Sally P Mendoza
Biographic Data
| ID | 627784 |
|---|---|
| NAME | Sally P Mendoza |
| GIVEN NAMES | Sally P |
| FAMILY NAME | Mendoza |
| SIGNATURE | MENDOZA S P |
| AFFILIATIONS | University of California, Davis |
| VERIFIED | No |
| TOTAL WORKS | 32 |
| TOTAL CITATIONS | 45 |
| WORKS AS AUTHOR | 32 |
| WORKS AS EDITOR | 0 |
| FIRST PUBLICATION YEAR | 1982 |
| LATEST PUBLICATION YEAR | 2024 |
| H-INDEX | 2 |
Obituary and tributes
American Journal of PrimatologyEarly View e23574 COMMENTARY Obituary and tributes: William Alvin Mason (1926−2023) John P. Capitanio, Corresponding Author John P. Capitanio [email protected] orcid.org/0000-0002-3680-1323 California National Primate Research Center, University of California, Davis, California, USA Correspondence John P. Capitanio, California National Primate Research Center, University of California, Davis, CA, USA. Email: [email …
Relationship tenure differentially influences pair‐bond behavior in male and female socially monogamous titi monkeys ( Callicebus cupreus )
Pair‐bonded primates have uniquely enduring relationships and partners engage in a suite of behaviors to maintain these close bonds. In titi monkeys, pair bond formation has been extensively studied, but changes across relationship tenure remain unstudied. We evaluated differences in behavioral indicators of pair bonding in newly formed (~6 months paired, n = 9) compared to well‐established pairs (average 3 years paired, n = 8) of titi monkeys ( …
Effects of pair bonding on dopamine D1 receptors in monogamous male titi monkeys ( Callicebus cupreus )
Pair bonding leads to increases in dopamine D1 receptor (D1R) binding in the nucleus accumbens of monogamous prairie voles. In the current study, we hypothesized that there is similar up‐regulation of D1R in a monogamous primate, the titi monkey ( Callicebus cupreus ). Receptor binding of the D1R antagonist [ 11 C]‐SCH23390 was measured in male titi monkeys using PET scans before and after pairing with a female. We found that within‐subject analy…
Infant titi monkey behavior in the open field test and the effect of early adversity
The open field test is commonly used to measure anxiety-related behavior and exploration in rodents. Here, we used it as a standardized novel environment in which to evaluate the behavioral response of infant titi monkeys (Callicebus cupreus), to determine the effect of presence of individual family members, and to assess how adverse early experience alters infant behavior. Infants were tested in the open field for 5 days at ages 4 and 6 months i…
Alternative Models for Small Samples in Psychological Research
Unavoidable sample size issues beset psychological research that involves scarce populations or costly laboratory procedures. When incorporating longitudinal designs these samples are further reduced by traditional modeling techniques, which perform listwise deletion for any instance of missing data. Moreover, these techniques are limited in their capacity to accommodate alternative correlation structures that are common in repeated measures stud…
Laboratory simulations of mate‐guarding as a component of the pair‐bond in male titi monkeys, Callicebus cupreus
Mate-guarding and territorial aggression (both intra- and inter-sexual) are behavioral components of social monogamy seen in male coppery titi monkeys (Callicebus cupreus) both in the field and in the laboratory. Methodology for studying these behaviors in captivity facilitates the translation of questions between field and laboratory. In this study, we tested whether exposure to a mirror would stimulate mate-guarding behavior in male titi monkey…
Population genetics of the California National Primate Research Center’s (CNPRC) captive Callicebus cupreus colony
Differences in Titi Monkey ( Callicebus cupreus ) Social Bonds Affect Arousal, Affiliation, and Response to Reward
Titi monkeys ( Callicebus cupreus ) are a monogamous, New World primate. Adult pair‐mates form a bidirectional social bond and offspring form a selective unidirectional bond to their father. Some of the neurobiology involved in social bonds and maternal behavior is similar to the neural circuitry involved in nonsocial reward. Due to these overlapping mechanisms, social states may affect responses to external rewarding stimuli. We sought to determ…
Hormonal and Experiential Predictors of Infant Survivorship and Maternal Behavior in a Monogamous Primate ( C allicebus cupreus )
