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Author |
McGreevy, P.D.; Cripps, P.J.; French, N.P.; Green, L.E.; Nicol, C.J. |
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Title |
Management factors associated with stereotypic and redirected behaviour in the thoroughbred horse |
Type |
Journal Article |
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Year |
1995 |
Publication |
Equine veterinary journal |
Abbreviated Journal |
Equine Vet J |
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Volume |
27 |
Issue |
2 |
Pages |
86-91 |
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Keywords |
Animal Husbandry/*methods; Animals; Horse Diseases/psychology/*therapy; Horses; Risk Factors; *Stereotyped Behavior; Time Factors |
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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. |
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Department of Animal Health and Husbandry, School of Veterinary Science, University of Bristol, Langford, UK |
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English |
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0425-1644 |
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PMID:7607155 |
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no |
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Call Number |
refbase @ user @ |
Serial |
91 |
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Author |
Madigan, J.E.; Kortz, G.; Murphy, C.; Rodger, L. |
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Title |
Photic headshaking in the horse: 7 cases |
Type |
Journal Article |
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Year |
1995 |
Publication |
Equine Veterinary Journal |
Abbreviated Journal |
Equine Vet J |
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Volume |
27 |
Issue |
4 |
Pages |
306-311 |
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Keywords |
Animals; Anti-Allergic Agents/therapeutic use; *Behavior, Animal; Cyproheptadine/therapeutic use; Female; *Head; Horse Diseases/drug therapy/*etiology; Horses; Light/*adverse effects; Male; Movement Disorders/drug therapy/etiology/*veterinary |
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Abstract |
Seven horses with headshaking are described. No physical abnormalities were detected in any of the cases. Six of these horses had onset of clinical signs in the spring. The role of light was assessed by application of a blindfold or dark grey lens to the eyes, covering the eyes with a face mask and observing the horse in total darkness outdoors. Cessation of headshaking was observed with blindfolding (5/5 horses), night darkness outdoors (4/4 horses) and use of grey lenses (2/3 horses). Outdoor behaviour suggested efforts to avoid light in 4/4 cases. The photic sneeze in man is suggested as a putative mechanism for equine headshaking. Five of 7 horses had improvement with cyproheptadine treatment (0.3 mg/kg bwt b.i.d.). Headshaking developed within 2 calendar weeks of the same date for 3 consecutive years in one horse. Neuropharmacological alterations associated with photoperiod mechanisms leading to optic trigeminal summation are suggested as possible reasons for spring onset of headshaking. |
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Department of Medicine and Epidemiology, School of Veterinary Medicine, University of California-Davis 95616-8737, USA |
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0425-1644 |
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Notes |
PMID:8536668 |
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no |
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Call Number |
refbase @ user @ |
Serial |
1940 |
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Author |
Holmstrom, M.; Fredricson, I.; Drevemo, S. |
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Title |
Biokinematic effects of collection on the trotting gaits in the elite dressage horse |
Type |
Journal Article |
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Year |
1995 |
Publication |
Equine Veterinary Journal |
Abbreviated Journal |
Equine Vet J |
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Volume |
27 |
Issue |
4 |
Pages |
281-287 |
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Keywords |
Animals; Biomechanics; Female; Gait/*physiology; Horses/*physiology; Kinesics; Male; Video Recording |
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Abstract |
Trot in hand, working trot, collected trot, passage and piaffe of 6 Grand Prix dressage horses were recorded by high speed film (250 frames/s). Angular patterns and hoof trajectories of the left fore- and hindlimbs were analysed and presented as mean and standard deviation (s.d.) curves. Speed and stride length decreased and fore- and hind stance phase durations increased with collection resulting in no suspension in piaffe. The diagonal advanced placement was positive in all gaits except for piaffe. Most of the changes in forelimb angular patterns were effects of reduction in forelimb pendulation. The horses did not step under themselves more in collected trot, passage and piaffe than in trot in hand. The stifle and hock joints were more flexed at the start of the stance phase in piaffe and passage than in the other gaits. Flexion of the hock joint at the middle of the stance phase was largest in passage and piaffe. In spite of the limited number of horses the present study confirmed earlier observations of conformation and gaits in dressage horses. Hindlimb pendulation, femur and pelvis inclinations and elbow, carpal, stifle and hock joint angles seem to be the most significant angular measurements for dressage performance. |
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Swedish National Stud, Flyinge |
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English |
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0425-1644 |
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Notes |
PMID:8536664 |
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no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
3742 |
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Author |
Noë, R.; Hammerstein, P. |
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Title |
Biological markets |
Type |
Journal Article |
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Year |
1995 |
Publication |
Trends in Ecology & Evolution |
Abbreviated Journal |
Trends. Ecol. Evol |
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Volume |
10 |
Issue |
8 |
Pages |
336-339 |
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Abstract |
In biological markets, two classes of traders exchange commodities to their mutual benefit. Characteristics of markets are: competition within trader classes by contest or outbidding; preference for partners offering the highest value; and conflicts over the exchange value of commodities. Biological markets are currently studied under at least three different headings: sexual selection, intraspecific cooperation and interspecific mutualism. The time is ripe for the development of game theoretic models that describe the common core of biological markets and integrate existing knowledge from the separate fields. |
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ISSN |
0169-5347 |
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Call Number |
Equine Behaviour @ team @ |
Serial |
4993 |
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Author |
Connor, R.C. |
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Title |
Altruism among non-relatives: alternatives to the 'Prisoner's Dilemma' |
Type |
Journal Article |
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Year |
1995 |
Publication |
Trends in Ecology & Evolution |
Abbreviated Journal |
Trends Ecol Evol |
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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. |
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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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0169-5347 |
