouventin ◽  
Paul M. Nolan ◽  
Jonas Örnborg ◽  
F. Stephen Dobson
Keyword(s):  
Sexual Maturity ◽  
Aptenodytes Patagonicus ◽  
Lower Beak ◽  
Emperor Penguins ◽  
La Mancha ◽  
Uv Reflectance ◽  
Free Ranging ◽  
Orange Color

Abstract In seabirds, colors of feathers and external tissues have only recently been studied, and ultraviolet (UV) color has not yet been detected. Using live individuals as well as museum skins, we found UV peaks of reflectance in two large Aptenodytes species, King (A. patagonicus) and Emperor (A. forsteri) Penguins. UV reflectance did not occur on the feathers, claws, or skin of these species, nor did we find UV reflectance in five other genera of penguins (11 species). UV peaks overlapped with spots of color on the lower beak that appeared orange for human observers, and beak spots differed slightly in location between the two species. Adults of both sexes possessed these UV markings, but they were lacking in juveniles, as was the orange color of the beak spot, and auricular patches used for selecting mates. Finally, measurements of free-ranging King Penguins showed that recently paired birds had higher UV reflectance than courting ones, suggesting possible roles of UV beak spots in pairing and as an indicator of sexual maturity. Manchas Ultravioleta en el Pico de los Pingüinos Aptenodytes patagonicus y A. forsteri Resumen. En las aves marinas, los colores de las plumas y los tejidos externos sólo han sido estudiados recientemente, y el color ultravioleta (UV) todavía no se ha detectado. En individuos vivos así como en pieles de museo, nosotros encontramos picos de reflectancia UV en dos especies de pingüinos, Aptenodytes patagonicus y A. forsteri. El color UV no se encontró en las plumas, las garras o la piel de estas especies, ni encontramos color UV en otros cinco géneros de pingüinos (11 especies). Los puntos UV se encontraban superpuestos con manchas de color ubicadas en la parte baja del pico que parecían anaranjadas para los observadores humanos. Las manchas del pico difirieron levemente en forma y localización entre las dos especies. Los adultos de ambos sexos presentaron las manchas UV, pero éstas no estaban presentes en los juveniles, al igual que el color anaranjado de la mancha del pico y los parches auriculares empleados en la selección de parejas. Medidas tomadas en individuos libres de la especie A. patagonicus demostraron que los que se habían apareado recientemente tenían presentaban reflectancias de UV mayores que las de aquellos que aún estaban cortejando, lo que sugiere un posible papel de las manchas UV del pico en el apareamiento y como indicadoras de la madurez sexual.

scholarly journals Sexual maturation in free-ranging Chilabothrus angulifer (Serpentes: Boidae)

2016 ◽  
Vol 15 (2) ◽  
pp. 163
Author(s):  
Tomás M. Rodríguez-Cabrera ◽  
Javier Torres López ◽  
Ruben Marrero ◽  
Ernesto Morell Savall ◽  
Ana Sanz Ochotorena
Keyword(s):  
Growth Rate ◽  
Natural History ◽  
Reproductive Biology ◽  
Sexual Maturation ◽  
West Indies ◽  
Sexual Maturity ◽  
Limited Information ◽  
The West ◽  
In Captivity ◽  
Free Ranging

The Cuban Boa (C. angulifer) is the only boid snake in Cuba. It is the largest member of the genus, as well as the largest snake in the West Indies (> 400 cm in snout-vent length); as such, it is an iconic species of the Cuban herpetofauna. Although the snake’s natural history is poorly known, several studies describe aspects of its reproductive biology in captivity. Herein we document the sizes and ages at which both sexes reach sexual maturity in nature, and show that the Cuban Boa reaches adulthood at a much smaller size than previously reported for captive snakes. Based on the limited information on the growth rate of C. angulifer in nature, males must reach breeding size after 3 years and females after 5 years

