Results 31 to 40 of about 84,650 (262)

Atypical experiences of captive chimpanzees (Pan troglodytes) are associated with higher hair cortisol concentrations as adults [PDF]

open access: yesRoyal Society Open Science, 2017
Experiences during early development are influential on the lives of human and non-human primates into adulthood. The population of captive chimpanzees in the USA can provide insight into this relationship, as collectively they have experienced a wide ...
S. L. Jacobson   +3 more
doaj   +1 more source

A Model-Based Analysis of GC-Biased Gene Conversion in the Human and Chimpanzee Genomes [PDF]

open access: yes, 2013
GC-biased gene conversion (gBGC) is a recombination-associated process that favors the fixation of G/C alleles over A/T alleles. In mammals, gBGC is hypothesized to contribute to variation in GC content, rapidly evolving sequences, and the fixation of ...
A Auton   +55 more
core   +6 more sources

Bystanders intervene to impede grooming in Western chimpanzees and sooty mangabeys [PDF]

open access: yesRoyal Society Open Science, 2017
Grooming interactions benefit groomers, but may have negative consequences for bystanders. Grooming limits bystanders' grooming access and ensuing alliances could threaten the bystander's hierarchy rank or their previous investment in the groomers.
Alexander Mielke   +5 more
doaj   +1 more source

Challenge pools of hepatitis C virus genotypes 1-6 prototype strains: replication fitness and pathogenicity in chimpanzees and human liver-chimeric mouse models [PDF]

open access: yes, 2010
Chimpanzees represent the only animal model for studies of the natural history of hepatitis C virus (HCV). To generate virus stocks of important HCV variants, we infected chimpanzees with HCV strains of genotypes 1-6 and determined the infectivity titer ...
Bukh, Jens   +11 more
core   +1 more source

Chimpanzee Adenovirus Antibodies in Humans, Sub-Saharan Africa

open access: yesEmerging Infectious Diseases, 2006
Human sera from the United States, Thailand, and sub-Saharan Africa and chimpanzee sera were tested for neutralizing antibodies to 3 chimpanzee adenoviruses.
Zhiquan Xiang   +7 more
doaj   +1 more source

Play-solicitation gestures in chimpanzees in the wild: flexible adjustment to social circumstances and individual matrices [PDF]

open access: yesRoyal Society Open Science, 2016
Social play is a frequent behaviour in great apes and involves sophisticated forms of communicative exchange. While it is well established that great apes test and practise the majority of their gestural signals during play interactions, the influence of
Marlen Fröhlich   +2 more
doaj   +1 more source

Producing non-steady-state gaits (starting, stopping, and turning) in a biologically realistic quadrupedal simulation

open access: yesFrontiers in Ecology and Evolution, 2022
Multibody dynamic analysis (MDA) has become part of the standard toolkit used to reconstruct the biomechanics of extinct animals. However, its use is currently almost exclusively limited to steady state activities such as walking and running at constant ...
William Irvin Sellers   +4 more
doaj   +1 more source

The Rise and Fall of the Third Chimpanzee: How Our Animal Heritage Affects the Way We Live [PDF]

open access: yesپژوهش‌نامۀ انتقادی متون و برنامه‌های علوم انسانی, 2020
The book of Rise and Fall of the Third Chimpanzee: How Our Animal Heritage Affects the Way We Live, written by Jared Diamond is one of the best works in linking the evolutionary biology and cultural complexity of human societies.
Hamed Vahdati Nasab
doaj   +1 more source

The KIR repertoire of a West African chimpanzee population is characterized by limited gene, allele, and haplotype variation

open access: yesFrontiers in Immunology, 2023
IntroductionThe killer cell immunoglobulin-like receptors (KIR) play a pivotal role in modulating the NK cell responses, for instance, through interaction with major histocompatibility complex (MHC) class I molecules.
Natasja G. de Groot   +5 more
doaj   +1 more source

Head-mounted eye tracking of a chimpanzee under naturalistic conditions.

open access: yesPLoS ONE, 2013
This study offers a new method for examining the bodily, manual, and eye movements of a chimpanzee at the micro-level. A female chimpanzee wore a lightweight head-mounted eye tracker (60 Hz) on her head while engaging in daily interactions with the human
Fumihiro Kano, Masaki Tomonaga
doaj   +1 more source

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