Colin A Chapman
Dados Biográficos
| ID | 625007 |
|---|---|
| NOME | Colin A Chapman |
| PRENOMES | Colin A |
| SOBRENOME | Chapman |
| ASSINATURA | CHAPMAN C A |
| AFILIAÇÕES | Wildlife Conservation Society |
| ORCID | 0000-0002-8827-8140 |
| VERIFICADO | Sim |
| TOTAL DE OBRAS | 148 |
| TOTAL DE CITAÇÕES | 753 |
| TOTAL COMO AUTOR | 148 |
| TOTAL COMO EDITOR | 0 |
| PRIMEIRO ANO DE PUBLICAÇÃO | 1984 |
| ANO MAIS RECENTE DE PUBLICAÇÃO | 2026 |
| ÍNDICE H | 15 |
Heterospecific social behavior in primates
Primate interspecific interactions with both other primates and non-primate species range from predator–prey dynamics to affiliative behaviors such as grooming, play, and carrying. While many primates participate in interspecific associations or commensal relationships, to our knowledge interspecific social interactions have never been systematically synthesized. Here, we present the first comprehensive review of such interactions, compiling 427 …
Activity, Ranging, and Habitat Use Patterns of Two Groups of Boutourline’s Blue Monkeys (Cercopithecus mitis boutourlinii) in Habitats with Different Levels of Anthropogenic Modification in Hamuma Cof…
Cost-effective expansion of protected areas reduces global zoonotic risk and biodiversity loss
Fifty+ years of primate research illustrates complex drivers of abundance and increasing primate numbers
Many primate populations are threatened by human actions and a central tool used for their protection is establishing protected areas. However, even if populations in such areas are protected from hunting and deforestation, they still may be threatened by factors such as climate change and its cascading impacts on habitat quality and disease dynamics. Here we provide a long‐term and geographically wide‐spread population assessment of the five com…
Impacts of Covid-19 on Biodiversity Conservation and Community Networks at Kibale National Park, Uganda
Conservation, like all aspects of society, was severely affected by the COVID-19 pandemic. Although there have been projections and speculations about impacts on conservation plans and actions, data about the extent of these impacts are sparse. We contribute evidence from a research field site in Kibale National Park, Uganda. Our analysis shows that many of the fears concerning the negative conservation impacts of COVID-19 were borne out. Long-te…
Determinants of macaques' space use
As a central topic in Behavioral Ecology, animal space use involves dynamic responses to social and ecological factors. We collared 22 rhesus macaques ( Macaca mulatta ) from six groups on Neilingding Island, China, and collected 80,625 hourly fixes over a year. Using this high‐resolution location data set, we quantified the macaques' space use at the individual level and tested the ecological constraints model while considering various environme…
Lead exposure and its relationship with fecal cortisol levels in black howler monkeys ( Alouatta pigra )
Efficiently detecting early environmental threats to wildlife is vital for conservation. Beyond obvious dangers like habitat loss or deforestation, our study focuses on one of the most hazardous toxic metals for wildlife: lead (Pb). Pb is a widespread, cumulative, and insidious environmental pollutant that can trigger a wide range of physiological, biochemical, and behavioral disorders. In fact, Pb can cause permanent dysfunction of the major str…
Primate population dynamics in Ngogo, Kibale National Park, Uganda, over nearly five decades
Growing disparity in global conservation research capacity and its impact on biodiversity conservation
Breeding Seasonality in Female Vervet Monkeys (Chlorocebus pygerythrus) Living in an Anthropogenic Landscape
The Movement of Pathogen Carrying Flies at the Human–Wildlife Interface
Flies form high-density associations with human settlements and groups of nonhuman primates and are implicated in transmitting pathogens. We investigate the movement of nonhuman primate-associated flies across landscapes surrounding Kibale National Park, Uganda, using a mark–recapture experiment. Flies were marked in nine nonhuman primate groups at the forest edge ( $$\overline{x}$$ x ̄ = 929 flies per group), and we then attempted to recapture t…
The cost of living in larger primate groups includes higher fly densities
Flies are implicated in carrying and mechanically transmitting many primate pathogens. We investigated how fly associations vary across six monkey species ( Cercopithecus ascanius, Cercopithecus mitis , Colobus guereza , Lophocebus albigena , Papio anubis , and Piliocolobus tephrosceles ) and whether monkey group size impacts fly densities. Fly densities were generally higher inside groups than outside them, and considering data from these primat…
