| Records |
| Author |
Horner, V.; Whiten, A. |
| Title |
Causal knowledge and imitation/emulation switching in chimpanzees (Pan troglodytes) and children (Homo sapiens) |
Type |
Journal Article |
Year  |
2005 |
Publication |
Animal cognition |
Abbreviated Journal |
Anim. Cogn. |
| Volume |
8 |
Issue |
3 |
Pages |
164-181 |
| Keywords |
Animals; Child Behavior; Child, Preschool; *Concept Formation; Female; Humans; *Imitative Behavior; *Learning; Male; Pan troglodytes; *Problem Solving; Psychomotor Performance; *Social Environment; Species Specificity |
| Abstract |
This study explored whether the tendency of chimpanzees and children to use emulation or imitation to solve a tool-using task was a response to the availability of causal information. Young wild-born chimpanzees from an African sanctuary and 3- to 4-year-old children observed a human demonstrator use a tool to retrieve a reward from a puzzle-box. The demonstration involved both causally relevant and irrelevant actions, and the box was presented in each of two conditions: opaque and clear. In the opaque condition, causal information about the effect of the tool inside the box was not available, and hence it was impossible to differentiate between the relevant and irrelevant parts of the demonstration. However, in the clear condition causal information was available, and subjects could potentially determine which actions were necessary. When chimpanzees were presented with the opaque box, they reproduced both the relevant and irrelevant actions, thus imitating the overall structure of the task. When the box was presented in the clear condition they instead ignored the irrelevant actions in favour of a more efficient, emulative technique. These results suggest that emulation is the favoured strategy of chimpanzees when sufficient causal information is available. However, if such information is not available, chimpanzees are prone to employ a more comprehensive copy of an observed action. In contrast to the chimpanzees, children employed imitation to solve the task in both conditions, at the expense of efficiency. We suggest that the difference in performance of chimpanzees and children may be due to a greater susceptibility of children to cultural conventions, perhaps combined with a differential focus on the results, actions and goals of the demonstrator. |
| Address |
Centre for Social Learning and Cognitive Evolution, School of Psychology, University of St Andrews, St Andrews, KY16 9JU, UK. vkh1@st-andrews.ac.uk |
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English |
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Series Issue |
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Edition |
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| ISSN |
1435-9448 |
ISBN |
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Conference |
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| Notes |
PMID:15549502 |
Approved |
no |
| Call Number |
refbase @ user @ |
Serial |
732 |
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| Author |
Devenport, J.A.; Patterson, M.R.; Devenport, L.D. |
| Title |
Dynamic averaging and foraging decisions in horses (Equus callabus) |
Type |
Journal Article |
| Year |
2005 |
Publication |
Journal of Comparative psychology |
Abbreviated Journal |
J. Comp. Psychol. |
| Volume |
119 |
Issue |
3 |
Pages |
352-358 |
| Keywords |
Animals; *Decision Making; *Feeding Behavior; Female; Horses/*psychology; Male; *Memory, Short-Term; Motivation; Orientation; *Social Environment |
| Abstract |
The variability of most environments taxes foraging decisions by increasing the uncertainty of the information available. One solution to the problem is to use dynamic averaging, as do some granivores and carnivores. Arguably, the same strategy could be useful for grazing herbivores, even though their food renews and is more homogeneously distributed. Horses (Equus callabus) were given choices between variable patches after short or long delays. When patch information was current, horses returned to the patch that was recently best, whereas those without current information matched choices to the long-term average values of the patches. These results demonstrate that a grazing species uses dynamic averaging and indicate that, like granivores and carnivores, they can use temporal weighting to optimize foraging decisions. |
| Address |
Department of Psychology, University of Central Oklahoma, 73034, USA. jdevenport@ucok.edu |
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English |
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Series Issue |
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Edition |
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| ISSN |
0735-7036 |
ISBN |
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Medium |
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Expedition |
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Conference |
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| Notes |
PMID:16131264 |
Approved |
no |
| Call Number |
refbase @ user @ |
Serial |
752 |
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| Author |
Uehara, T.; Yokomizo, H.; Iwasa, Y. |
| Title |
Mate-choice copying as Bayesian decision making |
Type |
Journal Article |
| Year |
2005 |
Publication |
The American naturalist |
Abbreviated Journal |
Am Nat |
| Volume |
165 |
Issue |
3 |
Pages |
403-410 |
| Keywords |
Animals; *Bayes Theorem; *Choice Behavior; Female; Male; *Models, Biological; *Sexual Behavior, Animal |
