Katharine M Jack
Biographic Data
| ID | 102138 |
|---|---|
| NAME | Katharine M Jack |
| GIVEN NAMES | Katharine M |
| FAMILY NAME | Jack |
| SIGNATURE | JACK K M |
| AFFILIATIONS | Tulane University |
| ORCID | 0000-0003-3569-8544 |
| VERIFIED | Yes |
| TOTAL WORKS | 27 |
| TOTAL CITATIONS | 63 |
| AUTHOR COUNT | 27 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 1997 |
| LATEST PUBLICATION YEAR | 2026 |
| H-INDEX | 4 |
MHC-DRB heterozygosity may increase subordinate but not alpha male siring success in white-faced capuchin monkeys (Cebus imitator)
Sources of Variation in Fecal Haptoglobin in a Population of Wild Capuchin Monkeys ( Cebus imitator )
The ongoing decline of non‐human primates places renewed emphasis on monitoring health in wild populations. Non‐invasive monitoring of reliable biomarkers of inflammation and immune activation allows researchers to assess individual health status without capturing or interfering with wild animals, but studies are limited by the availability of such biomarkers that are measurable from fecal and urine samples. In the present study, we aimed to vali…
Temperature and Rainfall Associate With Patterns of Parasitism in Free‐Ranging Capuchin Monkeys ( Cebus imitator )
Ecological variables such as climate and habitat composition can impact the infection patterns of gastrointestinal parasites in animal host populations by affecting host behavior and parasite survivability and distribution in the external environment. Data from wild primate populations provide insights into these processes. To contribute new insights from a well‐characterized population, we collected 200 fecal samples from five groups of Costa Ri…
And Baby Makes Three
In group‐living primates, male investment in infants is highly variable. Previous research on polygynandrous primates found that male care of infants, whether direct or indirect, may be a means to increase offspring survival, increase social status, invest in future mating opportunities, and/or invest in future social or coalition partners, any of which may increase fitness outcomes. Relationships between male white‐faced capuchins ( Cebus imitat…
Gastrointestinal Parasites in Wild Capuchins (Cebus imitator)
Primate field research during a pandemic
The COVID‐19 pandemic abruptly halted most primate field research in early 2020. While international travel bans and regional travel restrictions made continuing primate field research impossible early on in the pandemic, ethical concerns of transmitting the virus from researchers to primates and surrounding human communities informed decisions regarding the timing of resuming research. Between June and September 2020, we surveyed field primatolo…
Female-committed infanticide followed by juvenile-enacted cannibalism in wild white-faced capuchins
On 5 February 2021, we observed the first instance of female-committed infanticide followed by cannibalism in a long-studied (> 35 years) population of wild white-faced capuchins (Cebus imitator) in the Santa Rosa Sector of the Área de Conservación Guanacaste, Costa Rica. The events leading up to and including the infanticide and cannibalism were observed and documented ad libitum, with segments digitally recorded, and a post-mortem necropsy perf…
Costs of male infanticide for female capuchins
OBJECTIVES: Infanticide in white-faced capuchins (Cebus capucinus imitator) typically occurs in association with alpha male replacements (AMRs). Although infanticide is likely adaptive for males, it imposes costs on females that are difficult to quantify without long-term demographic data. Here we investigate effects of AMRs and infanticide on female reproductive success and how these costs affect capuchin groups. We investigate (1) effects of AM…
Group versus population level demographics
Primates have long been used as indicator species for assessing overall ecosystem health. However, area‐wide census methods are time consuming, costly, and not always feasible under many field conditions. Therefore, it is important to establish whether monitoring a subset of a population accurately reflects demographic changes occurring in the population at large. Over the past 35 years, we have conducted 15 area‐wide censuses in Sector Santa Ros…
Alpha male replacements in nonhuman primates
Alpha male replacements occur in all primates displaying a dominance hierarchy but the process can be extremely variable. Here, we review the primate literature to document differences in patterns of alpha male replacements, showing that group composition and dispersal patterns account for a large proportion of this variability. We also examine the consequences of alpha male replacements in terms of sexual selection theory, infanticide, and group…
Infant mortality in white‐faced capuchins
Infanticide is common in the context of alpha male replacements (AMR), particularly in groups where alpha males experience high reproductive skew and the infants are unlikely to be related to a new alpha male. We examined the relationship between the rate of infant mortality, infant age, and the occurrence and type of AMR in white-faced capuchin monkeys (Cebus capucinus imitator) of the Santa Rosa population in Sector Santa Rosa, Área de Conserva…
How to cultivate a tree
Paternal kin recognition and infant care in white‐faced capuchins ( Cebus capucinus )
Evidence for paternal kin recognition and paternally biased behaviors is mixed among primates. We investigate whether infant handling behaviors exhibit paternal kin biases in wild white-faced capuchins monkeys (Cebus capucinus) by comparing interactions between infants and genetic sires, potential sires, siblings (full sibling, maternal, and paternal half-siblings) and unrelated handlers. We used a linear mixed model approach to analyze data coll…
