1
|
Kerman K, Roggero A, Rolando A, Palestrini C. Sexual horn dimorphism predicts the expression of active personality trait: males perform better only in the sexually horn dimorphic Onthophagus dung beetle. J ETHOL 2023. [DOI: 10.1007/s10164-023-00782-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/28/2023]
|
2
|
DePasquale C, Franklin K, Jia Z, Jhaveri K, Buderman FE. The effects of exploratory behavior on physical activity in a common animal model of human disease, zebrafish ( Danio rerio). Front Behav Neurosci 2022; 16:1020837. [PMID: 36425283 PMCID: PMC9679429 DOI: 10.3389/fnbeh.2022.1020837] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Accepted: 10/14/2022] [Indexed: 08/27/2023] Open
Abstract
Zebrafish (Danio rerio) are widely accepted as a multidisciplinary vertebrate model for neurobehavioral and clinical studies, and more recently have become established as a model for exercise physiology and behavior. Individual differences in activity level (e.g., exploration) have been characterized in zebrafish, however, how different levels of exploration correspond to differences in motivation to engage in swimming behavior has not yet been explored. We screened individual zebrafish in two tests of exploration: the open field and novel tank diving tests. The fish were then exposed to a tank in which they could choose to enter a compartment with a flow of water (as a means of testing voluntary motivation to exercise). After a 2-day habituation period, behavioral observations were conducted. We used correlative analyses to investigate the robustness of the different exploration tests. Due to the complexity of dependent behavioral variables, we used machine learning to determine the personality variables that were best at predicting swimming behavior. Our results show that contrary to our predictions, the correlation between novel tank diving test variables and open field test variables was relatively weak. Novel tank diving variables were more correlated with themselves than open field variables were to each other. Males exhibited stronger relationships between behavioral variables than did females. In terms of swimming behavior, fish that spent more time in the swimming zone spent more time actively swimming, however, swimming behavior was inconsistent across the time of the study. All relationships between swimming variables and exploration tests were relatively weak, though novel tank diving test variables had stronger correlations. Machine learning showed that three novel tank diving variables (entries top/bottom, movement rate, average top entry duration) and one open field variable (proportion of time spent frozen) were the best predictors of swimming behavior, demonstrating that the novel tank diving test is a powerful tool to investigate exploration. Increased knowledge about how individual differences in exploration may play a role in swimming behavior in zebrafish is fundamental to their utility as a model of exercise physiology and behavior.
Collapse
Affiliation(s)
- Cairsty DePasquale
- Department of Biology, Pennsylvania State University – Altoona, Altoona, PA, United States
| | - Kristina Franklin
- Department of Biology, Pennsylvania State University – Altoona, Altoona, PA, United States
| | - Zhaohan Jia
- Department of Biology, Pennsylvania State University – Altoona, Altoona, PA, United States
| | - Kavya Jhaveri
- Department of Biology, Pennsylvania State University – Altoona, Altoona, PA, United States
| | - Frances E. Buderman
- Department of Ecosystem Science and Management, Pennsylvania State University, University Park, PA, United States
| |
Collapse
|
3
|
Martin JS, Jaeggi AV. Social animal models for quantifying plasticity, assortment, and selection on interacting phenotypes. J Evol Biol 2022; 35:520-538. [PMID: 34233047 PMCID: PMC9292565 DOI: 10.1111/jeb.13900] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Revised: 05/14/2021] [Accepted: 06/24/2021] [Indexed: 11/29/2022]
Abstract
Both assortment and plasticity can facilitate social evolution, as each may generate heritable associations between the phenotypes and fitness of individuals and their social partners. However, it currently remains difficult to empirically disentangle these distinct mechanisms in the wild, particularly for complex and environmentally responsive phenotypes subject to measurement error. To address this challenge, we extend the widely used animal model to facilitate unbiased estimation of plasticity, assortment and selection on social traits, for both phenotypic and quantitative genetic (QG) analysis. Our social animal models (SAMs) estimate key evolutionary parameters for the latent reaction norms underlying repeatable patterns of phenotypic interaction across social environments. As a consequence of this approach, SAMs avoid inferential biases caused by various forms of measurement error in the raw phenotypic associations between social partners. We conducted a simulation study to demonstrate the application of SAMs and investigate their performance for both phenotypic and QG analyses. With sufficient repeated measurements, we found desirably high power, low bias and low uncertainty across model parameters using modest sample and effect sizes, leading to robust predictions of selection and adaptation. Our results suggest that SAMs will readily enhance social evolutionary research on a variety of phenotypes in the wild. We provide detailed coding tutorials and worked examples for implementing SAMs in the Stan statistical programming language.
