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| Author | McGreevy, P.D.; Richardson, J.D.; Nicol, C.J.; Lane, J.G. | ||||
| Title | Radiographic and endoscopic study of horses performing an oral based stereotypy | Type | Journal Article | ||
| Year | 1995 | Publication | Equine veterinary journal | Abbreviated Journal | Equine Vet J |
| Volume | 27 | Issue | 2 | Pages | 92-95 |
| Keywords | Animals; Endoscopy/*veterinary; Esophagus/physiopathology/radiography; Female; Fluoroscopy/veterinary; Horse Diseases/physiopathology/*psychology/radiography; Horses; Male; Pharynx/physiopathology/radiography; *Stereotyped Behavior; Video Recording | ||||
| Abstract | There is confusion in the veterinary literature concerning the definition of oral based stereotypies in the horse. This study reports the use of fluoroscopy and endoscopy during cribbiting/wind-sucking in afflicted horses. This permitted observations of movements of the pharyngeal and oesophageal tissues and of the air column within during the stereotypic behaviour. The findings reported show that the sequence of events during crib-biting/wind-sucking is not related to deglutition and that air is not swallowed to the stomach. Transient dilation of the upper oesophagus was recorded and the characteristic noise of wind-sucking coincided with the in-rush of air through the cricopharynx. The oesophageal distension was relieved when the air returned to the pharynx although small quantities passed caudally. It is proposed that the role of contraction of the strap muscles of the neck is to create a pressure gradient in the soft tissues surrounding the oesophagus which provokes movement of air from the pharynx into the oesophagus. The findings suggest that the definitions currently used in the sale of horses are in need of revision. | ||||
| Address | Department of Clinical Veterinary Science, University of Bristol, Langford, UK | ||||
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| Language | English | Summary Language | Original Title | ||
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| ISSN | 0425-1644 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
Notes  |
PMID:7607156 | Approved | no | ||
| Call Number | refbase @ user @ | Serial | 90 | ||
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| Author | McGreevy, P.D.; Cripps, P.J.; French, N.P.; Green, L.E.; Nicol, C.J. | ||||
| Title | Management factors associated with stereotypic and redirected behaviour in the thoroughbred horse | Type | Journal Article | ||
| Year | 1995 | Publication | Equine veterinary journal | Abbreviated Journal | Equine Vet J |
| Volume | 27 | Issue | 2 | Pages | 86-91 |
| Keywords | Animal Husbandry/*methods; Animals; Horse Diseases/psychology/*therapy; Horses; Risk Factors; *Stereotyped Behavior; Time Factors | ||||
| Abstract | A greater knowledge of the effect of management factors is required to investigate the ontogeny of abnormal behaviour in the stabled horse. A postal survey of racehorse (flat) trainers yielded information about 22 yard and management factors. The relationship of the factors to the prevalence of abnormal behaviour was analysed by logistic regression. Management factors related to the time spent in the stable showed the strongest associations with stereotypic behaviour. The risk of horses performing abnormal behaviour increased: 1) as the amount of forage fell below 6.8 kg/day, 2) when bedding types other than straw were used, 3) when the total number of horses on the yard was fewer than 75, 4) in association with box designs that minimised contact between neighbouring horses, 5) when hay, rather than other types of forage, was used. | ||||
| Address | Department of Animal Health and Husbandry, School of Veterinary Science, University of Bristol, Langford, UK | ||||
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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:7607155 | Approved | no | ||
| Call Number | refbase @ user @ | Serial | 91 | ||
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| Author | Houpt, K.A. | ||||
| Title | New perspectives on equine stereotypic behaviour | Type | |||
| Year | 1995 | Publication | Equine veterinary journal | Abbreviated Journal | Equine Vet J |
| Volume | 27 | Issue | 2 | Pages | 82-83 |
| Keywords | Animals; Horses/*psychology; Stereotyped Behavior/*physiology | ||||
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| Language | English | Summary Language | Original Title | ||
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| ISSN | 0425-1644 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes |
PMID:7607153 | Approved | no | ||
| Call Number | refbase @ user @ | Serial | 34 | ||
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| Author | Clayton, H.M. | ||||