Male endocrine response to seasonally varying environmental and social factors in a neotropical primate, Cebus capucinus
OBJECTIVE: Circannual variation in reproduction is pervasive in birds and mammals. In primates, breeding seasonality is variable, with seasonal birth peaks occurring even in year-round breeders. Environmental seasonality is reportedly an important contributor to the observed variation in reproductive seasonality. Given that food availability is the primary factor constraining female reproduction, predictions concerning responsiveness to environme…
Male Response to Female Ovulation in White-Faced Capuchins (Cebus capucinus)
Edge effects in the primate community of the biological dynamics of forest fragments project, A mazonas, B razil
While much is known about abiotic and vegetative edge effects in tropical forests, considerably less is known about the impact of forest edges on large mammals. In this study, we examine edge effects in a primate community to determine: 1) the distance from the edge over which edge effects in primate density are detectable, 2) whether individual species exhibit edge effects in their density, and 3) whether biological characteristics can be used t…
The Association of Intergroup Encounters, Dominance Status, and Fecal Androgen and Glucocorticoid Profiles in Wild Male White‐Faced Capuchins ( Cebus capucinus )
Androgens play a role in male reproductive competition, frequently via aggression, while glucocorticoids are associated with the stress response. However, the relationships of these hormones with different sources of competition (intra‐ vs. intergroup) and dominance status are highly variable. Here, we consider the fecal androgen (f A ) and glucocorticoid (f GC ) profiles of alpha and subordinate male C ebus capucinus in the context of intergroup…
A Potential Distribution Model and Conservation Plan for the Critically Endangered Ecuadorian Capuchin, Cebus albifrons aequatorialis
Social factors influencing natal dispersal in male white‐faced capuchins ( Cebus capucinus )
White‐faced capuchin males disperse from their natal group at around 4.5 years of age, but there is much variation in dispersal timing: our youngest confirmed disperser was 19 months and the oldest 11 years old. In this study, we investigate possible factors influencing dispersal decisions in this species. Between 1983 and 2010, 64 males were born into three study groups in Santa Rosa National Park, Area de Conservación Guanacaste, and Costa Rica…
Two girls for every boy
Many factors have been hypothesized to affect the size and adult sex ratios of primate groups and these, in turn, have been argued to influence birth rates. Using park‐wide census data collected on a population of capuchins over a 25‐year period, we examined whether group size and adult sex ratio affect the per capita reproductive success of male and female white‐faced capuchins ( Cebus capucinus ) in Santa Rosa National Park, Costa Rica. We foun…
The effects of infant births on male–female relationships in Cebus capucinus
Most primates are characterized by cohesive male–female bonds that are maintained year round. While recent studies have addressed the selective pressures influencing the evolution of male–female relationships in primates, we know relatively little about the proximate mechanisms affecting them. It has been demonstrated that newborn white‐faced capuchins ( Cebus capucinus ) attract the attention of other group members and this may be an important m…
The effects of observer presence on the behavior of Cebus capucinus in Costa Rica
We report on the responses of Cebus capucinus in the Santa Rosa Sector of the Area de Conservación Guanacaste, Costa Rica, to the presence of observers over a 4‐week period. Study groups were habituated to different degrees: (1) Cerco de Piedra (CP): continuous observations began in 1984; (2) Exclosure (EX): focus of an 18‐month study on males from 1998 to 1999; and (3) NBH: never studied/followed but the group frequently encounters researchers. …
Predictors of reproductive success in female white‐faced capuchins ( Cebus capucinus )
Early investigations into variable reproductive success in nonhuman primates tended to focus on the benefits conferred by high dominance rank. However, the effect of high rank on individual reproductive success has been found to vary both intra‐ and interspecifically, requiring researchers to expand their investigations to include additional factors. Here we examine the age and rank of the mother, sex of the infant, group size, number of close ki…
Interspecific Interactions Between Cebus capucinus and Other Species
Effect of Male Emigration on the Vigilance Behavior of Coresident Males in White-Faced Capuchins (Cebus capucinus)
Neotropical Primates in a Regenerating Costa Rican Dry Forest
Interspecific Interactions Between Cebus capucinus and Other Species
Predictors of reproductive success in female white‐faced capuchins ( Cebus capucinus )
Early investigations into variable reproductive success in nonhuman primates tended to focus on the benefits conferred by high dominance rank. However, the effect of high rank on individual reproductive success has been found to vary both intra‐ and interspecifically, requiring researchers to expand their investigations to include additional factors. Here we examine the age and rank of the mother, sex of the infant, group size, number of close ki…
Male Response to Female Ovulation in White-Faced Capuchins (Cebus capucinus)