Collapse
Affiliation(s)
- Jordan S. Martin
- Human Ecology GroupInstitute of Evolutionary MedicineUniversity of ZurichZurichSwitzerland
| | - Adrian V. Jaeggi
- Human Ecology GroupInstitute of Evolutionary MedicineUniversity of ZurichZurichSwitzerland
| |
Collapse
|
4
|
Ferreira VHB, Simoni A, Germain K, Leterrier C, Lansade L, Collin A, Mignon-Grasteau S, Le Bihan-Duval E, Guettier E, Leruste H, Løvlie H, Calandreau L, Guesdon V. Foraging Behavior Shows Individual-Consistency Over Time, and Predicts Range Use in Slow-Growing Free-Range Male Broiler Chickens. Front Vet Sci 2022; 9:814054. [PMID: 35198623 PMCID: PMC8858978 DOI: 10.3389/fvets.2022.814054] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Accepted: 01/11/2022] [Indexed: 11/13/2022] Open
Abstract
Recent research on free-range chickens shows that individual behavioral differences may link to range use. However, most of these studies explored individual behavioral differences only at one time point or during a short time window, assessed differences when animals were out of their social group and home environment (barn and range), and in specific tests or situations. Therefore, it is yet unclear how different behaviors relate to range use and how consistent these behaviors are at the individual level. To fill this gap, we here aimed to describe the behavioral budget of slow-growing male broiler chickens (S757N) when in their social group and home environment during the whole rearing period (from the second week of life to the twelfth week, before slaughter), and to relate observed behavioral differences to range use. For this, we followed a sample of individuals in two flocks (n = 60 focal chickens out of 200 chickens per flock), over two seasons, during three periods: before range access (from 14 to 25 days old), during early range access (first weeks of range access, from 37 to 53 days old), and during late range access (last weeks of range access, from 63 to 87 days old). By the end of each period, individual tests of exploration and social motivation were also performed, measuring exploration/activity and sociability propensities. Our results show that foraging (i.e., pecking and scratching at the ground) was the only behavior that correlated to range use for all three rearing periods, independent of the season. Foraging was also the only behavior that showed within-individual consistency from an early age and across the three rearing periods. Foraging may, therefore, serve as a useful behavioral predictor of range use in free-range broiler chickens. Our study increases the knowledge of how behaviors develop and relate to each other in a domesticated and intensely selected species, and improves our understanding of the biology of free-range broiler chickens. These findings can, ultimately, serve as a foundation to increase range use and improve chicken welfare.
