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Ken Sayers

Biographic Data

ID124701
NAMEKen Sayers
GIVEN NAMESKen
FAMILY NAMESayers
SIGNATURESAYERS K
AFFILIATIONSGeorgia State University
ORCID0009-0001-4995-3975
VERIFIEDYes
TOTAL WORKS10
TOTAL CITATIONS72
AUTHOR COUNT10
EDITOR COUNT0
FIRST PUBLICATION YEAR2008
LATEST PUBLICATION YEAR2026
H-INDEX4
  • Complex Substrates and Bedding for Environmental Enhancement and Research: Or, the Nature of Primates

    Open Access•Ken Sayers, Jaclyn Allen et al.•ARTICLE•American Journal of Primatology•2026

    Complex substrates, including bedding, have generally been known to encourage nonhuman primate species‐typical behaviors and have myriad uses in research, yet are still frequently resisted, especially in laboratory environments. Data show or suggest that complex substrates have the potential to address many primate biological proclivities‐ecological and social‐concurrently, and to a greater degree than is commonly appreciated. A literature review…

  • Genetic characterization of a captive marmoset ( Callithrix jacchus ) colony using genotype‐by‐sequencing

    Open Access•Shelley A Cole, Martha M Lyke et al.•ARTICLE•American Journal of Primatology•2024

    The marmoset is a fundamental nonhuman primate model for the study of aging, neurobiology, and many other topics. Genetic management of captive marmoset colonies is complicated by frequent chimerism in the blood and other tissues, a lack of tools to enable cost‐effective, genome‐wide interrogation of variation, and historic mergers and migrations of animals between colonies. We implemented genotype‐by‐sequencing (GBS) of hair follicle derived DNA…

  • The impact of housing on birth outcomes in breeding macaque groups across multiple research centers

    Open Access•Andrew J Haertel, Brianne A Beisner et al.•ARTICLE•American Journal of Primatology•2023

    Demand for nonhuman primates in research has increased over the past several years, while nonhuman primate supply remains a challenge in the United States. Global nonhuman primate supply issues make it increasingly important to maximize domestic colony production. To explore how housing conditions across primate breeding colonies impact infant survival and animal production more broadly, we collected medical records from 7959 rhesus macaques ( Ma…

  • Ardipithecus Group

    Open Access•Ken Sayers•CHAPTER•Encyclopedia of Evolutionary…•2017

  • On folivory, competition, and intelligence: Generalisms, overgeneralizations, and models of primate evolution

    Open Access•Ken Sayers•ARTICLE•Primates•2013

  • Human Evolution and the Chimpanzee Referential Doctrine

    Ken Sayers, Mary Ann Raghanti et al.•ARTICLE•Annual Review of Anthropology•2012•Cited by: 17•References: 105

    Chimpanzees are our closest living genomic relatives, but they lack the bipedal locomotion, markedly enlarged brains, and advanced communication skills of humans. This has led many to view them as "primitive" and to presume that their behavior and anatomy are also primitive. If true, they could serve as models of our last common ancestor (LCA), i.e., a territorially aggressive knuckle walker, reliant on vertical climbing and below-branch suspensi…

  • Optimal foraging on the roof of the world: Himalayan langurs and the classical prey model

    Open Access•Ken Sayers, Marilyn A Norconk et al.•ARTICLE•American Journal of Physical…•2010•Cited by: 6•References: 70

    Optimal foraging theory has only been sporadically applied to nonhuman primates. The classical prey model, modified for patch choice, predicts a sliding “profitability threshold” for dropping patch types from the diet, preference for profitable foods, dietary niche breadth reduction as encounter rates increase, and that exploitation of a patch type is unrelated to its own abundance. We present results from a 1‐year study testing these predictions…

  • Seasonality of mating and birth in wild black-and-white snub-nosed monkeys (Rhinopithecus bieti) at Xiaochangdu, Tibet

    Open Access•Zuo-Fu Xiang, Ken Sayers•ARTICLE•Primates•2009

  • Himalayan Semnopithecus entellus at Langtang National Park, Nepal: Diet, Activity Patterns, and Resources

    Open Access•Ken Sayers, Marilyn A Norconk•ARTICLE•International Journal of…•2008•Cited by: 13•References: 27

  • The Chimpanzee Has No Clothes: A Critical Examination ofPan troglodytesin Models of Human Evolution

    Ken Sayers, C Owen Lovejoy•ARTICLE•Current Anthropology•2008•Cited by: 36•References: 160

    Chimpanzee referential models for early hominid behavior have become the most common of all current approaches. In addition to chimpanzees' close evolutionary relationship to humans, the justification for this approach is that their behaviors are complex and human-like compared with those of other animals. An examination of four aspects of chimpanzee society that are prominent in discussions of human evolution-bipedal posture, tool use, cooperati…

  • The Chimpanzee Has No Clothes: A Critical Examination ofPan troglodytesin Models of Human Evolution

    Ken Sayers, C Owen Lovejoy•ARTICLE•Current Anthropology•2008•Cited by: 36•References: 160

    Chimpanzee referential models for early hominid behavior have become the most common of all current approaches. In addition to chimpanzees' close evolutionary relationship to humans, the justification for this approach is that their behaviors are complex and human-like compared with those of other animals. An examination of four aspects of chimpanzee society that are prominent in discussions of human evolution-bipedal posture, tool use, cooperati…

  • Human Evolution and the Chimpanzee Referential Doctrine

    Ken Sayers, Mary Ann Raghanti et al.•ARTICLE•Annual Review of Anthropology•2012•Cited by: 17•References: 105

