| Records |
| Author |
de Waal, F.B. |
| Title |
Macaque social culture: development and perpetuation of affiliative networks |
Type |
Journal Article |
| Year |
1996 |
Publication |
Journal of comparative psychology (Washington, D.C. : 1983) |
Abbreviated Journal |
J Comp Psychol |
| Volume |
110 |
Issue |
2 |
Pages |
147-154 |
| Keywords |
Animals; Dominance-Subordination; Female; Macaca mulatta/*psychology; Male; Maternal Behavior; *Peer Group; Sexual Behavior, Animal; *Social Behavior; Social Distance; *Social Environment |
| Abstract |
Maternal affiliative relations may be transmitted to offspring, similar to the way in which maternal rank determines offspring rank. The development of 23 captive female rhesus monkeys (Macaca mulatta) was followed from the day of birth until adulthood. A multivariate analysis compared relations among age peers with affiliative relations, kinship, and rank distance among mothers. Maternal relations were an excellent predictor of affiliative relations among daughters, explaining up to 64% of the variance. Much of this predictability was due to the effect of kinship. However, after this variable had been controlled, significant predictability persisted. For relations of female subjects with male peers, on the other hand, maternal relations had no significant predictive value beyond the effect of kinship. One possible explanation of these results is that young rhesus females copy maternal social preferences through a process of cultural learning. |
| Address |
Department of Psychology, Emory University, Atlanta, Georgia 30322, USA. dewaal@rmy.emory.edu |
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English |
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Edition |
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| ISSN |
0735-7036 |
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Notes  |
PMID:8681528 |
Approved |
no |
| Call Number |
refbase @ user @ |
Serial |
204 |
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| Author |
Atwill, E.R.; Mohammed, H.O.; Lopez, J.W. |
| Title |
Evaluation of travel and use as a risk factor for seropositivity to Ehrlichia risticii in horses of New York state |
Type |
Journal Article |
| Year |
1996 |
Publication |
American Journal of Veterinary Research |
Abbreviated Journal |
Am J Vet Res |
| Volume |
57 |
Issue |
3 |
Pages |
272-277 |
| Keywords |
Animals; Cross-Sectional Studies; Ehrlichiosis/epidemiology/*veterinary; Female; *Horse Diseases; Horses; Male; New York/epidemiology; Probability; Random Allocation; Risk Factors; *Travel |
| Abstract |
OBJECTIVES--To determine whether mean annual frequency and destination of equine travel was associated with exposure to Ehrlichia risticii and whether these associations were modified by horses' place of residence. DESIGN--Cross-sectional study. SAMPLE POPULATION--511 equine operations containing 2,587 horses were visited in New York state from a target population of 39,000 operations. PROCEDURE--Each horse was tested for serum antibodies against E risticii, using indirect fluorescent antibody. Information on the horse's travel history, farm's management practices, and surrounding ecology was obtained by personal interview and resource maps. Statistical analyses were performed on 2 cohorts of animals: all horses enrolled in the study and horses born on the property or that resided at least 4 years on the farm. Three county-based risk regions (RR) were identified by use of cluster analysis. RESULTS--Mean seroprevalence for each of the 3 RR was 2.4 (low risk), 8.5 (moderate risk), and 18.5% (high risk) for cohort 1 and 2.5, 8.0, and 18.4% for cohort 2. Among cohorts 1 and 2, pleasure riding and breeding trips were associated with exposure to E risticii, but horse residence (low, moderate, or high RR) was an effect modifier for these associations. Among cohort 1 and stratifying the analysis according to the RR for the travel destination, trail riding at low RR and trail riding at high RR were associated with exposure. Among cohort 2 and stratifying the analysis according to the RR for the travel destination, breeding trips were associated with exposure, and strong effect modification was present for horse residence (low, moderate, or high RR). CONCLUSIONS--Only certain types of travel to specific RR were associated with higher risk of exposure to E risticii. In many instances, travel was not associated, or was associated, with a reduced risk of exposure. |
| Address |
Department of Clinical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA |
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English |
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| ISSN |
0002-9645 |
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| Notes |
PMID:8669754 |
Approved |
no |
| Call Number |
Equine Behaviour @ team @ |
Serial |
2658 |
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| Author |
Adler, L.L.; Adler, H.E. |
| Title |
Ontogeny of observational learning in the dog (Canis familiaris) |
Type |
Journal Article |
| Year |
1977 |
Publication |
Developmental Psychobiology |
Abbreviated Journal |
Dev Psychobiol |
| Volume |
10 |
Issue |
3 |
Pages |
267-271 |
| Keywords |
Animals; Dogs/*physiology; Female; Learning/*physiology; Male; Vision, Ocular/physiology |
| Abstract |
A split-litter technique was used to test observational learning in 4 litters of Miniature Dachshund puppies, 21, 28, 38, and 60 days old at the beginning of the experiment. In one side of a duplicate cage, one puppy of a litter, the demonstrator, learned to pull in a food cart on a runner by means of a ribbon, while another puppy, the observer, watched from an adjacent compartment, separated by a wire screen. Observational learning was demonstrated by the saving in time for the 1st trial when the observer was given the same problem to solve. Maturation, particularly the development of visual function and motor coordination, set a lower age limit for the emergence of observational learning. |