Collapse
Affiliation(s)
- Vitor Hugo Bessa Ferreira
- JUNIA, Comportement Animal et Systèmes d'Elevage, Lille, France
- INRAE, CNRS, IFCE, Université de Tours, Centre Val de Loire UMR Physiologie de la Reproduction et des Comportements, Nouzilly, France
- Department of Physics, Chemistry and Biology, IFM Biology, Linköping University, Linköping, Sweden
- Vitor Hugo Bessa Ferreira
| | - Arthur Simoni
- JUNIA, Comportement Animal et Systèmes d'Elevage, Lille, France
| | | | - Christine Leterrier
- INRAE, CNRS, IFCE, Université de Tours, Centre Val de Loire UMR Physiologie de la Reproduction et des Comportements, Nouzilly, France
| | - Léa Lansade
- INRAE, CNRS, IFCE, Université de Tours, Centre Val de Loire UMR Physiologie de la Reproduction et des Comportements, Nouzilly, France
| | - Anne Collin
- INRAE, Université de Tours, BOA, Nouzilly, France
| | | | | | | | - Hélène Leruste
- JUNIA, Comportement Animal et Systèmes d'Elevage, Lille, France
| | - Hanne Løvlie
- Department of Physics, Chemistry and Biology, IFM Biology, Linköping University, Linköping, Sweden
| | - Ludovic Calandreau
- INRAE, CNRS, IFCE, Université de Tours, Centre Val de Loire UMR Physiologie de la Reproduction et des Comportements, Nouzilly, France
| | - Vanessa Guesdon
- JUNIA, Comportement Animal et Systèmes d'Elevage, Lille, France
- *Correspondence: Vanessa Guesdon
| |
Collapse
|
5
|
Simpson EA, Robinson LM, Paukner A. Infant rhesus macaque (Macaca mulatta) personality and subjective well-being. PLoS One 2019; 14:e0226747. [PMID: 31856210 PMCID: PMC6922351 DOI: 10.1371/journal.pone.0226747] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Accepted: 12/04/2019] [Indexed: 11/18/2022] Open
Abstract
Infant temperament is theorized to lay the foundation for adult personality; however, many questions remain regarding personality in infancy, including the number of dimensions, extent to which they are adult-like, and their relation to other outcomes, such as mental and physical health. Here we tested whether adult-like personality dimensions are already present in infancy in a nonhuman primate species. We measured personality and subjective well-being in 7-month-old rhesus macaques (N = 55) using the Hominoid Personality Questionnaire and Subjective Well-Being Questionnaire, both of which were developed for adult primates based on human measures. Multiple human raters, who provided infants with daily care since birth, independently rated each infant. We found high interrater reliability. Results from a parallel analysis and scree plot indicated a five component structure, which, using principal components analysis, we found to be comprised of dimensions relating to Openness (e.g., curiosity, inquisitive, playfulness), Assertiveness (e.g., dominance, bullying, aggressive), Anxiety (e.g., vigilance, fearful), Friendliness (e.g., sociable, affectionate, sympathetic), and Intellect (e.g., organized, not erratic). These components are largely analogous to those in adult macaques, suggesting remarkably stable structural personality components across the lifespan. Infant macaques' subjective well-being positively correlates with Openness and Assertiveness and negatively correlated with Anxiety, similar to findings in adult macaques and other primates. Together, these findings suggest that, in macaques, infant personality dimensions may be conceptually related to adult personality and challenge the view that infant temperament may be disorganized and not as meaningful as adult personality. Further research is necessary to explore the antecedents, predictive validity, and stability of these personality components across situations and with development.
Collapse
Affiliation(s)
- Elizabeth A. Simpson
- Department of Psychology, University of Miami, Coral Gables, Florida, United States of America
| | - Lauren M. Robinson
- Konrad Lorenz Institute of Ethology, University of Veterinary Medicine Vienna, Vienna, Austria
- Language Research Center, Georgia State University, Atlanta, Georgia, United States of America
| | - Annika Paukner
- Department of Psychology, Nottingham Trent University, Nottingham, England, United Kingdom
| |
Collapse
|
6
|
Blaszczyk MB. Primates got personality, too: Toward an integrative primatology of consistent individual differences in behavior. Evol Anthropol 2019; 29:56-67. [PMID: 31721372 DOI: 10.1002/evan.21808] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Revised: 06/24/2019] [Accepted: 10/08/2019] [Indexed: 12/22/2022]
Abstract
In recent years, research on animal personality has exploded within the field of behavioral ecology. Consistent individual differences in behavior exist in a wide range of species, and these differences can have fitness consequences and influence several aspects of a species' ecology. In comparison to studies of other animals, however, there has been relatively little research on the behavioral ecology of primate personality. This is surprising given the large body of research within psychology and biomedicine showing that primate personality traits are heritable and linked to health and life history outcomes. In this article, I bring together theoretical perspectives on the ecology and evolution of animal personality with an integrative review of what we know about primate personality from studies conducted on captive, free-ranging, and wild primates. Incorporating frameworks that emphasize consistency in behavior into primate behavioral ecology research holds promise for improving our understanding of primate behavioral evolution.