To better understand the roles that hormones and experience play in infant survival and maternal behavior in a biparental primate species, we analyzed urinary estrone ( E 1 C ) and pregnanediol glucuronide ( PdG ) from 24 socially housed titi monkey ( C allicebus cupreus) females over 54 pregnancies ( N = 1,430 samples). Pregnancies were categorized according to whether the infant survived ( N = 35) or not ( N = 19), and by maternal parity (primi…
Behavioral Inhibition Is Associated With Airway Hyperresponsiveness but not Atopy in a Monkey Model of Asthma
OBJECTIVE: To determine whether indicators of behavioral inhibition and cortisol responses to stressful situations, obtained in infancy, were associated with asthma-related measures (atopy and airway hyperresponsiveness [AHR]) approximately 2 years later. METHODS: Measures reflecting inhibited temperament and cortisol response after a 25-hour separation from mother and relocation to a novel room were obtained for 21 rhesus monkeys (mean age, 109 …
Social Stress Desensitizes Lymphocytes to Regulation by Endogenous Glucocorticoids
OBJECTIVE: To determine whether chronic social stress can desensitize leukocytes to normal physiologic regulation by endogenous glucocorticoids. METHODS: We analyzed the longitudinal relationship between plasma cortisol levels and peripheral blood lymphocyte counts over 16 monthly assessments in 18 rhesus macaques randomized to recurrent social encounters with a stable set of conspecifics or continually varying social partners (unstable socializa…
The Biology of Paternal Care in Human and Nonhuman Primates
Among primates, intense paternal care is manifested in only a few distantly related species, including humans. Thus, neither purely phylogenetic nor socioecological hypotheses can explain its presence or the variability in the expression of paternal behaviors. Traditional theoretical models for the evolution of paternal care can now be reexamined, focusing on male-female interactions as a possible key to understanding parental strategies. At a pr…
Amygdalectomy and responsiveness to novelty in rhesus monkeys (Macaca mulatta)
Rhesus monkeys (Macaca mulatta) with bilateral ibotenic acid-produced lesions of the amygdala were compared with controls in several novel situations, including exposures to metal objects, toy animals, and a person. Early in testing, the monkeys with lesions showed reduced inhibitions on responsiveness compared with controls. With continuing exposures, differences between groups diminished sharply as inhibitions waned in the controls. This outcom…
Are subordinates always stressed? a comparative analysis of rank differences in cortisol levels among primates
Personality influences tetanus‐specific antibody response in adult male rhesus macaques after removal from natal group and housing relocation
Previous research has suggested that personality is related to immune function in macaques. Using a prospective design, we examined whether variation in the personality dimension “Sociability” in adult male rhesus macaques ( Macaca mulatta ) was related to the in vivo secondary antibody response to a tetanus toxoid booster immunization following removal from natal groups and relocation to individual housing. We also explored whether the timing of…
Nature of proximate mechanisms underlying primate social systems
Given the complexity of primate so-cial systems, it is not surprising that the search for proximate mechanisms is a daunting task. We have long known that the types of social groups that primates form and maintain are characteristic of a given species.1 It is also clear that social systems emerge from interactions between individu-als.2 Understanding proximate mech-anisms contributing to social systems, therefore, requires a focus on the ten-denc…
Developmental changes in responsiveness to parents and unfamiliar adults in a monogamous monkey ( Callicebus moloch )
Titi monkeys ( Callicebus moloch ) are monogamous New World primates that are characteristically found in family‐type groups consisting of a mated adult pair and one or two young. The factors maintaining the small size of these groups are not known. Based on observations of free‐ranging and captive families, parental aggression toward older offspring seems unlikely to play a significant role. Maturing individuals themselves, however, could underg…
Excretion and measurement of estradiol and progesterone metabolites in the feces and urine of female squirrel monkeys ( Saimiri sciureus )
The first objective of the present study was to determine the metabolic form and rate of excretion of ovarian hormone metabolites in the urine and feces of female squirrel monkeys injected with radiolabeled progesterone (Po) and estradiol. The major portion of the urinary metabolites of both hormones was excreted within 16–24 hr post‐injection. Estrogen and Po isotopes in feces exhibited an excretion peak at 16 hr post‐injection. The majority of …