| Title | Comparison of the stride kinematics of the collected, medium, and extended walks in horses | Type | Journal Article | ||
| Year | 1995 | Publication | American Journal of Veterinary Research | Abbreviated Journal | Am J Vet Res |
| Volume | 56 | Issue | 7 | Pages | 849-852 |
| Keywords | Analysis of Variance; Animals; *Gait; Horses/*physiology; *Locomotion; Motion Pictures; Physical Conditioning, Animal; Walking | ||||
| Abstract | Six horses, highly trained for dressage competition, were used to study the stride kinematics of the walk, and to compare the kinematics of the collected, medium, and extended walks. Horses were filmed in a sagittal plane at a rate of 150 frames/s; temporal, linear, and angular data were extracted from the films. Results of ANOVA and Duncan's multiple range test indicated that the speed of the collected walk (1.37 m/s) was significantly (P < 0.01) slower than that of the medium (1.73 m/s) and extended (1.82 m/s) walks, values for which were not significantly different from each other. The increase in speed was associated with a significant increase in stride length, from 157 cm in the collected walk to 193 cm in the extended walk. This was a result of an increase in the over-tracking distance, whereas there was no significant difference in the distance between lateral placements of the limbs. Stride duration decreased (P < 0.01) from the collected walk (1,159 ms) to the extended walk (1,064 ms). Angles of the metacarpal and metatarsal segments, measured on the palmar/ plantar aspect, were higher at impact and lower at lift off in the collected than in the extended walk (P < 0.01). This indicated greater range of angular motion of this segment during the stance phase in the extended walk. Only 1 of the 6 horses had a regular 4-beat rhythm of the footfalls, with equal time elapsing between the lateral and diagonal footfalls. | ||||
| Address | Department of Veterinary Anatomy, Western College of Veterinary Medicine, Canada | ||||
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| Language | English | Summary Language | Original Title | ||
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| ISSN | 0002-9645 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes |
PMID:7574149 | Approved | no | ||
| Call Number | Equine Behaviour @ team @ | Serial | 3743 | ||
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| Author | Hauser, M.D.; Kralik, J.; Botto-Mahan, C.; Garrett, M.; Oser, J. | ||||
| Title | Self-recognition in primates: phylogeny and the salience of species-typical features | Type | Journal Article | ||
| Year | 1995 | Publication | Proceedings of the National Academy of Sciences of the United States of America | Abbreviated Journal | Proc. Natl. Acad. Sci. U.S.A. |
| Volume | 92 | Issue | 23 | Pages | 10811-10814 |
| Keywords | Animals; *Behavior, Animal; *Cognition; Discrimination (Psychology); Exploratory Behavior; Female; Hair Color; Male; Phylogeny; Psychology, Comparative; Research Design; Saguinus/*psychology; *Self Concept; Species Specificity; Touch; *Visual Perception | ||||
| Abstract | Self-recognition has been explored in nonlinguistic organisms by recording whether individuals touch a dye-marked area on visually inaccessible parts of their face while looking in a mirror or inspect parts of their body while using the mirror's reflection. Only chimpanzees, gorillas, orangutans, and humans over the age of approximately 2 years consistently evidence self-directed mirror-guided behavior without experimenter training. To evaluate the inferred phylogenetic gap between hominoids and other animals, a modified dye-mark test was conducted with cotton-top tamarins (Saguinus oedipus), a New World monkey species. The white hair on the tamarins' head was color-dyed, thereby significantly altering a visually distinctive species-typical feature. Only individuals with dyed hair and prior mirror exposure touched their head while looking in the mirror. They looked longer in the mirror than controls, and some individuals used the mirror to observe visually inaccessible body parts. Prior failures to pass the mirror test may have been due to methodological problems, rather than to phylogenetic differences in the capacity for self-recognition. Specifically, an individual's sensitivity to experimentally modified parts of its body may depend crucially on the relative saliency of the modified part (e.g., face versus hair). Moreover, and in contrast to previous claims, we suggest that the mirror test may not be sufficient for assessing the concept of self or mental state attribution in nonlinguistic organisms. | ||||
| Address | Department of Anthropology, Harvard University, Cambridge, MA 02138, USA | ||||
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| Language | English | Summary Language | Original Title | ||
