Rebecca J Lewis
Biographic Data
| ID | 169060 |
|---|---|
| NAME | Rebecca J Lewis |
| GIVEN NAMES | Rebecca J |
| FAMILY NAME | Lewis |
| SIGNATURE | LEWIS R J |
| AFFILIATIONS | The University of Texas at Austin |
| ORCID | 0000-0003-3533-6105 |
| VERIFIED | Yes |
| TOTAL WORKS | 17 |
| TOTAL CITATIONS | 48 |
| AUTHOR COUNT | 17 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 2005 |
| LATEST PUBLICATION YEAR | 2026 |
| H-INDEX | 4 |
Beyond Body Mass, Beyond Adulthood: The Ontogeny of Sexual Size Monomorphism
Energetic Priorities Across the Stages of Development: Effects of Age, Sex, and Seasonal Reproduction on Activity Budgets in Verreaux's sifaka ( Propithecus verreauxi )
The immature period is an essential time of physical and behavioral development in which individuals prepare to navigate their environment as adults. Activity budgets provide valuable insight into the tradeoffs individuals make based on their energetic priorities. We hypothesized that energetic priorities differ across the stages of development based on the distinct social and ecological needs of that stage. We analyzed 31,113.5 h of focal instan…
Consistency in Verreaux's sifaka home range and core area size despite seasonal variation in resource availability as assessed by Enhanced Vegetation Index (EVI)
Primates are adept at dealing with fluctuating availability of resources and display a range of responses to minimize the effects of food scarcity. An important component of primate conservation is to understand how primates adapt their foraging and ranging patterns in response to fluctuating food resources. Animals optimize resource acquisition within the home range through the selection of resource‐bearing patches and choose between contrasting…
Wild Verreaux’s Sifaka (Propithecus verreauxi) Respond Flexibly to Sperm Competition in Their Social Environment
The Collective Action Problem but Not Numerical Superiority Explains Success in Intergroup Encounters in Verreaux’s Sifaka (Propithecus verreauxi): Implications for Individual Participation and Free-R…
Female Power in Verreaux’s Sifaka (Propithecus verreauxi) Is Based on Maturity, Not Body Size
Subordination signals improve the quality of social relationships in Verreaux's Sifaka: Implications for the evolution of power structures and social complexity
OBJECTIVES: Unidirectional dominance-related signals can be used to communicate submission (an immediate behavioral response) or subordination (the status of an established relationship). Subordination signals are defined as emitted during peaceful interactions and are hypothesized to be critical for the evolution of social complexity and robust power structures because they reduce uncertainty in social relationships. The chatter vocalization in …
Female Power in Primates and the Phenomenon of Female Dominance
Sex-biased power structures are common in human and nonhuman primate societies. "Female dominance" is a term applied to a wide range of female-biased power structures. However, the full extent of this variation remains obscure because an adequate vocabulary of power has not been adopted consistently. Female power occurs throughout primates and other animals, even in male-dominant societies, but the legacy of patriarchy persists in primatologists'…
Patterns of male dispersal in Verreaux's sifaka ( Propithecus verreauxi ) at Kirindy Mitea National Park
Males of many group-living mammals emigrate from their social groups to improve mating opportunities. To help mitigate the social and locational costs of dispersal and to increase reproductive benefits, they may immigrate seasonally, immigrate alongside a partner, and/or replace the alpha male (versus entering a group as a subordinate). Verreaux's sifaka (Propithecus verreauxi) are highly seasonally breeding primates characterized by male-biased …
Noninvasive molecular sexing: An evaluation and validation of the SRY‐ and amelogenin‐based method in three new lemur species
Many lemur species are arboreal, elusive, and/or nocturnal and are consequently difficult to approach, observe and catch. In addition, most of them are endangered. For these reasons, non‐invasive sampling is especially useful in primates including lemurs. A key issue in conservation and ecological studies is to identify the sex of the sampled individuals to investigate sex‐biased dispersal, parentage, social organization and population sex ratio.…
Grooming patterns in Verreaux's sifaka
Lemur grooming has received very little attention in the literature. Nevertheless, allogrooming in lemurs has been suggested to be fundamentally different from the grooming of anthropoids. One reason is that lemurs generally rely on oral rather than manual grooming. Lemur allogrooming has also been suggested to serve less of a social function than has been attributed to anthropoid grooming. I analyzed the allogrooming behaviors of 29 Verreaux's s…
Social Influences on Group Membership in Propithecus verreauxi verreauxi
Bimorphism in Male Verreaux’s Sifaka in the Kirindy Forest of Madagascar
Scent marking in sifaka: No one function explains it all
Various hypotheses to explain possible functions of scent‐marking have been put forth and basically fall into five categories: territorial demarcation, ownership of resources, mate attraction, noncombative fighting, and self‐advertisement. Verreaux's sifaka ( Propithecus verreauxi verreauxi ), like many prosimians, use scent‐marking as one form of communication. The goal of this study was to determine the function of scent‐marking in sifaka. All‐…
