Cheryl D Knott
Biographic Data
| ID | 124926 |
|---|---|
| NAME | Cheryl D Knott |
| GIVEN NAMES | Cheryl D |
| FAMILY NAME | Knott |
| SIGNATURE | KNOTT C D |
| AFFILIATIONS | Boston University |
| ORCID | 0000-0002-1940-7199 |
| VERIFIED | Yes |
| TOTAL WORKS | 24 |
| TOTAL CITATIONS | 151 |
| AUTHOR COUNT | 24 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 1998 |
| LATEST PUBLICATION YEAR | 2026 |
| H-INDEX | 5 |
Terrestrial Positional Behavior of Wild Pongo pygmaeus
Sex Differences in Estimated Lean Body Mass of Captive and Wild Orangutans
Using Deep Learning to Automate Orangutan Nest Detections on Aerial Images Collected With Drones
Traditional orangutan distribution and density monitoring requires costly line transect methods on the ground to detect their nests. Recently researchers have started to use unoccupied aerial vehicles, hereafter referred to as drones, to collect such data faster. However, manually inspecting the images acquired by the drone is time‐consuming and hence costly. This study explored a deep learning method for the automated detection of orangutan nest…
Mother‐offspring proximity maintenance as an infanticide avoidance strategy in bornean orangutans ( Pongo pygmaeus wurmbii )
Sexually‐selected infanticide by males is widespread across primates. Maternal protection is one of many infanticide avoidance strategies employed by female primates. Bornean orangutan ( Pongo pygmaeus wurmbii ) mothers with younger offspring are less social with males than mothers with older offspring. Additionally, the distance between a mother and offspring decreases in the presence of male conspecifics, but not female conspecifics. We hypothe…
A composite menstrual cycle of captive orangutans, with associated hormonal and behavioral variability
Knowledge of species‐typical reproductive endocrinology profiles is crucial for testing hypotheses pertaining to the evolutionary history, reproductive parameters, and life history of a species, and for managing the well‐being of individual animals in human care. Large‐scale empirical measurements of ovarian hormones, however, are rare for most primate species, including orangutans. In this study, we used enzyme immunoassays (EIA) to quantify est…
Famished Frugivores or Choosy Consumers: A Generalist Frugivore (Wild Bornean Orangutans, Pongo pygmaeus wurmbii) Leaves Available Fruit for Nonfruit Foods
Application of a parallel laser apparatus to measure forearms and flanges of wild Bornean orangutans ( Pongo pygmaeus wurmbii )
We constructed a parallel laser photogrammetry apparatus constructed from commercially available parts, and measured forearm lengths and flange widths of 16 wild Bornean orangutans. Our objectives were to validate our method and apparatus, discuss issues encountered, and construct preliminary growth curves. For adult males, we also compared flange width to forearm length as a way to investigate the relationship between body size and flange develo…
Wild Bornean orangutan ( Pongo pygmaeus wurmbii ) feeding rates and the Marginal Value Theorem
The Marginal Value Theorem (MVT) is an integral supplement to Optimal Foraging Theory (OFT) as it seeks to explain an animal's decision of when to leave a patch when food is still available. MVT predicts that a forager capable of depleting a patch, in a habitat where food is patchily distributed, will leave the patch when the intake rate within it decreases to the average intake rate for the habitat. MVT relies on the critical assumption that the…
Reducing the primate pet trade: Actions for primatologists
This commentary emerged from a panel presentation at the International Primatological Society Congress in Nairobi, Kenya, 2018. The goal was to provide regional updates on the status of primate removal from habitat countries, especially for the pet trade, and develop guidelines that could help primatologists address this critical problem. The trade in live primates includes those used as pets, in entertainment, and as subjects of biomedical exper…
Sociosexual behavioral patterns involving nulliparous female orangutans ( Pongo sp.) reflect unique challenges during the adolescent period
The primate adolescent period is characterized by a series of changes in physiology, behavior, and social relationships. Orangutans have the slowest life history and the longest period of dependency of all primates. As members of a semisolitary species with high levels of sexual coercion, adolescent female orangutans face a unique combination of challenges when achieving independence from their mother. This study examined the mating behavior of a…
