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Author |
Proudman, C.; Pinchbeck, G.; Clegg, P.; French, N. |
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Title |
Equine welfare: risk of horses falling in the Grand National |
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Journal Article |
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Year |
2004 |
Publication |
Nature |
Abbreviated Journal |
Nature |
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Volume |
428 |
Issue ![sorted by Issue field, descending order (down)](img/sort_desc.gif) |
6981 |
Pages |
385-386 |
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Keywords |
Accidental Falls/prevention & control/*statistics & numerical data; Animal Welfare; Animals; Great Britain; Horse Diseases/prevention & control; Horses/*physiology; Odds Ratio; Risk Assessment; *Sports |
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Abstract |
As in other competitive sports, the famous Grand National steeplechase, which is held at Aintree in the United Kingdom and is watched by 600 million people worldwide, sometimes results in injury. By analysing data from the past 15 Grand National races (consisting of 560 starts by horses), we are able to identify several factors that are significantly associated with failure to complete the race: no previous experience of the course and its unique obstacles, unfavourable ground conditions (too soft or too hard), a large number of runners, and the length of the odds ('starting price'). We also find that there is an increased risk of falling at the first fence and at the jump known as Becher's Brook, which has a ditch on the landing side. Our findings indicate ways in which the Grand National could be made safer for horses and illustrate how epidemiological analysis might contribute to preventing injury in competitive sport. |
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Epidemiology Group, Faculty of Veterinary Science, University of Liverpool, Leahurst, Neston, Wirral CH64 7TE, UK. c.j.proudman@liverpool.ac.uk |
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1476-4687 |
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PMID:15042079 |
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no |
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refbase @ user @ |
Serial |
535 |
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Author |
Conradt, L.; Roper, T.J. |
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Title |
Group decision-making in animals |
Type |
Journal Article |
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Year |
2003 |
Publication |
Nature |
Abbreviated Journal |
Nature |
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Volume |
421 |
Issue ![sorted by Issue field, descending order (down)](img/sort_desc.gif) |
6919 |
Pages |
155-158 |
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Keywords |
Animals; Behavior, Animal/*physiology; *Decision Making; Democracy; Group Processes; *Models, Biological; Population Density; Social Behavior |
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Abstract |
Groups of animals often need to make communal decisions, for example about which activities to perform, when to perform them and which direction to travel in; however, little is known about how they do so. Here, we model the fitness consequences of two possible decision-making mechanisms: 'despotism' and 'democracy'. We show that under most conditions, the costs to subordinate group members, and to the group as a whole, are considerably higher for despotic than for democratic decisions. Even when the despot is the most experienced group member, it only pays other members to accept its decision when group size is small and the difference in information is large. Democratic decisions are more beneficial primarily because they tend to produce less extreme decisions, rather than because each individual has an influence on the decision per se. Our model suggests that democracy should be widespread and makes quantitative, testable predictions about group decision-making in non-humans. |
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School of Biological Sciences, University of Sussex, Brighton BN1 9QG, UK. l.conradt@sussex.ac.uk |
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0028-0836 |
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PMID:12520299 |
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Equine Behaviour @ team @ |
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5136 |
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Author |
Dyer, F.C. |
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Title |
Animal behaviour: when it pays to waggle |
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Year |
2002 |
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Nature |
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Nature |
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Volume |
419 |
Issue ![sorted by Issue field, descending order (down)](img/sort_desc.gif) |
6910 |
Pages |
885-886 |
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*Animal Communication; Animals; Bees/*physiology; California; Dancing/physiology; Environment; Evolution; Female; Flowers/chemistry; *Food; Gravitation; Lighting; Motor Activity/*physiology; Odors; Seasons; Sunlight |
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0028-0836 |
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PMID:12410290 |
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refbase @ user @ |
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769 |
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Author |
Wilson, A.M.; McGuigan, M.P.; Su, A.; van Den Bogert, A.J. |
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Title |
Horses damp the spring in their step |
Type |
Journal Article |
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Year |
2001 |
Publication |
Nature |
Abbreviated Journal |
Nature |
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Volume |
414 |
Issue ![sorted by Issue field, descending order (down)](img/sort_desc.gif) |
6866 |
Pages |
895-899 |
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Animals; Biomechanics; Elasticity; Forelimb; Gait; Horses/anatomy & histology/*physiology; Leg Bones/*physiology; Locomotion; Models, Biological; Muscle Fibers/physiology; Muscle, Skeletal/anatomy & histology/*physiology; Tendons/anatomy & histology/*physiology; Vibration |
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Abstract |
The muscular work of galloping in horses is halved by storing and returning elastic strain energy in spring-like muscle-tendon units.These make the legs act like a child's pogo stick that is tuned to stretch and recoil at 2.5 strides per second. This mechanism is optimized by unique musculoskeletal adaptations: the digital flexor muscles have extremely short fibres and significant passive properties, whereas the tendons are very long and span several joints. Length change occurs by a stretching of the spring-like digital flexor tendons rather than through energetically expensive length changes in the muscle. Despite being apparently redundant for such a mechanism, the muscle fibres in the digital flexors are well developed. Here we show that the mechanical arrangement of the elastic leg permits it to vibrate at a higher frequency of 30-40 Hz that could cause fatigue damage to tendon and bone. Furthermore, we show that the digital flexor muscles have minimal ability to contribute to or regulate significantly the 2.5-Hz cycle of movement, but are ideally arranged to damp these high-frequency oscillations in the limb. |
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Department of Veterinary Basic Sciences, The Royal Veterinary College, Hatfield, Herts AL9 7TA, UK. awilson@rvc.ac.uk |
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0028-0836 |
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PMID:11780059 |
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no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2300 |
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Author |
Whiten, A.; McGrew, W.C. |
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Title |