| Abstract |
Mate-choice copying by females has been reported in fishes (e.g., guppies) and lekking birds. Presumably, females assess males' quality using both information from direct observation of males and information acquired by observing other females' choices. Here, we study mathematically the conditions under which mate-choice copying is advantageous on the basis of Bayesian decision theory. A female may observe the mate choice of another female, called the model female, who has performed an optimal choice based on her own judgment. The conditions required for the focal female to choose the same mate as that chosen by the model female should depend on the male's appearance to her, the reliability of her own judgment of male quality, and the reliability of the model females. When three or more females are involved, the optimal mate choice critically depends on whether multiple model females make decisions independently or they themselves copy the choices of others. If two equally reliable females choose different males, the choice of the second female, made knowing the choice of the first, should have a stronger effect on the choice of the third (focal) female. This “last-choice precedence” should be tested experimentally. |
| Address |
Department of Biology, Faculty of Sciences, Kyushu University, Fukuoka 812-8581, Japan. uehara@bio-math.biology.kyushu-u.ac.jp |
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English |
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Series Issue |
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Edition |
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| ISSN |
1537-5323 |
ISBN |
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Medium |
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Conference |
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| Notes |
PMID:15729669 |
Approved |
no |
| Call Number |
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Serial |
1821 |
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| Author |
Papakostas, Y.G.; Daras, M.D.; Liappas, I.A.; Markianos, M. |
| Title |
Horse madness (hippomania) and hippophobia |
Type |
Journal Article |
| Year |
2005 |
Publication |
History of Psychiatry |
Abbreviated Journal |
Hist Psychiatry |
| Volume |
16 |
Issue |
Pt 4 (no 64) |
Pages |
467-471 |
| Keywords |
Ancient Lands; Animals; Cattle; History, Ancient; Horse Diseases/*history; Horses; Humans; *Mythology |
| Abstract |
Anthropophagic horses have been described in classical mythology. From a current perspective, two such instances are worth mentioning and describing: Glaucus of Potniae, King of Efyra, and Diomedes, King of Thrace, who were both devoured by their horses. In both cases, the horses' extreme aggression and their subsequent anthropophagic behaviour were attributed to their madness (hippomania) induced by the custom of feeding them with flesh. The current problem of 'mad cow' disease (bovine spongiform encephalopathy) is apparently related to a similar feed pattern. Aggressive behaviour in horses can be triggered by both biological and psychological factors. In the cases cited here, it is rather unlikely that the former were the cause. On the other hand, the multiple abuses imposed on the horses, coupled with people's fantasies and largely unconscious fears (hippophobia), may possibly explain these mythological descriptions of 'horse-monsters'. |
| Address |
Athens University Medical School |
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English |
Summary Language |
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Series Title |
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Series Issue |
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Edition |
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| ISSN |
0957-154X |
ISBN |
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Medium |
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Expedition |
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Conference |
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| Notes |
PMID:16482685 |
Approved |
no |
| Call Number |
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Serial |
1876 |
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| Author |
Piccione, G.; Caola, G.; Refinetti, R. |
| Title |
Temporal relationships of 21 physiological variables in horse and sheep |
Type |
Journal Article |
| Year |
2005 |
Publication |
Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology |
Abbreviated Journal |
Comp Biochem Physiol A Mol Integr Physiol |
| Volume |
142 |
Issue |
4 |
Pages |
389-396 |
| Keywords |
Animals; Behavior, Animal/physiology; Blood Glucose/physiology; Body Temperature/*physiology; Circadian Rhythm/*physiology; Female; Horses/*physiology; Melatonin/blood/*physiology; Motor Activity/*physiology; Rectum/physiology; Sheep/*physiology; Time Factors |
| Abstract |
Daily or circadian oscillation has been documented in a variety of physiological and behavioral processes. Although individual variables have been studied in great detail, very few studies have been conducted on the temporal relationships between the rhythms of different variables. It is not known whether the circadian pacemaker generates each and every rhythm individually or whether most rhythms are simply derived from a few clock-controlled rhythms. As a first step in elucidating this issue, 21 physiological variables were recorded simultaneously in horse and sheep. The results indicated that, in both species, different variables exhibit different degrees of daily rhythmicity and reach their daily peaks at different times of the day. The variables exhibiting strongest rhythmicity were locomotor activity, rectal temperature, and plasma concentrations of melatonin and glucose. Comparison of rhythmicity and acrophase in the various rhythms allowed inferences to be made about mechanisms of causation. |
