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| Author | Reddon, A.R.; Hurd, P.L. | ||||
| Title | Acting unilaterally: Why do animals with strongly lateralized brains behave differently than those with weakly lateralized brains? | Type | Journal Article | ||
| Year | 2009 | Publication  |
Bioscience Hypotheses | Abbreviated Journal | |
| Volume | 2 | Issue | 6 | Pages | 383-387 |
| Keywords | Cerebral lateralization; Individual variation; Personality; Habenula; Dorsal-diencephalic conduction system | ||||
| Abstract | Cerebral lateralization was once thought to be unique to humans, but is now known to be widespread among the vertebrates. Lateralization appears to confer cognitive advantages upon those that possess it. Despite the taxonomic ubiquity and described advantages of lateralization, substantial individual variation exists in all species. Individual variation in cerebral lateralization may be tied to individual variation in behaviour and the selective forces that act to maintain variation in behaviour may also act to maintain variation in lateralization. The mechanisms linking individual variation in the strength of cerebral lateralization to individual variation in behaviour remain obscure. We propose here a general hypothesis which may help to explain this link. We suggest that individuals with strong and weak lateralizations behave differently because of differences in the ability of one hemisphere to inhibit the functions of the other in each type of brain organization. We also suggest a specific mechanism involving the asymmetric epithalamic nucleus, the habenula. We conclude by discussing some predictions and potential tests of our hypothesis. | ||||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 1756-2392 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Equine Behaviour @ team @ | Serial | 5417 | ||
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| Author | Hoff, M.P.; Nadler, R.D.; Maple, T.L. | ||||
| Title | Development of infant independence in a captive group of lowland gorillas | Type | Journal Article | ||
| Year | 1981 | Publication |
Developmental Psychobiology | Abbreviated Journal | Dev Psychobiol |
| Volume | 14 | Issue | 3 | Pages | 251-265 |
| Keywords | Animals; *Dependency (Psychology); Female; Gorilla gorilla/*growth & development; Male; Maternal Behavior; *Personality; Sex Factors; Social Behavior; Weaning | ||||
| Abstract | In March 1976, 3 lowlands gorillas (Gorilla gorilla gorilla) were born to primiparous females living with an adult male in a large compound at the field station of the Yerkes Regional Primate Research Center of Emory University. Observations of parent and infant behavior began at the birth of the infants, using several methods of data collection. This report focuses on the development of independence in these infants over the 1st 1 1/2 years of life. As expected, measures of mother-infant contact and proximity decreased with age. Several measures suggested that infant independence developed as an interactive process between mothers and infants, with primary responsibility changing over the months of study. Maternal behaviors that served to maintain mother-infant contact were found to decrease with age, with an eventual shift to infant responsibility for contact maintenance. Additionally, the adult male appeared to influence developing independence as reflected in the maternal protectiveness evoked by his behavior. | ||||
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| Language | English | Summary Language | Original Title | ||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 0012-1630 | ISBN | Medium | ||
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| Notes | PMID:7262467 | Approved | no | ||
| Call Number | Equine Behaviour @ team @ | Serial | 4170 | ||
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| Author | Stober, M.; Geiger, J.F. | ||||
| Title | [Lamenting “moaning” in domestic cattle] | Type | Journal Article | ||
| Year | 1975 | Publication |
DTW. Deutsche Tierarztliche Wochenschrift | Abbreviated Journal | Dtsch Tierarztl Wochenschr |
| Volume | 82 | Issue | 1 | Pages | 10-13 |
| Keywords | Animals; Behavior, Animal; *Cattle; Female; Personality; *Vocalization, Animal | ||||
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| Language | German | Summary Language | Original Title | Untersuchungen uber das klagende “Anken” beim Hausrind | |
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| ISSN | 0341-6593 | ISBN | Medium | ||
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| Notes | PMID:1089525 | Approved | no | ||
| Call Number | Equine Behaviour @ team @ | Serial | 4173 | ||
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| Author | Dall, Sasha R. X; Houston, Alasdair I.; McNamara, John M. | ||||
| Title | The behavioural ecology of personality: consistent individual differences from an adaptive perspective | Type | Journal Article | ||
| Year | 2004 | Publication |
Ecology Letters | Abbreviated Journal | Ecol. Letters |
| Volume | 7 | Issue | Pages | 734-739 | |
| Keywords | Adaptive individual differences, behavioural ecology, behavioural syndromes, evolutionary game theory, life history strategies, personality differences, state-dependent dynamic programming | ||||
