Anne‐Céline Granjon
A5084869817- Primate Behavior and Ecology
- Wildlife Ecology and Conservation
- Animal Behavior and Reproduction
- Species Distribution and Climate Change
- Genetic diversity and population structure
- Syphilis Diagnosis and Treatment
- Reproductive tract infections research
- Bat Biology and Ecology Studies
- Identification and Quantification in Food
- Genomics and Phylogenetic Studies
- Zoonotic diseases and public health
- Bacillus and Francisella bacterial research
- Global Maritime and Colonial Histories
- Parasite Biology and Host Interactions
- Genetic and phenotypic traits in livestock
- Rabies epidemiology and control
- Virology and Viral Diseases
- Evolutionary Psychology and Human Behavior
- Archaeology and Rock Art Studies
- Yersinia bacterium, plague, ectoparasites research
- Animal Vocal Communication and Behavior
- Archaeology and ancient environmental studies
- Environmental DNA in Biodiversity Studies
- Human-Animal Interaction Studies
- Amphibian and Reptile Biology
Max Planck Institute for Evolutionary Anthropology
2016-2025
German Centre for Integrative Biodiversity Research
2024-2025
Leipzig University
2025
Max Planck Society
2020
More than just numbers We often frame negative human impacts on animal species in terms of individuals reduced or regions from which are absent. However, activities likely affecting more complex ways these figures can capture. Kühl et al. studied behavioral and cultural diversity our closest relative, the chimpanzee. They found that human-mediated disturbance is reducing traits. Human influence thus goes well beyond simple loss populations species, leading to change even where persist....
How populations adapt to their environment is a fundamental question in biology. Yet, we know surprisingly little about this process, especially for endangered species, such as nonhuman great apes. Chimpanzees, our closest living relatives, are particularly notable because they inhabit diverse habitats, from rainforest woodland-savannah. Whether genetic adaptation facilitates habitat diversity remains unknown, despite it having wide implications evolutionary biology and conservation. By...
Abstract Monitoring population size and growth over time is vital for the conservation of endangered species. Mountain gorillas Gorilla beringei remain in two small populations that span borders Democratic Republic Congo, Rwanda Uganda. Each contains subpopulations receive differing levels protection: monitored groups are visited daily by park staff researchers can be counted sight, whereas number rate unmonitored must estimated indirectly. Here, we re‐analyze published data from a survey...
Knowledge on the population history of endangered species is critical for conservation, but whole-genome data chimpanzees (Pan troglodytes) geographically sparse. Here, we produced first non-invasive geolocalized catalog genomic diversity by capturing chromosome 21 from 828 samples collected at 48 sampling sites across Africa. The four recognized subspecies show clear genetic differentiation correlating with known barriers, while previously undescribed exchange suggests that these have been...
ABSTRACT Ongoing ecosystem change and biodiversity decline across the Afrotropics call for tools to monitor state of or elements extensive spatial temporal scales. We assessed relationships in co‐occurrence patterns between great apes other medium large‐bodied mammals evaluate whether ape abundance serves as a proxy mammal diversity broad used camera trap footage recorded at 22 research sites, each known harbor population chimpanzees, some additionally gorillas, 12 sub‐Saharan African...
We investigated occurrences and patterns of terrestrial nocturnal activity in wild chimpanzees (Pan troglodytes) modelled the influence various ecological predictors on activity.Data were extracted from camera-trap footage surveys 22 chimpanzee study sites participating Pan African Programme: The Cultured Chimpanzee. described videos demonstrating activity, we tested effects percentage forest, abundance predators (lions, leopards hyenas), large mammals (buffalos elephants), average daily...
Large-scale genomic studies of wild animal populations are often limited by access to high-quality DNA. Although noninvasive samples, such as faeces, can be readily collected, DNA from the sample producers is usually present in low quantities, fragmented, and contaminated microorganism dietary DNAs. Hybridization capture help overcome these impediments increasing proportion subject prior high-throughput sequencing. Here we evaluate a key design variable for hybridization capture, number...
Abstract As camera trapping grows in popularity and application, some analytical limitations persist including processing time accuracy of data annotation. Typically images are recorded by traps although videos becoming increasingly collected even though they require much more for To overcome with image annotation, trap studies linked to community science (CS) platforms. Here, we extend previous work on CS annotations from a challenging environment; dense tropical forest low visibility high...
Abstract Noninvasive samples as a source of DNA are gaining interest in genomic studies endangered species. However, their complex nature and low endogenous content hamper the recovery good quality data. Target capture has become productive method to enrich fraction noninvasive samples, such faeces, but its sensitivity not yet been extensively studied. Coping with faecal an below 1% is common problem when prior selection from large collection possible. classified unfavourable for target...