How individual, social, and ecological conditions influence dispersal decisions in male vervet monkeys
Dispersal between social groups reduces the risk of inbreeding and can improve individuals' reproductive opportunities. However, this movement has costs, such as increased risk of predation and starvation, loss of allies and kin support, and increased aggression associated with entering the new group. Dispersal strategies, such as the timing of movement and decisions on whether to transfer alone or in parallel with a peer, involve different costs…
Disassociation of social and sexual partner relationships in a gibbon population with stable one‐male two‐female groups
Adult males living in a one‐male multi‐female social group are expected to try to monopolize copulations with resident females to increase reproductive fitness. Gibbons have traditionally been described as living in monogamous groups, with the sole resident adult male assumed to sire all of the group's offspring. Here, we used microsatellite analyses and behavioral observations to examine rates of extra‐group paternity (EGP) over 16 years in a po…
Altmetric Scores in Conservation Science have Gender and Regional Biases
There is a growing view in conservation science that traditional ways to evaluate publications, researchers, and projects are too slow. This has led to a rise in the use of altmetrics, which are metrics based on social media data, news pieces, blogs, and more. Here we examine altmetric data linked to nearly 10,000 papers published in 23 conservation journals, exploring five issues that represent some of the challenges associated with using social…
The Critically Endangered Hainan Gibbon (Nomascus hainanus) Population Increases but not at the Maximum Possible Rate
With the ongoing global biodiversity crisis in the Anthropocene, it is critical to understand how to save endangered species to “bend the curve” of biodiversity decline. The Hainan gibbon ( Nomascus hainanus ) is a Critically Endangered species that is endemic to Hainan Island. We performed two synchronized total count surveys in Hainan Tropic Rain Forest National Park in November and December of 2020 and 2021 by locating gibbon groups from their…
Fruit availability has a complex relationship with fission–fusion dynamics in spider monkeys
Primate conservation
Twenty years ago, we published an assessment of the threats facing primates and with the passing of two decades, we re‐evaluate identified threats, consider emerging pressures, identify exciting new avenues of research, and tackle how to change the system to rapidly advance primate and primate habitat conservation. Habitat destruction and hunting have increased, the danger of looming climate change is clearer, and there are emerging threats such …
Deconstructing Protein in the Diet and Biomass of Colobine Primates
Sleeping Site and Tree Selection by Bale Monkeys (Chlorocebus djamdjamensis) at Kokosa Forest Fragment in Southern Ethiopia
Although selecting advantageous sleeping sites is crucial for nonhuman primates, the extent to which different factors contribute to their selection remains largely unknown for many species. We investigated hypotheses relating to predator avoidance, food access, and thermoregulation to explain the sleeping behavior of Bale monkeys ( Chlorocebus djamdjamensis ) occupying a degraded fragmented forest, Kokosa, in the southern Ethiopian Highlands. We…
Fermented food consumption in wild nonhuman primates and its ecological drivers
OBJECTIVES: Although fermented food use is ubiquitous in humans, the ecological and evolutionary factors contributing to its emergence are unclear. Here we investigated the ecological contexts surrounding the consumption of fruits in the late stages of fermentation by wild primates to provide insight into its adaptive function. We hypothesized that climate, socioecological traits, and habitat patch size would influence the occurrence of this beha…
Macaques in China
Depicting a taxonomic group's evolutionary trajectory as a function of changes in the geographical landscape and its historical distribution is critical for constructing informed conservation strategies. Based on fossil sites from the Pliocene to the Holocene, and historical records since 1175 AD, we established macaques’ dispersal pathways into and through China. These routes include internal pathways starting from the southeast corner of the Qi…
Fruit Selectivity in Anthropoid Primates
Male social rank and food competition in a primate multi‐level society
