J B Leca
Biographic Data
| ID | 55270 |
|---|---|
| NAME | J B Leca |
| GIVEN NAMES | J B |
| FAMILY NAME | Leca |
| SIGNATURE | LECA J B |
| AFFILIATIONS | University of Lethbridge |
| ORCID | 0000-0002-2371-671X |
| VERIFIED | Yes |
| TOTAL WORKS | 28 |
| TOTAL CITATIONS | 47 |
| AUTHOR COUNT | 28 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 2002 |
| LATEST PUBLICATION YEAR | 2026 |
| H-INDEX | 4 |
Valuing Behavioral By‐Products
After challenging the view that cultural processes mainly produce behavioral adaptations, we urge researchers to adopt a pluralistic view on Darwinian evolution by emphasizing the diversity and importance of evolutionary by‐products and highlighting the heuristic merit of concepts such as behavioral spandrels and exaptations, particularly in the domain of cultural evolution in primates. We then use the concept of the “structure‐function interface…
Early sex differences in sociosexual behavior of wild robust capuchin monkeys
Monkey-deer rodeo
Carrying the dead
Self-handicapping in object play
Although observed in animals from various taxa, object play is not well studied. While studying object play in managed care belugas (Delphinapterus leucas), we noticed that, in some cases, the belugas self-handicap their play. For example, a beluga may push a ball onto a ledge, so that the object can only be reached by the beluga beaching itself. Self-handicapping has been described in locomotor and social play, but is rarely, if ever, reported i…
The exaptive potential of (object) play behavior
There are many adaptationist hypotheses and non-selectionist accounts for the evolution of play. Some scholars argued that, 'primary-process play' originally arose as a by-product of fortuitous conditions, adaptive or not (e.g. high metabolic energy, boredom). Once evolved, these basic playful behavioral elements, characterized by some quirkiness, arbitrariness, redundancy, flexibility, and latent potential, may serve as a built-in reservoir of c…
When males have females on their backs
Previous research on Japanese macaques has shown that female‐to‐male mounting (FMM) is performed by some females as an exaggerated form of sexual solicitation that may occur in the context of high female competition for male mates. This supernormal courtship behavior functions to prompt subsequent male‐to‐female mounting. In this report, we focused on the male consort partners' responses to FMM. We studied a free‐ranging population of Japanese ma…
By-Products of Adaptations
Evolutionary By-Products
Intergroup variation in robbing and bartering by long-tailed macaques at Uluwatu Temple (Bali, Indonesia)
A multidisciplinary view on cultural primatology
Comparative Evidence
Influence of sexual competition and social context on homosexual behavior in adolescent female Japanese macaques
We explored the role that sexual and social partners play in the expression of female homosexual behavior among adolescent female Japanese macaques at Arashiyama, Japan. Our data fully or partially supported all the predictions related to four non-mutually exclusive hypotheses, namely the "adult male disinterest in adolescent females" hypothesis, the "numerous homosexual adult females" hypothesis, the "safer homosexual interactions" hypothesis an…
Comparative Development of Heterosexual and Homosexual Behaviors in Free-Ranging Female Japanese Macaques
Effect of Female-Biased Sex Ratios on Female Homosexual Behavior in Japanese Macaques
The “female fertility–social stratification–hypergyny” hypothesis of male homosexual preference
Male Homosexual Behavior in a Free-Ranging All-Male Group of Japanese Macaques at Minoo, Japan
Approche intégrée des comportements culturels
Dans la quête d’explications culturelles ou de propositions alternatives pour rendre compte de l’existence de variations comportementales entre des groupes de la même espèce, seule une approche intégrée, prenant en compte différentes perspectives et incorporant des types d’analyses complémentaires, permet d’établir la preuve de l’existence d’une forme de culture. L’objectif de cet article est de démontrer comment des études comparatives, longitud…
The first case of dental flossing by a Japanese macaque (Macaca fuscata)
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…
Principles and levels of laterality in unimanual and bimanual stone handling patterns by Japanese macaques
Food provisioning and stone handling tradition in Japanese macaques
By addressing the influence of food provisioning on stone handling (SH), a behavioral tradition in Japanese macaques, this study contributes to the ongoing debate in cultural primatology by asking whether human intervention influences the emergence or propagation of behavioral traditions. SH is a form of object play consisting of the manipulation of stones by performing various behavioral patterns. We tested the hypothesis that the frequency of f…
Of stones and monkeys
Japanese macaques are known to manipulate stones by displaying various seemingly functionless behavioral patterns, including carrying a stone, rubbing two stones together, or gathering several stones into a pile. This form of solitary object play called stone handling (SH) is a behavioral tradition in Japanese macaques, showing striking intertroop differences in frequency and form. Here, we evaluated two ecologically based hypotheses invoked to a…
Stone-throwing by Japanese macaques
A new case of fish‐eating in Japanese macaques
This is the first detailed report of social factors affecting fish‐eating in Japanese macaques under natural circumstances. We video‐recorded a complete event of fish eating, involving a new fish food species for the monkeys on Koshima island. Following the discovery of a large beached sea bass by a peripheral male, we observed a total of 16 individuals feeding on the fish in turns, and interacting around it. The rank order of access to the fish …
Aggression and Reconciliation in Cebus capucinus
Male Homosexual Behavior in a Free-Ranging All-Male Group of Japanese Macaques at Minoo, Japan
Stone-throwing by Japanese macaques
Age-related differences in the performance, diffusion, and maintenance of stone handling, a behavioral tradition in Japanese macaques
Comparative Development of Heterosexual and Homosexual Behaviors in Free-Ranging Female Japanese Macaques
Of stones and monkeys
