Amy L Schreier
Biographic Data
| ID | 5204928 |
|---|---|
| NAME | Amy L Schreier |
| GIVEN NAMES | Amy L |
| FAMILY NAME | Schreier |
| SIGNATURE | SCHREIER A L |
| AFFILIATIONS | Regis University |
| ORCID | 0000-0002-0379-3750 |
| VERIFIED | Yes |
| TOTAL WORKS | 19 |
| TOTAL CITATIONS | 42 |
| AUTHOR COUNT | 19 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 2008 |
| LATEST PUBLICATION YEAR | 2025 |
| H-INDEX | 3 |
Mantled howler monkeys (Alouatta palliata) alter activity and spatial cohesion across a continuous forest and forest fragment in Costa Rica
Edge effects and social behavior in three platyrrhines
Social behavior is a key adaptation for group‐living primates. It is important to assess changes to social behavior in human‐impacted landscape zones to better understand the impact of anthropogenic disturbance on primate species. We investigated social behavior rate and type in three species of platyrrhines across 100 m anthropogenic edge and interior zones of a fragmented forest in Costa Rica, La Suerte Biological Research Station (LSBRS). Foll…
The Mantled Howler Monkey (Alouatta palliata) Population at La Selva Research Station, Costa Rica: Comparing Censuses in 1992 and 2022
Student research collaboration as conservation education: A case study from the primate field school at Maderas Rainforest Conservancy
Maderas Rainforest Conservancy (MRC) is a conservation‐focused non‐profit organization that is devoted to protecting the tropical forests they manage in Costa Rica and Nicaragua and to providing conservation education for international university students through biological field schools. The MRC Primate Behavior and Ecology course is their most frequent course offering and is aimed at developing students to be independent field researchers. This…
Behavioral responses to riparian and anthropogenic edge effects in mantled howler monkeys (Alouatta palliata) in a disturbed riverine forest
Maderas Rainforest Conservancy: A One Health approach to conservation
Maderas Rainforest Conservancy (MRC) was incorporated as a conservation nonprofit organization in 2008, and manages two sites where biological field courses have been offered since the 1990s: La Suerte Biological Research Station in Costa Rica, and Ometepe Biological Research Station in Nicaragua. MRC employs a One Health approach to conservation education, and can serve as a model for other biological field sites. The Nicaraguan Molina family, w…
A Mathematical Modelling Approach to Functionally Defining Forest Edge and Its Utility for Primate Behavioural Edge Effects
Anthropogenic edges impact howler monkey (Alouatta palliata) feeding behaviour in a Costa Rican rainforest
Lone males: Solitary and group‐living male howler monkey ( Alouatta palliata ) behavioral ecology in a Costa Rican rainforest
OBJECTIVES: Many group-living primate species have evolved the capacity for some individuals to live alone for part of their lives, but this solitary life stage has rarely been the subject of focused research. The mantled howler monkey (Alouatta palliata) is a social primate species with bisexual dispersal that lives in mixed-sex groups with low male-to-female sex ratios. Consequently, males often spend a long period of their lives as solitary in…
Meat eating in wild hamadryas baboons: Opportunistic trade‐offs between insects and vertebrates
The consumption of meat may provide herbivorous animals with important nutrients that are scarce in their plant‐based diet. Seasonal variation in plant food availability has been suggested to motivate dietary flexibility in a range of species and thus primates may seek more prey when key plant resources are unavailable. Alternatively, prey encounter rate may drive meat eating. Here we investigate patterns of meat eating in hamadryas baboons ( Pap…
The influence of anthropogenic edge effects on primate populations and their habitat in a fragmented rainforest in Costa Rica
Testing parallel laser image scaling for remotely measuring body dimensions on mantled howling monkeys ( Alouatta palliata )
Body size is a fundamental variable for many studies in primate biology. However, obtaining body dimensions of wild primates through live capture is difficult and costly, so developing an alternative inexpensive and non-invasive method is crucial. Parallel laser image scaling for remotely measuring body size has been used with some success in marine and terrestrial animals, but only one arboreal primate. We further tested the efficacy of this met…
Recurrent patterning in the daily foraging routes of hamadryas baboons ( Papio hamadryas ): Spatial memory in large‐scale versus small‐scale space
The benefits of spatial memory for foraging animals can be assessed on two distinct spatial scales: small-scale space (travel within patches) and large-scale space (travel between patches). While the patches themselves may be distributed at low density, within patches resources are likely densely distributed. We propose, therefore, that spatial memory for recalling the particular locations of previously visited feeding sites will be more advantag…
The Socioecology of Network Scaling Ratios in the Multilevel Society of Hamadryas Baboons (Papio hamadryas hamadryas)
Ecology and sociality in a multilevel society: Ecological determinants of spatial cohesion in hamadryas baboons
The multilevel society of hamadryas baboons, consisting of troops, bands, clans, and one‐male units (OMUs), is commonly perceived to be an effective means of adapting to variable food availability while allowing spatial cohesion in response to predator pressure. The relationship between these variables, however, has never been tested quantitatively. The Filoha site in Awash National Park, Ethiopia is ideally suited to such an investigation as it …
