| Records |
Author  |
Graham, M.; Letz, R. |
| Title |
Within-species variation in the development of ultrasonic signaling of preweanling rats |
Type |
Journal Article |
| Year |
1979 |
Publication |
Developmental Psychobiology |
Abbreviated Journal |
Dev Psychobiol |
| Volume |
12 |
Issue |
2 |
Pages |
129-136 |
| Keywords |
Animals; *Animals, Newborn; Animals, Suckling; Body Weight; Cold/adverse effects; Environment; Genotype; Individuality; Object Attachment; Rats; Stress/*physiopathology; Ultrasonics; *Vocalization, Animal |
| Abstract |
The development of litter and individual differences in the rate of ultrasonic signaling of neonatal rats was studied. Systematic variations among litters and individuals emerged, without differential treatment. These differences were not correlated with variations in general development as indexed by body weight. Two experiments using a cross-fostering design showed that litter differences developed independently of variations in postnatal environment. These results indicate that the variations among litters in ultrasound rate have a prenatal, possibly genetic, etiology and may represent reliable indicants of response to environmental stress. |
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English |
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| ISSN |
0012-1630 |
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| Notes |
PMID:456751 |
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no |
| Call Number |
Equine Behaviour @ team @ |
Serial |
4172 |
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| Author |
Gates, S. |
| Title |
A Study of home ranges of free ranging Exmoore ponies |
Type |
Journal Article |
| Year |
1979 |
Publication |
Mammal Revision |
Abbreviated Journal |
Mamm. Rev. |
| Volume |
9 |
Issue |
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Pages |
:3-18 |
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no |
| Call Number |
refbase @ user @ |
Serial |
765 |
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| Author |
Gakahu Cg, |
| Title |
Strategies of feeding behavior in the Common zebra, Equus burchelli (Gray) in Amboseli National Park, Kenya (Abstract) |
Type |
Journal Article |
| Year |
1979 |
Publication |
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Abbreviated Journal |
Symposium on the Ecology and Behavior of wild and feral Equids, Laramie |
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Issue |
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Pages |
158 |
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| Notes |
from Professor Hans Klingels Equine Reference List |
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no |
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Serial |
1100 |
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| Author |
Fiske, J.C.; Potter, G.D. |
| Title |
Discrimination reversal learning in yearling horses |
Type |
Journal Article |
| Year |
1979 |
Publication |
J. Anim. Sci. |
Abbreviated Journal |
J. Anim. Sci. |
| Volume |
49 |
Issue |
2 |
Pages |
583-588 |
| Keywords |
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| Abstract |
Twenty-six yearling horses were tested on a serial reversal learning discrimination combining spatial and brightness cues. An original discrimination of rewarded or nonrewarded stimuli was made followed by 20 daily reversals for position/brightness discrimination. Learning criteria were defined as 11 out of 12 correct, with the last eight responses all correct. Each horse was allowed 30 trials per discrimination to achieve criteria. Mean errors (ME) and mean trials (MT) required to achieve criteria were computed for each horse. A relative learning ability index (LAI) was calculated by the formula 1000/MT/ME. A daily emotionality score, based on a scale of one (tranquil) to six (very excitable) was assigned each horse each day after testing and a mean computed for each horse. A single subjective trainability score, based on a scale of one (difficult to train) to six (easy to train) was obtained for each horse from an independent trainer. Linear regression analyses for all 26 horses revealed a reduction in MT and ME (P<.01) over the 21-day test period indicating evidence of learning to learn. Differences (P<.05) were evident between sexes for MT and ME. Significant correlations between trainability scores and learning ability indices MT, ME, and LAI were evident for colts and geldings but not for fillies. Pooled data showed significant correlations between ME and trainability. There was a negative correlation (P<.05) between emotionality and trainability scores for all 26 horses, although the filly group did not exhibit significant correlation between these parameters. |
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| Notes |
Cited By (since 1996): 31; Export Date: 24 October 2008 |
Approved |
no |
| Call Number |
Admin @ knut @ |
Serial |
4583 |
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| Author |
Fiske, J.C. |
| Title |
Behavior and learning in horses Applications in management and training |
Type |
Journal Article |
| Year |
1979 |
Publication |
Southwestern Veterinarian |
Abbreviated Journal |
Southwestern Veterinarian |
| Volume |
32 |
Issue |
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Pages |
37-44 |
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no |
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Equine Behaviour @ team @ |
Serial |
3568 |
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| Author |
Fedak Ma, S.H. |
| Title |
Reappraisal of energetics of locomotion shows identical cost in bipeds and quadrupeds including ostrich and horse |
Type |
Journal Article |
| Year |
1979 |
Publication |
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Abbreviated Journal |
Nature |
| Volume |
282 |
Issue |
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Pages |
713-716 |
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| Notes |
from Professor Hans Klingels Equine Reference List |
Approved |
no |
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Serial |
1079 |
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| Author |
Eisenmann V, |
| Title |
Etude des cornets des dents incisives infürieures des Equuq actuels et fossiles |
Type |
Journal Article |
| Year |
1979 |
Publication |
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Abbreviated Journal |
Paleont Italica |
| Volume |
71 |
Issue |
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Pages |
55-75 |
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| Notes |
from Professor Hans Klingels Equine Reference List |
Approved |
no |
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Serial |
1049 |
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| Author |
Eisenmann V, |
| Title |
Les métapodes d`Equus sensu lato. |
Type |
Journal Article |
| Year |
1979 |
Publication |
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Abbreviated Journal |
Géobios |
| Volume |
12 |
Issue |
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Pages |
863-886 |
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| Notes |
from Professor Hans Klingels Equine Reference List |
Approved |
no |
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Serial |
1050 |
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| Author |
Eisenmann V, |
| Title |
Paléontologie – Caractères évolutifs du genre Equus. |
Type |
Journal Article |
| Year |
1979 |
Publication |
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Abbreviated Journal |
C R Acad Sc Paris |
| Volume |
288 |
Issue |
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Pages |
497-500 |
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| Notes |
from Professor Hans Klingels Equine Reference List |
Approved |
no |
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Serial |
1051 |
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| Author |
Duncan, P.; Vigne, N. |
| Title |
The effect of group size in horses on the rate of attacks by blood-sucking flies |
Type |
Journal Article |
| Year |
1979 |
Publication |
Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
| Volume |
27 |
Issue |
Part 2 |
Pages |
623-625 |
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Approved |
no |
| Call Number |
refbase @ user @ |
Serial |
763 |
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