Japanese macaques are known to manipulate stones by displaying various seemingly functionless behavioral patterns, including carrying a stone, rubbing two stones together, or gathering several stones into a pile. This form of solitary object play called stone handling (SH) is a behavioral tradition in Japanese macaques, showing striking intertroop differences in frequency and form. Here, we evaluated two ecologically based hypotheses invoked to a…
Social Aspects of Fur-rubbing in Cebus capucinus and C. apella
Principles and levels of laterality in unimanual and bimanual stone handling patterns by Japanese macaques
Effect of Female-Biased Sex Ratios on Female Homosexual Behavior in Japanese Macaques
Approche intégrée des comportements culturels
Dans la quête d’explications culturelles ou de propositions alternatives pour rendre compte de l’existence de variations comportementales entre des groupes de la même espèce, seule une approche intégrée, prenant en compte différentes perspectives et incorporant des types d’analyses complémentaires, permet d’établir la preuve de l’existence d’une forme de culture. L’objectif de cet article est de démontrer comment des études comparatives, longitud…
Aggression and Reconciliation in Cebus capucinus
A new case of fish‐eating in Japanese macaques
This is the first detailed report of social factors affecting fish‐eating in Japanese macaques under natural circumstances. We video‐recorded a complete event of fish eating, involving a new fish food species for the monkeys on Koshima island. Following the discovery of a large beached sea bass by a peripheral male, we observed a total of 16 individuals feeding on the fish in turns, and interacting around it. The rank order of access to the fish …
Social Aspects of Fur-rubbing in Cebus capucinus and C. apella
Age-related differences in the performance, diffusion, and maintenance of stone handling, a behavioral tradition in Japanese macaques
Food provisioning and stone handling tradition in Japanese macaques
By addressing the influence of food provisioning on stone handling (SH), a behavioral tradition in Japanese macaques, this study contributes to the ongoing debate in cultural primatology by asking whether human intervention influences the emergence or propagation of behavioral traditions. SH is a form of object play consisting of the manipulation of stones by performing various behavioral patterns. We tested the hypothesis that the frequency of f…
Of stones and monkeys
Japanese macaques are known to manipulate stones by displaying various seemingly functionless behavioral patterns, including carrying a stone, rubbing two stones together, or gathering several stones into a pile. This form of solitary object play called stone handling (SH) is a behavioral tradition in Japanese macaques, showing striking intertroop differences in frequency and form. Here, we evaluated two ecologically based hypotheses invoked to a…
Stone-throwing by Japanese macaques
The first case of dental flossing by a Japanese macaque (Macaca fuscata)
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…
Principles and levels of laterality in unimanual and bimanual stone handling patterns by Japanese macaques
Approche intégrée des comportements culturels
Dans la quête d’explications culturelles ou de propositions alternatives pour rendre compte de l’existence de variations comportementales entre des groupes de la même espèce, seule une approche intégrée, prenant en compte différentes perspectives et incorporant des types d’analyses complémentaires, permet d’établir la preuve de l’existence d’une forme de culture. L’objectif de cet article est de démontrer comment des études comparatives, longitud…
The “female fertility–social stratification–hypergyny” hypothesis of male homosexual preference
Male Homosexual Behavior in a Free-Ranging All-Male Group of Japanese Macaques at Minoo, Japan
Influence of sexual competition and social context on homosexual behavior in adolescent female Japanese macaques
We explored the role that sexual and social partners play in the expression of female homosexual behavior among adolescent female Japanese macaques at Arashiyama, Japan. Our data fully or partially supported all the predictions related to four non-mutually exclusive hypotheses, namely the "adult male disinterest in adolescent females" hypothesis, the "numerous homosexual adult females" hypothesis, the "safer homosexual interactions" hypothesis an…
Comparative Development of Heterosexual and Homosexual Behaviors in Free-Ranging Female Japanese Macaques
Effect of Female-Biased Sex Ratios on Female Homosexual Behavior in Japanese Macaques
A multidisciplinary view on cultural primatology
Comparative Evidence
Intergroup variation in robbing and bartering by long-tailed macaques at Uluwatu Temple (Bali, Indonesia)
By-Products of Adaptations
Evolutionary By-Products
When males have females on their backs
Previous research on Japanese macaques has shown that female‐to‐male mounting (FMM) is performed by some females as an exaggerated form of sexual solicitation that may occur in the context of high female competition for male mates. This supernormal courtship behavior functions to prompt subsequent male‐to‐female mounting. In this report, we focused on the male consort partners' responses to FMM. We studied a free‐ranging population of Japanese ma…
Self-handicapping in object play
Although observed in animals from various taxa, object play is not well studied. While studying object play in managed care belugas (Delphinapterus leucas), we noticed that, in some cases, the belugas self-handicap their play. For example, a beluga may push a ball onto a ledge, so that the object can only be reached by the beluga beaching itself. Self-handicapping has been described in locomotor and social play, but is rarely, if ever, reported i…
The exaptive potential of (object) play behavior
There are many adaptationist hypotheses and non-selectionist accounts for the evolution of play. Some scholars argued that, 'primary-process play' originally arose as a by-product of fortuitous conditions, adaptive or not (e.g. high metabolic energy, boredom). Once evolved, these basic playful behavioral elements, characterized by some quirkiness, arbitrariness, redundancy, flexibility, and latent potential, may serve as a built-in reservoir of c…
Monkey-deer rodeo
Primate Behavior and Ecology (23 works) · Biology (21 works) · Psychology (19 works) · Animal Vocal Communication and Behavior (16 works) · Animal Behavior and Reproduction (13 works) · Zoology (11 works) · Demography (8 works) · Animal ecology (7 works) · Developmental psychology (7 works) · Social Psychology (7 works)