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| ISSN | 0027-8424 | ISBN | Medium | ||
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| Notes |
PMID:7479889 | Approved | no | ||
| Call Number | Equine Behaviour @ team @ | Serial | 2825 | ||
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| Author | Connor, R.C. | ||||
| Title | Altruism among non-relatives: alternatives to the 'Prisoner's Dilemma' | Type | Journal Article | ||
| Year | 1995 | Publication | Trends in Ecology & Evolution | Abbreviated Journal | Trends Ecol Evol |
| Volume | 10 | Issue | 2 | Pages | 84-86 |
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| Abstract | Triver's model of reciprocal altruism, and its descendants based on the Prisoner's Dilemma model, have dominated thinking about cooperation and altruism between non-relatives. However, there are three alternative models of altruism directed to non-relatives. These models, which are not based on the Prisoner's Dilemma, may explain a variety of phenomena, from allogrooming among impala to helping by non-relatives in cooperatively breeding birds and mammals. | ||||
| Address | Division of Biological Sciences and The Michigan Society of Fellows, Museum of Zoology, University of Michigan, Ann Arbor MI, 48109, USA | ||||
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| Language | English | Summary Language | Original Title | ||
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| ISSN | 0169-5347 | ISBN | Medium | ||
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| Notes |
PMID:21236964 | Approved | no | ||
| Call Number | Equine Behaviour @ team @ | Serial | 5407 | ||
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| Author | Boissy, A. | ||||
| Title | Fear and Fearfulness in Animals | Type | Journal Article | ||
| Year | 1995 | Publication | The Quarterly Review of Biology | Abbreviated Journal | The Quarterly Review of Biology |
| Volume | 70 | Issue | 2 | Pages | 165-191 |
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| Abstract | Persistence of individual differences in animal behavior in reactions to various environmental challenges could reflect basic divergences in temperament, which might be used to predict details of adaptive response. Although studies have been carried out on fear and anxiety in various species, including laboratory, domestic and wild animals, no consistent definition of fearfulness as a basic trait of temperament has emerged. After a classification of the events that may produce a state of fear, this article describes the great variability in behavior and in physiological patterns generally associated with emotional reactivity. The difficulties of proposing fearfulness-the general capacity to react to a variety of potentially threatening situations-as a valid basic internal variable are then discussed. Although there are many studies showing covariation among the psychobiological responses to different environmental challenges, other studies find no such correlations and raise doubts about the interpretation of fearfulness as a basic personality trait. After a critical assessment of methodologies used in fear and anxiety studies, it is suggested that discrepancies among results are mainly due to the modulation of emotional responses in animals, which depend on numerous genetic and epigenetic factors. It is difficult to compare results obtained by different methods from animals reared under various conditions and with different genetic origins. The concept of fearfulness as an inner trait is best supported by two kinds of investigations. First, an experimental approach combining ethology and experimental psychology produces undeniable indicators of emotional reactivity. Second, genetic lines selected for psychobiological traits prove useful in establishing between behavioral and neuroendocrine aspects of emotional reactivity. It is suggested that fearfulness could be considered a basic feature of the temperament of each individual, one that predisposes it to respond similarly to a variety of potentially alarming challenges, but is nevertheless continually modulated during development by the interaction of genetic traits of reactivity with environmental factors, particularly in the juvenile period. Such interaction may explain much of the interindividual variability observed in adaptive responses. | ||||
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| Publisher | The University of Chicago Press | Place of Publication | Editor | ||
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| ISSN | 0033-5770 | ISBN | Medium | ||
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| Notes |
doi: 10.1086/418981 | Approved | no | ||
| Call Number | Equine Behaviour @ team @ | Serial | 6664 | ||