The beginning of an alternative view of the neurobiology of emotion
This article attempts to provide a sketch of the neurobiology of emotion that includes essential aspects of emotion as identified by personality and social psychologists. We offer a model of emotion that includes a negative valence system with the amygdala at its core and a positive evaluation system with the nucleus accumbens at its core. The apparent specificity of emotion is conferred by the additional contribution of two monoaminergic systems…
Reproductive biology of female titi monkeys (Callicebus moloch) in captivity
Titi monkeys (Callicebus spp., Cebidae) are monogamous neotropical primates that live in family-like groups typically consisting of an adult monogamous pair and one or two young. Knowledge about the reproductive biology of this genus is scanty. This study investigated the reproductive biology of female dusky titi monkeys (Callicebus moloch). An initial analysis characterized reproductive parameters of 32 females from a captive colony maintained f…
Annual physiological changes in individually housed squirrel monkeys (Saimiri sciureus)
This study investigated whether annual changes in physiology occur in individually housed squirrel monkeys (Saimiri sciureus). Physiological measures were monitored for 20 months. Over the course of the study, all individually housed males and females exhibited clear annual changes in gonadal and adrenal hormone levels, and males exhibited species-typical changes in body weight. Females exhibited a typical pattern of hormonal changes, with elevat…
Individual differences in peripheral blood immunological and hormonal measures in adult male rhesus macaques (Macaca mulatta)
A growing body of research has indicated that consistent individual differences exist in physiological systems with which the immune system interacts. Few data have been reported that demonstrate stable individual differences in immunological measures, however. In the present study, enumerative measures of immune system activity were examined in 36 adult male rhesus macaques over a 13 month period under baseline conditions as well as under condit…
Effects of duration of separation on responses to mates and strangers in the monogamous titi monkey (Callicebus moloch)
Adult male and female titi monkeys form an intense social bond characterized by high levels of affiliative interactions between pairmates and agonistic responses to strangers. In natural settings, separation between mates can vary from brief periods, as when mates drift apart during feeding, to permanent separation, occasioned by desertion or death. In this study we asked how different durations of separation altered the behavior of male and fema…
Effects of duration of separation on responses to mates and strangers in the monogamous titi monkey (Callicebus moloch)
Adult male and female titi monkeys form an intense social bond characterized by high levels of affiliative interactions between pairmates and agonistic responses to strangers. In natural settings, separation between mates can vary from brief periods, as when mates drift apart during feeding, to permanent separation, occasioned by desertion or death. In this study we asked how different durations of separation altered the behavior of male and fema…
Heart rate patterns under stress in three species of macaques
Cardiac responses during one hour exposures to three stressful experimental conditions were compared among juvenile females of three species of the genus Macaca ( M. mulatta, M. radiata , and M. fascicularis ). M. fascicularis showed the highest overall heart rate, and M. mulatta the lowest, in all three conditions. The principal difference between species was in the pattern of change in heart rate over the test sessions. Heart rate declined duri…
The Biology of Paternal Care in Human and Nonhuman Primates
Among primates, intense paternal care is manifested in only a few distantly related species, including humans. Thus, neither purely phylogenetic nor socioecological hypotheses can explain its presence or the variability in the expression of paternal behaviors. Traditional theoretical models for the evolution of paternal care can now be reexamined, focusing on male-female interactions as a possible key to understanding parental strategies. At a pr…
Nature of proximate mechanisms underlying primate social systems