OBJECTIVES: Social animals often have dominance hierarchies, with high rank conferring preferential access to resources. In primates, competition among males is often assumed to occur predominantly over reproductive opportunities. However, competition for food may occur during food shortages, such as in temperate species during winter. Higher-ranked males may thus gain preferential access to high-profitability food, which would enable them to spe…
Playing it safe? Solitary vervet monkeys ( Chlorocebus pygerythrus ) choose high‐quality foods more than those in competition
An important goal in foraging ecology is to determine how biotic and abiotic variables impact the foraging decisions of wild animals and how they move throughout their multidimensional landscape. However, the interaction of food quality and feeding competition on foraging decisions is largely unknown. Here we examine the importance of food quality in a patch on the foraging decisions of wild vervet monkeys ( Chlorocebus pygerythrus ) at Lake Nabu…
Hardness of cercopithecine foods
We evaluate the hardness of foods consumed by sympatric Cercopithecus ascanius (redtail guenons) and Lophocebus albigena (grey‐cheeked mangabeys), and consider how selection might operate to influence foraging adaptations. Since L. albigena has among the thickest dental enamel in extant primates and is commonly referred to as a hard‐object consumer, we predicted that their diet would be harder than that of the guenon. Data on diet and food hardne…
Fission-Fusion Dynamics
Renewed interest in fission-fusion dynamics is due to the recognition that such dynamics may create unique challenges for social interaction and distinctive selective pressures acting on underlying communicative and cognitive abilities. New frameworks for integrating current knowledge on fission-fusion dynamics emerge from a fundamental rethinking of the term "fission-fusion" away from its current general use as a label for a particular modal typ…
Positional behavior in five sympatric old world monkeys
Observations of positional behavior and habitat use were recorded on focal individuals of five species of Old World monkeys at Kibale Forest, Uganda, through the dry season of 1990 and 1991. Cercopithecus ascanius, Cercopithecus mitis, Cercocebus albigena, Colobus badius, and Colobus guereza commonly utilize five similar types of positional behavior (i.e., quadrupedalism, leaping, climbing, sitting, and standing), but in varying frequencies and s…
Coping with Forest Fragmentation
Application of Protein-to-Fiber Ratios to Predict Colobine Abundance on Different Spatial Scales
Methods in Primate Nutritional Ecology
Variation in the Nutritional Value of Primate Foods
Constraints on Group Size in Red Colobus and Red-tailed Guenons
Scale issues in the study of primate foraging
Diet data have been used to address a number of theoretical issues. We often calculate the proportion of time spent eating different foods (e.g., fruits, leaves) to place species into dietary categories and contrast morphological or behavioral traits among categories. Yet we have little understanding of how flexible species can be in terms of the plant parts and species consumed. To address this issue, we analyzed data on the diets of red colobus…
Do food availability, parasitism, and stress have synergistic effects on red colobus populations living in forest fragments
Identifying factors that influence animal density is a fundamental goal in ecology that has taken on new importance with the need to develop informed management plans. This is particularly the case for primates as the tropical forest that supports many species is being rapidly converted. We use a system of forest fragments adjacent to Kibale National Park, Uganda, to examine if food availability and parasite infections have synergistic affects on…
Mineral Resource Availability and Consumption by Colobus in Kibale National Park, Uganda
Terrestrial Behavior of Ateles spp
Habitat, annual, and seasonal effects on positional behavior in red colobus monkeys
Positional behavior in adult red colobus monkeys ( Colobus badius ) was examined in a variety of ecological contexts. Using a focal‐animal methodology, we assessed how data collected by different observers, in different years, in different seasons, and in different forests affected estimates of positional behavior. In all, 23,000 bouts were recorded. Variation in frequency is greatest in the common behaviors, especially arboreal quadrupedalism. S…
Population Characteristics of Howlers
Densities of Two Frugivorous Primates with Respect to Forest and Fragment Tree Species Composition and Fruit Availability
