Margaret A. H. Bryer, Carla van Hasselt, Sophie E. Kurilla, Sky B. Beveridge, Hendri C. Coetzee, Kris H. Sabbi
{"title":"Fungal Diversity and Potential Health Benefits of Mycophagy in Chacma Baboons (Papio ursinus)","authors":"Margaret A. H. Bryer, Carla van Hasselt, Sophie E. Kurilla, Sky B. Beveridge, Hendri C. Coetzee, Kris H. Sabbi","doi":"10.1002/ajp.70146","DOIUrl":"10.1002/ajp.70146","url":null,"abstract":"<p>Humans have consumed mushrooms for food and medicine for thousands of years, yet mycophagy remains understudied among our closest relatives, the nonhuman primates. Some species of primates feature fungi prominently in their diets, in terms of food budget or fungal diversity. Most primate species, however, are observed feeding on a general category of mushrooms for a minority of time feeding and the level of detail in reporting varies widely. In this report, we address this gap, describing fungi eaten by free-ranging baboons (<i>Papio ursinus)</i> in Nature's Valley, South Africa. During routine behavioral observations between August 2023 and July 2025, baboons of multiple age/sex classes in Nature's Valley, South Africa, were recorded eating 13 different fungi. We identified 10 of these 13 fungi to the species level using their physical characteristics. We then assessed overlap with other reported fungal species eaten by primates as well as potential health and ecosystem implications of consumption of these fungi based on human and other mammalian mycophagy literature. Our findings suggest fungal consumption may be underestimated in some cases, but, more importantly, even when fungi are a small portion of the diet or consumed rarely, they may still play an important role that warrants deeper investigation.</p>","PeriodicalId":7662,"journal":{"name":"American Journal of Primatology","volume":"88 4","pages":""},"PeriodicalIF":1.8,"publicationDate":"2026-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13071124/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147669787","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Dongxin Yang, Chuanpeng Bao, Yingna Xia, Yue Ling, Fan Zhang, Ruiqi Ji, Jie Zhong, Tong Zhang, Hongwei Tian, Xiaojuan Xu, Binghua Sun
{"title":"Insights Into Variations in the Gut Virome of Tibetan Macaques (Macaca thibetana) Across Wild, Captive, and Semi-Provisioned Environments","authors":"Dongxin Yang, Chuanpeng Bao, Yingna Xia, Yue Ling, Fan Zhang, Ruiqi Ji, Jie Zhong, Tong Zhang, Hongwei Tian, Xiaojuan Xu, Binghua Sun","doi":"10.1002/ajp.70148","DOIUrl":"10.1002/ajp.70148","url":null,"abstract":"<div>\u0000 \u0000 <p>Viruses are integral components of the mammalian gut ecosystem, playing crucial roles in regulating the gut microbiome and maintaining host health. However, the impact of human activity on the gut virome of mammals remains poorly understood. This study investigated the gut viromes of Tibetan macaques (<i>Macaca thibetana</i>), a primate species endemic to China, under three distinct human-influenced environments (wild, semi-provisioned, and captive) using metagenomic sequencing. Our results revealed that semi-provisioned macaques supported the highest viral diversity, while captive and wild groups exhibited lower diversity, with distinct functional shifts among groups. Furthermore, the co-variation and highly coupled KEGG functional profiles between viral and bacterial communities suggest they function as an integrated synergistic network, where changes in one directly impact the metabolic output of the other. Co-occurrence network analysis further demonstrated that the virus-bacterium interaction network in the captive group was the most fragile, with a structure indicative of a high risk of micro-ecosystem imbalance. Microbial system imbalance is characterized by alterations in both community composition and function, resulting in diminished resilience and stability, which may ultimately compromise host intestinal health. Our results demonstrate that captivity and provisioning drive divergence in the Tibetan macaque gut virome. The fragile, skewed networks in captive individuals highlight a potential cost to microbial health, which may underlie broader health and adaptation risks such as heightened pathogen susceptibility and diminished capacity to cope with environmental perturbations. Thus, monitoring the virome offers a novel early-warning system, informing strategies to enhance welfare and conservation outcomes.</p></div>","PeriodicalId":7662,"journal":{"name":"American Journal of Primatology","volume":"88 4","pages":""},"PeriodicalIF":1.8,"publicationDate":"2026-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147643619","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Paula Escriche Chova, Debottam Bhattacharjee, Tim-Joshua Andres, Elisabeth H. M. Sterck, Anne Marijke Schel, Jorg J. M. Massen
