Peter Henzi
Biographic Data
| ID | 110534 |
|---|---|
| NAME | Peter Henzi |
| GIVEN NAMES | Peter |
| FAMILY NAME | Henzi |
| SIGNATURE | HENZI P |
| AFFILIATIONS | University of KwaZulu-Natal |
| ORCID | 0000-0001-6175-1674 |
| VERIFIED | Yes |
| TOTAL WORKS | 36 |
| TOTAL CITATIONS | 190 |
| AUTHOR COUNT | 36 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 1986 |
| LATEST PUBLICATION YEAR | 2025 |
| H-INDEX | 7 |
Estimates of life history parameters in a high latitude, arid‐country vervet monkey population
We present data on life history parameters from a long‐term study of vervet monkeys in the Eastern Cape, South Africa. Estimates are presented of age at first conception for females and age at natal dispersal for males, along with the probability of survival to adulthood for infants born during the study, female reproductive life‐span, reproductive output (including lifetime reproductive success for a subset of females), and inter‐birth interval …
Sex differences in the acoustic structure of terrestrial alarm calls in vervet monkeys ( Chlorocebus pygerythrus )
The alarm calls of vervet monkeys ( Chlorocebus pygerythrus ) have been the subject of considerable focus by researchers, owing primarily to the purported referential qualities of different alarm call types. With this focus on reference, acoustic variation among calls elicited by the same range of predators has typically been overlooked. Specifically, at least one type of alarm call—the terrestrial alarm—was described over 50 years ago as being a…
Social induction and the developmental trajectory of participation in intergroup conflict by vervet monkeys
We assess the proposition that intergroup conflict (IGC) in non-human primates offers a useful comparison for studies of human IGC and its links to parochial altruism and prosociality. That is, for non-linguistic animals, social network integration and maternal influence promote juvenile engagement in IGC and can serve as the initial grounding for sociocultural processes that drive human cooperation. Using longitudinal data from three cohorts of …
Infrared thermography cannot be used to approximate core body temperature in wild primates
Understanding the physiological processes that underpin primate performance is key if we are to assess how a primate might respond when navigating new and changing environments. Given the connection between a mammal's ability to thermoregulate and the changing demands of its thermal environment, increasing attention is being devoted to the study of thermoregulatory processes as a means to assess primate performance. Infrared thermography can be u…
Keeping cool in the heat: Behavioral thermoregulation and body temperature patterns in wild vervet monkeys
OBJECTIVES: Climate change is having a significant impact on biodiversity and increasing attention is therefore being devoted to identifying the behavioral strategies that a species uses to cope with climatic stress. We explore how wild vervet monkeys (Chlorocebus pygerythrus) respond to heat stress, and how behavioral adaptations are used to regulate body temperature. MATERIALS AND METHODS: We implanted wild vervet monkeys with temperature-sensi…
Modeling variation in the growth of wild and captive juvenile vervet monkeys in relation to diet and resource availability
OBJECTIVES: To compare longitudinal weight gain in captive and wild juvenile vervet monkeys and conduct an empirical assessment of different mechanistic growth models. METHODS: Weights were collected from two groups of captive monkeys and two consecutive cohorts of wild monkeys until the end of the juvenile period (~800 days). The captive groups were each fed different diets, while the wild groups experienced different ecological conditions. Thre…
Functional social structure in baboons: Modeling interactions between social and environmental structure in group-level foraging
Ability emotional intelligence and children’s behaviour in the playground
We explored whether emotion understanding promotes positive social functioning in childhood using the ability emotional intelligence (AEI) framework, which defines emotion understanding more broadly than is common in developmental science. The prospective study included children ages 9–11 years who completed a measure of AEI at the start of the school year, and whose playground interactions were observed for one full year. Findings showed that, a…
Thermal consequences of increased pelt loft infer an additional utilitarian function for grooming
A strong case has been made that the primary function of grooming is hygienic. Nevertheless, its persistence in the absence of hygienic demand, and its obvious tactical importance to members of primate groups, underpins the view that grooming has become uncoupled from its utilitarian objectives and is now principally of social benefit. We identify improved thermoregulatory function as a previously unexplored benefit of grooming and so broaden our…
Taking the aggravation out of data aggregation: A conceptual guide to dealing with statistical issues related to the pooling of individual‐level observational data
Field data often include multiple observations taken from the same individual. In order to avoid pseudoreplication, it is commonplace to aggregate data, generating a mean score per individual, and then using these aggregated data in subsequent analyses. Aggregation, however, can generate problems of its own. Not only does it lead to a loss of information, it can also leave analyses vulnerable to the "ecological fallacy": the drawing of false infe…
Behavioral flexibility of vervet monkeys in response to climatic and social variability
Responses to environmental variability sheds light on how individuals are able to survive in a particular habitat and provides an indication of the scope and limits of its niche. To understand whether climate has a direct impact on activity, and determine whether vervet monkeys have the behavioral flexibility to respond to environmental change, we examined whether the amount of time spent resting and feeding in the nonmating and mating seasons we…
Evidence for scent marking in vervet monkeys?