Nutritional correlates of the “lean season”
Primate field studies often identify “lean seasons,” when preferred foods are scarce, and lower‐quality, abundant foods (fallback foods) are consumed. Here, we quantify the nutritional implications of these terms for two diademed sifaka groups ( Propithecus diadema ) in Madagascar, using detailed feeding observations and chemical analyses of foods. In particular, we sought to understand 1) how macronutrient and energy intakes vary seasonally, inc…
Population Declines of Colobus in Western Uganda and Conservation Value of Forest Fragments
Mixed-species primate groups in the kibale forest
Intratree Variation in Fruit Production and Implications for Primate Foraging
Temporal dynamics of nutrition, parasitism, and stress in colobus monkeys
The need to develop conservation plans calls for the ability to identify ecological factors that influence population density. Because stress is known to affect fecundity and mortality, increasing stress may provide a warning of potential population declines. We examined the effects of temporal variation in nutrition and parasitism on stress in endangered red colobus monkeys in Kibale National Park, Uganda. First, we tested the hypothesis that pa…
Female red colobus monkeys maintain their densities through flexible feeding strategies in logged forests in Kibale National Park, Uganda
Behavioral flexibility allows primates to cope with environmental variability. Quantifying primate responses to human habitat modifications allows an effective means of assessing coping mechanisms. Within Kibale National Park, Uganda, logging led to reduced primate food availability that still exists almost 50 years after the harvest. Following the predictions of the ideal free distribution theory, primate densities are expected to decrease in ar…
Resource Use in a Landscape Matrix by an Arboreal Primate
Are Primates Ecosystem Engineers
Controversy over the application of current socioecological models to folivorous primates
We explore the applicability of the current socio‐ecological model to characterize the social structure of Colobus vellerosus , a folivorous primate. The current socio‐ecological model predicts that female social relationships should respond in predictable ways to food abundance and distribution and associated competitive regimes. It appears to successfully explain variation in social structure in some primate species; however, recent research in…
Primate Seed Dispersal and Forest Restoration
Territoriality in the St Kitts vervet, Cercopithecus aethiops
Behavioural development of howling monkey twins (Alouatta palliata) in Santa Rosa National Park, Costa Rica
Social responses to the traumatic injury of a juvenile spider monkey (Ateles geoffroyi)
Selection of secondary growth areas by vervet monkeys ( Cercopithecus aethiops )
Habitat selection by a group of vervet monkeys (Cercopithecus aethiops) living on the savanna peninsula of St. Kitts was investigated by the intensive sampling of 12 transects. The vervets exhibited nonrandom use of habitats. Examination of 20 ecological variables in each of the habitat types revealed that the vervets preferentially used areas of secondary growth characterized by high density and diversity of tall food plants. It is suggested tha…
Ecological and demographic influences on the pattern of association in St. Kitts vervets
Patterns of foraging and range use by three species of neotropical primates
Patch Use and Patch Depletion By the Spider and Howling Monkeys of Santa Rosa National Park, Costa Rica
Patch depletion is an assumption that underlies many behavioural ecological models, yet it has rarely been examined. The evidence presented here suggests that the spider and howling monkeys of Santa Rosa National Park, Costa Rica use food resources that occur in patches and generally deplete the patches they use. However, some types of patches (e.g. large fruiting trees for spider monkeys, and trees used as sources of leaves for howlers) are not …
Spider monkey home ranges
The ranging patterns of two male and five female spider monkeys ( Ateles geoffroyi ) were studied with the use of radio telemetry in Santa Rosa National Park, Costa Rica. The average size of a spider monkey home range was 62.4 hectares; however, range size varied with sex, and, for females, with the presence of a dependent infant. The probability of encountering a radio‐collared spider monkey in a three‐hour search using radio telemetry (0.91) wa…
Spider monkey sleeping sites