| Address |
Dipartimento di Morfologia, Biochimica, Fisiologia e Produzioni Animali, Facolta di Medicina Veterinaria, Universita degli Studi di Messina, 98168 Messina, Italy |
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English |
Summary Language |
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Series Issue |
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Edition |
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| ISSN |
1095-6433 |
ISBN |
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Expedition |
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Conference |
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| Notes |
PMID:16290083 |
Approved |
no |
| Call Number |
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Serial |
1884 |
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| Author |
Mejdell, C.M.; Simensen, E.; Boe, K.E. |
| Title |
Is snow a sufficient source of water for horses kept outdoors in winter? A case report |
Type |
Journal Article |
| Year |
2005 |
Publication |
Acta Veterinaria Scandinavica |
Abbreviated Journal |
Acta Vet Scand |
| Volume |
46 |
Issue |
1-2 |
Pages |
19-22 |
| Keywords |
Animals; *Drinking Behavior; *Horses; Norway; Osmolar Concentration; Snow; *Thirst; *Water Supply |
| Abstract |
Due to extreme weather conditions, a flock of outwintered Icelandic horses had to manage for several days on snow as the source of free water. They were fed grass silage ad lib, and any change in feed consumption was not observed. After nine days, blood samples were taken and analysed for plasma osmolality, they were subjected to a simple clinical examination, and offered drinking water. Osmolality levels were within normal limits and mean value did not differ significantly from samples which previously were taken of the same individuals. The general condition of the horses was normal, with no signs of clinical dehydration or disease. The horses showed very little interest for the offered drinking water. This suggests that in cold winter weather, horses being fed grass silage and adjusted to eat snow, can manage for several days with snow substituting liquid water without their physiology and welfare being challenged. |
| Address |
National Centre for Veterinary Contract Research and Commercial Services, Ltd |
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Place of Publication |
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English |
Summary Language |
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Original Title |
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Series Title |
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Abbreviated Series Title |
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Series Issue |
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Edition |
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| ISSN |
0044-605X |
ISBN |
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Medium |
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Conference |
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| Notes |
PMID:16108209 |
Approved |
no |
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Serial |
1886 |
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| Author |
Kobayashi, K.; Jackowiak, H.; Frackowiak, H.; Yoshimura, K.; Kumakura, M.; Kobayashi, K. |
| Title |
Comparative morphological study on the tongue and lingual papillae of horses (Perissodactyla) and selected ruminantia (Artiodactyla) |
Type |
Journal Article |
| Year |
2005 |
Publication |
Italian Journal of Anatomy and Embryology = Archivio Italiano di Anatomia ed Embriologia |
Abbreviated Journal |
Ital J Anat Embryol |
| Volume |
110 |
Issue |
2 Suppl 1 |
Pages |
55-63 |
| Keywords |
Animals; Artiodactyla/*anatomy & histology/physiology; Cattle; Connective Tissue/physiology/ultrastructure; Feeding Behavior/physiology; Goats/anatomy & histology/physiology; Horses/anatomy & histology/physiology; Mastication/physiology; Microscopy, Electron, Scanning; Perissodactyla/*anatomy & histology/physiology; Tongue/physiology/*ultrastructure |
| Abstract |
A common characteristic of horses, Rocky Mountain goats, and cattle is that they all have a well developed lingual prominence on the dorsal surface of the posterior area of the tongue. Foliate papillae were found in the horse studied but not in the goat or in cattle. The horse filiform papillae had a long and slender external form with a thin and slender CTC, while in the goat and cattle the external form consisted of a large thick main process and the CTC consisted of a bundle of numerous rod-shaped protrusions. The special papilla found on the lingual prominence resembled larger filiform-like papillae in the horses; however, in the goat and cattle it was a very thick and large tongue like papillae. The horses had two large vallate papillae, while the goat and cattle had 15 or more vallate papillae at the posterior area of the lingual prominence. This suggests that the fine structure of horse tongues may display a more primitive pattern than that present in goats and cattle. |