Troop Size, Habitat Use, and Diet of Chacma Baboons (Papio hamadryas ursinus) in Commercial Pine Plantations: Implications for Management
What role do olfactory cues play in chacma baboon mating
The probability of ovulation in a number of primate species is associated with both visual and auditory cues. We use 18‐month behavioral data from two chacma baboon troops to provide the first systematic assessment of the possibility that olfactory cues are also involved. Using variance in the rate of olfactory inspection by males as a proxy for changes in the intensity of female vaginal odor, we found that rates of inspection were broadly correl…
Fission-Fusion Dynamics: New Research Frameworks
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…
Look who's talking: Developmental trends in the size of conversational cliques
Indices of environmental temperatures for primates in open habitats
Indices of environmental temperatures for primates in open habitats
Habitual cave use and thermoregulation in chacma baboons (Papio hamadryas ursinus)
Evolutionary ecology, sexual conflict, and behavioral differentiation among baboon populations
A central assumption of baboon socio‐ecological models is that all populations have the same capacity to react to different environments. The burden of our argument is that this assumption needs to be reconsidered. Data suggest not only that hamadryas, but chacma as well, differ in interesting ways from the stock baboon model that has been derived, in the main, from earlier work on anubis and cynocephalus. Although environmental factors are behin…
Second to fourth digit ratio: Ethnic differences and family size in English, Indian and South African populations
2D:4D showed weak sex and strong ethnic differences. Low values of 2D:4D were associated with large family size in men. The situation was less clear in women but on balance there was evidence to support a relationship between high values of 2D:4D and large family size
Fatal Attack on an Adult Female Cercopithecus mitis erythrarchus: Implications for Female Dispersal in Female-Bonded Societies
The 2nd: 4Th Digit Ratio, Sexual Dimorphism, Population Differences, and Reproductive Success
Effects of sexual dimorphism on facial attractiveness
Population structure, demography, and dynamics of mountain baboons: An interim report
Counts of 61 baboon troops ( Papio cynocephalus ursinus ) at four localities in the Drakensberg mountains confirmed earlier reports of a small mean troop size. This troop size of 22.49 animals changed neither with latitude nor elevation. Data from two of the sites suggested that population density increases from south to north, while a working assumption of 2.5 animals/ km 2 allowed us to set the population size at 7,540 animals, living in 335 tr…
Fission-Fusion Dynamics: New Research Frameworks
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…
The behavioral ecology of mountain baboons
Habitual cave use and thermoregulation in chacma baboons (Papio hamadryas ursinus)
Patterns of movement by baboons in the Drakensberg mountains: Primary responses to the environment
Behavioral flexibility of vervet monkeys in response to climatic and social variability
Responses to environmental variability sheds light on how individuals are able to survive in a particular habitat and provides an indication of the scope and limits of its niche. To understand whether climate has a direct impact on activity, and determine whether vervet monkeys have the behavioral flexibility to respond to environmental change, we examined whether the amount of time spent resting and feeding in the nonmating and mating seasons we…
One-male groups and intergroup interactions of mountain baboons
Environmental correlates of gastrointestinal parasitism in montane and lowland baboons in Natal, South Africa
The gastrointestinal parasites ofPapio ursinus from the Drakensberg Mountains, Republic of South Africa
Troop Size, Habitat Use, and Diet of Chacma Baboons (Papio hamadryas ursinus) in Commercial Pine Plantations: Implications for Management
Fatal Attack on an Adult Female Cercopithecus mitis erythrarchus: Implications for Female Dispersal in Female-Bonded Societies
Mothers, fathers, and children in an urban park playground: A comparison of dyads and triads
Comparaison des interactions dans des dyades mere-enfant, des dyades pere-enfant et des triades pere-mere-enfant observees dans l'aire de jeu d'un parc
Keeping cool in the heat: Behavioral thermoregulation and body temperature patterns in wild vervet monkeys
OBJECTIVES: Climate change is having a significant impact on biodiversity and increasing attention is therefore being devoted to identifying the behavioral strategies that a species uses to cope with climatic stress. We explore how wild vervet monkeys (Chlorocebus pygerythrus) respond to heat stress, and how behavioral adaptations are used to regulate body temperature. MATERIALS AND METHODS: We implanted wild vervet monkeys with temperature-sensi…
The relationship between altitude and group size in mountain baboons (Papio cynocephalus ursinus)
Functional social structure in baboons: Modeling interactions between social and environmental structure in group-level foraging
Ability emotional intelligence and children’s behaviour in the playground
