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| Author |
Povinelli DJ; Nelson KE; Boysen ST |
| Title |
Inferences about guessing and knowing in chimpanzees (Pan troglodytes) |
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Journal Article |
| Year |
1990 |
Publication |
J. Comp. Psychol. |
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| Volume |
104 |
Issue |
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Pages |
203 |
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Equine Behaviour @ team @ |
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3030 |
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| Author |
Visalberghi E |
| Title |
Tool use in Cebus |
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Journal Article |
| Year |
1990 |
Publication |
Folia Primatol. |
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| Volume |
54 |
Issue |
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Pages |
146 |
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Equine Behaviour @ team @ |
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3045 |
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| Author |
Holmstrom, M.; Magnusson, L.E.; Philipsson, J. |
| Title |
Variation in conformation of Swedish warmblood horses and conformational characteristics of elite sport horses |
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Journal Article |
| Year |
1990 |
Publication |
Equine Veterinary Journal |
Abbreviated Journal |
Equine Vet J |
| Volume |
22 |
Issue |
3 |
Pages |
186-193 |
| Keywords |
Age Factors; Analysis of Variance; Animals; *Breeding; Female; Forelimb/anatomy & histology; Hindlimb/anatomy & histology; Horses/*anatomy & histology/physiology; Least-Squares Analysis; Male; Physical Conditioning, Animal; Regression Analysis; Sex Characteristics |
| Abstract |
The variation in conformation of 356 Swedish Warmblood horses is described, using a quantitative method of measuring horses. Thirty-three of the horses were elite dressage horses, 28 were elite showjumpers, 100 were riding school horses and 195 were unselected four-year-olds. Most horses had a long body form. The average height at the withers was 163.4 cm. Sixty per cent of the horses had a bench knee conformation, 50 per cent had a toe-in conformation of the forelimbs and 80 per cent had outwardly rotated hind limbs. The majority of these deviations were mild or moderate. Conformation was influenced by sex and age. Mares were smaller and had longer bodies and shorter limbs. The elite dressage horses and showjumpers had larger hock angles and more sloping scapulas than other horses. The showjumpers also had smaller fetlock angles in the front limbs. It is suggested that the larger hock angles among the elite horses may be because hocks with small angles are more prone to injury, and because small hock angles may negatively influence the ability to attain the degree of collection necessary for good performance in advanced classes. |
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Department of Animal Hygiene, Faculty of Veterinary Medicine, Swedish University of Agricultural Sciences, Skara |
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English |
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0425-1644 |
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| Notes |
PMID:2361507 |
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Equine Behaviour @ team @ |
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3756 |
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| Author |
Hinrichs, K.; Watson, E.D.; Kenney, R.M. |
| Title |
Granulosa cell tumor in a mare with a functional contralateral ovary |
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Journal Article |
| Year |
1990 |
Publication |
Journal of the American Veterinary Medical Association |
Abbreviated Journal |
J Am Vet Med Assoc |
| Volume |
197 |
Issue |
8 |
Pages |
1037-1038 |
| Keywords |
Animals; Corpus Luteum/*physiopathology; Female; Granulosa Cell Tumor/pathology/physiopathology/*veterinary; Horse Diseases/*pathology/physiopathology; Horses; Ovarian Neoplasms/pathology/*veterinary; Ovary/*pathology/physiopathology |
| Abstract |
A functional corpus luteum was found in the ovary contralateral to the ovary with a granulosa cell tumor in a 24-year-old Standardbred mare. The mare was ovariectomized because she was to be used as a jump mare for collection of semen from stallions. The blood concentration of progesterone was 2.2 ng/ml, and the luteal tissue progesterone concentration was 6.3 micrograms/mg. Atrophy of the contralateral ovary is one of the major signs used in diagnosis of granulosa cell tumor; however, our findings indicate that the ovary contralateral to a granulosa cell tumor is not invariably nonfunctional. |
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Department of Medicine, School of Veterinary Medicine, Tufts University, North Grafton, MA 01536 |
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English |
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0003-1488 |
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PMID:2243036 |
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Equine Behaviour @ team @ |
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3802 |
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| Author |
Pettifor, R.A. |
| Title |
The effects of avian mobbing on a potential predator, the European kestrel, Falco tinnunculus |
Type |
Journal Article |
| Year |
1990 |
Publication |
Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
| Volume |
39 |
Issue |
5 |
Pages |
821-827 |
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| Abstract |