Edge effects in the primate community of the biological dynamics of forest fragments project, A mazonas, B razil
While much is known about abiotic and vegetative edge effects in tropical forests, considerably less is known about the impact of forest edges on large mammals. In this study, we examine edge effects in a primate community to determine: 1) the distance from the edge over which edge effects in primate density are detectable, 2) whether individual species exhibit edge effects in their density, and 3) whether biological characteristics can be used t…
A Potential Distribution Model and Conservation Plan for the Critically Endangered Ecuadorian Capuchin, Cebus albifrons aequatorialis
Male endocrine response to seasonally varying environmental and social factors in a neotropical primate, Cebus capucinus
OBJECTIVE: Circannual variation in reproduction is pervasive in birds and mammals. In primates, breeding seasonality is variable, with seasonal birth peaks occurring even in year-round breeders. Environmental seasonality is reportedly an important contributor to the observed variation in reproductive seasonality. Given that food availability is the primary factor constraining female reproduction, predictions concerning responsiveness to environme…
Two girls for every boy
Many factors have been hypothesized to affect the size and adult sex ratios of primate groups and these, in turn, have been argued to influence birth rates. Using park‐wide census data collected on a population of capuchins over a 25‐year period, we examined whether group size and adult sex ratio affect the per capita reproductive success of male and female white‐faced capuchins ( Cebus capucinus ) in Santa Rosa National Park, Costa Rica. We foun…
Effect of Male Emigration on the Vigilance Behavior of Coresident Males in White-Faced Capuchins (Cebus capucinus)
How to cultivate a tree
The behavior of peripheral males during the mating season inMacaca fuscata
Effect of Male Emigration on the Vigilance Behavior of Coresident Males in White-Faced Capuchins (Cebus capucinus)
Neotropical Primates in a Regenerating Costa Rican Dry Forest
Interspecific Interactions Between Cebus capucinus and Other Species
The effects of observer presence on the behavior of Cebus capucinus in Costa Rica
We report on the responses of Cebus capucinus in the Santa Rosa Sector of the Area de Conservación Guanacaste, Costa Rica, to the presence of observers over a 4‐week period. Study groups were habituated to different degrees: (1) Cerco de Piedra (CP): continuous observations began in 1984; (2) Exclosure (EX): focus of an 18‐month study on males from 1998 to 1999; and (3) NBH: never studied/followed but the group frequently encounters researchers. …
Predictors of reproductive success in female white‐faced capuchins ( Cebus capucinus )
Early investigations into variable reproductive success in nonhuman primates tended to focus on the benefits conferred by high dominance rank. However, the effect of high rank on individual reproductive success has been found to vary both intra‐ and interspecifically, requiring researchers to expand their investigations to include additional factors. Here we examine the age and rank of the mother, sex of the infant, group size, number of close ki…
The effects of infant births on male–female relationships in Cebus capucinus
Most primates are characterized by cohesive male–female bonds that are maintained year round. While recent studies have addressed the selective pressures influencing the evolution of male–female relationships in primates, we know relatively little about the proximate mechanisms affecting them. It has been demonstrated that newborn white‐faced capuchins ( Cebus capucinus ) attract the attention of other group members and this may be an important m…
Two girls for every boy
Many factors have been hypothesized to affect the size and adult sex ratios of primate groups and these, in turn, have been argued to influence birth rates. Using park‐wide census data collected on a population of capuchins over a 25‐year period, we examined whether group size and adult sex ratio affect the per capita reproductive success of male and female white‐faced capuchins ( Cebus capucinus ) in Santa Rosa National Park, Costa Rica. We foun…
Social factors influencing natal dispersal in male white‐faced capuchins ( Cebus capucinus )
White‐faced capuchin males disperse from their natal group at around 4.5 years of age, but there is much variation in dispersal timing: our youngest confirmed disperser was 19 months and the oldest 11 years old. In this study, we investigate possible factors influencing dispersal decisions in this species. Between 1983 and 2010, 64 males were born into three study groups in Santa Rosa National Park, Area de Conservación Guanacaste, and Costa Rica…
The Association of Intergroup Encounters, Dominance Status, and Fecal Androgen and Glucocorticoid Profiles in Wild Male White‐Faced Capuchins ( Cebus capucinus )
Androgens play a role in male reproductive competition, frequently via aggression, while glucocorticoids are associated with the stress response. However, the relationships of these hormones with different sources of competition (intra‐ vs. intergroup) and dominance status are highly variable. Here, we consider the fecal androgen (f A ) and glucocorticoid (f GC ) profiles of alpha and subordinate male C ebus capucinus in the context of intergroup…
A Potential Distribution Model and Conservation Plan for the Critically Endangered Ecuadorian Capuchin, Cebus albifrons aequatorialis
Male Response to Female Ovulation in White-Faced Capuchins (Cebus capucinus)