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| Author | Mesterton-Gibbons, M.; Dugatkin, L.A. | ||||
| Title | Toward a theory of dominance hierarchies: effects of assessment, group size, and variation in fighting ability | Type | Journal Article | ||
| Year | 1995 | Publication | Behavioral Ecology | Abbreviated Journal | Behav. Ecol. |
| Volume | 6 | Issue | 4 | Pages | 416-423 |
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| Abstract | We introduce assessment to the analysis of dominance hierarchies by exploring the effect of an evolutionarily stable fighting rule when there is variation in resource holding potential (RHP) and RHP is not a perfectly reliable predictor of the outcome of a fight. With assessment, the probability of a linear hierarchy decreases with group size but can remain appreciable for groups of up to seven or eight individuals, whereas it decreases virtually to zero if there is no assessment. The probability of a hierarchy that correlates perfectly with RHP is low unless group size is small. | ||||
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10.1093/beheco/6.4.416 | Approved | no | ||
| Call Number | refbase @ user @ | Serial | 447 | ||
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| Author | Clutton-Brock, T.H.; Parker, G.A. | ||||
| Title | Punishment in animal societies | Type | Journal Article | ||
| Year | 1995 | Publication | Abbreviated Journal | Nature | |
| Volume | 373 | Issue | 6511 | Pages | 209-216 |
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| Abstract | Although positive reciprocity (reciprocal altruism) has been a focus of interest in evolutionary biology, negative reciprocity (retaliatory infliction of fitness reduction) has been largely ignored. In social animals, retaliatory aggression is common, individuals often punish other group members that infringe their interests, and punishment can cause subordinates to desist from behaviour likely to reduce the fitness of dominant animals. Punishing strategies are used to establish and maintain dominance relationships, to discourage parasites and cheats, to discipline offspring or prospective sexual partners and to maintain cooperative behaviour. | ||||
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10.1038/373209a0 | Approved | no | ||
| Call Number | Equine Behaviour @ team @ | Serial | 4838 | ||
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| Author | VanDierendonck, M.C.; de Vries, H.; Schilder, M.B.H. | ||||
| Title | An Analysis of Dominance, Its Behavioural Parameters and Possible Determinants in a Herd of Icelandic orses in Captivity | Type | Journal Article | ||
| Year | 1995 | Publication | Netherlands Journal of Zoology | Abbreviated Journal | Netherl. J. Zool. |
| Volume | 45 | Issue | 3-4 | Pages | 362-385 |
| Keywords | Dominance; rank order; horses; Icelandic horses. | ||||
| Abstract | Th e applicability of the concept of dominance was investigated in a captive herd of  Icelandic horses and  ponies of diff erent breeds. Eight out of  behaviours possibly related to dominance occurred frequently enough to be investigated in detail. For these eight agonistic behaviours the coverage, the unidirectionality in the exchange, and the degree of transitivity (Landau`s linearity index) were calculated. Four off ensive behaviours, together with avoidance, were suitable for further analysis with regard to dominance. Th e patterns of asymmetries with which these behaviours were exchanged were suffi ciently similar as to justify the application of the dominance concept and to construct a (nearly) linear dominance hierarchy. Th e rank order of the castrated stallions was completely linear, the hierarchy of the mares was almost completely linear. Th e results suggest that off ensive and defensive aggressive behaviours should be treated separately and that the concept of dominance is applicable. However, ritualized formal dominance signals between adult horses appear to be (almost) absent. Th e rank positions of the individuals were correlated with age and residency in the herd but not with height. Middle ranking horses tended to be more frequently in the close vicinity of another horse than high ranking or low ranking horses. Over and above this correlation at the individual level, it was found that pairs of horses close in rank to each other were more often also spatially close to each other. Being in oestrus did not infl uence the dominance relationships between mares. For castrated stallions the rank positions were correlated with the age at which they were castrated. Th is suggests that in male horses experience prior to neutering infl uences the behaviour afterwards. |
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Approved | no | |||
| Call Number | refbase @ user @ | Serial | 440 | ||
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