AJP Featured Articles

Do "birds of a feather flock together" or do "opposites attract"?  Behavioral responses and temperament predict success in pairings of rhesus monkeys in a laboratory setting.

Authors: John P. Capitanio, Shelley A. Blozis, Jessica Snarr, Adrianne Steward, Brenda J. McCowan.

As the Office of Laboratory Animal Welfare has stated “There is universal agreement among oversight agencies that nonhuman primates should be socially housed.”  Achieving this goal can be challenging, however.  In a laboratory setting, social housing is sometimes accomplished by pairing animals, but the literature is unclear on whether use of pre-pairing behavioral/temperament information can increase the success rate of pairings.  What kind of behavioral information might be most useful?  And once identified, is success increased when animals are most similar or if animals’ characteristics complement each other?  We extracted a database comprising n=340 isosexual pairing attempts at the California National Primate Research Center, in which both members of the pair had participated in a BioBehavioral Assessment program at 3-4 months of age; pairing attempts occurred when animals ranged from 1.2 to 11.1 years of age.  Among females, success was higher when members of a pair had similar values (i.e., a smaller difference score) on measures of emotional responding during the infant assessments.  In contrast, among males, pairing success was more likely when members of the pair had lower averaged values for Gentle and Nervous temperament scores; when they were younger; when pairs had a greater weight difference; and when they came from the same rearing background.  Together, our results suggest that broad measures reflecting patterns of emotionality in response to challenge, which can be assessed in infancy (but which remain relatively stable throughout life) can be usefully employed to increase the likelihood of success in pairing attempts.

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A New Conservation Strategy for China – A Model Starting With Primates.

Authors: Ruliang Pan, Charles Oxnard, Cyril C. Grueter, Baoguo Li, Xiao-Guang Qi, Hang He, Songtao Guo and Paul A. Garber.

In this commentary we propose a new strategy for animal conservation and environmental protection (ACEP) in China starting with primates. Despite their taxonomic diversity, 22 of the 25 primate species in China are currently threatened or endangered. We present a brief overview of the historical, social, and economic drivers of land cover change and habitat degradation that have occurred in China over the past 400 years.  We also describe our efforts to bring together Chinese and international scientists, NGOs, faculty at Northwest University (Xi’an, China), the University of Western Australia, the University of Illinois, Urbana, IL USA and Chinese governmental officials to integrate dynamic modelling techniques using climatological, geographical, economic, ecological, sociological, demographic, and natural resource databases to promote effective measures of conservation in China.  Models of past, current and future environmental changes will be targeted to educational institutions, scientists, the internet and social media to arouse public awareness of the current and long-term environmental problems facing China. An international ACEP centre is being developed at Northwest University, Xi’an, China, to lead this initiative. Scientifically generated data sets will be shared with international scientists, NGOs and Chinese governmental officials to overcome the barriers of language and differences in culture, ideology, transparency, and systems of administration and bureaucracy. The goal of this initiative is to work with the Chinese government to reverse centuries of unsustainable environmental change and promote conservation of endangered species and habitats.  Once appropriate databases have been developed, we plan to extend their application to other animal taxa in China as well as to other global regions. We invite other scientists to join us in this effort.

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Previous Abstracts

Hand preference on unimanual and bimanual tasks in strepsirrhines: The case of the ring-tailed lemur (Lemur catta)

Factors affecting cashew processing by wild bearded capuchin monkeys (Sapajus libidinosus, Kerr 1792).

Modelling infection transmission in primate networks to predict centrality-based risk

Survey of 2014 behavioral management programs for laboratory primates in the United States

Thermal consequences of increased pelt loft infer an additional utilitarian function for grooming


Body mass in wild bearded capuchins (Sapajus libidinosus): Ontogeny and sexual dimorphism

Targeting or supporting, what drives patterns of aggressive intervention in fights?

Long-term home range use in white-handed gibbons (Hylobates lar) in Khao Yai National Park, Thailand

First-time rhesus monkey mothers, and mothers of sons, preferentially engage in face-to-face interactions with their infants

Shades of gray mouse lemurs: Ontogeny of female dominance and dominance-related behaviors in a nocturnal primate.

Patterns of Male Dispersal in Verreaux’s Sifaka (Propithecus verreauxi) at Kirindy Mitea National Park.

The Influence of Male Takeovers on Female Dispersal in Colobus vellerosus

Locating chimpanzee nests and identifying fruiting trees with an Unmanned Aerial Vehicle

Gorilla with white sclera: a naturally occurring variation in a morphological trait linked to social cognitive functions.

Measurement of 25-hydroxyvitamin D2&3 and 1, 25  dihydroxyvitamin D2&3 by Tandem Mass Spectrometry: A Primate Multispecies Comparison.

Validation of an acoustic location system to monitor Bornean orangutan (Pongo pygmaeus wurmbii) long calls

Influence of age, reproductive cycling status, and menstruation on the vaginal microbiome in baboons (Papio anubis)

Primate Kinship: Contributions from Cayo Santiago

Incorporating ecology and social system into formal hypotheses to guide field studies of color vision in primates

Tool use for food acquisition in a wild mountain gorilla (Gorilla beringei beringei).

Long-Term Effects of Tetanus Toxoid Inoculation on the Demography and Life Expectancy of the Cayo Santiago Rhesus Macaques.

The importance of social play networks for infant or juvenile wild chimpanzees at Mahale Mountains National Park, Tanzania.

