Dorothy Fragaszy
Dados Biográficos
| ID | 626807 |
|---|---|
| NOME | Dorothy Fragaszy |
| PRENOMES | Dorothy |
| SOBRENOME | Fragaszy |
| ASSINATURA | FRAGASZY D |
| AFILIAÇÕES | Department of Psychology University of Georgia Athens GA |
| VERIFICADO | Não |
| TOTAL DE OBRAS | 25 |
| TOTAL DE CITAÇÕES | 89 |
| TOTAL COMO AUTOR | 25 |
| TOTAL COMO EDITOR | 0 |
| PRIMEIRO ANO DE PUBLICAÇÃO | 1994 |
| ANO MAIS RECENTE DE PUBLICAÇÃO | 2026 |
| ÍNDICE H | 6 |
Bimanual Coordination and Right‐Hand Bias in Extractive Foraging by Wild Sapajus libidinosus
Bimanual coordination is considered a crucial factor in the evolution of manual lateralization. Experimental tasks requiring the simultaneous and coordinated use of both hands induce hand preferences at the population level across various nonhuman primate species studied in captive environments. However, to date, research investigating laterality in bimanual coordination within natural settings remains scarce, especially with respect to platyrrhi…
Rare Bearded Capuchin (Sapajus libidinosus) Tool-Use Culture is Threatened by Land use Changes in Northeastern Brazil
Foraging and inter‐individual distances of bearded capuchin monkeys
Extractive foraging is a skill young capuchin monkeys learn over time. A key unknown is whether unskilled individuals occupy spatial positions that increase their opportunities to learn. We observed the spatial positions of individuals in a group of capuchin monkeys in Northeastern Brazil. To improve our understanding of the relationship between learning by young capuchin monkeys and inter-individual distance, we investigated the associations bet…
Coexistence Between Humans and Capuchins (Sapajus libidinosus)
The strategic role of the tail in maintaining balance while carrying a load bipedally in wild capuchins (Sapajus libidinosus)
Age‐related variation in the mechanical properties of foods processed by S apajus libidinosus
OBJECTIVES: The diet of tufted capuchins (Sapajus) is characterized by annual or seasonal incorporation of mechanically protected foods. Reliance on these foods raises questions about the dietary strategies of young individuals that lack strength and experience to access these resources. Previous research has demonstrated differences between the feeding competencies of adult and juvenile tufted capuchins. Here we test the hypothesis that, compare…
Kinetics of bipedal locomotion during load carrying in capuchin monkeys
Use of stone hammer tools and anvils by bearded capuchin monkeys over time and space
Flexible and conservative features of social systems in tufted capuchin monkeys
Socioecological models assume that primates adapt their social behavior to ecological conditions, and predict that food availability and distribution, predation risk and risk of infanticide by males affect patterns of social organization, social structure and mating system of primates. However, adaptability and variation of social behavior may be constrained by conservative adaptations and by phylogenetic inertia. The comparative study of closely…
Kinematics of bipedal locomotion while carrying a load in the arms in bearded capuchin monkeys (Sapajus libidinosus)
Stone tool use by adult wild bearded capuchin monkeys (Cebus libidinosus). Frequency, efficiency and tool selectivity
Understanding emotions in primates
In the bicentenary year of Darwin's birth, the American Society of Primatologists honored his memory by convening a symposium entitled “Understanding emotions in primates: In honor of Darwin's 200th birthday.” The four articles in this special section, excepting this introduction, derive from that symposium. The section confirms that the topic of emotion is once again, as in Darwin's lifetime, the subject of wide‐ranging, theoretically exciting r…
Infants Experience Perceptual Narrowing for Nonprimate Faces
Perceptual narrowing—a phenomenon in which perception is broad from birth, but narrows as a function of experience—has previously been tested with primate faces. In the first 6 months of life, infants can discriminate among individual human and monkey faces. Though the ability to discriminate monkey faces is lost after about 9 months, infants retain human face discrimination, presumably because of their experience with human faces. The current st…
The ontogeny of handling hard‐to‐process food in wild brown capuchins ( Cebus apella apella )
We examined age‐related differences in wild brown capuchins' foraging efficiency and the food‐processing behaviors directed toward maripa palm fruit ( Maximiliana maripa ). A detailed comparison of the different foraging techniques showed that plucking the fruit from the infructescence constituted the main difficulty of this task. Foraging efficiency tended to increase with age, with a threshold at which sufficient strength allowed immatures by t…
Distribution of potential suitable hammers and transport of hammer tools and nuts by wild capuchin monkeys
Fallback foraging as a way of life