Abstract How populations adapt to their environment is a fundamental question in biology. Yet we know surprisingly little about this process, especially for endangered species such as non-human great apes. Chimpanzees, our closest living relatives, are particularly interesting because they inhabit diverse habitats, from rainforest woodland-savannah. Whether genetic adaptation facilitates habitat diversity remains unknown, despite having wide implications evolutionary biology and...
Strontium isotope (87Sr/86Sr) analysis with reference to strontium landscapes (Sr isoscapes) allows reconstructing mobility and migration in archaeology, ecology, forensics. However, despite the vast potential of research involving 87Sr/86Sr particularly Africa, Sr isoscapes remain unavailable for largest parts continent. Here, we measure ratios 778 environmental samples from 24 African countries combine this data published model a bioavailable isoscape sub-Saharan Africa using random forest...
ABSTRACT Genetic capture‐recapture (CR) estimates of population size have potential for aiding the conservation and management rare or elusive animals. To date, few studies explored performance genetic CR by implementing them in a known size. We evaluated accuracy precision genotyping fecal samples collected opportunistically over territory well‐studied group approximately 190 previously identified genotyped eastern chimpanzees ( Pan troglodytes schweinfurthii ) Kibale National Park, Uganda....
Abstract Paleoclimate reconstructions have enhanced our understanding of how past climates shaped present‐day biodiversity. We hypothesize that the geographic extent Pleistocene forest refugia and suitable habitat fluctuated significantly in time during late Quaternary for chimpanzees ( Pan troglodytes ). Using bioclimatic variables representing monthly temperature precipitation estimates, human population density data, an extensive database georeferenced presence points, we built a model...
The manual processing and analysis of videos from camera traps is time-consuming includes several steps, ranging the filtering falsely triggered footage to identifying re-identifying individuals. In this study, we developed a pipeline automatically analyze identify individuals without requiring interaction. This applies animal species with uniquely identifiable fur patterns solitary behavior, such as leopards (Panthera pardus). We assumed that same individual was seen throughout one video...
Many non-human primate species in sub-Saharan Africa are infected with Treponema pallidum subsp. pertenue , the bacterium causing yaws humans. In humans, is often characterized by lesions of extremities and face, while T. causes venereal syphilis typically primary on genital, anal or oral mucosae. It remains unclear whether other subspecies found humans also occur primates how genomic diversity lineages distributed across hosts space. We observed orofacial genital sooty mangabeys (...
Abstract Aim Paleoclimate reconstructions have enhanced our understanding of how past climates may shaped present-day biodiversity. We hypothesize that habitat stability in historical Afrotropical refugia played a major role the suitability and persistence chimpanzees ( Pan troglodytes ) during late Quaternary. aimed to build dynamic model changing for at fine spatio-temporal scales provide new resource their ecology, behaviour evolution. Location Afrotropics. Taxon Chimpanzee ), including...
The Virunga Massif mountain gorilla population has been periodically monitored since the early 1970s, with gradually increasing effort. declined drastically in but numbers stabilized 1980s. Since then, steadily within their limited habitat fragment that is surrounded by a dense human population. We examined fecal samples collected during 2015-2016 surveys and unmonitored groups quantified strongylid tapeworm infections using egg counts per gram to determine environmental host factors shape...
Abstract The question of how behavioural diversity in humans and other animals is shaped by the combined influence demography, genetics, culture, environment receives much research attention. We take a macro-ecological approach to evaluate chimpanzee ( Pan troglodytes ) spatially structured associated with genetic (i.e. heterozygosity as proxy for effective population size) contemporary historic environmental context. integrate largest available genomic datasets apply explicit Bayesian...
Abstract Background Increasing evidence suggests many non-human primate (NHP) species in sub-Saharan Africa are infected with Treponema pallidum subsp. pertenue (TPE), the bacterium causing yaws humans. In humans, is characterized by lesions of extremities and face, while (TPA) causes venereal syphilis primary on genital, anal or oral mucosae, has not been detected NHPs. Due to a paucity genetic data, it remains unclear whether other (TP) subspecies found humans also occur NHP how genomic...
The manual processing and analysis of videos from camera traps is time-consuming includes several steps, ranging the filtering falsely triggered footage to identifying re-identifying individuals. In this study, we developed a pipeline automatically analyze identify individuals without requiring interaction. This applies animal species with uniquely identifiable fur patterns solitary behavior, such as leopards (Panthera pardus). We assumed that same individual was seen throughout one video...