.... Antipredator behaviour Camera traps Species co-occurrence Predation Gorilla Chimpanzee Leopard Though theory recognizes predation pressure as a crucial determinant of sociality for many mammals [e.g. van Schaik et al., 1983], the importance of predation to primate evolution has been subject...

... in numerous non-human primate species. However, no study has tested the effects that a variety of tasks may have in inducing differences in hand preference. Here, we aim to test if 3 adult gorillas exhibited a greater hand preference bias performing 4 tasks of varying complexity: grasping small versus large...

...Sarah C. Sawyer; Martha M. Robbins Innovation, the invention of new behavior, has been observed in wild primates only infrequently. The processing of thistle (Cardus nyassanus) has previously been described as being one of the most complex food processing techniques used by mountain gorillas...

... of the condylar vein over the temporal sinus appears to occur progressively during great ape evolution. Emissary veins Condylar canal Retroarticular foramen Temporal sinus Sigmoid sinus Pongo Gorilla Pan Reviewed Article Folia Priniatol 1995:65:144-153 © 1996 S. Karger AG, Basel 0015-5713/95...

...Michael P. Hoff; Ronald D. Nadler; Terry L. Maple An adult male gorilla was removed from the social group in which it had resided for 27 months. There was an immediate increase in aggressive behaviors among the remaining adult females, as well as an intensification of mother-infant social behaviors...

...R.D. Nadler; L.C. Miller The frequency of sexual interactions between oppositely-sexed pairs of gorillas tested in the laboratory was directly related to the frequency of male aggression directed toward the female. The data suggest that male aggression stimulated female presenting and copulation...

...Jeffrey H. Schwartz A specimen of juvenile gorilla was found that had the premaxillary-maxillary suture coursing between the lateral deciduous incisor and deciduous canine on one side of the jaw, but between the central and lateral deciduous incisors on the other; in the latter, the suture also...

...A.H. Harcourt; S.A. Harcourt Invertebrates occur in large numbers on the food plants of the gorillas of the Virunga Volcanoes of East Central Africa. Consequently, the animals inadvertently eat several thousand invertebrates per day. Most are minute, however, and total daily ingestion...

...Barbara L. Tilford; Ronald D. Nadler A captive group of lowland gorillas, consisting of an adult silverback male and three females with infants was studied for evidence of male parental behavior. The adult male socially approached, attempted to contact, touched and held/carried the infants, but did...

...Colin P. Groves; Kenhelm W. Stott, jr. Previous classifications of gorillas from Mt. Kahuzi, Mt. Tshiaberimu and the Kayonza Forest, placing them in Gorilla gorilla graueri or G.g. beringei , somewhat oversimplify a complex situation. Both Kahuzi and Tshiaberimu gorillas are close to graueri...

... dominance structure for female gorillas. Particular rankings appear to be sensitive to the total social situation and change to readapt to modifications induced in the social environment. These findings are hypothesized to reflect the overall adaptation of this species in terms of spatial deployment, other...

...M. Schultz; D. Starck The problem of ‘Gundu’ in primates is discussed. Cases of so-called ‘Gundu’ in the literature, two cases in Gorilla and one in Lagothrix, are dealt with. Histological and X-ray techniques are used. One case (Lagothrix) represents the so-called simian bone disease, which...

...D.M. Rumbaugh; G.T. Steinmetz The acquisition and reversal performances of 5 juvenile gorillas in a discrimination-reversal task were found to correlate highly and positively. Number of acquisition trials (7 and 13) influenced the frequency with which the various pre-reversal mastery levels were...

...W.C.O. Hill; J. Sabater Pi For the first time is reported the congenital absence bilaterally of the terminal joint and nail from the hallux in a gorilla, hitherto known only in the orang-utan, where the condition is not unusual. 9 9 2008 Folia primat. 14: 252-255 (1971) Anomaly...

...J. Planas; M. Grau In 72 chimpanzees and 12 gorillas various serum chemical values have been determined. The results obtained have been compared with the human species. The great similarity in many values and in the variations caused by age can be appreciated. 9 9 2008 © 1971 S. Karger...

...J.I. Antonius; Simone A. Ferrier; L.A. Dillingham A 16½-year-old male gorilla died unexpectedly and suddenly. He had thrombophlebitis, estimated at one month duration, involving his left leg, pelvic veins and inferior vena cava. Death was due to fracture of the larynx with hemorrhage into the neck...

...O.J. Lewis The anatomy of the wrist joint is described in specimens of Ateles geoffroyi, Ateles sp., Lagothrix lagotricha, Pongo pygmaeus and Gorilla gorilla gorilla. It is demonstrated that the semibrachiating monkeys retain a primitive quadrupedal type of articulation with the ulnar styloid...

...H.O. Hofer This paper describes the external morphology of the oro-nasal region of Gorilla, in comparison with Pan. The pattern of furrows involved in certain movements of this region is described. There is a basic pattern of furrows common to man and pongids. 9 9 2008 © 1972 S. Karger...

...H.O. Hofer A brief gross anatomical description of the corpus adiposum buccae in an adult male Pan troglodytes is given. It is very similar to the correspondent body of adipose tissue in man. The occurrence of Bichat’s body in infant and newborn gorillas and in Papio hamadryas is reported. 9 9...

... disturbances. We carried out two annual censuses of western lowland gorilla (G. g. gorilla) and chimpanzee populations (Pan t. troglodytes) in an active logging concession in Southeast Cameroon. The results suggest that gorillas may adapt their range use to avoid most recently logged compartments, while...