We explored whether emotion understanding promotes positive social functioning in childhood using the ability emotional intelligence (AEI) framework, which defines emotion understanding more broadly than is common in developmental science. The prospective study included children ages 9–11 years who completed a measure of AEI at the start of the school year, and whose playground interactions were observed for one full year. Findings showed that, a…
Strategic responses of male samango monkeys (Cercopithecus mitis) to a decline in the number of receptive females
The gastrointestinal parasites ofPapio ursinus from the Drakensberg Mountains, Republic of South Africa
The behavioral ecology of mountain baboons
One-male groups and intergroup interactions of mountain baboons
Mothers, fathers, and children in an urban park playground: A comparison of dyads and triads
Comparaison des interactions dans des dyades mere-enfant, des dyades pere-enfant et des triades pere-mere-enfant observees dans l'aire de jeu d'un parc
Strategic responses of male samango monkeys (Cercopithecus mitis) to a decline in the number of receptive females
Social relationships of mountain baboons: Leadership and affiliation in a non‐female‐bonded monkey
Instead of close and differentiated relationship among adult females, the accepted norm for savanna baboons, groups of Drakensberg mountain baboons ( Papio ursinus ) showed strong affiliation of females towards a single male. The same male was usually the decision‐making animal in controlling group movements. Lactating or pregnant females focused their grooming on this “leader” male, producing a radially patterned sociogram, as in the desert babo…
Social relationships of mountain baboons: Leadership and affiliation in a non‐female‐bonded monkey
Instead of close and differentiated relationships among adult females, the accepted norm for savanna baboons, groups of Drakensberg mountain baboons ( Papio ursinus ) showed strong affiliation of females towards a single male. The same male was usually the decision‐making animal in controlling group movements. Lactating or pregnant females focused their grooming on this “leader” male, producing a radially patterned sociogram, as in the desert bab…
The relationship between altitude and group size in mountain baboons (Papio cynocephalus ursinus)
The differential use of cheek pouches in a troop ofPapio ursinus
Patterns of movement by baboons in the Drakensberg mountains: Primary responses to the environment
Environmental correlates of gastrointestinal parasitism in montane and lowland baboons in Natal, South Africa
Population structure, demography, and dynamics of mountain baboons: An interim report
Counts of 61 baboon troops ( Papio cynocephalus ursinus ) at four localities in the Drakensberg mountains confirmed earlier reports of a small mean troop size. This troop size of 22.49 animals changed neither with latitude nor elevation. Data from two of the sites suggested that population density increases from south to north, while a working assumption of 2.5 animals/ km 2 allowed us to set the population size at 7,540 animals, living in 335 tr…
Effects of sexual dimorphism on facial attractiveness
The 2nd: 4Th Digit Ratio, Sexual Dimorphism, Population Differences, and Reproductive Success
Evolutionary ecology, sexual conflict, and behavioral differentiation among baboon populations
A central assumption of baboon socio‐ecological models is that all populations have the same capacity to react to different environments. The burden of our argument is that this assumption needs to be reconsidered. Data suggest not only that hamadryas, but chacma as well, differ in interesting ways from the stock baboon model that has been derived, in the main, from earlier work on anubis and cynocephalus. Although environmental factors are behin…
Second to fourth digit ratio: Ethnic differences and family size in English, Indian and South African populations
2D:4D showed weak sex and strong ethnic differences. Low values of 2D:4D were associated with large family size in men. The situation was less clear in women but on balance there was evidence to support a relationship between high values of 2D:4D and large family size
Fatal Attack on an Adult Female Cercopithecus mitis erythrarchus: Implications for Female Dispersal in Female-Bonded Societies
Indices of environmental temperatures for primates in open habitats
Indices of environmental temperatures for primates in open habitats
Habitual cave use and thermoregulation in chacma baboons (Papio hamadryas ursinus)
Look who's talking: Developmental trends in the size of conversational cliques
Fission-Fusion Dynamics: New Research Frameworks
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…
What role do olfactory cues play in chacma baboon mating
The probability of ovulation in a number of primate species is associated with both visual and auditory cues. We use 18‐month behavioral data from two chacma baboon troops to provide the first systematic assessment of the possibility that olfactory cues are also involved. Using variance in the rate of olfactory inspection by males as a proxy for changes in the intensity of female vaginal odor, we found that rates of inspection were broadly correl…
Troop Size, Habitat Use, and Diet of Chacma Baboons (Papio hamadryas ursinus) in Commercial Pine Plantations: Implications for Management
Evidence for scent marking in vervet monkeys?
Biology (31 works) · Primate Behavior and Ecology (28 works) · Ecology (20 works) · Animal Behavior and Reproduction (18 works) · Animal Vocal Communication and Behavior (17 works) · Demography (17 works) · Zoology (17 works) · Psychology (14 works) · Animal ecology (13 works) · Ecology (12 works)