    Chimpanzees are our closest living genomic relatives, but they lack the bipedal locomotion, markedly enlarged brains, and advanced communication skills of humans. This has led many to view them as "primitive" and to presume that their behavior and anatomy are also primitive. If true, they could serve as models of our last common ancestor (LCA), i.e., a territorially aggressive knuckle walker, reliant on vertical climbing and below-branch suspensi…

  • Himalayan Semnopithecus entellus at Langtang National Park, Nepal: Diet, Activity Patterns, and Resources

    Open Access•Ken Sayers, Marilyn A Norconk•ARTICLE•International Journal of…•2008•Cited by: 13•References: 27

  • Optimal foraging on the roof of the world: Himalayan langurs and the classical prey model

    Open Access•Ken Sayers, Marilyn A Norconk et al.•ARTICLE•American Journal of Physical…•2010•Cited by: 6•References: 70

    Optimal foraging theory has only been sporadically applied to nonhuman primates. The classical prey model, modified for patch choice, predicts a sliding “profitability threshold” for dropping patch types from the diet, preference for profitable foods, dietary niche breadth reduction as encounter rates increase, and that exploitation of a patch type is unrelated to its own abundance. We present results from a 1‐year study testing these predictions…

  • Himalayan Semnopithecus entellus at Langtang National Park, Nepal: Diet, Activity Patterns, and Resources

    Open Access•Ken Sayers, Marilyn A Norconk•ARTICLE•International Journal of…•2008•Cited by: 13•References: 27

  • The Chimpanzee Has No Clothes: A Critical Examination ofPan troglodytesin Models of Human Evolution

    Ken Sayers, C Owen Lovejoy•ARTICLE•Current Anthropology•2008•Cited by: 36•References: 160

    Chimpanzee referential models for early hominid behavior have become the most common of all current approaches. In addition to chimpanzees' close evolutionary relationship to humans, the justification for this approach is that their behaviors are complex and human-like compared with those of other animals. An examination of four aspects of chimpanzee society that are prominent in discussions of human evolution-bipedal posture, tool use, cooperati…

  • Seasonality of mating and birth in wild black-and-white snub-nosed monkeys (Rhinopithecus bieti) at Xiaochangdu, Tibet

    Open Access•Zuo-Fu Xiang, Ken Sayers•ARTICLE•Primates•2009

  • Optimal foraging on the roof of the world: Himalayan langurs and the classical prey model

    Open Access•Ken Sayers, Marilyn A Norconk et al.•ARTICLE•American Journal of Physical…•2010•Cited by: 6•References: 70

    Optimal foraging theory has only been sporadically applied to nonhuman primates. The classical prey model, modified for patch choice, predicts a sliding “profitability threshold” for dropping patch types from the diet, preference for profitable foods, dietary niche breadth reduction as encounter rates increase, and that exploitation of a patch type is unrelated to its own abundance. We present results from a 1‐year study testing these predictions…

  • Human Evolution and the Chimpanzee Referential Doctrine

    Ken Sayers, Mary Ann Raghanti et al.•ARTICLE•Annual Review of Anthropology•2012•Cited by: 17•References: 105

    Chimpanzees are our closest living genomic relatives, but they lack the bipedal locomotion, markedly enlarged brains, and advanced communication skills of humans. This has led many to view them as "primitive" and to presume that their behavior and anatomy are also primitive. If true, they could serve as models of our last common ancestor (LCA), i.e., a territorially aggressive knuckle walker, reliant on vertical climbing and below-branch suspensi…

  • On folivory, competition, and intelligence: Generalisms, overgeneralizations, and models of primate evolution

    Open Access•Ken Sayers•ARTICLE•Primates•2013

  • Ardipithecus Group

    Open Access•Ken Sayers•CHAPTER•Encyclopedia of Evolutionary…•2017

  • The impact of housing on birth outcomes in breeding macaque groups across multiple research centers

    Open Access•Andrew J Haertel, Brianne A Beisner et al.•ARTICLE•American Journal of Primatology•2023

    Demand for nonhuman primates in research has increased over the past several years, while nonhuman primate supply remains a challenge in the United States. Global nonhuman primate supply issues make it increasingly important to maximize domestic colony production. To explore how housing conditions across primate breeding colonies impact infant survival and animal production more broadly, we collected medical records from 7959 rhesus macaques ( Ma…

  • Genetic characterization of a captive marmoset ( Callithrix jacchus ) colony using genotype‐by‐sequencing

    Open Access•Shelley A Cole, Martha M Lyke et al.•ARTICLE•American Journal of Primatology•2024

    The marmoset is a fundamental nonhuman primate model for the study of aging, neurobiology, and many other topics. Genetic management of captive marmoset colonies is complicated by frequent chimerism in the blood and other tissues, a lack of tools to enable cost‐effective, genome‐wide interrogation of variation, and historic mergers and migrations of animals between colonies. We implemented genotype‐by‐sequencing (GBS) of hair follicle derived DNA…

  • Complex Substrates and Bedding for Environmental Enhancement and Research: Or, the Nature of Primates

    Open Access•Ken Sayers, Jaclyn Allen et al.•ARTICLE•American Journal of Primatology•2026

    Complex substrates, including bedding, have generally been known to encourage nonhuman primate species‐typical behaviors and have myriad uses in research, yet are still frequently resisted, especially in laboratory environments. Data show or suggest that complex substrates have the potential to address many primate biological proclivities‐ecological and social‐concurrently, and to a greater degree than is commonly appreciated. A literature review…

Primate Behavior and Ecology (10 works) · Biology (8 works) · Ecology (5 works) · Animal Behavior and Reproduction (4 works) · Ecology (4 works) · Animal ecology (3 works) · Evolutionary biology (3 works) · Foraging (3 works) · Geography (3 works) · Habitat (3 works)

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