The behavior of spider monkeys ( Ateles geoffroyi ) at sleeping sites and the characteristics of these sites were studied in Santa Rosa National Park, Costa Rica. The spider monkeys tended to congregate just prior to dusk at a number of sleeping sites which were repeatedly used (81.6%), but occasionally they slept in trees which were only used once (18.4%). All of the regularly used sleeping trees were not used concurrently, but rather, there was…
Reproductive strategies of primates
Dietary variability in primate populations
Association patterns of spider monkeys
Variability in spider monkeys' vocalizations may provide basis for individual recognition
Analysis of long‐range vocalizations given by spider monkeys revealed consistent acoustic differences among the calls of individuals. Of seven acoustic measurements, four exhibited significant variation between individuals. A discriminant analysis demonstrated that two of these variables allowed correct identification of the caller 44% of the time. Including the remainder of the variables increased the percentage correctly identified to 50%. Indi…
Group size and stability
Estimators of Fruit Abundance of Tropical Trees
Many types of biological studies require the estimation of food abundance in tropical forests, and a variety of methods have been used to estimate this parameter. Here we compare the accuracy and precision of three methods for estimating the fruit abundance (biomass and number) of tropical tree species: tree diameter, crown volume, and visual estimation. Diameter at breast height (DBH) was the most consistently accurate method and exhibited low l…
Use of male blue monkey “Pyow” calls for long‐term individual identification
This study examines whether individual adult male blue monkeys (Cercopithecus mitis stuhlmanni) can be identified through acoustic analysis of their “pyow” calls. It is possible to reliably assign the pyow call of the blue monkeys of Kibale Forest, Uganda, to the individual caller based on the acoustic properties of the vocalization. Analysis of pyows made by a recognizable male over a 10‐yr period shows that the acoustic properties of one indivi…
Nocturnal primates of kibale forest
Constraints on group size in primates and carnivores
Range use of the forest chimpanzees of Kibale
We contrast the range use patterns of male and female chimpanzees ( Pan troglodytes ) based on repeated sightings over three years of 19 individuals in the Kanyawara community of Kibale Forest Reserve, Uganda. Depending on how home range size was calculated, male chimpanzees used an area that was 1.5 to 2 times greater than that of females. There was no difference between the sexes in whether their home ranges were used in a clumped or uniform fa…
Locomotor response to predator threat in red colobus monkeys
Mangabey ( Cercocebus albigena ) population density, group size, and ranging
Mangabey groups studied in the Kibale Forest Reserve, Uganda, in 1971 were studied again in 1991 using similar data collection protocols. The results were used to assess the effect of group size on activity budgets and travel costs, and to document the effects of habitat changes on mangabey density and demography. Larger mangabey groups traveled longer distances per day than smaller groups. Time budgets were less clearly influenced by group size.…
Ecological constraints on group size
Predation on primates
Primate seed dispersal
Early studies of primates have demonstrated that many species rely heavily on fruit, and that primates constitute a large component of the frugivore biomass in tropical forests. Consequently, primates have long been thought to be important seed dispersers. It is only recently that studies have been conducted that have illustrated the complex nature of the interactions between fruit‐eating primates and their food trees. Such studies have raised qu…
Habitat, annual, and seasonal effects on positional behavior in red colobus monkeys
Positional behavior in adult red colobus monkeys ( Colobus badius ) was examined in a variety of ecological contexts. Using a focal‐animal methodology, we assessed how data collected by different observers, in different years, in different seasons, and in different forests affected estimates of positional behavior. In all, 23,000 bouts were recorded. Variation in frequency is greatest in the common behaviors, especially arboreal quadrupedalism. S…
Biology (135 obras) · Primate Behavior and Ecology (126 obras) · Ecology (87 obras) · Animal Behavior and Reproduction (65 obras) · Animal ecology (64 obras) · Ecology (64 obras) · Zoology (61 obras) · Habitat (57 obras) · Primate (57 obras) · Wildlife Ecology and Conservation (54 obras)