| Abstract | Individual humans, and members of diverse other species, show consistent differences in aggressiveness, shyness, sociability and activity. Such intraspecific differences in behaviour have been widely assumed to be non-adaptive variation surrounding (possibly) adaptive population-average behaviour. Nevertheless, in keeping with recent calls to apply Darwinian reasoning to ever-finer scales of biological variation, we sketch the fundamentals of an adaptive theory of consistent individual differences in behaviour. Our thesis is based on the notion that such .personality differences. can be selected for if fitness payoffs are dependent on both the frequencies with which competing strategies are played and an individual`s behavioural history. To this end, we review existing models that illustrate this and propose a game theoretic approach to analyzing personality differences that is both dynamic and state-dependent. Our motivation is to provide insights into the evolution and maintenance of an apparently common animal trait: personality, which has far reaching ecological and evolutionary implications. |
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| Notes | Approved | no | |||
| Call Number | refbase @ user @ | Serial | 494 | ||
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| Author | Stamps, J.A. | ||||
| Title | Growth-mortality tradeoffs and 'personality traits' in animals | Type | Journal Article | ||
| Year | 2007 | Publication |
Ecology Letters | Abbreviated Journal | Ecol Lett |
| Volume | 10 | Issue | 5 | Pages | 355-363 |
| Keywords | Animals; Behavior, Animal; *Growth; *Mortality; *Personality | ||||
| Abstract | Consistent individual differences in boldness, reactivity, aggressiveness, and other 'personality traits' in animals are stable within individuals but vary across individuals, for reasons which are currently obscure. Here, I suggest that consistent individual differences in growth rates encourage consistent individual differences in behavior patterns that contribute to growth-mortality tradeoffs. This hypothesis predicts that behavior patterns that increase both growth and mortality rates (e.g. foraging under predation risk, aggressive defense of feeding territories) will be positively correlated with one another across individuals, that selection for high growth rates will increase mean levels of potentially risky behavior across populations, and that within populations, faster-growing individuals will take more risks in foraging contexts than slower-growing individuals. Tentative empirical support for these predictions suggests that a growth-mortality perspective may help explain some of the consistent individual differences in behavioral traits that have been reported in fish, amphibians, reptiles, and other animals with indeterminate growth. | ||||
| Address | University of California, Davis, Davis, CA 95616, USA. jastamps@ucdavis.edu | ||||
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| Language | English | Summary Language | Original Title | ||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 1461-0248 | ISBN | Medium | ||
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| Notes | PMID:17498134 | Approved | no | ||
| Call Number | Equine Behaviour @ team @ | Serial | 4100 | ||
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| Author | Visser, E.K.; Van Reenen, C.G.; Rundgren, M.; Zetterqvist, M.; Morgan, K.; Blokhuis, H.J. | ||||
| Title | Responses of horses in behavioural tests correlate with temperament assessed by riders | Type | Journal Article | ||
| Year | 2003 | Publication |
Equine Veterinary Journal | Abbreviated Journal | Equine Vet J |
| Volume | 35 | Issue | 2 | Pages | 176-183 |
| Keywords | Adult; Animals; *Behavior, Animal/physiology; Data Interpretation, Statistical; Female; *Handling (Psychology); Heart Rate/*physiology; Horses/physiology/*psychology; Humans; Male; Personality; Temperament/*physiology | ||||
| Abstract | REASONS FOR PERFORMING STUDY: Behavioural tests as well as observers' ratings have been used to study horses' temperament. However, the relationship between the ratings and the responses in behavioural tests has not yet been studied in detail. OBJECTIVES: The aim of the present study was to examine this relationship between ratings and responses. METHODS: Eighteen mature Swedish Warmblood horses were subjected to 2 behavioural tests, one relating to novelty (novel object test) and one to handling (handling test). Subsequently, 16 of these horses were ridden by 16 equally experienced students, having no former experience with the horses. Immediately after each ride, the students scored the horse for 10 temperamental traits using a line rating method. RESULTS: It was shown that for each temperamental trait all 16 riders agreed on the ranking of the horses (0.212<W<0.505, P < 0.001). CONCLUSIONS: Correlations between behavioural and heart rate variables in the behavioural tests revealed that horses with a high level of locomotion or much restlessness behaviour exhibited high mean heart rate and low heart rate variability. In particular, heart rate variables in the behavioural tests were found to correlate with riders' rating scores. Furthermore, the underlying components of the handling test, retrieved with a principal component analysis (PCA) correlated with riders' rating scores while the underlying components of the novel object test did not. POTENTIAL CLINICAL RELEVANCE: It is concluded that it is possible for a large panel of assessors to agree upon a horse's temperament and that objective measures from behavioural tests correlate significantly with temperamental traits assessed by a panel of assessors. | ||||