Collapse
|
7
|
Developing individual differences in primate behavior: the role of genes, environment, and their interplay. Behav Ecol Sociobiol 2019. [DOI: 10.1007/s00265-019-2633-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
|
8
|
Weiss A. A human model for primate personality. Proc Biol Sci 2018; 284:rspb.2017.1129. [PMID: 29021170 DOI: 10.1098/rspb.2017.1129] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2017] [Accepted: 09/04/2017] [Indexed: 12/13/2022] Open
Abstract
In this article, I review the literature to determine how successful the latent trait theory model of personality from differential psychology has been for studying personality in non-human primates. The evidence for the success of this model is quite good, and offers insights and directions for personality research in primates and other animals. This, I conclude, stems from (i) the human trait model's simplicity, and (ii) the fact that the human differential model of personality developed in the face of harsh criticism, which led researchers to test and refine their models.
Collapse
Affiliation(s)
- Alexander Weiss
- Department of Psychology, School of Philosophy, Psychology and Language Sciences, The University of Edinburgh, 7 George Square, Edinburgh EH8 9JZ, UK
| |
Collapse
|
9
|
Langenhof MR, Komdeur J. Why and how the early-life environment affects development of coping behaviours. Behav Ecol Sociobiol 2018; 72:34. [PMID: 29449757 PMCID: PMC5805793 DOI: 10.1007/s00265-018-2452-3] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Revised: 01/19/2018] [Accepted: 01/25/2018] [Indexed: 01/02/2023]
Abstract
Understanding the ways in which individuals cope with threats, respond to challenges, make use of opportunities and mediate the harmful effects of their surroundings is important for predicting their ability to function in a rapidly changing world. Perhaps one of the most essential drivers of coping behaviour of adults is the environment experienced during their early-life development. Although the study of coping, defined as behaviours displayed in response to environmental challenges, has a long and rich research history in biology, recent literature has repeatedly pointed out that the processes through which coping behaviours develop in individuals are still largely unknown. In this review, we make a move towards integrating ultimate and proximate lines of coping behaviour research. After broadly defining coping behaviours (1), we review why, from an evolutionary perspective, the development of coping has become tightly linked to the early-life environment (2), which relevant developmental processes are most important in creating coping behaviours adjusted to the early-life environment (3), which influences have been shown to impact those developmental processes (4) and what the adaptive significance of intergenerational transmission of coping behaviours is, in the context of behavioural adaptations to a fast changing world (5). Important concepts such as effects of parents, habitat, nutrition, social group and stress are discussed using examples from empirical studies on mammals, fish, birds and other animals. In the discussion, we address important problems that arise when studying the development of coping behaviours and suggest solutions.
Collapse
Affiliation(s)
- M. Rohaa Langenhof
- Behavioural Physiology and Ecology Group, Groningen Institute for Evolutionary Life Sciences, University of Groningen, Groningen, Netherlands
| | - Jan Komdeur
- Behavioural Physiology and Ecology Group, Groningen Institute for Evolutionary Life Sciences, University of Groningen, Groningen, Netherlands
| |
Collapse
|
10
|
Martin JS, Suarez SA. Personality assessment and model comparison with behavioral data: A statistical framework and empirical demonstration with bonobos (Pan paniscus
). Am J Primatol 2017; 79. [DOI: 10.1002/ajp.22670] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2016] [Revised: 02/08/2017] [Accepted: 03/24/2017] [Indexed: 12/27/2022]
Affiliation(s)
- Jordan S. Martin
- Department of Anthropology; Emory University; Atlanta Georgia
- Department of Anthropology; Miami University; Oxford Ohio
- Department of Cognitive Biology; University of Vienna; Vienna Austria
| | - Scott A. Suarez
- Department of Anthropology; Miami University; Oxford Ohio
- Department of Behavioral Sciences; San Diego Mesa College; San Diego California
| |
Collapse
|
11
|
Roelofs S, Boleij H, Nordquist RE, van der Staay FJ. Making Decisions under Ambiguity: Judgment Bias Tasks for Assessing Emotional State in Animals. Front Behav Neurosci 2016; 10:119. [PMID: 27375454 PMCID: PMC4899464 DOI: 10.3389/fnbeh.2016.00119] [Citation(s) in RCA: 129] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Accepted: 05/25/2016] [Indexed: 11/13/2022] Open
Abstract
Judgment bias tasks (JBTs) are considered as a family of promising tools in the assessment of emotional states of animals. JBTs provide a cognitive measure of optimism and/or pessimism by recording behavioral responses to ambiguous stimuli. For instance, a negative emotional state is expected to produce a negative or pessimistic judgment of an ambiguous stimulus, whereas a positive emotional state produces a positive or optimistic judgment of the same ambiguous stimulus. Measuring an animal's emotional state or mood is relevant in both animal welfare research and biomedical research. This is reflected in the increasing use of JBTs in both research areas. We discuss the different implementations of JBTs with animals, with a focus on their potential as an accurate measure of emotional state. JBTs have been successfully applied to a very broad range of species, using many different types of testing equipment and experimental protocols. However, further validation of this test is deemed necessary. For example, the often extensive training period required for successful judgment bias testing remains a possible factor confounding results. Also, the issue of ambiguous stimuli losing their ambiguity with repeated testing requires additional attention. Possible improvements are suggested to further develop the JBTs in both animal welfare and biomedical research.