One Collection, Two Contexts: The Ella Reid Public Library Archives
La bibliothèque Ella Reid, établissement réservé aux Africain.e.s-Américain.e.s pendant la ségrégation, a été ouverte au public entre les années 1940 et 1960 dans la ville de Tyler, au Texas. Ses archives sont aujourd’hui hébergées par une bibliothèque de recherche à Philadelphie en Pennsylvanie, tandis que la bibliothèque municipale de Tyler n’a conservé qu’une copie des originaux. Les archives et leurs copies peuvent sembler identiques, mais, c…
Are Male Orangutans a Threat to Infants? Evidence of Mother–Offspring Counterstrategies to Infanticide in Bornean Orangutans (Pongo pygmaeus wurmbii)
The slow ape: High infant survival and long interbirth intervals in wild orangutans
Ten years of orangutan‐related wildlife crime investigation in West Kalimantan, Indonesia
Poaching for the pet trade is considered one of the main threats to orangutan survival, especially to the Bornean species (Pongo pygmaeus). However, there have been few attempts to quantify the number of individuals taken from the wild or to evaluate the drivers of the trade. Most orangutan poaching is thought to be opportunistic in nature, occurring in conjunction with deforestation for large-scale agriculture. Using data from our long-term wild…
Proto-consonants were information-dense via identical bioacoustic tags to proto-vowels
A Noninvasive Method for Estimating Nitrogen Balance in Free-Ranging Primates
Infant sex predicts breast milk energy content
During human evolutionary history, and for many around the world, breast milk is the primary source of nutritional energy for infants. Variation in breast milk quality might logically have important effects on infant health, growth, and development, yet the sources of this variation remain largely unelucidated. We quantified nutrient and energy content of breast milk from 25 healthy, well-nourished Massachusetts mothers with infants aged 2-5 mont…
A Comparison of Female Mating Strategies in Pan troglodytes and Pongo spp
Female-Female Competition in Bornean Orangutans
Fertility and mortality patterns of captive Bornean and Sumatran orangutans: Is There a Species Difference in Life History
Radioimmunoassay of estrone conjugates from urine dried on filter paper
Hormonal analysis of urine from free‐ranging primates has been limited due to the difficulty of preserving samples under field conditions. Drying urine on filter paper is an alternative for field preservation. This study describes a new laboratory method for eluting steroids from filter paper with methanol, along with a series of experiments used to develop and validate this method. The overall elution recovery of estrone sulfate (ES) from filter…
Orangutan Cultures and the Evolution of Material Culture
Geographic variation in some aspects of chimpanzee behavior has been interpreted as evidence for culture. Here we document similar geographic variation in orangutan behaviors. Moreover, as expected under a cultural interpretation, we find a correlation between geographic distance and cultural difference, a correlation between the abundance of opportunities for social learning and the size of the local cultural repertoire, and no effect of habitat…
Geographic variation in tool use on Neesia fruits in orangutans
Geographic variation in the presence of skilled behavior may reflect geographic variation in genetic predispositions or ecological conditions (accompanied by reliable expression during development), or it may reflect the vagaries of invention and the appropriate social conditions for persistence. In this study, we compare the feeding techniques and tool‐using skills used by orangutans to extract the nutritious seeds from Neesia fruits between Sua…
Changes in Orangutan Caloric Intake, Energy Balance, and Ketones in Response to Fluctuating Fruit Availability
Changes in Orangutan Caloric Intake, Energy Balance, and Ketones in Response to Fluctuating Fruit Availability
Geographic variation in tool use on Neesia fruits in orangutans
Geographic variation in the presence of skilled behavior may reflect geographic variation in genetic predispositions or ecological conditions (accompanied by reliable expression during development), or it may reflect the vagaries of invention and the appropriate social conditions for persistence. In this study, we compare the feeding techniques and tool‐using skills used by orangutans to extract the nutritious seeds from Neesia fruits between Sua…
