| Records |
| Author |
Hamilton, C.R.; Vermeire, B.A. |
Title  |
Complementary hemispheric specialization in monkeys |
Type |
Journal Article |
| Year |
1988 |
Publication |
Science |
Abbreviated Journal |
Science |
| Volume |
242 |
Issue |
4886 |
Pages |
1691-1694 |
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| Abstract |
Twenty-five split-brain monkeys were taught to discriminate two types of visual stimuli that engage lateralized cerebral processing in human subjects. Differential lateralization for the two kinds of discriminations was found; the left hemisphere was better at distinguishing between tilted lines and the right hemisphere was better at discriminating faces. These results indicate that lateralization of cognitive processing appeared in primates independently of language or handedness. In addition, cerebral lateralization in monkeys may provide an appropriate model for studying the biological basis of hemispheric specialization. |
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Equine Behaviour @ team @ |
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5342 |
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| Author |
Dukas, Reuven (ed) |
| Title |
Cognitive Ecology |
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Book Whole |
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1988 |
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University of Chicago Press. |
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Chicago |
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Dukas, Reuven |
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no |
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Equine Behaviour @ team @ |
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5464 |
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| Author |
Wimmer H; Hogrefe GJ; Perner J |
| Title |
Children's understanding of informational access as a source of knowledge |
Type |
Journal Article |
| Year |
1988 |
Publication |
Child Dev. |
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| Volume |
59 |
Issue |
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Pages |
386 |
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Equine Behaviour @ team @ |
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3050 |
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| Author |
Tilson, R.L.; Sweeny, K.A.; Binczik, G.A.; Reindl, N.J. |
| Title |
Buddies and bullies: Social structure of a bachelor group of Przewalski horses |
Type |
Journal Article |
| Year |
1988 |
Publication |
Applied Animal Behaviour Science |
Abbreviated Journal |
Appl. Anim. Behav. Sci. |
| Volume |
21 |
Issue |
1-2 |
Pages |
169-185 |
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| Abstract |
The Minnesota Zoological Garden established a bachelor (i.e. all-male) group of 8 Przewalski horses (Equus przewalskii) in 1984. Possible methods for mixing males emerged through preliminary introductions and review of the relevant literature. These included: (1) grouping colts (<=3 years old) after removing them from their natal bands; (2) introducing adult stallions to colts in spacious, controlled environments to reduce the risk of combat-related injury or death associated with largely unpredictable adult temperament; (3) introducing more than 1 animal at a time to established groups. Based on the frequency and orientation of agonistic interactions observed among the bachelors, a linear dominance hierarchy was discerned among the 4 adult stallions; all 4 colts were determined to be of equally low or seemingly non-ranking status. Social rank among the adults was most influenced by individual temperament, and contention for rank was limited almost exclusively to the 3 lower-ranking stallions; the alpha male participated in 73% of all agonistic interactions observed, but was identified as the recipient in less than 3% of these interactions. Intra-band associations were detected in the bachelor group. The most prevalent of these was among the 4 colts, found together in over 70% of the observations. Other affinities commonly observed were between the colts (as a sub-group) and different stallions. The dominant stallion, the colts' most frequent companion, actively discouraged the 3 lower-ranking stallions from associating with the colts. Further, the colts were subjected to significantly fewer agonistic behaviors than the non-alpha stallions (per colt=1.05+/-0.24 h-1; per non-alpha stallion=2.01+/-0.04 h-1). These findings support the hypothesis developed by other workers for ungulates that young bachelors are sheltered from aggression by association with an alpha male. With one exception, adult associations were rarely noted. Although combat-related injuries (superficial wounds and temporary lameness) were common among the bachelors, few required medical attention. No permanent disabilities or deaths have occurred since the group's inception. The existence of social organization and intra-band associations in the bachelor group support the suggestion that such groups were once a natural part of this species' social milieu. Bachelor groups are therefore recommended as an ethologically sound, space- and cost-effective means of managing “surplus” (i.e. non-harem) male Przewalski horses. |
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no |
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refbase @ user @ |
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781 |
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| Author |
Smielowski, J. |
| Title |
Breeding of the Grevy's Zebra at Polish zoological gardens |
Type |
Journal Article |
| Year |
1988 |
Publication |
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Abbreviated Journal |
Przeglad Zool |
| Volume |
32 |
Issue |
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Pages |
595-597 |
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| Notes |
from Professor Hans Klingels Equine Reference List |
Approved |
yes |
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Serial |
1608 |
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| Author |
KOTERBA AM et al, |
