Margaret R Clarke
Biographic Data
| ID | 5179376 |
|---|---|
| NAME | Margaret R Clarke |
| GIVEN NAMES | Margaret R |
| FAMILY NAME | Clarke |
| SIGNATURE | CLARKE M R |
| AFFILIATIONS | Tulane University |
| VERIFIED | No |
| TOTAL WORKS | 22 |
| TOTAL CITATIONS | 47 |
| AUTHOR COUNT | 22 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 1978 |
| LATEST PUBLICATION YEAR | 2010 |
| H-INDEX | 4 |
Secondary transfer of adult mantled howlers (Alouatta palliata) on Hacienda La Pacifica, Costa Rica
Natal emigration by both sexes in the La Pacifica population of mantled howlers
We have reported previously that all male and female mantled howlers emigrate from natal groups at Hacienda La Pacifica, Costa Rica. In the years since that report, a small number of juveniles have stayed in the natal group without experiencing a solitary phase. Here, we present a post hoc analysis on juvenile emigration in six groups of howlers under observation for varying amounts of time between 1972 and 2005. Our records revealed 139 juvenile…
Behavior and endocrine concentrations do not distinguish sex in monomorphic juvenile howlers ( Alouatta palliata )
Behavioral observations on juvenile mantled howlers are limited by visually undifferentiated genitalia; however, animals can be sexed when they are very young or if they are captured. Behavioral data and fecal samples from juveniles during month‐long field studies from 1993 to 1995 were analyzed to determine whether there are developmental differences in behavior or hormone concentrations that can be used to differentiate males from females. The …
Longitudinal Assessment of Immature-to-Adult Ratios in Two Groups of Costa Rican Alouatta palliata
Mantled howler population of Hacienda La Pacifica, Costa Rica, between 1991 and 1998
A survey of the mantled howler ( Alouatta palliata ) population on Hacienda La Pacifica, Guanacaste, Costa Rica, was done in July and August of 1998 to determine population parameters following deforestation due to major canal construction between 1990 and 1994. The survey was carried out in a manner identical to our 1991 survey and consisted of a single pass and two re‐surveys of all forested areas of the farm. As canal construction effectively …
Responses to Deforestation in a Group of Mantled Howlers (Alouatta palliata) in Costa Rica
Morphometric comparison of Chinese-origin and Indian-derived rhesus monkeys (Macaca mulatta)
Chinese-origin and Indian-derived rhesus monkeys (Macaca mulatta), ranging in age from 6 months to 15 years, were weighed and measured during the 1995 inventory of the SAIDS breeding colony at the Tulane Regional Primate Research Center. Data were analyzed separately for males (n=279) and females (n=554), and an analysis of variance was done for five measurements and two indices, with age and country of origin as independent variables. All measur…
Demonic males
Demonic males
Infant–Nonmother Interactions of Free-Ranging Mantled Howlers (Alouatta palliata) in Costa Rica
Agonistic and Affiliative Relationships of Adult Female Howlers (Alouatta palliata) in Costa Rica Over a 4-Year Period
Behavioral, immunological, and hormonal responses associated with social change in rhesus monkeys (Macaca mulatta)
Twelve animals to be socially reorganized in a group of 49 animals were compared with ten animals in a socially stable group (n = 51) for reproductive hormones, cortisol concentrations, immune function, and behavioral patterns for a 6 week baseline and 16 week postreorganization period. Cortisol values, mitogen-induced lymphocyte blastogenesis, and rates of behavior reflected social events. Increased cortisols, increased noncontact aggression, an…
Obituary of Elizabeth S. Watts
Group takeover by a natal male howling monkey (Alouatta palliata) and associated disappearance and injuries of immatures
Survey of the howling monkey population at La Pacifica
Survey of parasites of rhesus monkeys housed in small social groups
A survey of specific parasites in fecal samples randomly collected from socially housed rhesus monkeys was done over a 1‐year period. Differences in frequency of samples with parasites, and number of different species per sample, were assessed by social group composition, social group size, female reproductive status, and season of the year. Common parasites were Entamoeba coli, Iodamoeba bütschlii, Balantidium coli, Strongyloides fülleborni , an…
Aggressive and affiliative behavior in green monkeys with differing housing complexity