The genus Cebus is one of the best extant models for examining the role of fallback foods in primate evolution. Cebus includes the tufted capuchins, which exhibit skeletal features for the exploitation of hard and tough foods. Paradoxically, these seemingly “specialized” taxa belong to the most ubiquitous group of closely related primates in South America, thriving in a range of different habitats. This appears to be a consequence of their abilit…
Dynamic in‐hand movements in adult and young juvenile chimpanzees ( Pan troglodytes )
Descriptions of manual function in nonhuman primates have largely focused on static precision and power grasping (as first defined by Napier, 1956 ), while identification and description of dynamic manual function are rare and incomplete. Here, we describe several forms of in‐hand movements used by chimpanzees ( Pan troglodytes ) when manipulating small objects. In‐hand movements are defined as the movement of an object within one hand via manipu…
Cross‐genus adoption of a marmoset ( Callithrix jacchus ) by wild capuchin monkeys ( Cebus libidinosus )
We report a case of interspecies adoption of an infant marmoset ( Callithrix jacchus ) by wild capuchin monkeys ( Cebus libidinosus ). The marmoset was an infant when it was first observed in the capuchin group on 3 March 2004. Since it first appeared it has been observed informally and frequently. In January 2005 systematic observations were made of the marmoset and a capuchin of similar age. Throughout its period of adoption the marmoset appear…
Wild capuchin monkeys ( Cebus libidinosus ) use anvils and stone pounding tools
We conducted an exploratory investigation in an area where nut‐cracking by wild capuchin monkeys is common knowledge among local residents. In addition to observing male and female capuchin monkeys using stones to pound open nuts on stone “anvils,” we surveyed the surrounding area and found physical evidence that monkeys cracked nuts on rock outcrops, boulders, and logs (collectively termed anvils). Anvils, which were identified by numerous shall…
Making space for traditions
For quite some time, the question of continuity across species with respect to culture has been linked in the academic world with definitional issues: What is culture, and how we can identify culture in a nonverbal species?1-4 Behavioral scientists agree that behavioral traditions are that aspect of culture we can study in nonhuman animals, and we recognize that traditions are widespread in the animal kingdom (reviewed in Fragaszy and Perry,5 see…
Prehension in infant capuchins (Cebus apella) from six weeks to twenty-four weeks
We analyzed the spontaneous prehensile activity of two infants living with their mothers in social groups, using videotapes taken once weekly from weeks 5 to 24. Prehensile activities were laterally symmetric. Unimanual activity predominated, although bimanual activity appeared at the same ages as unimanual activity. In most bimanual activity the two hands performed the same action, but complementary actions occurred from the onset of bimanual ac…
Manual Function in Cebus apella. Digital Mobility, Preshaping, and Endurance in Repetitive Grasping
Social context and consumption of unfamiliar foods by capuchin monkeys (Cebus apella) over repeated encounters
Visalberghi and Fragaszy [Animal Behaviour 49:1089–1095, 1995] have shown that social influences affect acceptance of novel foods. However, little is known about the temporal course on which such influences act (e.g., for how long they persist and for how many encounters they are effective). To explore this issue, 11 adult tufted capuchins were observed during ten successive encounters with eight unfamiliar foods (phase 1, in which subjects were …
Social context and consumption of unfamiliar foods by capuchin monkeys (Cebus apella) over repeated encounters
Visalberghi and Fragaszy [Animal Behaviour 49:1089-1095, 1995] have shown that social influences affect acceptance of novel foods. However, little is known about the temporal course on which such influences act (e.g., for how long they persist and for how many encounters they are effective). To explore this issue, 11 adult tufted capuchins were observed during ten successive encounters with eight unfamiliar foods (phase 1, in which subjects were …
Introduction and integration of strangers into captive groups of tufted capuchins (Cebus apella)
Fallback foraging as a way of life
The genus Cebus is one of the best extant models for examining the role of fallback foods in primate evolution. Cebus includes the tufted capuchins, which exhibit skeletal features for the exploitation of hard and tough foods. Paradoxically, these seemingly “specialized” taxa belong to the most ubiquitous group of closely related primates in South America, thriving in a range of different habitats. This appears to be a consequence of their abilit…
Coexistence Between Humans and Capuchins (Sapajus libidinosus)
Use of stone hammer tools and anvils by bearded capuchin monkeys over time and space
Dynamic in‐hand movements in adult and young juvenile chimpanzees ( Pan troglodytes )
Descriptions of manual function in nonhuman primates have largely focused on static precision and power grasping (as first defined by Napier, 1956 ), while identification and description of dynamic manual function are rare and incomplete. Here, we describe several forms of in‐hand movements used by chimpanzees ( Pan troglodytes ) when manipulating small objects. In‐hand movements are defined as the movement of an object within one hand via manipu…