Are Kirindy sifaka capital or income breeders? It depends
The capital and income breeding framework has only recently been used to explain variation in female reproductive strategies in primates. The application of this framework to primates and other mammals with long reproductive cycles has not been consistent. We evaluated data on Verreaux's sifaka (Propithecus verreauxi verreauxi) in the Kirindy Forest of western Madagascar to determine whether they are capital or income breeders. We found that Verr…
Seasonality, body condition, and timing of reproduction inPropithecus verreauxi verreauxi in the Kirindy Forest
Mammals that live in seasonal environments may adjust their reproductive cycles to cope with fluctuations in food availability. Because lemurs in Madagascar experience highly seasonal variation in food availability, we examined the effects of fluctuating food availability on body condition and reproduction in one of the larger living species, Verreaux's sifaka (Propithecus verreauxi verreauxi), in the Kirindy Forest of western Madagascar. Seven y…
Sex differences in scent-marking in sifaka: Mating conflict or male services
Male and female interests can either be in conflict or serve as a basis for exchange. Communication is thus an important aspect of intersexual relationships. Verreaux's sifaka (Propithecus verreauxi verreauxi), like many prosimians, uses chemical signals as one form of communication. The goals of this study were to determine 1) if males and females exhibit sex differences in their scent-marking behavior, and 2) if scent-marking is an example of m…
Bimorphism in Male Verreaux’s Sifaka in the Kirindy Forest of Madagascar
Sex differences in scent-marking in sifaka: Mating conflict or male services
Male and female interests can either be in conflict or serve as a basis for exchange. Communication is thus an important aspect of intersexual relationships. Verreaux's sifaka (Propithecus verreauxi verreauxi), like many prosimians, uses chemical signals as one form of communication. The goals of this study were to determine 1) if males and females exhibit sex differences in their scent-marking behavior, and 2) if scent-marking is an example of m…
Female Power in Primates and the Phenomenon of Female Dominance
Sex-biased power structures are common in human and nonhuman primate societies. "Female dominance" is a term applied to a wide range of female-biased power structures. However, the full extent of this variation remains obscure because an adequate vocabulary of power has not been adopted consistently. Female power occurs throughout primates and other animals, even in male-dominant societies, but the legacy of patriarchy persists in primatologists'…
Social Influences on Group Membership in Propithecus verreauxi verreauxi
The Collective Action Problem but Not Numerical Superiority Explains Success in Intergroup Encounters in Verreaux’s Sifaka (Propithecus verreauxi): Implications for Individual Participation and Free-R…
Female Power in Verreaux’s Sifaka (Propithecus verreauxi) Is Based on Maturity, Not Body Size
Subordination signals improve the quality of social relationships in Verreaux's Sifaka: Implications for the evolution of power structures and social complexity
OBJECTIVES: Unidirectional dominance-related signals can be used to communicate submission (an immediate behavioral response) or subordination (the status of an established relationship). Subordination signals are defined as emitted during peaceful interactions and are hypothesized to be critical for the evolution of social complexity and robust power structures because they reduce uncertainty in social relationships. The chatter vocalization in …
Are Kirindy sifaka capital or income breeders? It depends
The capital and income breeding framework has only recently been used to explain variation in female reproductive strategies in primates. The application of this framework to primates and other mammals with long reproductive cycles has not been consistent. We evaluated data on Verreaux's sifaka (Propithecus verreauxi verreauxi) in the Kirindy Forest of western Madagascar to determine whether they are capital or income breeders. We found that Verr…
Seasonality, body condition, and timing of reproduction inPropithecus verreauxi verreauxi in the Kirindy Forest
Mammals that live in seasonal environments may adjust their reproductive cycles to cope with fluctuations in food availability. Because lemurs in Madagascar experience highly seasonal variation in food availability, we examined the effects of fluctuating food availability on body condition and reproduction in one of the larger living species, Verreaux's sifaka (Propithecus verreauxi verreauxi), in the Kirindy Forest of western Madagascar. Seven y…
Sex differences in scent-marking in sifaka: Mating conflict or male services
Male and female interests can either be in conflict or serve as a basis for exchange. Communication is thus an important aspect of intersexual relationships. Verreaux's sifaka (Propithecus verreauxi verreauxi), like many prosimians, uses chemical signals as one form of communication. The goals of this study were to determine 1) if males and females exhibit sex differences in their scent-marking behavior, and 2) if scent-marking is an example of m…