| Address | Department of Equine Sciences, Faculty of Veterinary Medicine, Utrecht University, PO Box 80.163, NL-3508 TD Utrecht, The Netherlands | ||||
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| Language | English | Summary Language | Original Title | ||
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| ISSN | 0425-1644 | ISBN | Medium | ||
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| Notes | PMID:12638795 | Approved | no | ||
| Call Number | Serial | 1906 | |||
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| Author | Mills, D.S. | ||||
| Title | Personality and individual differences in the horse, their significance, use and measurement | Type | Journal Article | ||
| Year | 1998 | Publication |
Equine Veterinary Journal. Supplement | Abbreviated Journal | Equine Vet J Suppl |
| Volume | Issue | 27 | Pages | 10-13 | |
| Keywords | Animals; *Behavior, Animal; Horses/*psychology; Personality | ||||
| Abstract | The biological diversity of a species gives rise to individual differences in behavioural tendency. Traditionally, this variation has been considered to be of little scientific importance or value, but the description and quantification of the fundamental basis of this variability is relevant to many aspects of equine science. The reliable identification of these features may allow the development of more accurate diagnostic and prognostic indicators for a range of clinical diseases. Biologically based traits also provide a more rational basis for selective management and breeding programmes in which specific behavioural tendencies are sought. Individual differences in behaviour also reflect the range of subjective feelings experienced by animals and therefore need to be understood by those concerned with animal welfare. Psychometric techniques concerned with the assessment of personality may provide a suitable basis for scientific study in this field. Potentially methodologies include: behavioural tests, objective behaviour measures or the quantification of reports from those familiar with the subjects. The assessment of the validity and reliability of the variables measured in these tests is an integral part of their development. Interobserver correlation in an experiment based on the subjective rating of 20 horses with respect to 14 familiar terms used to describe horse personality was generally low. This suggests that, with the exception of the terms 'flighty' and 'sharp', the empirical terminology commonly used to describe horse personality is unreliable. | ||||
| Address | De Montfort University Lincoln, School of Agriculture and Horticulture, Caythorpe, Lincs, UK | ||||
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| Notes | PMID:10484996 | Approved | no | ||
| Call Number | refbase @ user @ | Serial | 1932 | ||
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| Author | Sone, K. | ||||
| Title | [Apropos of 5 cases of so-called “delusions of cutaneous and intestinal infestation”--psychopathologic and neuropsychological considerations] | Type | Journal Article | ||
| Year | 1983 | Publication |
Folia Psychiatrica et Neurologica Japonica | Abbreviated Journal | Folia Psychiatr Neurol Jpn |
| Volume | 37 | Issue | 1 | Pages | 37-55 |
| Keywords | Adult; Aged; Agnosia/complications; Attitude to Health; Delusions/complications/etiology/*psychology; Female; Humans; Intestines; Male; Middle Aged; Personality; Psychotherapy; *Sensation; Skin | ||||
| Abstract | Five cases with so-called “Dermato- und Enterozoenwahn” are reported, and the following themes are analysed from the “multidimensional” point of view: 1) process to build the shape of the intruder which is bothering the patients, 2) behavior against the intruding small animal and attitude towards the therapeutist; their characteristic manner to make complaints, 3) premorbid personality and 4) physical findings. In regard to one of the formation types of this disease, we have postulated through the neuropsychological analysis of case 5 (somatoparaphrenic patient) that patients of the typical cases 1, 2 and 3 suffer from a special kind of agnosia (perturbation of recognition; disturbance of aperception) in which they take their abnormal body sensations for causing by the small imaginary animals. Our cases showed the importance of a premorbid personality and present life-situations in combination with physical dissolution taking part in the pathoplastic process of this particular disease. | ||||
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| Language | German | Summary Language | Original Title | Uber funf Falle von sogenanntem “Dermato- und Enterozoenwahn”--psychopathologische und neuropsychologische Betrachtungen | |
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| Series Volume | Series Issue | Edition | |||
| ISSN | 0015-5721 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | PMID:6884912 | Approved | no | ||