Female “dispersal” in hamadryas baboons: Transfer among social units in a multilevel society
Unlike most cercopithecines, hamadryas baboons ( Papio hamadryas hamadryas ) are characterized by female‐biased dispersal. To clarify this pattern within the context of their hierarchical social system (comprising one‐male units, clans, bands, and troops), we report here 7 years of data on female transfers among social units in wild hamadryas baboons in Ethiopia. Female tenure in one‐male units (OMUs) ranged from 1 to 2,556 days ( N = 208) and su…
Male Aggression toward Females in Hamadryas Baboons: Conditioning,Coercion, and Control
The fourth level of social structure in a multi‐level society: Ecological and social functions of clans in hamadryas baboons
Hamadryas baboons are known for their complex, multi‐level social structure consisting of troops, bands, and one‐male units (OMUs) [Kummer, 1968. Social organization of hamadryas baboons. Chicago: The University of Chicago Press. 189p]. Abegglen [1984. On socialization in hamadryas baboons: a field study. Lewisburg, PA: Bucknell University Press. 207p.] observed a fourth level of social structure comprising several OMUs that rested near one anoth…
Use of palm trees as a sleeping site for hamadryas baboons ( Papio hamadryas hamadryas ) in Ethiopia
Hamadryas baboons sleep on cliffs throughout their range, and this can be attributed to the safety cliffs provide against predators in the absence of tall trees. In this paper, we report the first documented occurrence of hamadryas baboons sleeping in doum palm trees rather than on cliffs. Data derive from a study of hamadryas baboons at the Filoha site in lowland Ethiopia. During all‐day follows, data were collected on travel patterns, band acti…
Female “dispersal” in hamadryas baboons: Transfer among social units in a multilevel society
Unlike most cercopithecines, hamadryas baboons ( Papio hamadryas hamadryas ) are characterized by female‐biased dispersal. To clarify this pattern within the context of their hierarchical social system (comprising one‐male units, clans, bands, and troops), we report here 7 years of data on female transfers among social units in wild hamadryas baboons in Ethiopia. Female tenure in one‐male units (OMUs) ranged from 1 to 2,556 days ( N = 208) and su…
Ecology and sociality in a multilevel society: Ecological determinants of spatial cohesion in hamadryas baboons
The multilevel society of hamadryas baboons, consisting of troops, bands, clans, and one‐male units (OMUs), is commonly perceived to be an effective means of adapting to variable food availability while allowing spatial cohesion in response to predator pressure. The relationship between these variables, however, has never been tested quantitatively. The Filoha site in Awash National Park, Ethiopia is ideally suited to such an investigation as it …
The Socioecology of Network Scaling Ratios in the Multilevel Society of Hamadryas Baboons (Papio hamadryas hamadryas)
Lone males: Solitary and group‐living male howler monkey ( Alouatta palliata ) behavioral ecology in a Costa Rican rainforest
OBJECTIVES: Many group-living primate species have evolved the capacity for some individuals to live alone for part of their lives, but this solitary life stage has rarely been the subject of focused research. The mantled howler monkey (Alouatta palliata) is a social primate species with bisexual dispersal that lives in mixed-sex groups with low male-to-female sex ratios. Consequently, males often spend a long period of their lives as solitary in…
A Mathematical Modelling Approach to Functionally Defining Forest Edge and Its Utility for Primate Behavioural Edge Effects
Use of palm trees as a sleeping site for hamadryas baboons ( Papio hamadryas hamadryas ) in Ethiopia
Hamadryas baboons sleep on cliffs throughout their range, and this can be attributed to the safety cliffs provide against predators in the absence of tall trees. In this paper, we report the first documented occurrence of hamadryas baboons sleeping in doum palm trees rather than on cliffs. Data derive from a study of hamadryas baboons at the Filoha site in lowland Ethiopia. During all‐day follows, data were collected on travel patterns, band acti…
Male Aggression toward Females in Hamadryas Baboons: Conditioning,Coercion, and Control
The fourth level of social structure in a multi‐level society: Ecological and social functions of clans in hamadryas baboons
Hamadryas baboons are known for their complex, multi‐level social structure consisting of troops, bands, and one‐male units (OMUs) [Kummer, 1968. Social organization of hamadryas baboons. Chicago: The University of Chicago Press. 189p]. Abegglen [1984. On socialization in hamadryas baboons: a field study. Lewisburg, PA: Bucknell University Press. 207p.] observed a fourth level of social structure comprising several OMUs that rested near one anoth…
Female “dispersal” in hamadryas baboons: Transfer among social units in a multilevel society
Unlike most cercopithecines, hamadryas baboons ( Papio hamadryas hamadryas ) are characterized by female‐biased dispersal. To clarify this pattern within the context of their hierarchical social system (comprising one‐male units, clans, bands, and troops), we report here 7 years of data on female transfers among social units in wild hamadryas baboons in Ethiopia. Female tenure in one‐male units (OMUs) ranged from 1 to 2,556 days ( N = 208) and su…
