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Dive into the research topics where Colin M Brand is active.

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Featured researches published by Colin M Brand.


Folia Primatologica | 2017

Laterality of Grooming and Tool Use in a Group of Captive Bonobos (Pan paniscus)

Colin M Brand; Linda F. Marchant; Klaree J Boose; Frances J. White; Tabatha M. Rood; Audra Meinelt

Humans exhibit population level handedness for the right hand; however, the evolution of this behavioral phenotype is poorly understood. Here, we compared the laterality of a simple task (grooming) and a complex task (tool use) to investigate whether increasing task difficulty elicited individual hand preference among a group of captive bonobos (Pan paniscus). Subjects were 17 bonobos housed at the Columbus Zoo and Aquarium. Laterality of grooming was recorded using group scans; tool use was recorded using all-occurrence sampling. Grooming was characterized as unimanual or bimanual, and both tasks were scored as right-handed or left-handed. Most individuals did not exhibit significant hand preference for unimanual or bimanual (asymmetrical hand use) grooming, although 1 individual was lateralized for each. For the 8 subjects who engaged in termite fishing enough for statistical testing, 7 individuals exhibited significant laterality and strong individual hand preference. Four subjects preferred their left hand, 3 preferred their right, and 1 had no preference. Grooming, a simple behavior, was not lateralized in this group, yet a more complex behavior revealed a strong individual hand preference, and these results are congruent with other recent findings that demonstrate complex tasks elicit hand preference in bonobos.


Physiology & Behavior | 2018

Infant handling in bonobos (Pan paniscus): Exploring functional hypotheses and the relationship to oxytocin

Klaree J Boose; Frances J. White; Colin M Brand; Audra Meinelt; J. Josh Snodgrass

Infant handling describes interactions between infants and non-maternal group members and is widespread across mammalian taxa. The expression of infant handling behaviors, defined as any affiliative or agonistic interaction between a group member and an infant, varies considerably among primate species. Several functional hypotheses may explain the adaptive value of infant handling including the Kin Selection hypothesis, which describes handling as a mechanism through which indirect fitness is increased and predicts a bias in handling behaviors directed toward related (genetic) infants; the Alliance Formation hypothesis, which describes handling as a social commodity and predicts females with infants will support handlers during conflict; and the Learning-to-Mother hypothesis, which describes handling as a mechanism through which handlers learn species-specific maternal behaviors and predicts that handling will occur most frequently in immature and nulliparous females. Using behavioral observation and data on urinary oxytocin, a neuropeptide hormone known to modulate maternal care and social bonds in mammals, the purpose of this study was to describe the pattern of infant handling in bonobos (Pan paniscus) and to explore proposed functional hypotheses. Data show that related infant-handler dyads occurred significantly more frequently than unrelated infant-handler dyads during some of the study period and that handling was positively correlated with support during conflict. Data also showed that immature and nulliparous females handled infants significantly more than other age-sex categories and exhibited higher post handling oxytocin values than other age-sex class. The trends identified in this data set provide insight into the role oxytocin may play in facilitating care-giving behaviors in young female bonobos and help to narrow the focus of future research efforts, particularly those associated with the Kin Selection, Alliance Formation, and Learning-to-Mother functional hypotheses.


Zoo Biology | 2016

Hair plucking, stress, and urinary cortisol among captive bonobos (Pan paniscus)

Colin M Brand; Klaree J Boose; Erica C. Squires; Linda F. Marchant; Frances J. White; Audra Meinelt; J. Josh Snodgrass