Age‐related variation in the mechanical properties of foods processed by S apajus libidinosus
OBJECTIVES: The diet of tufted capuchins (Sapajus) is characterized by annual or seasonal incorporation of mechanically protected foods. Reliance on these foods raises questions about the dietary strategies of young individuals that lack strength and experience to access these resources. Previous research has demonstrated differences between the feeding competencies of adult and juvenile tufted capuchins. Here we test the hypothesis that, compare…
Manual Function in Cebus apella. Digital Mobility, Preshaping, and Endurance in Repetitive Grasping
Rare Bearded Capuchin (Sapajus libidinosus) Tool-Use Culture is Threatened by Land use Changes in Northeastern Brazil
Kinematics of bipedal locomotion while carrying a load in the arms in bearded capuchin monkeys (Sapajus libidinosus)
Introduction and integration of strangers into captive groups of tufted capuchins (Cebus apella)
Introduction and integration of strangers into captive groups of tufted capuchins (Cebus apella)
Social context and consumption of unfamiliar foods by capuchin monkeys (Cebus apella) over repeated encounters
Visalberghi and Fragaszy [Animal Behaviour 49:1089–1095, 1995] have shown that social influences affect acceptance of novel foods. However, little is known about the temporal course on which such influences act (e.g., for how long they persist and for how many encounters they are effective). To explore this issue, 11 adult tufted capuchins were observed during ten successive encounters with eight unfamiliar foods (phase 1, in which subjects were …
Social context and consumption of unfamiliar foods by capuchin monkeys (Cebus apella) over repeated encounters
Visalberghi and Fragaszy [Animal Behaviour 49:1089-1095, 1995] have shown that social influences affect acceptance of novel foods. However, little is known about the temporal course on which such influences act (e.g., for how long they persist and for how many encounters they are effective). To explore this issue, 11 adult tufted capuchins were observed during ten successive encounters with eight unfamiliar foods (phase 1, in which subjects were …
Prehension in infant capuchins (Cebus apella) from six weeks to twenty-four weeks
We analyzed the spontaneous prehensile activity of two infants living with their mothers in social groups, using videotapes taken once weekly from weeks 5 to 24. Prehensile activities were laterally symmetric. Unimanual activity predominated, although bimanual activity appeared at the same ages as unimanual activity. In most bimanual activity the two hands performed the same action, but complementary actions occurred from the onset of bimanual ac…
Manual Function in Cebus apella. Digital Mobility, Preshaping, and Endurance in Repetitive Grasping
Making space for traditions
For quite some time, the question of continuity across species with respect to culture has been linked in the academic world with definitional issues: What is culture, and how we can identify culture in a nonverbal species?1-4 Behavioral scientists agree that behavioral traditions are that aspect of culture we can study in nonhuman animals, and we recognize that traditions are widespread in the animal kingdom (reviewed in Fragaszy and Perry,5 see…
Wild capuchin monkeys ( Cebus libidinosus ) use anvils and stone pounding tools
We conducted an exploratory investigation in an area where nut‐cracking by wild capuchin monkeys is common knowledge among local residents. In addition to observing male and female capuchin monkeys using stones to pound open nuts on stone “anvils,” we surveyed the surrounding area and found physical evidence that monkeys cracked nuts on rock outcrops, boulders, and logs (collectively termed anvils). Anvils, which were identified by numerous shall…
Cross‐genus adoption of a marmoset ( Callithrix jacchus ) by wild capuchin monkeys ( Cebus libidinosus )
We report a case of interspecies adoption of an infant marmoset ( Callithrix jacchus ) by wild capuchin monkeys ( Cebus libidinosus ). The marmoset was an infant when it was first observed in the capuchin group on 3 March 2004. Since it first appeared it has been observed informally and frequently. In January 2005 systematic observations were made of the marmoset and a capuchin of similar age. Throughout its period of adoption the marmoset appear…
Distribution of potential suitable hammers and transport of hammer tools and nuts by wild capuchin monkeys
Fallback foraging as a way of life
The genus Cebus is one of the best extant models for examining the role of fallback foods in primate evolution. Cebus includes the tufted capuchins, which exhibit skeletal features for the exploitation of hard and tough foods. Paradoxically, these seemingly “specialized” taxa belong to the most ubiquitous group of closely related primates in South America, thriving in a range of different habitats. This appears to be a consequence of their abilit…