The slow ape: High infant survival and long interbirth intervals in wild orangutans
A Noninvasive Method for Estimating Nitrogen Balance in Free-Ranging Primates
Female-Female Competition in Bornean Orangutans
Fertility and mortality patterns of captive Bornean and Sumatran orangutans: Is There a Species Difference in Life History
A Comparison of Female Mating Strategies in Pan troglodytes and Pongo spp
Are Male Orangutans a Threat to Infants? Evidence of Mother–Offspring Counterstrategies to Infanticide in Bornean Orangutans (Pongo pygmaeus wurmbii)
Changes in Orangutan Caloric Intake, Energy Balance, and Ketones in Response to Fluctuating Fruit Availability
Geographic variation in tool use on Neesia fruits in orangutans
Geographic variation in the presence of skilled behavior may reflect geographic variation in genetic predispositions or ecological conditions (accompanied by reliable expression during development), or it may reflect the vagaries of invention and the appropriate social conditions for persistence. In this study, we compare the feeding techniques and tool‐using skills used by orangutans to extract the nutritious seeds from Neesia fruits between Sua…
Orangutan Cultures and the Evolution of Material Culture
Geographic variation in some aspects of chimpanzee behavior has been interpreted as evidence for culture. Here we document similar geographic variation in orangutan behaviors. Moreover, as expected under a cultural interpretation, we find a correlation between geographic distance and cultural difference, a correlation between the abundance of opportunities for social learning and the size of the local cultural repertoire, and no effect of habitat…
Radioimmunoassay of estrone conjugates from urine dried on filter paper
Hormonal analysis of urine from free‐ranging primates has been limited due to the difficulty of preserving samples under field conditions. Drying urine on filter paper is an alternative for field preservation. This study describes a new laboratory method for eluting steroids from filter paper with methanol, along with a series of experiments used to develop and validate this method. The overall elution recovery of estrone sulfate (ES) from filter…
A Comparison of Female Mating Strategies in Pan troglodytes and Pongo spp
Female-Female Competition in Bornean Orangutans
Fertility and mortality patterns of captive Bornean and Sumatran orangutans: Is There a Species Difference in Life History
Infant sex predicts breast milk energy content
During human evolutionary history, and for many around the world, breast milk is the primary source of nutritional energy for infants. Variation in breast milk quality might logically have important effects on infant health, growth, and development, yet the sources of this variation remain largely unelucidated. We quantified nutrient and energy content of breast milk from 25 healthy, well-nourished Massachusetts mothers with infants aged 2-5 mont…
A Noninvasive Method for Estimating Nitrogen Balance in Free-Ranging Primates
Ten years of orangutan‐related wildlife crime investigation in West Kalimantan, Indonesia
Poaching for the pet trade is considered one of the main threats to orangutan survival, especially to the Bornean species (Pongo pygmaeus). However, there have been few attempts to quantify the number of individuals taken from the wild or to evaluate the drivers of the trade. Most orangutan poaching is thought to be opportunistic in nature, occurring in conjunction with deforestation for large-scale agriculture. Using data from our long-term wild…
Proto-consonants were information-dense via identical bioacoustic tags to proto-vowels
The slow ape: High infant survival and long interbirth intervals in wild orangutans
Are Male Orangutans a Threat to Infants? Evidence of Mother–Offspring Counterstrategies to Infanticide in Bornean Orangutans (Pongo pygmaeus wurmbii)
Wild Bornean orangutan ( Pongo pygmaeus wurmbii ) feeding rates and the Marginal Value Theorem
The Marginal Value Theorem (MVT) is an integral supplement to Optimal Foraging Theory (OFT) as it seeks to explain an animal's decision of when to leave a patch when food is still available. MVT predicts that a forager capable of depleting a patch, in a habitat where food is patchily distributed, will leave the patch when the intake rate within it decreases to the average intake rate for the habitat. MVT relies on the critical assumption that the…