Hair plucking has been observed in many captive primate species, including the great apes; however, the etiology of this behavioral pattern is poorly understood. While this behavior has not been reported in wild apes, an ethologically identical behavior in humans, known as trichotillomania, is linked to chronic psychosocial stress and is a predominantly female disorder. This study examines hair plucking (defined here as a rapid jerking away of the hair shaft and follicle by the hand or mouth, often accompanied by inspection and consumption of the hair shaft and follicle) in a captive group of bonobos (N = 13) at the Columbus Zoo and Aquarium in Columbus, Ohio. Plucking data were collected using behavior and all-occurrence sampling; 1,450 social and self-directed grooming bouts were recorded during 128 hr of observation. Twenty-one percent of all grooming bouts involved at least one instance of plucking. Urine samples (N = 55) were collected and analyzed for the stress hormone cortisol. Analyses of urinary cortisol levels showed a significant positive correlation between mean cortisol and self-directed plucking for females (r = 0.88, P < 0.05) but not for males (r = -0.73, P = 0.09). These results demonstrate an association between relative self-directed hair plucking and cortisol among female bonobos. This is the first study to investigate the relationship between hair plucking and cortisol among apes. Overall, these data add to our knowledge of a contemporary issue in captive ape management. Zoo Biol. 35:415-422, 2016.


American Journal of Primatology | 2018

Prevalence and characteristics of hair plucking in captive bonobos (Pan paniscus) in North American zoos

Colin M Brand; Linda F. Marchant

When primates exhibit hair loss and are observed to engage in self or social hair plucking (a rapid jerking away of the hair shaft and follicle by the hand or mouth, often accompanied by inspection, and consumption) the altered appearance, and behavior patterns are thought to reflect individual physiological, and psychological well‐being. Hair loss and hair plucking occur in many captive primate species, including all of the great apes. We present the first survey of this behavior among captive bonobos (N = 88; 50 females and 38 males) in seven zoos in the United States. We found that 43% of the population engaged in this behavior pattern and discounting youngsters (who are not observed to hair pluck until the age of five), 58% of individuals hair plucked. Of the individuals who hair plucked, 97% engaged in social plucking, whereas 46% engaged in self‐directed plucking. We regressed the occurrence of hair plucking with multiple predictor variables using binary logistic regression and multimodel inference to determine which predictors best explained the prevalence of self‐directed and social plucking. We also analyzed publicly available data on hair plucking in captive chimpanzees. We found that the occurrence of another abnormal behavior, age, origin, and pelage condition best explained self‐directed plucking in bonobos. Social plucking was explained by age, origin, pelage, and sex. Our analysis of chimpanzee hair plucking revealed that plucking is strongly influenced by rearing and sex. This study demonstrates that hair plucking is more prevalent in captive bonobos compared to captive chimpanzees and gorillas, however, the covariates associated with hair plucking for each species are different. Our data suggest a potential link between self‐directed plucking and well‐being. However, the higher prevalence and etiology of social hair plucking is more difficult to explain.


Applied Animal Behaviour Science | 2015

Hair plucking in captive bonobos (Pan paniscus)

Colin M Brand; Linda F. Marchant


The 86th Annual Meeting of the American Association of Physical Anthropologists, New Orleans | 2017

Crossing Structure Design and Effectiveness for Primate Conservation

India J Brock; Leslie E Gotuaco; Colin M Brand; Ulrike S Streicher; Larry R Ulibarri


The 86th Annual Meeting of the American Association of Physical Anthropologists, New Orleans | 2017

A Survey of Crossing Structures among Captive Primates

Leslie E Gotuaco; India J Brock; Colin M Brand; Ulrike S Streicher; Larry R Ulibarri


The 86th Annual Meeting of the American Association of Physical Anthropologists, New Orleans | 2017

Nearly naked apes: A survey of hair plucking among captive bonobos (Pan paniscus)

Linda F. Marchant; Colin M Brand


The 86th Annual Meeting of the American Association of Physical Anthropologists, New Orleans | 2017

Spatial Organization in Female Bonobos (Pan paniscus) Reflects Social Cohesion

Alexana J Hickmott; Colin M Brand; Klaree J Boose; Frances J. White


The 86th Annual Meeting of the American Association of Physical Anthropologists, New Orleans | 2017

Rank Differences in Male Bonobo (Pan paniscus) Reproductive Strategies

Colin M Brand; Alexana J Hickmott; Klaree J Boose; Frances J. White

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