Given the complexity of primate so-cial systems, it is not surprising that the search for proximate mechanisms is a daunting task. We have long known that the types of social groups that primates form and maintain are characteristic of a given species.1 It is also clear that social systems emerge from interactions between individu-als.2 Understanding proximate mech-anisms contributing to social systems, therefore, requires a focus on the ten-denc…
The beginning of an alternative view of the neurobiology of emotion
This article attempts to provide a sketch of the neurobiology of emotion that includes essential aspects of emotion as identified by personality and social psychologists. We offer a model of emotion that includes a negative valence system with the amygdala at its core and a positive evaluation system with the nucleus accumbens at its core. The apparent specificity of emotion is conferred by the additional contribution of two monoaminergic systems…
Behavioral processes leading to linear status hierarchies following group formation in rhesus monkeys
Behavior and plasma cortisol following brief peer separation in juvenile squirrel monkeys
The effects of 30‐min separation from peers on behavior and plasma cortisol levels were studied in juvenile, mother‐reared, female squirrel monkeys, housed in triads. Juveniles vocalized much more frequently when isolated in a novel room than they did when either undisturbed, handled only, placed with both peers in a novel room, or separated from one peer and housed with the other in the home cage. When separated from one peer in the home cage, t…
Behavioral processes leading to linear status hierarchies following group formation in rhesus monkeys
Species differences in adrenocortical activity of new world primates
The effect of dexamethasone‐induced alteration of adrenocortical activity was assessed in two species of New World primates: Saimiri sciureus and Callicebus moloch . Basal and stress levels of corticosteroids were determined following treatment with three doses of dexamethasone (0, 50, or 500 μg/kg). Saimiri showed substantially higher basal levels of corticosteroids than did Callicebus and a greater incremental corticosteroid response to physica…
Comparative studies of social behavior in Callicebus and Saimiri
Comparisons were made of the behavioral and physiological responses of heterosexual pairs of two closely related New World primates, Callicebus moloch and Saimiri sciureus , to confrontations with unfamiliar pairs. Subject pairs were exposed to strangers in two situations differing in the presumed degree of arousal they imposed: obligatory (full visual exposure) and facultative (one part of the test cage allowed visual withdrawal). Behavioral rea…
Social Cohesion
Social cohesion is the outcome of the social and physiological processes through which individuals become linked into social systems. These linkages, as they occur in social relationships and are found in small group interactions, are the common focus of this collection of essays. The volume begins with an exploration of social relationships as regulators of physiology and behavior. Other essays investigate issues such as dominance, ideological c…
Sociophysiology of squirrel monkeys
Primate sociophysiology is an emerging discipline concerned with understanding the proximate mechanisms that contribute to the generation and maintenance of species‐typical social systems. Studies of squirrel monkeys illustrate that sociophysiological processes are more varied than is commonly assumed with respect to both the effective social dimensions that influence physiological function and the nature of concomitant physiological effects. For…
Heart rate patterns under stress in three species of macaques
Cardiac responses during one hour exposures to three stressful experimental conditions were compared among juvenile females of three species of the genus Macaca ( M. mulatta, M. radiata , and M. fascicularis ). M. fascicularis showed the highest overall heart rate, and M. mulatta the lowest, in all three conditions. The principal difference between species was in the pattern of change in heart rate over the test sessions. Heart rate declined duri…
Psychosocial and hormonal aspects of hierarchy formation in groups of male squirrel monkeys
Accounts of primate social dominance hierarchies often imply that the achievement of superior status is a “goal”, akin to a valued resource or commodity, and that hierarchies emerge in multimale groups from prolonged competitive conflicts over social status. This possibility is not consistent with our observations of five newly formed triads of adult male squirrel monkeys ( Saimiri sciureus ). Stable linear hierarchies based on clear asymmetries …