European kestrels were observed being mobbed by other birds on 63 occasions. Eleven species were involved, and in two instances mobs were composed of more than one species. Both flight-hunting and perch-hunting kestrels flew significantly further between their foraging positions when they were mobbed than when they were not mobbed; on average, mobbing resulted in flight-hunting kestrels moving 6[middle dot]8 times, and perch-hunting kestrels 2[middle dot]7 times, the mean distances moved by non-mobbed birds. The mean strike distance of perch-hunting kestrels attempting to capture birds was significantly less than the distance between perches flown by perch-hunting kestrels when mobbed. These data provide quantitative support for the assumption that mobbing causes a predator to vacate its immediate foraging area. The activity of the kestrels also influenced the frequency that they were mobbed, with kestrels that were flight-hunting being mobbed more than expected compared with ones that were perch-hunting. Kestrels were observed being mobbed throughout the year, and there was no discernible difference in their response to mobbing between seasons. These results are discussed in relation to current ideas on the functions of avian mobbing. |
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Equine Behaviour @ team @ |
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4091 |
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| Author |
Thouless, C.R. |
| Title |
Feeding competition between grazing red deer hinds |
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Journal Article |
| Year |
1990 |
Publication |
Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
| Volume |
40 |
Issue |
1 |
Pages |
105-111 |
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The effect of social rank on the feeding behaviour of female red deer, Cervus elaphus L., on the Isle of Rhum, Scotland, was investigated. Hinds were less likely to approach and more likely to leave the vicinity of other individuals if these hinds were dominant to them. Movements away by subordinates were more likely to involve a break from feeding. Feeding rate, as measured by bite rate, increased with distance from dominant neighbours, but was unaffected by the distance to subordinates. It appears that aggressive interactions had little direct effect on access to food. Instead, it is suggested that feeding competition in red deer hinds is largely a passive process, operating through the avoidance of conflict by subordinates. |
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Equine Behaviour @ team @ |
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4267 |
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| Author |
Potter, G.D.; Yeates, B.F. |
| Title |
Behavioral principles of training and management |
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Journal Article |
| Year |
1990 |
Publication |
The Horse, 2nd Edn |
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Pages |
665-682 |
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| Notes |
Cited By (since 1996): 4; Export Date: 21 October 2008 |
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no |
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Equine Behaviour @ team @ |
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4540 |
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| Author |
Sawaguchi, T.; Kudo, H. |
| Title |
Neocortical development and social structure in primates |
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Journal Article |
| Year |
1990 |
Publication |
Primates |
Abbreviated Journal |
Primates |
| Volume |
31 |
Issue |
2 |
Pages |
283-289 |
| Keywords |
Neocortex – Relative size – Allometry – Congeneric group – Social structure – Monogyny – Polygyny – Primates |
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Abstract  The relationships between the relative size of the neocortex and differences in social structures were examined in prosimians and anthropoids. The relative size of the neocortex (RSN) of a given congeneric group in each superfamily of primates was measured based on the allometric relationships between neocortical volume and brain weight for each superfamily, to control phylogenetic affinity and the effects of brain size. In prosimians, “troop-making†congeneric groups (N=3) revealed a significantly larger RSN than solitary groups (N=6), and there was a significant, positive correlation between RSN and troop size. In the case of anthropoids, polygynous/frugivorous groups (N=5) revealed a significantly larger RSN than monogynous/frugivorous groups (N=8). Furthermore, a significant, positive correlation between RSN and troop size was found for frugivorous congeneric groups of the Ceboidea. These results suggest that neocortical development is associated with differences in social structure among primates. |
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Equine Behaviour @ team @ |
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4799 |
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| Author |
Cheney, D.L.; Seyfarth, R.M. |
| Title |
How Monkeys See the World |
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Miscellaneous |
| Year |
1990 |
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Equine Behaviour @ team @ |
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4866 |
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| Author |
Cords, M. |
| Title |
13th Cong. Int. Primat Soc |
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Miscellaneous |
| Year |
1990 |
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Equine Behaviour @ team @ |
Serial |
4925 |
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