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Notes |
PMID:21236964 |
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Call Number |
Equine Behaviour @ team @ |
Serial |
5407 |
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Author |
Boysen, S.T.; Berntson, G.G. |
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Title |
Responses to quantity: perceptual versus cognitive mechanisms in chimpanzees (Pan troglodytes) |
Type |
Journal Article |
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Year |
1995 |
Publication |
Journal of Experimental Psychology. Animal Behavior Processes |
Abbreviated Journal |
J Exp Psychol Anim Behav Process |
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Volume |
21 |
Issue |
1 |
Pages |
82-86 |
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Keywords |
Animals; Behavior, Animal; Choice Behavior; Cognition/*physiology; Female; *Pan troglodytes; Perception/*physiology; Reinforcement (Psychology); Task Performance and Analysis |
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Abstract |
Two chimpanzees were trained to select among 2 different amounts of candy (1-6 items). The task was designed so that selection of either array by the active (selector) chimpanzee resulted in that array being given to the passive (observer) animal, with the remaining (nonselected) array going to the selector. Neither animal was able to select consistently the smaller array, which would reap the larger reward. Rather, both animals preferentially selected the larger array, thereby receiving the smaller number of reinforcers. When Arabic numerals were substituted for the food arrays, however, the selector animal evidenced more optimal performance, immediately selecting the smaller numeral and thus receiving the larger reward. These findings suggest that a basic predisposition to respond to the perceptual-motivational features of incentive stimuli can interfere with task performance and that this interference can be overridden when abstract symbols serve as choice stimuli. |
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Comparative Cognition Project, Ohio State University, Columbus 43210-1222 |
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English |
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ISSN |
0097-7403 |
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Notes |
PMID:7844508 |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2783 |
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Author |
No authors listed |
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Title |
Workshop on the geographic spread of Aedes albopictus in Europe and the concern among public health authorities. Proceedings of a workshop held at the Istituto Superiore di Sanita, Rome, Italy, 19-20 December 1994 |
Type |
Conference Article |
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Year |
1995 |
Publication |
Parassitologia |
Abbreviated Journal |
Parassitologia |
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Volume |
37 |
Issue |
2-3 |
Pages |
87-90 |
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Keywords |
*Aedes/growth & development/parasitology/virology; African horse sickness virus; Animals; Commerce; Dengue Virus; Dirofilaria; Disease Reservoirs; Ecology; Europe; Humans; *Insect Vectors/growth & development/parasitology/virology; Italy; *Mosquito Control/methods/organization & administration; Public Health; Rift Valley fever virus |
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English |
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ISSN |
0048-2951 |
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Notes |
PMID:8778669 |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2659 |
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Author |
McGreevy, P.D.; French, N.P.; Nicol, C.J. |
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Title |
The prevalence of abnormal behaviours in dressage, eventing and endurance horses in relation to stabling |
Type |
Journal Article |
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Year |
1995 |
Publication |
The Veterinary record |
Abbreviated Journal |
Vet. Rec. |
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Volume |
137 |
Issue |
2 |
Pages |
36-37 |
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Keywords |
Animal Husbandry/*methods; Animals; *Behavior, Animal; Horse Diseases/*psychology; Horses; *Physical Conditioning, Animal; Prevalence; Questionnaires; *Stereotyped Behavior |
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Abstract |
The behaviour of horses competing in different disciplines was studied and the relationship between the time they spent out of the stable and the prevalence of abnormal behaviour was examined. The owners of dressage, eventing and endurance horses were sent a questionnaire and a total of 1101 responses were received, giving data on 1750 horses. The behaviours studied were wood-chewing, weaving, crib-biting/wind-sucking and box-walking. The reported percentage prevalences of abnormal behaviour for the dressage, eventing and endurance horses were 32.5, 30.8 and 19.5, respectively. The relationship between the time spent in the stable and the prevalence of abnormal behaviour was examined by chi 2 tests which showed that there were significant linear trends for the eventing group (P < 0.001) and the dressage group (P < 0.05). It is concluded that the time a horse spends out of the stable is related to the discipline for which it is being trained and in dressage and eventing horses the time spent in a stable is correlated with an increased risk of abnormal behaviour. |
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University of Bristol, Department of Clinical Veterinary Science, Langford |
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English |
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ISSN |
0042-4900 |
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Notes |
PMID:8525580 |
Approved |
no |
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Call Number |
refbase @ user @ |
Serial |
89 |
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Author |
de Waal, F.B. |
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Title |
Bonobo sex and society |
Type |
Journal Article |
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Year |
1995 |
Publication |
Scientific American |
Abbreviated Journal |
Sci Am |
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Volume |
272 |
Issue |
3 |
Pages |
82-88 |
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Keywords |
Animals; Evolution; Female; Hominidae; Humans; Male; Pan troglodytes/*physiology; Sexual Behavior, Animal/*physiology; Social Behavior |
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Address |
Yerkes Regional Primate Research Center, Atlanta |
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English |
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ISSN |
0036-8733 |
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Notes |
PMID:7871411 |
Approved |
no |
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Call Number |
refbase @ user @ |
Serial |
206 |
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Author |
Boissy, A. |
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Title |
Fear and Fearfulness in Animals |
Type |
Journal Article |
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Year |
1995 |
Publication |
The Quarterly Review of Biology |
Abbreviated Journal |
The Quarterly Review of Biology |
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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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The University of Chicago Press |
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0033-5770 |
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Notes |
doi: 10.1086/418981 |
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Call Number |
Equine Behaviour @ team @ |
Serial |
6664 |
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