Collapse
Affiliation(s)
- Sanne Roelofs
- Department of Farm Animal Health, Faculty of Veterinary Medicine, Behavior and Welfare Group (Formerly Emotion and Cognition Group), Utrecht University Utrecht, Netherlands
| | - Hetty Boleij
- Department of Animals in Science and Society, Faculty of Veterinary Medicine, Division of Laboratory Animal Science, Utrecht UniversityUtrecht, Netherlands; Brain Center Rudolf Magnus, Utrecht UniversityUtrecht, Netherlands
| | - Rebecca E Nordquist
- Department of Farm Animal Health, Faculty of Veterinary Medicine, Behavior and Welfare Group (Formerly Emotion and Cognition Group), Utrecht UniversityUtrecht, Netherlands; Brain Center Rudolf Magnus, Utrecht UniversityUtrecht, Netherlands
| | - Franz Josef van der Staay
- Department of Farm Animal Health, Faculty of Veterinary Medicine, Behavior and Welfare Group (Formerly Emotion and Cognition Group), Utrecht UniversityUtrecht, Netherlands; Brain Center Rudolf Magnus, Utrecht UniversityUtrecht, Netherlands
| |
Collapse
|
12
|
Effect of predation threat on repeatability of individual crab behavior revealed by mark-recapture. Behav Ecol Sociobiol 2013. [DOI: 10.1007/s00265-013-1666-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/29/2022]
|
13
|
Neumann C, Agil M, Widdig A, Engelhardt A. Personality of wild male crested macaques (Macaca nigra). PLoS One 2013; 8:e69383. [PMID: 23940517 PMCID: PMC3734184 DOI: 10.1371/journal.pone.0069383] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2013] [Accepted: 06/09/2013] [Indexed: 11/28/2022] Open
Abstract
Animal personalities, i.e. consistent differences in behavior across time and/or context, have received increased attention of behavioral biologists over the last years. Recent research shows that personalities represent traits on which natural and sexual selection work and which can have substantial fitness consequences. The aim of this study is to establish the personality structure of crested macaque (Macaca nigra) males as foundation for future studies on its adaptive value. We collected behavioral data through focal animal sampling and additionally conducted two sets of playback experiments. Results of a factor analysis on the behavioral data revealed a four factor structure with components we labeled Anxiety, Sociability, Connectedness and Aggressiveness. Results from the experiments revealed an additional and independent Boldness factor but the absence of Neophilia. Overall, this structure resembles other macaque and animal species with the exception of Connectedness, which might be a consequence of the species' tolerant social style. Our results thus not only form the basis for future studies on the adaptive value of personality in crested macaques but also contribute an important data point for investigating the evolution of personality structure from a comparative perspective by refining, for example, which personality factors characterized the last common ancestor of hominids and macaques.