The Development of an Instrument to Measure Global Dimensions of Maternal Care in Rhesus Macaques (Macaca mulatta)

Sources of Tooth Wear Variation Early in Life Among Known-Aged Wild Ring-Tailed Lemurs (Lemur catta) at the Beza Mahafaly Special Reserve, Madagascar.

Vertical stratification of the nutritional value of fruit: Macronutrients and condensed tannins.

Nutrition and foraging strategies of the black howler monkey (Alouatta pigra) in Palenque National Park, Mexico.

On the tool use behavior of the bonobo-chimpanzee last common ancestor, and the origins of hominine stone tool use.

The adaptive value of primate color vision for predator detection

Mountain gorilla ranging patterns: influence of group size and group dynamics

Leaf chemistry as a predictor of primate biomass and the mediating role of food selection: a case study in a folivorous lemur (Propithecus verreauxi)

Using virtual reality to investigate comparative spatial cognitive abilities in chimpanzees and humans

The effect of energetic and psychosocial stressors on glucocorticoids in mantled howler monkeys (Alouatta palliata).

Seasonal variation in the length of the daily activity period in buffy-headed marmosets (Callithrix flaviceps): an important consideration for the analysis of foraging strategies in observational field studies of primates

Diet adaptation of the western black crested gibbon (Nomascus concolor) in an isolated and disturbed forest fragment in southern Yunnan, China

Spatial working memory in immersive virtual reality foraging: path organization, traveling distance and search efficiency in humans (Homo sapiens)

The risk of tuberculosis transmission to free-ranging great apes.

Patterns of movement and seed dispersal by three lemur species.

Extra-pair paternity confirmed in wild white-handed gibbons

Death of the (Traveling) Salesman: primates do not show clear evidence of multi-step route planning

Obligate exudativory characterizes the diet of the pygmy slow loris Nycticebus pygmaeus

Risk factors for stereotypic behavior and self-biting in rhesus macaques (Macaca mulatta): animal’s history, current environment, and personality

Chimpanzee nesting patterns in a savanna habitat: Environmental influences and preferences

Developing a Comprehensive and Comparative Questionnaire for Measuring Personality in Chimpanzees using a Simultaneous Top-down/Bottom-up Design

Analyzing visual signals as visual scenes

Food eaten by the Sichuan snub-nosed monkey (Rhinopithecus roxellana) in Shennongjia National Nature Reserve, China, in relation to nutritional chemistry

Death of the alpha: within-community lethal violence among chimpanzees of the Mahale Mountains National Park

Auditory memory in monkeys: costs and benefits of proactive interference

Cortical Networks for Ethologically Relevant Behaviors in Primates

Did trichromatic color vision and red hair color co-evolve in primates?

Dietary Flexibility of the Brown Howler Monkey throughout its Geographic Distribution 

Contrast Imaging Ultrasound Detects Abnormalities in the Marmoset Ovary

Introducing fecal stable isotope analysis in primate weaning studies

Maternal effects and the endocrine regulation of mandrill growth

Disability, compensatory behavior and innovation in free-ranging adult female Japanese macaques (Macaca fuscata)

Consequences of lethal intragroup aggression and alpha male replacement on intergroup relations and home range use in tufted capuchin monkeys (Cebus apella nigritus)

Co-evolution of facial expression and social tolerance in macaques

Behavioral responses of Cao Vit gibbon (Nomascus nasutus) to variations in food abundance and temperature in Bangliang, Jingxi, China

Muscle mass scaling in primates: An energetic and ecological perspective.

Hormonal and experiential predictors of infant survivorship and maternal behavior in a monogamous primate (Callicebus cupreus).

Inequity aversion in relation to effort and relationship quality in long-tailed macaques (Macaca fascicularis).

Sex differences in the stone tool-use behavior of a wild population of Burmese long-tailed macaques (Macaca fascicularis aurea).

Genetic evidence for dispersal by both sexes in the Central American Squirrel Monkey, Saimiri oerstedii citrinellus

Demography of squirrel monkeys (Saimiri sciureus) in captive environments and its effect on population growth

Genotyping single nucleotide polymorphisms (SNPs) across species in Old World Monkeys

Social behavior, foraging strategies and fecal glucocorticoids in female blue monkeys (Cercopithecus mitis): Potential fitness benefits of high rank in a forest guenon

Analysis of the hydrogenotrophic microbiota of wild and captive black howler monkeys (Alouatta pigra) in Palenque National Park, Mexico

Social network analysis in the study of nonhuman primates: A historical perspective

Alternative routes to the leader male role in a multi-level society: follower versus solitary male strategies and outcomes in hamadryas baboons

Effects of anthropogenic  disturbance on indri (Indri indri) health in Madagascar.

When and how well can human-socialized capuchins match actions demonstrated by a familiar human?

Death among geladas (Theropithecus gelada): a broader perspective on mummified infants and primate thanatology.

Female philopatry and dominance patterns in wild geladas.

Characterization of Opsin Gene Alleles Affecting Color Vision in a Wild Population of Titi Monkeys (Callicebus brunneus)

A Coevolutionary Relationship Between Striatum Size and Social Play in Nonhuman Primates

Pattern of maternal circulating CRH in laboratory-housed squirrel and owl monkeys.

Male dominance and reproductive success in wild white-faced capuchins (Cebus capucinus) at Lomas Barbudal, Costa Rica

Ape behavior in two alternating environments: Comparing exhibit and short-term holding areas.