Eleven green monkeys (Cercopithecus aethiops) were combined into three social groups (two heterosexual, one all-male) in enclosures with similar volume but different levels of environmental complexity (two or four compartments). Agonistic and affiliative interactions were recorded over a 21-week period. The two heterosexual groups had their environmental complexity reduced (number of compartments reduced by one-half and volume/floorspace reduced …
Biological Anthropology
Population trends of the mantled howler groups of La Pacifica, Guanacaste, Costa Rica
A complete survey of La Pacifica in Guanacaste Province, Costa Rica was conducted in July 1984 in order to determine whether the howler ( Alouatta palliata ) population had declined since 1972 as a result of deforestation. During the 6‐day survey, 257 howlers were located, representing 16 different social groupings and nine solitary animals. The total number of howlers, the number and location of groups, and the age‐sex composition were very simi…
Brief report
Events surrounding an infant‐killing following a male takeover are described for a group of free‐ranging howling monkeys in Costa Rica, and additional evidence is presented for infant disappearances following three previous male takeovers. Infant‐killing is best interpreted in this context as a male reproductive strategy, as infant‐killing did effectively shorten the interbirth interval, and only infants of high‐ranking females died or disappeare…
Adoption of infant howling monkeys ( Alouatta palliata )
During 3 years of continuous field observations on mantled howlers ( Alouatta palliata Gray) in Costa Rica we observed five infants without mothers in the main study group. Four of these infants solicited care and two were adopted (one permanently, one temporarily) by lactating females. The other two were carried but not adopted. The fifth neither solicited nor received care. An infant must solicit care to receive care, and female howlers apparen…
Social interactions of juvenile female bonnet monkeys,Macaca radiata
Responses to Deforestation in a Group of Mantled Howlers (Alouatta palliata) in Costa Rica
Agonistic and Affiliative Relationships of Adult Female Howlers (Alouatta palliata) in Costa Rica Over a 4-Year Period
Infant–Nonmother Interactions of Free-Ranging Mantled Howlers (Alouatta palliata) in Costa Rica
Survey of the howling monkey population at La Pacifica
Longitudinal Assessment of Immature-to-Adult Ratios in Two Groups of Costa Rican Alouatta palliata
Social interactions of juvenile female bonnet monkeys,Macaca radiata
Adoption of infant howling monkeys ( Alouatta palliata )
During 3 years of continuous field observations on mantled howlers ( Alouatta palliata Gray) in Costa Rica we observed five infants without mothers in the main study group. Four of these infants solicited care and two were adopted (one permanently, one temporarily) by lactating females. The other two were carried but not adopted. The fifth neither solicited nor received care. An infant must solicit care to receive care, and female howlers apparen…
Brief report
Events surrounding an infant‐killing following a male takeover are described for a group of free‐ranging howling monkeys in Costa Rica, and additional evidence is presented for infant disappearances following three previous male takeovers. Infant‐killing is best interpreted in this context as a male reproductive strategy, as infant‐killing did effectively shorten the interbirth interval, and only infants of high‐ranking females died or disappeare…
Population trends of the mantled howler groups of La Pacifica, Guanacaste, Costa Rica
A complete survey of La Pacifica in Guanacaste Province, Costa Rica was conducted in July 1984 in order to determine whether the howler ( Alouatta palliata ) population had declined since 1972 as a result of deforestation. During the 6‐day survey, 257 howlers were located, representing 16 different social groupings and nine solitary animals. The total number of howlers, the number and location of groups, and the age‐sex composition were very simi…
Biological Anthropology
Survey of parasites of rhesus monkeys housed in small social groups
A survey of specific parasites in fecal samples randomly collected from socially housed rhesus monkeys was done over a 1‐year period. Differences in frequency of samples with parasites, and number of different species per sample, were assessed by social group composition, social group size, female reproductive status, and season of the year. Common parasites were Entamoeba coli, Iodamoeba bütschlii, Balantidium coli, Strongyloides fülleborni , an…