Reducing the primate pet trade: Actions for primatologists
This commentary emerged from a panel presentation at the International Primatological Society Congress in Nairobi, Kenya, 2018. The goal was to provide regional updates on the status of primate removal from habitat countries, especially for the pet trade, and develop guidelines that could help primatologists address this critical problem. The trade in live primates includes those used as pets, in entertainment, and as subjects of biomedical exper…
Sociosexual behavioral patterns involving nulliparous female orangutans ( Pongo sp.) reflect unique challenges during the adolescent period
The primate adolescent period is characterized by a series of changes in physiology, behavior, and social relationships. Orangutans have the slowest life history and the longest period of dependency of all primates. As members of a semisolitary species with high levels of sexual coercion, adolescent female orangutans face a unique combination of challenges when achieving independence from their mother. This study examined the mating behavior of a…
One Collection, Two Contexts: The Ella Reid Public Library Archives
La bibliothèque Ella Reid, établissement réservé aux Africain.e.s-Américain.e.s pendant la ségrégation, a été ouverte au public entre les années 1940 et 1960 dans la ville de Tyler, au Texas. Ses archives sont aujourd’hui hébergées par une bibliothèque de recherche à Philadelphie en Pennsylvanie, tandis que la bibliothèque municipale de Tyler n’a conservé qu’une copie des originaux. Les archives et leurs copies peuvent sembler identiques, mais, c…
Application of a parallel laser apparatus to measure forearms and flanges of wild Bornean orangutans ( Pongo pygmaeus wurmbii )
We constructed a parallel laser photogrammetry apparatus constructed from commercially available parts, and measured forearm lengths and flange widths of 16 wild Bornean orangutans. Our objectives were to validate our method and apparatus, discuss issues encountered, and construct preliminary growth curves. For adult males, we also compared flange width to forearm length as a way to investigate the relationship between body size and flange develo…
Mother‐offspring proximity maintenance as an infanticide avoidance strategy in bornean orangutans ( Pongo pygmaeus wurmbii )
Sexually‐selected infanticide by males is widespread across primates. Maternal protection is one of many infanticide avoidance strategies employed by female primates. Bornean orangutan ( Pongo pygmaeus wurmbii ) mothers with younger offspring are less social with males than mothers with older offspring. Additionally, the distance between a mother and offspring decreases in the presence of male conspecifics, but not female conspecifics. We hypothe…
A composite menstrual cycle of captive orangutans, with associated hormonal and behavioral variability
Knowledge of species‐typical reproductive endocrinology profiles is crucial for testing hypotheses pertaining to the evolutionary history, reproductive parameters, and life history of a species, and for managing the well‐being of individual animals in human care. Large‐scale empirical measurements of ovarian hormones, however, are rare for most primate species, including orangutans. In this study, we used enzyme immunoassays (EIA) to quantify est…
Famished Frugivores or Choosy Consumers: A Generalist Frugivore (Wild Bornean Orangutans, Pongo pygmaeus wurmbii) Leaves Available Fruit for Nonfruit Foods
Using Deep Learning to Automate Orangutan Nest Detections on Aerial Images Collected With Drones
Traditional orangutan distribution and density monitoring requires costly line transect methods on the ground to detect their nests. Recently researchers have started to use unoccupied aerial vehicles, hereafter referred to as drones, to collect such data faster. However, manually inspecting the images acquired by the drone is time‐consuming and hence costly. This study explored a deep learning method for the automated detection of orangutan nest…
Terrestrial Positional Behavior of Wild Pongo pygmaeus
Sex Differences in Estimated Lean Body Mass of Captive and Wild Orangutans
Biology (19 works) · Primate Behavior and Ecology (19 works) · Ecology (11 works) · Zoology (9 works) · Wildlife Ecology and Conservation (8 works) · Demography (7 works) · Pongo pygmaeus (7 works) · Psychology (7 works) · Animal Behavior and Reproduction (6 works) · Animal ecology (6 works)