{"title":"Motherhood and Sex Predict Emotional Reactivity During a Predator Confrontation in Two Macaque Species","authors":"Paula Escriche Chova, Debottam Bhattacharjee, Tim-Joshua Andres, Elisabeth H. M. Sterck, Anne Marijke Schel, Jorg J. M. Massen","doi":"10.1002/ajp.70143","DOIUrl":"10.1002/ajp.70143","url":null,"abstract":"<p>Understanding how animal emotions influence behavior and physiology is essential to comprehend animals’ emotional responses and how these may differ between individuals. However, accurately assessing animal emotions is challenging due to their multifaceted nature and the need for multimodal approaches. This study investigates the effect of maternal status (mothers vs. females without dependent offspring), sex, and species on the emotional reactivity of two macaque species (long-tailed and rhesus macaques) confronted with a threatening situation. Using a non-invasive and multidimensional approach, we collected data on their behavior, facial temperature changes, and vocal reactivity during a predator exposure. We show that mothers produced a stronger initial physiological response, that is, a decrease in the nose tip temperature, whereas males and non-mothers showed a stronger behavioral response, with an increase in stress-related behaviors 10 min after exposure. Vocal behavior, however, did not differ across groups or species. Long-tailed macaques had a stronger initial physiological response and showed more stress-related behaviors at the beginning of the experiment than rhesus, while rhesus macaques showed more stress-related behaviors at the end. While mothers showed a stronger internal physiological response, non-mothers and males may be in a position to afford stronger behavioral reactions. Long-tailed macaques seem to respond faster to threats than rhesus macaques, which is in line with them being more vulnerable to predators. In conclusion, our study shows that emotional responses to a potential danger differ across maternal status, sex, and species, and concurrently highlights the importance of a multidimensional approach when studying such differences.</p>","PeriodicalId":7662,"journal":{"name":"American Journal of Primatology","volume":"88 4","pages":""},"PeriodicalIF":1.8,"publicationDate":"2026-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ajp.70143","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147626851","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Correction to “Characterization of the Sweet Taste Receptor T1R2/T1R3 From Chimpanzee and Comparison With the Human T1R2/T1R3”","authors":"","doi":"10.1002/ajp.70150","DOIUrl":"10.1002/ajp.70150","url":null,"abstract":"<p>Zheng, H., X. Wang, C. Dou, Y. Zheng, Y. Zhang, and B. Liu. 2026. Characterization of the Sweet Taste Receptor T1R2/T1R3 From Chimpanzee and Comparison With the Human T1R2/T1R3. <i>American Journal of Primatology</i> 88, no. 3: e70140.</p><p>In the original published version of the article, Bo Liu is missing from the Author Contributions section. The author contributions should have read:</p><p>Author Contributions</p><p><b>Hong Zheng:</b> writing – original draft, conceptualization, visualization. <b>Xupeng Wang:</b> methodology, validation. <b>Cunli Dou:</b> data curation, software. <b>Yue Zheng:</b> investigation, project administration. <b>Yuyu Zhang:</b> writing – review and editing, formal analysis. <b>Bo Liu:</b> funding acquisition, supervision, resources.</p>","PeriodicalId":7662,"journal":{"name":"American Journal of Primatology","volume":"88 4","pages":""},"PeriodicalIF":1.8,"publicationDate":"2026-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ajp.70150","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147615684","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Muhammad Rehan, Muhammad Kabir, Eve Bohnett, Jinhu Bian, Faizan Ahmad, Touseef Ahmad Khan, Ainong Li
{"title":"From Hotspots to Action: Spatial Risk and Habitat Priorities for Human–Macaque Coexistence in the Hindu Raj Mountains, Pakistan","authors":"Muhammad Rehan, Muhammad Kabir, Eve Bohnett, Jinhu Bian, Faizan Ahmad, Touseef Ahmad Khan, Ainong Li","doi":"10.1002/ajp.70145","DOIUrl":"10.1002/ajp.70145","url":null,"abstract":"<div>\u0000 \u0000 <p>Anthropogenic pressures and climate change increasingly threaten biodiversity hotspots, especially ecologically fragile and understudied mountainous regions. Understanding the spatial ecology of resident wildlife is essential for addressing the conservation challenges posed in such environments, particularly for lesser-studied primate species in Pakistan. The study area lies within rugged terrain, which is highly vulnerable to climate change. Here, we present the first integrated assessment of habitat suitability and the identification of conflict risk hotspots for the rhesus macaque (<i>Macaca mulatta</i>) in the Hindu Raj Mountains of Swat, Pakistan. Species distribution modeling marked the key hotspot areas of suitable habitat and conflict-prone sites. The models achieved high predictive performance (habitat suitability model AUC = 0.96, TSS = 0.80; conflict model AUC = 0.93, TSS = 0.81). Annual mean temperature, temperature range, precipitation of the driest month, and forest cover were the strongest drivers of habitat suitability. Suitable habitat covered 1571 km² (29.3% of the study area), concentrated in mid-elevation forest-agriculture mosaics. Areas highly suitable for human–macaque conflict were primarily concentrated where suitable habitats overlapped with dense human presence, particularly in Matta (29.3% conflict-prone), Khwazakhela (24.2%), and Charbagh (18.5%). The global human modification index and proximity to human settlements were strong predictors of conflict risk. Our findings provide a spatially explicit framework for prioritizing conservation and management interventions. We highlight the need for eco-friendly, non-lethal preventive measures to promote sustainable human–macaque coexistence in the Hindu Raj Mountains.