| Title |
Brathing strategy of the adult horse at rest |
Type |
Journal Article |
| Year |
1988 |
Publication |
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Abbreviated Journal |
J Appl Physiol |
| Volume |
64 |
Issue |
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Pages |
337-346 |
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from Professor Hans Klingels Equine Reference List |
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no |
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1327 |
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| Author |
Shaw, E.B.; Houpt, K.A.; Holmes, D.F. |
| Title |
Body temperature and behaviour of mares during the last two weeks of pregnancy |
Type |
Journal Article |
| Year |
1988 |
Publication |
Equine veterinary journal |
Abbreviated Journal |
Equine Vet J |
| Volume |
20 |
Issue |
3 |
Pages |
199-202 |
| Keywords |
Animals; *Behavior, Animal; *Body Temperature; Circadian Rhythm; Eating; Female; Horses/*physiology; Labor, Obstetric/*physiology; Motor Activity; Pregnancy; Pregnancy, Animal/*physiology |
| Abstract |
Average daily core body temperature and behavioural patterns of pregnant mares were studied, in search of definitive signs of parturition within 24 h of the event. Nineteen pony mares were sampled twice daily for core body temperature. A significant temperature drop, averaging 0.1 degrees C (0.2 degrees F) was observed during the day prior to parturition. Between 18.00 h and 06.00 h, during the two weeks before parturition, Thoroughbred and Standardbred mares (n = 52) spent an average 66.8 per cent of their time standing, 27.0 per cent eating, 4.9 per cent lying in sternal recumbency, 1.0 per cent lying in lateral recumbency, and 0.3 per cent walking. On the night before parturition, mares spent significantly less time lying in sternal recumbency than on previous nights and on the night of parturition all behaviour patterns except eating were significantly different from the nights of the two weeks before parturition. There was an increase in walking (5.3 per cent), lying in sternal recumbency (8 per cent) and lying in lateral recumbency (5.3 per cent) whereas standing (53.3 per cent) was decreased. In 58 observed pregnancies, 54 mares (97 per cent) foaled in a recumbent position and 50 mares (86 per cent) foaled between 18.00 h and 06.00 h. |
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Department of Physiology, New York State College of Veterinary Medicine, Cornell University, Ithaca 14853 |
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0425-1644 |
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| Notes |
PMID:3402416 |
Approved |
no |
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refbase @ user @ |
Serial |
46 |
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| Author |
Carroll, C.L.; Huntington, P.J. |
| Title |
Body condition scoring and weight estimation of horses |
Type |
Journal Article |
| Year |
1988 |
Publication |
Equine veterinary journal |
Abbreviated Journal |
Equine Vet J |
| Volume |
20 |
Issue |
1 |
Pages |
41-45 |
| Keywords |
Animals; Biometry; *Body Weight; Female; Horses/*anatomy & histology; Male; Physical Examination/*veterinary |
| Abstract |
Three hundred and seventy two horses of varying breeds, height and fatness were weighed and measured for height at the withers. They were assessed for condition score by adaptation of a previously published method. The heart girth and length of 281 of the horses were also measured. Weight of horses was highly correlated (P less than 0.001) with height (r2 = 0.62), condition score (r2 = 0.22) and girth2 x length (r2 = 0.90). Nomograms were constructed to predict weight from height and condition score, and girth and length measurements. Weight can also be accurately estimated from the formula: (formula, see text) The average value of 'Y' in this experiment was 11900 and this estimated weight with more accuracy than some previously published values of 'Y'. Racing Thoroughbred horses were found to be significantly lighter than non-racing Thoroughbreds of the same height and condition score. The method of assessment of condition score was shown to be repeatable between different operators with varying degrees of experience. |
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Department of Agriculture and Rural Affairs, Attwood Veterinary Research Laboratory, Westmeadows, Victoria, Australia |
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0425-1644 |
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PMID:3366105 |
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no |
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1808 |
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| Author |
Jenks, S. M. |
| Title |
Behavioral regulation of social organization and mating in a captive wolf pack |
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Manuscript |
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1988 |
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Ph.D. thesis |
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Univ. Conn. Dept. Biobehavioral Sci |
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no |
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Equine Behaviour @ team @ |
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5237 |
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| Author |
Mackintosh, N.J. |
| Title |
Approaches to the study of animal intelligence |
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Journal Article |
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1988 |
Publication |
British Journal of Psychology |
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79 |
Issue |
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509-525 |
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Cited By (since 1996): 17; Export Date: 24 October 2008 |
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no |
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Admin @ knut @ |
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4607 |
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