Dynamic in‐hand movements in adult and young juvenile chimpanzees ( Pan troglodytes )
Descriptions of manual function in nonhuman primates have largely focused on static precision and power grasping (as first defined by Napier, 1956 ), while identification and description of dynamic manual function are rare and incomplete. Here, we describe several forms of in‐hand movements used by chimpanzees ( Pan troglodytes ) when manipulating small objects. In‐hand movements are defined as the movement of an object within one hand via manipu…
The ontogeny of handling hard‐to‐process food in wild brown capuchins ( Cebus apella apella )
We examined age‐related differences in wild brown capuchins' foraging efficiency and the food‐processing behaviors directed toward maripa palm fruit ( Maximiliana maripa ). A detailed comparison of the different foraging techniques showed that plucking the fruit from the infructescence constituted the main difficulty of this task. Foraging efficiency tended to increase with age, with a threshold at which sufficient strength allowed immatures by t…
Stone tool use by adult wild bearded capuchin monkeys (Cebus libidinosus). Frequency, efficiency and tool selectivity
Understanding emotions in primates
In the bicentenary year of Darwin's birth, the American Society of Primatologists honored his memory by convening a symposium entitled “Understanding emotions in primates: In honor of Darwin's 200th birthday.” The four articles in this special section, excepting this introduction, derive from that symposium. The section confirms that the topic of emotion is once again, as in Darwin's lifetime, the subject of wide‐ranging, theoretically exciting r…
Infants Experience Perceptual Narrowing for Nonprimate Faces
Perceptual narrowing—a phenomenon in which perception is broad from birth, but narrows as a function of experience—has previously been tested with primate faces. In the first 6 months of life, infants can discriminate among individual human and monkey faces. Though the ability to discriminate monkey faces is lost after about 9 months, infants retain human face discrimination, presumably because of their experience with human faces. The current st…
Flexible and conservative features of social systems in tufted capuchin monkeys
Socioecological models assume that primates adapt their social behavior to ecological conditions, and predict that food availability and distribution, predation risk and risk of infanticide by males affect patterns of social organization, social structure and mating system of primates. However, adaptability and variation of social behavior may be constrained by conservative adaptations and by phylogenetic inertia. The comparative study of closely…
Kinematics of bipedal locomotion while carrying a load in the arms in bearded capuchin monkeys (Sapajus libidinosus)
Use of stone hammer tools and anvils by bearded capuchin monkeys over time and space
Kinetics of bipedal locomotion during load carrying in capuchin monkeys
The strategic role of the tail in maintaining balance while carrying a load bipedally in wild capuchins (Sapajus libidinosus)
Age‐related variation in the mechanical properties of foods processed by S apajus libidinosus
OBJECTIVES: The diet of tufted capuchins (Sapajus) is characterized by annual or seasonal incorporation of mechanically protected foods. Reliance on these foods raises questions about the dietary strategies of young individuals that lack strength and experience to access these resources. Previous research has demonstrated differences between the feeding competencies of adult and juvenile tufted capuchins. Here we test the hypothesis that, compare…
Coexistence Between Humans and Capuchins (Sapajus libidinosus)
Foraging and inter‐individual distances of bearded capuchin monkeys
Extractive foraging is a skill young capuchin monkeys learn over time. A key unknown is whether unskilled individuals occupy spatial positions that increase their opportunities to learn. We observed the spatial positions of individuals in a group of capuchin monkeys in Northeastern Brazil. To improve our understanding of the relationship between learning by young capuchin monkeys and inter-individual distance, we investigated the associations bet…
Rare Bearded Capuchin (Sapajus libidinosus) Tool-Use Culture is Threatened by Land use Changes in Northeastern Brazil
Bimanual Coordination and Right‐Hand Bias in Extractive Foraging by Wild Sapajus libidinosus
Bimanual coordination is considered a crucial factor in the evolution of manual lateralization. Experimental tasks requiring the simultaneous and coordinated use of both hands induce hand preferences at the population level across various nonhuman primate species studied in captive environments. However, to date, research investigating laterality in bimanual coordination within natural settings remains scarce, especially with respect to platyrrhi…
Primate Behavior and Ecology (23 obras) · Biology (20 obras) · Animal Vocal Communication and Behavior (14 obras) · Ecology (13 obras) · Psychology (10 obras) · Ecology (8 obras) · Zoology (8 obras) · Animal Behavior and Reproduction (7 obras) · Geography (7 obras) · Animal ecology (6 obras)