Aggressive and affiliative behavior in green monkeys with differing housing complexity
Eleven green monkeys (Cercopithecus aethiops) were combined into three social groups (two heterosexual, one all-male) in enclosures with similar volume but different levels of environmental complexity (two or four compartments). Agonistic and affiliative interactions were recorded over a 21-week period. The two heterosexual groups had their environmental complexity reduced (number of compartments reduced by one-half and volume/floorspace reduced …
Group takeover by a natal male howling monkey (Alouatta palliata) and associated disappearance and injuries of immatures
Survey of the howling monkey population at La Pacifica
Obituary of Elizabeth S. Watts
Behavioral, immunological, and hormonal responses associated with social change in rhesus monkeys (Macaca mulatta)
Twelve animals to be socially reorganized in a group of 49 animals were compared with ten animals in a socially stable group (n = 51) for reproductive hormones, cortisol concentrations, immune function, and behavioral patterns for a 6 week baseline and 16 week postreorganization period. Cortisol values, mitogen-induced lymphocyte blastogenesis, and rates of behavior reflected social events. Increased cortisols, increased noncontact aggression, an…
Infant–Nonmother Interactions of Free-Ranging Mantled Howlers (Alouatta palliata) in Costa Rica
Agonistic and Affiliative Relationships of Adult Female Howlers (Alouatta palliata) in Costa Rica Over a 4-Year Period
Morphometric comparison of Chinese-origin and Indian-derived rhesus monkeys (Macaca mulatta)
Chinese-origin and Indian-derived rhesus monkeys (Macaca mulatta), ranging in age from 6 months to 15 years, were weighed and measured during the 1995 inventory of the SAIDS breeding colony at the Tulane Regional Primate Research Center. Data were analyzed separately for males (n=279) and females (n=554), and an analysis of variance was done for five measurements and two indices, with age and country of origin as independent variables. All measur…
Demonic males
Demonic males
Mantled howler population of Hacienda La Pacifica, Costa Rica, between 1991 and 1998
A survey of the mantled howler ( Alouatta palliata ) population on Hacienda La Pacifica, Guanacaste, Costa Rica, was done in July and August of 1998 to determine population parameters following deforestation due to major canal construction between 1990 and 1994. The survey was carried out in a manner identical to our 1991 survey and consisted of a single pass and two re‐surveys of all forested areas of the farm. As canal construction effectively …
Responses to Deforestation in a Group of Mantled Howlers (Alouatta palliata) in Costa Rica
Longitudinal Assessment of Immature-to-Adult Ratios in Two Groups of Costa Rican Alouatta palliata
Behavior and endocrine concentrations do not distinguish sex in monomorphic juvenile howlers ( Alouatta palliata )
Behavioral observations on juvenile mantled howlers are limited by visually undifferentiated genitalia; however, animals can be sexed when they are very young or if they are captured. Behavioral data and fecal samples from juveniles during month‐long field studies from 1993 to 1995 were analyzed to determine whether there are developmental differences in behavior or hormone concentrations that can be used to differentiate males from females. The …
Natal emigration by both sexes in the La Pacifica population of mantled howlers
We have reported previously that all male and female mantled howlers emigrate from natal groups at Hacienda La Pacifica, Costa Rica. In the years since that report, a small number of juveniles have stayed in the natal group without experiencing a solitary phase. Here, we present a post hoc analysis on juvenile emigration in six groups of howlers under observation for varying amounts of time between 1972 and 2005. Our records revealed 139 juvenile…
Secondary transfer of adult mantled howlers (Alouatta palliata) on Hacienda La Pacifica, Costa Rica
Primate Behavior and Ecology (18 works) · Biology (17 works) · Demography (15 works) · Animal Vocal Communication and Behavior (11 works) · Animal Behavior and Reproduction (9 works) · Ecology (9 works) · Geography (9 works) · Animal ecology (8 works) · Wildlife Ecology and Conservation (8 works) · Juvenile (7 works)