The Socioecology of Network Scaling Ratios in the Multilevel Society of Hamadryas Baboons (Papio hamadryas hamadryas)
Ecology and sociality in a multilevel society: Ecological determinants of spatial cohesion in hamadryas baboons
The multilevel society of hamadryas baboons, consisting of troops, bands, clans, and one‐male units (OMUs), is commonly perceived to be an effective means of adapting to variable food availability while allowing spatial cohesion in response to predator pressure. The relationship between these variables, however, has never been tested quantitatively. The Filoha site in Awash National Park, Ethiopia is ideally suited to such an investigation as it …
Recurrent patterning in the daily foraging routes of hamadryas baboons ( Papio hamadryas ): Spatial memory in large‐scale versus small‐scale space
The benefits of spatial memory for foraging animals can be assessed on two distinct spatial scales: small-scale space (travel within patches) and large-scale space (travel between patches). While the patches themselves may be distributed at low density, within patches resources are likely densely distributed. We propose, therefore, that spatial memory for recalling the particular locations of previously visited feeding sites will be more advantag…
Testing parallel laser image scaling for remotely measuring body dimensions on mantled howling monkeys ( Alouatta palliata )
Body size is a fundamental variable for many studies in primate biology. However, obtaining body dimensions of wild primates through live capture is difficult and costly, so developing an alternative inexpensive and non-invasive method is crucial. Parallel laser image scaling for remotely measuring body size has been used with some success in marine and terrestrial animals, but only one arboreal primate. We further tested the efficacy of this met…
The influence of anthropogenic edge effects on primate populations and their habitat in a fragmented rainforest in Costa Rica
Meat eating in wild hamadryas baboons: Opportunistic trade‐offs between insects and vertebrates
The consumption of meat may provide herbivorous animals with important nutrients that are scarce in their plant‐based diet. Seasonal variation in plant food availability has been suggested to motivate dietary flexibility in a range of species and thus primates may seek more prey when key plant resources are unavailable. Alternatively, prey encounter rate may drive meat eating. Here we investigate patterns of meat eating in hamadryas baboons ( Pap…
Anthropogenic edges impact howler monkey (Alouatta palliata) feeding behaviour in a Costa Rican rainforest
Lone males: Solitary and group‐living male howler monkey ( Alouatta palliata ) behavioral ecology in a Costa Rican rainforest
OBJECTIVES: Many group-living primate species have evolved the capacity for some individuals to live alone for part of their lives, but this solitary life stage has rarely been the subject of focused research. The mantled howler monkey (Alouatta palliata) is a social primate species with bisexual dispersal that lives in mixed-sex groups with low male-to-female sex ratios. Consequently, males often spend a long period of their lives as solitary in…
Behavioral responses to riparian and anthropogenic edge effects in mantled howler monkeys (Alouatta palliata) in a disturbed riverine forest
Maderas Rainforest Conservancy: A One Health approach to conservation
Maderas Rainforest Conservancy (MRC) was incorporated as a conservation nonprofit organization in 2008, and manages two sites where biological field courses have been offered since the 1990s: La Suerte Biological Research Station in Costa Rica, and Ometepe Biological Research Station in Nicaragua. MRC employs a One Health approach to conservation education, and can serve as a model for other biological field sites. The Nicaraguan Molina family, w…
A Mathematical Modelling Approach to Functionally Defining Forest Edge and Its Utility for Primate Behavioural Edge Effects
Student research collaboration as conservation education: A case study from the primate field school at Maderas Rainforest Conservancy
Maderas Rainforest Conservancy (MRC) is a conservation‐focused non‐profit organization that is devoted to protecting the tropical forests they manage in Costa Rica and Nicaragua and to providing conservation education for international university students through biological field schools. The MRC Primate Behavior and Ecology course is their most frequent course offering and is aimed at developing students to be independent field researchers. This…
The Mantled Howler Monkey (Alouatta palliata) Population at La Selva Research Station, Costa Rica: Comparing Censuses in 1992 and 2022
Mantled howler monkeys (Alouatta palliata) alter activity and spatial cohesion across a continuous forest and forest fragment in Costa Rica
Edge effects and social behavior in three platyrrhines
Social behavior is a key adaptation for group‐living primates. It is important to assess changes to social behavior in human‐impacted landscape zones to better understand the impact of anthropogenic disturbance on primate species. We investigated social behavior rate and type in three species of platyrrhines across 100 m anthropogenic edge and interior zones of a fragmented forest in Costa Rica, La Suerte Biological Research Station (LSBRS). Foll…
Biology (18 works) · Primate Behavior and Ecology (18 works) · Ecology (12 works) · Geography (11 works) · Animal Behavior and Reproduction (10 works) · Animal Vocal Communication and Behavior (9 works) · Habitat (9 works) · Wildlife Ecology and Conservation (8 works) · Animal ecology (7 works) · Ecology (7 works)