Collapse
Affiliation(s)
- Christof Neumann
- Junior Research Group of Primate Sexual Selection, German Primate Center, Göttingen, Germany.
| | | | | | | |
Collapse
|
14
|
Massen JJM, Antonides A, Arnold AMK, Bionda T, Koski SE. A behavioral view on chimpanzee personality: exploration tendency, persistence, boldness, and tool-orientation measured with group experiments. Am J Primatol 2013; 75:947-58. [PMID: 23649750 DOI: 10.1002/ajp.22159] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2012] [Revised: 03/25/2013] [Accepted: 04/07/2013] [Indexed: 12/31/2022]
Abstract
Human and nonhuman animals show personality: temporal and contextual consistency in behavior patterns that vary among individuals. In contrast to most other species, personality of chimpanzees, Pan troglodytes, has mainly been studied with non-behavioral methods. We examined boldness, exploration tendency, persistence and tool-orientation in 29 captive chimpanzees using repeated experiments conducted in an ecologically valid social setting. High temporal repeatability and contextual consistency in all these traits indicated they reflected personality. In addition, Principal Component Analysis revealed two independent syndromes, labeled exploration-persistence and boldness. We found no sex or rank differences in the trait scores, but the scores declined with age. Nonetheless, there was considerable inter-individual variation within age-classes, suggesting that behavior was not merely determined by age but also by dispositional effects. In conclusion, our study complements earlier rating studies and adds new traits to the chimpanzee personality, thereby supporting the existence of multiple personality traits among chimpanzees. We stress the importance of ecologically valid behavioral research to assess multiple personality traits and their association, as it allows inclusion of ape studies in the comparison of personality structures across species studied behaviorally, and furthers our attempts to unravel the causes and consequences of animal personality.
Collapse
Affiliation(s)
- Jorg J M Massen
- Department of Cognitive Biology, University of Vienna, Vienna, Austria.
| | | | | | | | | |
Collapse
|
15
|
Hori Y, Kishi H, Inoue-Murayama M, Fujita K. Dopamine receptor D4 gene (DRD4) is associated with gazing toward humans in domestic dogs (<i>Canis familiaris</i>). ACTA ACUST UNITED AC 2013. [DOI: 10.4236/ojas.2013.31008] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
16
|
Carter AJ, Feeney WE, Marshall HH, Cowlishaw G, Heinsohn R. Animal personality: what are behavioural ecologists measuring? Biol Rev Camb Philos Soc 2012; 88:465-75. [PMID: 23253069 DOI: 10.1111/brv.12007] [Citation(s) in RCA: 425] [Impact Index Per Article: 35.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2012] [Revised: 11/07/2012] [Accepted: 11/20/2012] [Indexed: 11/30/2022]
Abstract
The discovery that an individual may be constrained, and even behave sub-optimally, because of its personality type has fundamental implications for understanding individual- to group-level processes. Despite recent interest in the study of animal personalities within behavioural ecology, the field is fraught with conceptual and methodological difficulties inherent in any young discipline. We review the current agreement of definitions and methods used in personality studies across taxa and systems, and find that current methods risk misclassifying traits. Fortunately, these problems have been faced before by other similar fields during their infancy, affording important opportunities to learn from past mistakes. We review the tools that were developed to overcome similar methodological problems in psychology. These tools emphasise the importance of attempting to measure animal personality traits using multiple tests and the care that needs to be taken when interpreting correlations between personality traits or their tests. Accordingly, we suggest an integrative theoretical framework that incorporates these tools to facilitate a robust and unified approach in the study of animal personality.
Collapse
Affiliation(s)
- Alecia J Carter
- The Fenner School of Environment and Society, The Australian National University, Canberra, ACT 0200, Australia.
| | | | | | | | | |
Collapse
|
17
|
Kutsukake N, Teramoto M, Homma S, Mori Y, Matsudaira K, Kobayashi H, Ishida T, Okanoya K, Hasegawa T. Individual Variation in Behavioural Reactions to Unfamiliar Conspecific Vocalisation and Hormonal Underpinnings in Male Chimpanzees. Ethology 2011. [DOI: 10.1111/j.1439-0310.2011.02009.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
18
|
Koski SE. Social personality traits in chimpanzees: temporal stability and structure of behaviourally assessed personality traits in three captive populations. Behav Ecol Sociobiol 2011. [DOI: 10.1007/s00265-011-1224-0] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
|