</p></div>","PeriodicalId":7662,"journal":{"name":"American Journal of Primatology","volume":"88 4","pages":""},"PeriodicalIF":1.8,"publicationDate":"2026-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147607751","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ken Sayers, Jaclyn Allen, Rita U Bellanca, Tara Brown, Kristine Coleman, Marissa Janavaris, Jessica H Khuu, Grace H Lee, Jaine E Perlman, Ori Pomerantz, Michele Rosga
{"title":"Complex Substrates and Bedding for Environmental Enhancement and Research: Or, the Nature of Primates.","authors":"Ken Sayers, Jaclyn Allen, Rita U Bellanca, Tara Brown, Kristine Coleman, Marissa Janavaris, Jessica H Khuu, Grace H Lee, Jaine E Perlman, Ori Pomerantz, Michele Rosga","doi":"10.1002/ajp.70149","DOIUrl":"10.1002/ajp.70149","url":null,"abstract":"<p><p>Complex substrates, including bedding, have generally been known to encourage nonhuman primate species-typical behaviors and have myriad uses in research, yet are still frequently resisted, especially in laboratory environments. Data show or suggest that complex substrates have the potential to address many primate biological proclivities-ecological and social-concurrently, and to a greater degree than is commonly appreciated. A literature review, along with an informal survey and focus group involving individuals at the National Primate Research Centers and affiliated institutions, provides logistical information relevant to the selection of substrates, their respective advantages and disadvantages, and strategies for successfully arguing for, implementing, or expanding their use. In addition, complex substrates have been utilized successfully in many lines of basic research, have the potential to contribute to others, and will likely improve the quality of primates as a research model. It is hoped that this review will encourage the increased utilization of bedding and other complex substrates in primate behavioral management and science.</p>","PeriodicalId":7662,"journal":{"name":"American Journal of Primatology","volume":"88 4","pages":"e70149"},"PeriodicalIF":1.7,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13151943/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147669789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Landscape Attributes Shape Population Density Patterns of Black and Gold Howler Monkeys (Alouatta caraya) Across Their Southern Range.","authors":"Rodrigo Bay-Jouliá, Débora R Gilles, Nicolás Gorostiaga, Florencia Quijano, Gimena Illia, Marcela Orozco, Martín Kowalewski","doi":"10.1002/ajp.70155","DOIUrl":"10.1002/ajp.70155","url":null,"abstract":"<p><p>Understanding the drivers of spatial variation in primate population attributes is essential, especially in human-modified landscapes. However, most research has focused on assessing the effects of forest patch size on presence-absence data rather than how landscape attributes can shape population density. Numerous studies have presented data on Alouatta caraya (A. caraya) populations across their distribution, revealing variation in population densities among sites. Although there are hypotheses to explain why population density varies, the ecological factors influencing such variation remain poorly understood. We aim to explore the effects of landscape attributes, climatic and ecological variables in A. caraya population density throughout its southern range. We gathered a database of population data of A. caraya, and tested the effects of landscape attributes, land-use, temperature, precipitation, seasonality, elevation, and presence of sympatric species on the population density using generalized linear models. Total forest cover and landscape configuration were the most influential predictors of A. caraya density, while the presence of other species had a low but non-significant effect, and land-use and climatic variables had a weaker or no effect. Overall, howler density increases in landscapes when there is a larger number of patches of forest mixed with a heterogeneous matrix. These results support the assumptions that ecologically flexible species may positively respond to forest fragmentation, highlighting the conservation value that small patches can have for some species. As A. caraya is a forest-dependent species, conservation efforts should prioritize maintaining and enhancing patch connectivity to ensure the long-term persistence of their populations.</p>","PeriodicalId":7662,"journal":{"name":"American Journal of Primatology","volume":"88 4","pages":"e70155"},"PeriodicalIF":1.7,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147721296","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}