Effects of duration of separation on responses to mates and strangers in the monogamous titi monkey (Callicebus moloch)
Adult male and female titi monkeys form an intense social bond characterized by high levels of affiliative interactions between pairmates and agonistic responses to strangers. In natural settings, separation between mates can vary from brief periods, as when mates drift apart during feeding, to permanent separation, occasioned by desertion or death. In this study we asked how different durations of separation altered the behavior of male and fema…
Effects of duration of separation on responses to mates and strangers in the monogamous titi monkey (Callicebus moloch)
Adult male and female titi monkeys form an intense social bond characterized by high levels of affiliative interactions between pairmates and agonistic responses to strangers. In natural settings, separation between mates can vary from brief periods, as when mates drift apart during feeding, to permanent separation, occasioned by desertion or death. In this study we asked how different durations of separation altered the behavior of male and fema…
Individual differences in peripheral blood immunological and hormonal measures in adult male rhesus macaques (Macaca mulatta)
A growing body of research has indicated that consistent individual differences exist in physiological systems with which the immune system interacts. Few data have been reported that demonstrate stable individual differences in immunological measures, however. In the present study, enumerative measures of immune system activity were examined in 36 adult male rhesus macaques over a 13 month period under baseline conditions as well as under condit…
Reproductive biology of female titi monkeys (Callicebus moloch) in captivity
Titi monkeys (Callicebus spp., Cebidae) are monogamous neotropical primates that live in family-like groups typically consisting of an adult monogamous pair and one or two young. Knowledge about the reproductive biology of this genus is scanty. This study investigated the reproductive biology of female dusky titi monkeys (Callicebus moloch). An initial analysis characterized reproductive parameters of 32 females from a captive colony maintained f…
Annual physiological changes in individually housed squirrel monkeys (Saimiri sciureus)
This study investigated whether annual changes in physiology occur in individually housed squirrel monkeys (Saimiri sciureus). Physiological measures were monitored for 20 months. Over the course of the study, all individually housed males and females exhibited clear annual changes in gonadal and adrenal hormone levels, and males exhibited species-typical changes in body weight. Females exhibited a typical pattern of hormonal changes, with elevat…
The beginning of an alternative view of the neurobiology of emotion
This article attempts to provide a sketch of the neurobiology of emotion that includes essential aspects of emotion as identified by personality and social psychologists. We offer a model of emotion that includes a negative valence system with the amygdala at its core and a positive evaluation system with the nucleus accumbens at its core. The apparent specificity of emotion is conferred by the additional contribution of two monoaminergic systems…
Developmental changes in responsiveness to parents and unfamiliar adults in a monogamous monkey ( Callicebus moloch )
Titi monkeys ( Callicebus moloch ) are monogamous New World primates that are characteristically found in family‐type groups consisting of a mated adult pair and one or two young. The factors maintaining the small size of these groups are not known. Based on observations of free‐ranging and captive families, parental aggression toward older offspring seems unlikely to play a significant role. Maturing individuals themselves, however, could underg…
Excretion and measurement of estradiol and progesterone metabolites in the feces and urine of female squirrel monkeys ( Saimiri sciureus )
The first objective of the present study was to determine the metabolic form and rate of excretion of ovarian hormone metabolites in the urine and feces of female squirrel monkeys injected with radiolabeled progesterone (Po) and estradiol. The major portion of the urinary metabolites of both hormones was excreted within 16–24 hr post‐injection. Estrogen and Po isotopes in feces exhibited an excretion peak at 16 hr post‐injection. The majority of …
Are subordinates always stressed? a comparative analysis of rank differences in cortisol levels among primates