Hematology of a Semi-Free-Ranging Colony of Mandrills (Mandrillus sphinx)

2006 ◽  
Vol 27 (6) ◽  
pp. 1709-1729 ◽  
Author(s):  
Joanna M. Setchell ◽  
Paul Tshipamba ◽  
Olivier Bourry ◽  
Pierre Rouquet ◽  
E. Jean Wickings ◽  
...  
Keyword(s):  
Mandrillus Sphinx ◽  
Free Ranging

Environmental and individual determinants of parasite richness across seasons in a free-ranging population of Mandrills (Mandrillus sphinx)

2015 ◽  
Vol 159 (3) ◽  
pp. 442-456 ◽  
Author(s):  
Clémence Poirotte ◽  
Didier Basset ◽  
Eric Willaume ◽  
Fred Makaba ◽  
Peter M. Kappeler ◽  
...  
Keyword(s):  
Mandrillus Sphinx ◽  
Parasite Richness ◽  
Individual Determinants ◽  
Free Ranging

scholarly journals Social Structure of a Semi-Free Ranging Group of Mandrills (Mandrillus sphinx): A Social Network Analysis

PLoS ONE ◽  
2013 ◽  
Vol 8 (12) ◽  
pp. e83015 ◽  
Author(s):  
Céline Bret ◽  
Cédric Sueur ◽  
Barthélémy Ngoubangoye ◽  
Delphine Verrier ◽  
Jean-Louis Deneubourg ◽  
...  
Keyword(s):  
Social Network ◽  
Social Network Analysis ◽  
Network Analysis ◽  
Social Structure ◽  
Mandrillus Sphinx ◽  
Free Ranging

Natural infection of free-ranging mandrills (Mandrillus sphinx) by enteroviruses and astroviruses in southern Gabon

2021 ◽  
Vol 150 ◽  
pp. 104659
Author(s):  
Illich M. Mombo ◽  
Larson Boundenga ◽  
Eloise Suquet ◽  
Barthélémy Ngoubangoye ◽  
Gaël D. Maganga ◽  
...  
Keyword(s):  
Natural Infection ◽  
Mandrillus Sphinx ◽  
Free Ranging

scholarly journals Rhesus monkeys show human-like changes in gaze following across the lifespan

2016 ◽  
Vol 283 (1830) ◽  
pp. 20160376 ◽  
Author(s):  
Alexandra G. Rosati ◽  
Alyssa M. Arre ◽  
Michael L. Platt ◽  
Laurie R. Santos
Keyword(s):  
Rhesus Monkeys ◽  
Sexual Maturity ◽  
Rhesus Macaques ◽  
Gaze Following ◽  
Cognitive Mechanisms ◽  
Juvenile Period ◽  
Free Ranging ◽  
Human Social Behaviour ◽  
Human Primate ◽  
Human Specific

Gaze following, or co-orienting with others, is a foundational skill for human social behaviour. The emergence of this capacity scaffolds critical human-specific abilities such as theory of mind and language. Non-human primates also follow others' gaze, but less is known about how the cognitive mechanisms supporting this behaviour develop over the lifespan. Here we experimentally tested gaze following in 481 semi-free-ranging rhesus macaques ( Macaca mulatta ) ranging from infancy to old age. We found that monkeys began to follow gaze in infancy and this response peaked in the juvenile period—suggesting that younger monkeys were especially attuned to gaze information, like humans. After sexual maturity, monkeys exhibited human-like sex differences in gaze following, with adult females showing more gaze following than males. Finally, older monkeys showed reduced propensity to follow gaze, just as older humans do. In a second study ( n = 80), we confirmed that macaques exhibit similar baseline rates of looking upwards in a control condition, regardless of age. Our findings indicate that—despite important differences in human and non-human primate life-history characteristics and typical social experiences—monkeys undergo robust ontogenetic shifts in gaze following across early development, adulthood and ageing that are strikingly similar to those of humans.

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