Scent marking in sifaka: No one function explains it all
Various hypotheses to explain possible functions of scent‐marking have been put forth and basically fall into five categories: territorial demarcation, ownership of resources, mate attraction, noncombative fighting, and self‐advertisement. Verreaux's sifaka ( Propithecus verreauxi verreauxi ), like many prosimians, use scent‐marking as one form of communication. The goal of this study was to determine the function of scent‐marking in sifaka. All‐…
Bimorphism in Male Verreaux’s Sifaka in the Kirindy Forest of Madagascar
Social Influences on Group Membership in Propithecus verreauxi verreauxi
Grooming patterns in Verreaux's sifaka
Lemur grooming has received very little attention in the literature. Nevertheless, allogrooming in lemurs has been suggested to be fundamentally different from the grooming of anthropoids. One reason is that lemurs generally rely on oral rather than manual grooming. Lemur allogrooming has also been suggested to serve less of a social function than has been attributed to anthropoid grooming. I analyzed the allogrooming behaviors of 29 Verreaux's s…
Noninvasive molecular sexing: An evaluation and validation of the SRY‐ and amelogenin‐based method in three new lemur species
Many lemur species are arboreal, elusive, and/or nocturnal and are consequently difficult to approach, observe and catch. In addition, most of them are endangered. For these reasons, non‐invasive sampling is especially useful in primates including lemurs. A key issue in conservation and ecological studies is to identify the sex of the sampled individuals to investigate sex‐biased dispersal, parentage, social organization and population sex ratio.…
Patterns of male dispersal in Verreaux's sifaka ( Propithecus verreauxi ) at Kirindy Mitea National Park
Males of many group-living mammals emigrate from their social groups to improve mating opportunities. To help mitigate the social and locational costs of dispersal and to increase reproductive benefits, they may immigrate seasonally, immigrate alongside a partner, and/or replace the alpha male (versus entering a group as a subordinate). Verreaux's sifaka (Propithecus verreauxi) are highly seasonally breeding primates characterized by male-biased …
Female Power in Primates and the Phenomenon of Female Dominance
Sex-biased power structures are common in human and nonhuman primate societies. "Female dominance" is a term applied to a wide range of female-biased power structures. However, the full extent of this variation remains obscure because an adequate vocabulary of power has not been adopted consistently. Female power occurs throughout primates and other animals, even in male-dominant societies, but the legacy of patriarchy persists in primatologists'…
Female Power in Verreaux’s Sifaka (Propithecus verreauxi) Is Based on Maturity, Not Body Size
Subordination signals improve the quality of social relationships in Verreaux's Sifaka: Implications for the evolution of power structures and social complexity
OBJECTIVES: Unidirectional dominance-related signals can be used to communicate submission (an immediate behavioral response) or subordination (the status of an established relationship). Subordination signals are defined as emitted during peaceful interactions and are hypothesized to be critical for the evolution of social complexity and robust power structures because they reduce uncertainty in social relationships. The chatter vocalization in …
The Collective Action Problem but Not Numerical Superiority Explains Success in Intergroup Encounters in Verreaux’s Sifaka (Propithecus verreauxi): Implications for Individual Participation and Free-R…
Consistency in Verreaux's sifaka home range and core area size despite seasonal variation in resource availability as assessed by Enhanced Vegetation Index (EVI)
Primates are adept at dealing with fluctuating availability of resources and display a range of responses to minimize the effects of food scarcity. An important component of primate conservation is to understand how primates adapt their foraging and ranging patterns in response to fluctuating food resources. Animals optimize resource acquisition within the home range through the selection of resource‐bearing patches and choose between contrasting…
Wild Verreaux’s Sifaka (Propithecus verreauxi) Respond Flexibly to Sperm Competition in Their Social Environment
Energetic Priorities Across the Stages of Development: Effects of Age, Sex, and Seasonal Reproduction on Activity Budgets in Verreaux's sifaka ( Propithecus verreauxi )
The immature period is an essential time of physical and behavioral development in which individuals prepare to navigate their environment as adults. Activity budgets provide valuable insight into the tradeoffs individuals make based on their energetic priorities. We hypothesized that energetic priorities differ across the stages of development based on the distinct social and ecological needs of that stage. We analyzed 31,113.5 h of focal instan…
Beyond Body Mass, Beyond Adulthood: The Ontogeny of Sexual Size Monomorphism
Primate Behavior and Ecology (16 works) · Biology (15 works) · Animal Behavior and Reproduction (14 works) · Ecology (14 works) · Zoology (9 works) · Lemur (8 works) · Primate (7 works) · Sociology (7 works) · Demography (6 works) · Wildlife Ecology and Conservation (6 works)