Edge effects in the primate community of the biological dynamics of forest fragments project, A mazonas, B razil
While much is known about abiotic and vegetative edge effects in tropical forests, considerably less is known about the impact of forest edges on large mammals. In this study, we examine edge effects in a primate community to determine: 1) the distance from the edge over which edge effects in primate density are detectable, 2) whether individual species exhibit edge effects in their density, and 3) whether biological characteristics can be used t…
Paternal kin recognition and infant care in white‐faced capuchins ( Cebus capucinus )
Evidence for paternal kin recognition and paternally biased behaviors is mixed among primates. We investigate whether infant handling behaviors exhibit paternal kin biases in wild white-faced capuchins monkeys (Cebus capucinus) by comparing interactions between infants and genetic sires, potential sires, siblings (full sibling, maternal, and paternal half-siblings) and unrelated handlers. We used a linear mixed model approach to analyze data coll…
Male endocrine response to seasonally varying environmental and social factors in a neotropical primate, Cebus capucinus
OBJECTIVE: Circannual variation in reproduction is pervasive in birds and mammals. In primates, breeding seasonality is variable, with seasonal birth peaks occurring even in year-round breeders. Environmental seasonality is reportedly an important contributor to the observed variation in reproductive seasonality. Given that food availability is the primary factor constraining female reproduction, predictions concerning responsiveness to environme…
Alpha male replacements in nonhuman primates
Alpha male replacements occur in all primates displaying a dominance hierarchy but the process can be extremely variable. Here, we review the primate literature to document differences in patterns of alpha male replacements, showing that group composition and dispersal patterns account for a large proportion of this variability. We also examine the consequences of alpha male replacements in terms of sexual selection theory, infanticide, and group…
Infant mortality in white‐faced capuchins
Infanticide is common in the context of alpha male replacements (AMR), particularly in groups where alpha males experience high reproductive skew and the infants are unlikely to be related to a new alpha male. We examined the relationship between the rate of infant mortality, infant age, and the occurrence and type of AMR in white-faced capuchin monkeys (Cebus capucinus imitator) of the Santa Rosa population in Sector Santa Rosa, Área de Conserva…
How to cultivate a tree
Group versus population level demographics
Primates have long been used as indicator species for assessing overall ecosystem health. However, area‐wide census methods are time consuming, costly, and not always feasible under many field conditions. Therefore, it is important to establish whether monitoring a subset of a population accurately reflects demographic changes occurring in the population at large. Over the past 35 years, we have conducted 15 area‐wide censuses in Sector Santa Ros…
Female-committed infanticide followed by juvenile-enacted cannibalism in wild white-faced capuchins
On 5 February 2021, we observed the first instance of female-committed infanticide followed by cannibalism in a long-studied (> 35 years) population of wild white-faced capuchins (Cebus imitator) in the Santa Rosa Sector of the Área de Conservación Guanacaste, Costa Rica. The events leading up to and including the infanticide and cannibalism were observed and documented ad libitum, with segments digitally recorded, and a post-mortem necropsy perf…
Costs of male infanticide for female capuchins
OBJECTIVES: Infanticide in white-faced capuchins (Cebus capucinus imitator) typically occurs in association with alpha male replacements (AMRs). Although infanticide is likely adaptive for males, it imposes costs on females that are difficult to quantify without long-term demographic data. Here we investigate effects of AMRs and infanticide on female reproductive success and how these costs affect capuchin groups. We investigate (1) effects of AM…
Primate field research during a pandemic
The COVID‐19 pandemic abruptly halted most primate field research in early 2020. While international travel bans and regional travel restrictions made continuing primate field research impossible early on in the pandemic, ethical concerns of transmitting the virus from researchers to primates and surrounding human communities informed decisions regarding the timing of resuming research. Between June and September 2020, we surveyed field primatolo…
And Baby Makes Three
In group‐living primates, male investment in infants is highly variable. Previous research on polygynandrous primates found that male care of infants, whether direct or indirect, may be a means to increase offspring survival, increase social status, invest in future mating opportunities, and/or invest in future social or coalition partners, any of which may increase fitness outcomes. Relationships between male white‐faced capuchins ( Cebus imitat…
Gastrointestinal Parasites in Wild Capuchins (Cebus imitator)
MHC-DRB heterozygosity may increase subordinate but not alpha male siring success in white-faced capuchin monkeys (Cebus imitator)
Primate Behavior and Ecology (26 works) · Biology (24 works) · Demography (15 works) · Animal Behavior and Reproduction (12 works) · Population (12 works) · Ecology (11 works) · Psychology (11 works) · Animal ecology (9 works) · Zoology (9 works) · Wildlife Ecology and Conservation (8 works)