| Call Number | Equine Behaviour @ team @ | Serial | 4187 | ||
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| Author | Kralj-Fiser, S.; Scheiber, I.B.R.; Blejec, A.; Moestl, E.; Kotrschal, K. | ||||
| Title | Individualities in a flock of free-roaming greylag geese: behavioral and physiological consistency over time and across situations | Type | Journal Article | ||
| Year | 2007 | Publication |
Hormones and Behavior | Abbreviated Journal | Horm Behav |
| Volume | 51 | Issue | 2 | Pages | 239-248 |
| Keywords | Animals; Behavior, Animal/*physiology; Corticosterone/metabolism; Feces; Female; Geese/*physiology; Individuality; Male; Personality/*physiology; Population Density; Reproducibility of Results; Seasons; *Social Behavior; Social Environment; Testosterone/*metabolism | ||||
| Abstract | The concept of personality implies individual differences in behavior and physiology that show some degree of repeatability/consistency over time and across contexts. Most studies of animal personality, particularly studies of individuals' variation in physiological mechanisms, have been conducted on selected individuals in controlled conditions. We attempted to detect consistent behaviors as well as physiological patterns in greylag ganders (Anser anser) from a free-roaming flock living in semi-natural conditions. We tested 10 individuals repeatedly, in a handling trial, resembling tests for characterization of “temperaments” in captive animals. We recorded the behavior of the same 10 individuals during four situations in the socially intact flock: (1) a “low density feeding condition”, (2) a “high density feeding condition”, (3) a “low density post-feeding situation” and (4) while the geese rested. We collected fecal samples for determination of excreted immuno-reactive corticosterone (BM) and testosterone metabolites (TM) after handling trials, as well as the “low density feeding” and the “high density feeding” conditions. BM levels were very highly consistent over the repeats of handling trials, and the “low density feeding condition” and tended to be consistent over the first two repeats of the “high density feeding condition”. Also, BM responses tended to be consistent across contexts. Despite seasonal variation, there tended to be inter-test consistency of TM, which pointed to some individual differences in TM as well. Aggressiveness turned out to be a highly repeatable trait, which was consistent across social situations, and tended to correlate with an individual's resistance during handling trials. Also, “proximity to the female partner” and “sociability” – the average number of neighboring geese in a close distance while resting – were consistent. We conclude that aggressiveness, “affiliative tendencies” and levels of excreted corticosterone and testosterone metabolites may be crucial factors of personality in geese. | ||||
| Address | University of Ljubljana, Biotechnical faculty, Slovenia. simona.kralj@guest.arnes.si | ||||
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| ISSN | 0018-506X | ISBN | Medium | ||
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| Notes | PMID:17196200 | Approved | no | ||
| Call Number | Equine Behaviour @ team @ | Serial | 4189 | ||
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| Author | Stöwe, M. & Kotrschal, K. | ||||
| Title | Behavioural phenotypes may determine whether social context facilitates or delays novel object exploration in ravens. | Type | Journal Article | ||
| Year | 2007 | Publication |
International Journal of Ornithology | Abbreviated Journal | |
| Volume | 148 | Issue | Suppl 2 | Pages | 179-184 |
| Keywords | Corvus corax – Novel object exploration – Personality – Social facilitation | ||||
| Abstract | Individuals consistently differ in behavioural phenotypes. Here we examine the interaction between behavioural phenotype and response to social context during novel object exploration in a neophobic corvid species, the raven (Corvus corax). The presence of conspecifics tends to encourage object exploration and learning but may also delay or even inhibit exploratory behaviour. Factors such as individual differences in response to social context may determine whether the presence of a conspecific facilitates or inhibits approach to novel objects. We confronted eleven six-month-old hand-raised ravens with novel objects, both individually and in dyadic combinations. We defined individuals as “fast” and “slow” explorers on the basis of their approach latency to novel objects when tested individually. The presence of a conspecific delayed the approach of fast birds to novel objects. Slow birds, in contrast, approached the novel objects with lower latencies and spent more time close to them when in dyads with fast siblings than when alone. The individuals" approach behaviour seemed to determine whether social context facilitated or delayed exploratory behaviour. This may contribute to explaining ambiguous results concerning the effects of social context in previous studies. | ||||
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| Notes | Approved | no | |||
| Call Number | Equine Behaviour @ team @ | Serial | 4507 | ||
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