Is this the first portrayal of tool use by a chimp? |
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Year |
2001 |
Publication |
Nature |
Abbreviated Journal |
Nature |
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Volume |
409 |
Issue ![sorted by Issue field, descending order (down)](img/sort_desc.gif) |
6816 |
Pages |
12 |
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Animals; *Behavior, Animal; Pan troglodytes/*physiology; Philately |
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0028-0836 |
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PMID:11343083 |
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refbase @ user @ |
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739 |
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Author |
de Waal, F.B.; Berger, M.L. |
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Title |
Payment for labour in monkeys |
Type |
Journal Article |
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Year |
2000 |
Publication |
Nature |
Abbreviated Journal |
Nature |
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Volume |
404 |
Issue ![sorted by Issue field, descending order (down)](img/sort_desc.gif) |
6778 |
Pages |
563 |
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Animals; Cebus/*physiology; *Cooperative Behavior; Evolution; *Feeding Behavior; Female; Male; Reward |
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Living Links, Yerkes Regional Primate Research Center, and Department of Psychology, Emory University, Atlanta, Georgia 30329, USA. dewaal@emory.edu |
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0028-0836 |
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PMID:10766228 |
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refbase @ user @ |
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190 |
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Author |
Parr, L.A.; de Waal, F.B. |
![find record details (via OpenURL) openurl](img/xref.gif)
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Title |
Visual kin recognition in chimpanzees |
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Year |
1999 |
Publication |
Nature |
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Nature |
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399 |
Issue ![sorted by Issue field, descending order (down)](img/sort_desc.gif) |
6737 |
Pages |
647-648 |
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Animals; *Behavior, Animal; Face; Female; Male; Pan troglodytes/*physiology |
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0028-0836 |
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PMID:10385114 |
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refbase @ user @ |
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195 |
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Author |
de Waal, F.B. |
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Title |
Cultural primatology comes of age |
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Journal Article |
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Year |
1999 |
Publication |
Nature |
Abbreviated Journal |
Nature |
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Volume |
399 |
Issue ![sorted by Issue field, descending order (down)](img/sort_desc.gif) |
6737 |
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635-636 |
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Animals; *Behavior, Animal; *Culture; Humans; Pan troglodytes/*physiology |
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0028-0836 |
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PMID:10385107 |
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refbase @ user @ |
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196 |
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Whiten, A.; Goodall, J.; McGrew, W.C.; Nishida, T.; Reynolds, V.; Sugiyama, Y.; Tutin, C.E.; Wrangham, R.W.; Boesch, C. |
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Title |
Cultures in chimpanzees |
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Journal Article |
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Year |
1999 |
Publication |
Nature |
Abbreviated Journal |
Nature |
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Volume |
399 |
Issue ![sorted by Issue field, descending order (down)](img/sort_desc.gif) |
6737 |
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682-685 |
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Animals; *Behavior, Animal; Cognition; *Culture; Humans; Pan troglodytes/*physiology; Species Specificity |
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Abstract |
As an increasing number of field studies of chimpanzees (Pan troglodytes) have achieved long-term status across Africa, differences in the behavioural repertoires described have become apparent that suggest there is significant cultural variation. Here we present a systematic synthesis of this information from the seven most long-term studies, which together have accumulated 151 years of chimpanzee observation. This comprehensive analysis reveals patterns of variation that are far more extensive than have previously been documented for any animal species except humans. We find that 39 different behaviour patterns, including tool usage, grooming and courtship behaviours, are customary or habitual in some communities but are absent in others where ecological explanations have been discounted. Among mammalian and avian species, cultural variation has previously been identified only for single behaviour patterns, such as the local dialects of song-birds. The extensive, multiple variations now documented for chimpanzees are thus without parallel. Moreover, the combined repertoire of these behaviour patterns in each chimpanzee community is itself highly distinctive, a phenomenon characteristic of human cultures but previously unrecognised in non-human species. |
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Scottish Primate Research Group, School of Psychology, University of St Andrews, UK |
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0028-0836 |
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PMID:10385119 |
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refbase @ user @ |
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742 |
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Author |
Matsuzawa, T. |
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Title |
Use of numbers by a chimpanzee |
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Journal Article |
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Year |
1985 |
Publication |
Nature |
Abbreviated Journal |
Nature |
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Volume |
315 |
Issue ![sorted by Issue field, descending order (down)](img/sort_desc.gif) |
6014 |
Pages |
57-59 |
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Animals; Behavior, Animal/physiology; Cognition; Female; Mathematics; Pan troglodytes/*physiology |
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Abstract |
Recent studies have examined linguistic abilities in apes. However, although human mathematical abilities seem to be derived from the same foundation as those in language, we have little evidence for mathematical abilities in apes (but for exceptions see refs 7-10). In the present study, a 5-yr-old female chimpanzee (Pan troglodytes), 'Ai', was trained to use Arabic numerals to name the number of items in a display. Ai mastered numerical naming from one to six and was able to name the number, colour and object of 300 types of samples. Although no particular sequence of describing samples was required, the chimpanzee favoured two sequences (colour/object/number and object/colour/number). The present study demonstrates that the chimpanzee was able to describe the three attributes of the sample items and spontaneously organized the 'word order'. |
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0028-0836 |
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PMID:3990808 |
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Equine Behaviour @ team @ |
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2793 |
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