| Address |
Department of Anatomy, School of Dentistry at Niigata, The Nippon Dental University, Niigata, Japan. kobayashi@ngt.ndu.ac.jp |
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English |
Summary Language |
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Series Title |
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Abbreviated Series Title |
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Series Issue |
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Edition |
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| ISSN |
1122-6714 |
ISBN |
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Conference |
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| Notes |
PMID:16101021 |
Approved |
no |
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Serial |
1887 |
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| Author |
Husted, L.; Andersen, M.S.; Borggaard, O.K.; Houe, H.; Olsen, S.N. |
| Title |
Risk factors for faecal sand excretion in Icelandic horses |
Type |
Journal Article |
| Year |
2005 |
Publication |
Equine Veterinary Journal |
Abbreviated Journal |
Equine Vet J |
| Volume |
37 |
Issue |
4 |
Pages |
351-355 |
| Keywords |
Animal Feed; Animal Husbandry/methods; Animals; Denmark; Feces/*chemistry; Female; Gastrointestinal Diseases/epidemiology/etiology/prevention & control/veterinary; Horse Diseases/epidemiology/etiology/prevention & control; Horses/*metabolism; Logistic Models; Male; Pilot Projects; *Poaceae/growth & development; Risk Factors; Silicon Dioxide/administration & dosage/adverse effects/*analysis; Soil/*analysis |
| Abstract |
REASONS FOR PERFORMING STUDY: Sandy soil is often mentioned as a risk factor in the development of sand-related gastrointestinal disease (SGID) in the horse. There are other variables, but few studies confirm any of these. OBJECTIVE: To investigate soil type, pasture quality, feeding practice in the paddock, age, sex and body condition score as risk factors for sand intake in the horse. METHODS: Faeces were collected from 211 Icelandic horses on 19 different studs in Denmark together with soil samples and other potential risk factors. Sand content in faeces determined by a sand sedimentation test was interpreted as evidence of sand intake. Soil types were identified by soil analysis and significance of the data was tested using logistic analysis. RESULTS: Of horses included in the study, 56.4% showed sand in the faeces and 5.7% had more than 5 mm sand as quantified by the rectal sleeve sedimentation test. Soil type had no significant effect when tested as main effect, but there was interaction between soil type and pasture quality. Significant interactions were also found between paddock feeding practice and pasture quality. CONCLUSION: To evaluate the risk of sand intake it is important to consider 3 variables: soil type, pasture quality and feeding practice. Pasture quality was identified as a risk factor of both short and long grass in combination with sandy soil, while clay soil had the lowest risk in these combinations. Feeding practice in the paddock revealed feeding directly on the ground to be a risk factor when there was short (1-5 cm) or no grass. Also, no feeding outdoors increased the risk on pastures with short grass, while this had no effect in paddocks with no grass. More than 50% of all horses investigated in this study had sand in the faeces. POTENTIAL RELEVANCE: The identification of risk factors is an important step towards prevention of SGID. Further research is necessary to determine why some horses exhibit more than 5 mm sand in the sedimentation test and whether this is correlated with geophagic behaviour. |
| Address |
Department of Large Animal Sciences, The Royal Veterinary and Agricultural University, Dyrlaegevej 88, DK-1870 Frederiksberg, Denmark |
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English |
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Abbreviated Series Title |
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Series Issue |
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Edition |
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| ISSN |
0425-1644 |
ISBN |
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Conference |
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| Notes |
PMID:16028626 |
Approved |
no |
| Call Number |
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Serial |
1888 |
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| Author |
Pritchard, J.C.; Lindberg, A.C.; Main, D.C.J.; Whay, H.R. |
| Title |
Assessment of the welfare of working horses, mules and donkeys, using health and behaviour parameters |
Type |
Journal Article |
| Year |
2005 |
Publication |
Preventive Veterinary Medicine |
Abbreviated Journal |
Prev Vet Med |
| Volume |
69 |
Issue |
3-4 |
Pages |
265-283 |
| Keywords |
*Animal Welfare; Animals; Behavior, Animal; Developing Countries; *Equidae; Female; Health; Male |
| Abstract |
