| Records |
| Author |
Harrington, F.H. |
Title  |
Aggressive howling in wolves |
Type |
Journal Article |
| Year |
1987 |
Publication |
Anim Behav |
Abbreviated Journal |
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| Volume |
35 |
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no |
| Call Number |
Equine Behaviour @ team @ Harrington1987 |
Serial |
6457 |
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| Author |
DOBRORUKA LJ et al, |
| Title |
An analysis of the population of Grevy's zebra |
Type |
Journal Article |
| Year |
1987 |
Publication |
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Abbreviated Journal |
Int Zoo Yb |
| Volume |
26 |
Issue |
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Pages |
290-293 |
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| Notes |
from Professor Hans Klingels Equine Reference List |
Approved |
no |
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Serial |
1018 |
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| Author |
Tizard I. |
| Title |
An introduction to veterinary immunology. |
Type |
Book Whole |
| Year |
1987 |
Publication |
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WB Saunders Co. |
Place of Publication |
Philadelphia |
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no |
| Call Number |
Equine Behaviour @ team @ |
Serial |
6000 |
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| Author |
Huntingford, F.; Turner, A. |
| Title |
Animal Conflict |
Type |
Miscellaneous |
| Year |
1987 |
Publication |
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no |
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Equine Behaviour @ team @ |
Serial |
4850 |
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| Author |
Terrace, H.S. |
| Title |
Chunking by a pigeon in a serial learning task |
Type |
Journal Article |
| Year |
1987 |
Publication |
Nature |
Abbreviated Journal |
Nature |
| Volume |
325 |
Issue |
7000 |
Pages |
149-151 |
| Keywords |
Animals; Cognition/*physiology; Columbidae/*physiology; Feedback; Learning/*physiology; Male |
| Abstract |
A basic principle of human memory is that lists that can be organized into memorable 'chunks' are easier to remember. Memory span is limited to a roughly constant number of chunks and is to a large extent independent of the amount of informaton contained in each chunk. Depending on the ingenuity of the code used to integrate discrete items into chunks, one can substantially increase the number of items that can be recalled correctly. Newly developed paradigms for studying memory in non-verbal organisms allow comparison of the abilities of human and non-human subjects to memorize lists. Here I present two types of evidence that pigeons 'chunk' 5-element lists whose components (colours and achromatic geometric forms) are clustered into distinct groups. Those lists were learned twice as rapidly as a homogeneous list of colours or heterogeneous lists in which the elements are not clustered. The pigeons were also tested for knowledge of the order of two elements drawn from the 5-element lists. They responded in the correct order only to those subsets that contained a chunk boundary. Thus chunking can be studied profitably in animal subjects; the cognitive processes that allow an organism to form chunks do no presuppose linguistic competence. |
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English |
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0028-0836 |
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| Notes |
PMID:3808071 |
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no |
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Equine Behaviour @ team @ |
Serial |
2792 |
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| Author |
Penzhorn Bl, L.P. |
| Title |
Comparisons of reproductive parameters of two Cape mountain zebra populations |
Type |
Journal Article |
| Year |
1987 |
Publication |
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Abbreviated Journal |
J Reprod Fert Suppl |
| Volume |
35 |
Issue |
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Pages |
661-663 |
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| Notes |
from Professor Hans Klingels Equine Reference List |
Approved |
no |
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Serial |
1462 |
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| Author |
Wasserman, S. |
| Title |
Conformity of two sociometric relations |
Type |
Journal Article |
| Year |
1987 |
Publication |
Psychometrika |
Abbreviated Journal |
Psychometrika |
| Volume |
52 |
Issue |
1 |
Pages |
3-18 |
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| Abstract |
Abstract The problem of comparing two sociometric relations or measurements (A andB) recorded in distinct sociomatrices was originally discussed by Katz and Powell in the early 1950's and Hubert and Baker in the late 1970's. The problem is considered again using a probabilistic model designed specifically for discrete-valued network measurements. The model allows for the presence of various structural tendencies, such as reciprocity and differential popularity. A parameter that isolates the tendency for actors to choose other actors on both relations simultaneously is introduced, and estimated conditional on the presence of other parameters that reflect additional important network properties. The parameter is presented as a symmetric index but is also generalized to the predictive (A onB orB onA) situation. This approach to the problem is illustrated with the same data used by the earlier solutions, and the unique nature of the two relations in the data set (A = received choices,B = perceived choices), as it affects the modeling, is discussed. Significance tests for the parameter and related parameters are described, as well as an extension to more than two relations. |
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no |
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Equine Behaviour @ team @ |
Serial |
5027 |
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| Author |
Penzhorn Bl, |
| Title |
Descriptions of incisors of known – age Cape Mountain Zebras from the Mountain Zebra National park |
Type |
Journal Article |
| Year |
1987 |
Publication |
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Abbreviated Journal |
Onderstepoort J vet Res |
| Volume |
54 |
Issue |
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Pages |
135-141 |
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| Notes |
from Professor Hans Klingels Equine Reference List |
Approved |
no |
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Serial |
1459 |
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| Author |
Mcinnis Ml, V.M. |
| Title |
Dietary relationships among feral horses, cattle, and pronhorn in southeastern Oregon |
Type |
Journal Article |
| Year |
1987 |
Publication |
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Abbreviated Journal |
J Range Mgmt |
| Volume |
40 |
Issue |
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Pages |
60-66 |
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| Notes |
from Professor Hans Klingels Equine Reference List |
Approved |
no |
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Serial |
1379 |
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| Author |
Drevemo, S.; Fredricson, I.; Hjertén, G.; McMIKEN, D. |
| Title |
Early development of gait asymmetries in trotting Standardbred colts |
Type |
Journal Article |
| Year |
1987 |
Publication |
Equine Veterinary Journal |
Abbreviated Journal |
Equine. Vet. J. |
| Volume |
19 |
Issue |
3 |
Pages |
189-191 |
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| Abstract |
Summary Ten trotting Standardbred colts were recorded by high-speed cinematography at the ages of eight, 12 and 18 months. The horses were trotting on a treadmill operating at 4.0 m/secs. Five horses were subjected to a programme of intensified training from eight months of age, whereas the others were not trained and acted as controls. The films were analysed on a semi-automatic film-reading equipment and a number of variables used to demonstrate the gait symmetry were calculated and scaled by computer. Certain differences between left and right diagonal and contralateral pair of limbs, respectively, were noted, suggesting that laterality in horses may be inherited. The most pronounced systematic differences were found in 18-month old horses in the trained group. The results show the importance of careful gait examination and comprehensive coordination training at an early age. |
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American Medical Association (AMA) |
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0425-1644 |
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| Notes |
https://doi.org/10.1111/j.2042-3306.1987.tb01373.x |
Approved |
no |
| Call Number |
Equine Behaviour @ team @ |
Serial |
6702 |
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