Personality influences tetanus‐specific antibody response in adult male rhesus macaques after removal from natal group and housing relocation
Previous research has suggested that personality is related to immune function in macaques. Using a prospective design, we examined whether variation in the personality dimension “Sociability” in adult male rhesus macaques ( Macaca mulatta ) was related to the in vivo secondary antibody response to a tetanus toxoid booster immunization following removal from natal groups and relocation to individual housing. We also explored whether the timing of…
Nature of proximate mechanisms underlying primate social systems
Given the complexity of primate so-cial systems, it is not surprising that the search for proximate mechanisms is a daunting task. We have long known that the types of social groups that primates form and maintain are characteristic of a given species.1 It is also clear that social systems emerge from interactions between individu-als.2 Understanding proximate mech-anisms contributing to social systems, therefore, requires a focus on the ten-denc…
Amygdalectomy and responsiveness to novelty in rhesus monkeys (Macaca mulatta)
Rhesus monkeys (Macaca mulatta) with bilateral ibotenic acid-produced lesions of the amygdala were compared with controls in several novel situations, including exposures to metal objects, toy animals, and a person. Early in testing, the monkeys with lesions showed reduced inhibitions on responsiveness compared with controls. With continuing exposures, differences between groups diminished sharply as inhibitions waned in the controls. This outcom…
Social Stress Desensitizes Lymphocytes to Regulation by Endogenous Glucocorticoids
OBJECTIVE: To determine whether chronic social stress can desensitize leukocytes to normal physiologic regulation by endogenous glucocorticoids. METHODS: We analyzed the longitudinal relationship between plasma cortisol levels and peripheral blood lymphocyte counts over 16 monthly assessments in 18 rhesus macaques randomized to recurrent social encounters with a stable set of conspecifics or continually varying social partners (unstable socializa…
The Biology of Paternal Care in Human and Nonhuman Primates
Among primates, intense paternal care is manifested in only a few distantly related species, including humans. Thus, neither purely phylogenetic nor socioecological hypotheses can explain its presence or the variability in the expression of paternal behaviors. Traditional theoretical models for the evolution of paternal care can now be reexamined, focusing on male-female interactions as a possible key to understanding parental strategies. At a pr…
Behavioral Inhibition Is Associated With Airway Hyperresponsiveness but not Atopy in a Monkey Model of Asthma
OBJECTIVE: To determine whether indicators of behavioral inhibition and cortisol responses to stressful situations, obtained in infancy, were associated with asthma-related measures (atopy and airway hyperresponsiveness [AHR]) approximately 2 years later. METHODS: Measures reflecting inhibited temperament and cortisol response after a 25-hour separation from mother and relocation to a novel room were obtained for 21 rhesus monkeys (mean age, 109 …
Differences in Titi Monkey ( Callicebus cupreus ) Social Bonds Affect Arousal, Affiliation, and Response to Reward
Titi monkeys ( Callicebus cupreus ) are a monogamous, New World primate. Adult pair‐mates form a bidirectional social bond and offspring form a selective unidirectional bond to their father. Some of the neurobiology involved in social bonds and maternal behavior is similar to the neural circuitry involved in nonsocial reward. Due to these overlapping mechanisms, social states may affect responses to external rewarding stimuli. We sought to determ…
Hormonal and Experiential Predictors of Infant Survivorship and Maternal Behavior in a Monogamous Primate ( C allicebus cupreus )
To better understand the roles that hormones and experience play in infant survival and maternal behavior in a biparental primate species, we analyzed urinary estrone ( E 1 C ) and pregnanediol glucuronide ( PdG ) from 24 socially housed titi monkey ( C allicebus cupreus) females over 54 pregnancies ( N = 1,430 samples). Pregnancies were categorized according to whether the infant survived ( N = 35) or not ( N = 19), and by maternal parity (primi…
Biology (25 works) · Psychology (23 works) · Primate Behavior and Ecology (22 works) · Neuroendocrine regulation and behavior (18 works) · Developmental psychology (15 works) · Zoology (15 works) · Primate (14 works) · Neuroscience (11 works) · Social Psychology (11 works) · Animal Behavior and Reproduction (10 works)