Working animals provide an essential transport resource in developing countries worldwide. Many of these animals are owned by poor people and work in harsh environments, so their welfare is a cause for concern. A protocol was developed to assess the welfare of working horses, mules and donkeys in urban and peri-urban areas, using direct observation of health and behaviour parameters. In this study, 4903 animals used for draught, pack and ridden work in Afghanistan, Egypt, India, Jordan and Pakistan were assessed between December 2002 and April 2003. The data showed that donkeys were more likely than mules or horses to demonstrate avoidance or aggressive behaviour towards an observer, while horses were most likely to make a friendly approach. Fewer than 8% of working equines had abnormal mucous membranes, ectoparasites or poor coat condition. Body lesions occurred predominantly in the areas of the breast/shoulder, withers and girth in all three species, with mules having the highest prevalence of lesions in these areas (22.5, 21.3 and 28.4%, respectively). Among horses and donkeys, the prevalence of these lesions was influenced by the type of work carried out. Lesions on the head, neck, ribs, flank and tail base were seen in less than 10% of animals. Across all three species approximately 70% of animals were thin, having a body condition score (BCS) of 2 or less on a scale of 1-5 (1, very thin; 5, very fat) and more horses were in very thin condition (BCS 1) than mules or donkeys. Over 75% of animals demonstrated limb deformities and abnormalities of gait. The results of this study are being used as the initial stage of a long-term strategy to inform priorities for welfare interventions in working equines and to establish a welfare benchmark. Subsequent stages will rank the welfare concerns identified, assess the contributing risk factors and implement specific interventions to address these risks. Following intervention, success in improving welfare will be measured by repetition of this protocol and comparison with the benchmark. |
| Address |
Department of Clinical Veterinary Science, University of Bristol, Langford, Bristol BS40 5DU, UK. joy.pritchard@bristol.ac.uk |
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English |
Summary Language |
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Series Title |
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Abbreviated Series Title |
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Edition |
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0167-5877 |
ISBN |
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| Notes |
PMID:15907574 |
Approved |
no |
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Serial |
1889 |
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| Author |
Grogan, E.H.; McDonnell, S.M. |
| Title |
Behavioral responses to two intranasal vaccine applicators in horses and ponies |
Type |
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| Year |
2005 |
Publication |
Journal of the American Veterinary Medical Association |
Abbreviated Journal |
J Am Vet Med Assoc |
| Volume |
226 |
Issue |
10 |
Pages |
1689-1693 |
| Keywords |
Administration, Intranasal; Animals; *Behavior, Animal; Female; Horses/physiology/*psychology; Immunization/instrumentation/methods/*veterinary; Male; Patient Compliance/psychology; Physical Examination/psychology/*veterinary; Vaccines/*administration & dosage; Videotape Recording |
| Abstract |
OBJECTIVE: To evaluate behavioral compliance of horses and ponies with simulated intranasal vaccination and assess development of generalized aversion to veterinary manipulations. DESIGN: Clinical trial. ANIMALS: 28 light horse mares, 3 pony geldings, 2 light horse stallions, and 3 pony stallions that had a history of compliance with veterinary procedures. PROCEDURE: Behavioral compliance with 2 intranasal vaccine applicators was assessed. Compliance with standard physical examination procedures was assessed before and after a single experience with either of the applicators or a control manipulation to evaluate development of generalized aversion to veterinary manipulation. RESULTS: In all 30 horses, simulated intranasal vaccination or the control manipulation could be performed without problematic avoidance behavior, and simulated intranasal vaccination did not have any significant effect on duration of or compliance with a standardized physical examination that included manipulation of the ears, nose, and mouth. Results were similar for the 2 intranasal vaccine applicators, and no difference in compliance was seen between horses in which warm versus cold applicators were used. For 3 of the 6 ponies, substantial avoidance behavior was observed in association with simulated intranasal vaccination, and compliance with physical examination procedures decreased after simulated intranasal vaccination. CONCLUSIONS AND CLINICAL RELEVANCE: Although some compliance problems were seen with ponies, neither problems with compliance with simulated intranasal vaccination nor adverse effects on subsequent physical examination were identified in any of the horses. Further study is needed to understand factors involved in practitioner reports of aversion developing in association with intranasal vaccination. |
| Address |
Equine Behavior Laboratory, New Bolton Center, School of Veterinary Medicine, University of Pennsylvania, Kennett Square, PA 19348, USA |
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English |
Summary Language |
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Abbreviated Series Title |
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Series Issue |
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Edition |
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0003-1488 |
ISBN |
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| Notes |
PMID:15906570 |
Approved |
no |
| Call Number |
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Serial |
1890 |
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