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English |
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Edition |
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| ISSN |
0012-1630 |
ISBN |
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Conference |
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| Notes |
PMID:863122 |
Approved |
no |
| Call Number |
Equine Behaviour @ team @ |
Serial |
5186 |
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| Author |
Pere, M.C. |
| Title |
Maternal and fetal blood levels of glucose, lactate, fructose, and insulin in the conscious pig |
Type |
Journal Article |
| Year |
1995 |
Publication |
Journal of Animal Science |
Abbreviated Journal |
J. Anim Sci. |
| Volume |
73 |
Issue |
10 |
Pages |
2994-2999 |
| Keywords |
Animals; Blood Glucose/*analysis; Catheterization/methods/veterinary; Consciousness/physiology; Female; Fetal Blood/*chemistry; Fructose/analysis/*blood; Insulin/analysis/*blood; Lactates/analysis/*blood; Pregnancy; Swine/*blood/physiology |
| Abstract |
To study nutrition and metabolism in the fetal pig, a chronic catheterization method was developed that allows blood sampling in arteries and veins, at both the umbilical and uterine sources, in the conscious, unstressed animal. A catheter was inserted in the fetal aorta through a femoral artery, and another one was introduced in the umbilical vein. A catheter was put in a femoral artery of the sow so that its end was in the abdominal aorta. A fourth catheter was placed in a uterine vein draining the fetoplacental unit studied. This procedure was applied to 18 Large White primiparous sows at 99 d of gestation. Blood samples were drawn simultaneously using the four catheters before a meal at 103 d of pregnancy, and glucose, insulin, lactate, and fructose were determinated. Glycemia was 2.5 times higher in the sow than in the fetus. The extraction coefficient of glucose by the fetus amounted to 14% of the umbilical supply. The insulin level in the fetal pig was very low ( < 5 microU/mL). Lactate and fructose seemed to originate from the placenta. Blood lactate was 2.6 times lower in the sow than in the fetus, and its extraction coefficient by the fetus amounted to 8%. Fructose in the fetal blood was 2.3 times higher than that of glucose. Fructose was not utilized by the pig fetus. The present results obtained in the fetal pig are comparable to the conclusions drawn from studies with other species. |
| Address |
Station de Recherches Porcines, Institut National de la Recherche Agronomique, Saint-Gilles, France |
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English |
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Edition |
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| ISSN |
0021-8812 |
ISBN |
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Conference |
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| Notes |
PMID:8617670 |
Approved |
no |
| Call Number |
Equine Behaviour @ team @ |
Serial |
2751 |
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| Author |
Boysen, S.T.; Bernston, G.G.; Hannan, M.B.; Cacioppo, J.T. |
| Title |
Quantity-based interference and symbolic representations in chimpanzees (Pan troglodytes) |
Type |
Journal Article |
| Year |
1996 |
Publication |
Journal of Experimental Psychology. Animal Behavior Processes |
Abbreviated Journal |
J Exp Psychol Anim Behav Process |
| Volume |
22 |
Issue |
1 |
Pages |
76-86 |
| Keywords |
Animals; Behavior, Animal; Cognition; *Discrimination Learning; Female; Male; *Pan troglodytes; *Reinforcement (Psychology); Task Performance and Analysis |
| Abstract |
Five chimpanzees with training in counting and numerical skills selected between 2 arrays of different amounts of candy or 2 Arabic numerals. A reversed reinforcement contingency was in effect, in which the selected array was removed and the subject received the nonselected candies (or the number of candies represented by the nonselected Arabic numeral). Animals were unable to maximize reward by selecting the smaller array when candies were used as array elements. When Arabic numerals were substituted for the candy arrays, all animals showed an immediate shift to a more optimal response strategy of selecting the smaller numeral, thereby receiving the larger reward. Results suggest that a response disposition to the high-incentive candy stimuli introduced a powerful interference effect on performance, which was effectively overridden by the use of symbolic representations. |
| Address |
Ohio State University, Department of Psychology, Ohio State University, Columbus 43210-1222, USA |
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English |
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Edition |
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| ISSN |
0097-7403 |
ISBN |
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Expedition |
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Conference |
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| Notes |
PMID:8568498 |
Approved |
no |
| Call Number |
Equine Behaviour @ team @ |
Serial |
2781 |
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| Author |
Zentall, T.R.; Sherburne, L.M.; Roper, K.L.; Kraemer, P.J. |
| Title |
Value transfer in a simultaneous discrimination appears to result from within-event pavlovian conditioning |
Type |
Journal Article |
| Year |
1996 |
Publication |
Journal of experimental psychology. Animal behavior processes |
Abbreviated Journal |
J Exp Psychol Anim Behav Process |
| Volume |
22 |
Issue |
1 |
Pages |
68-75 |
| Keywords |
Animals; Behavior, Animal; Columbidae; *Conditioning, Classical; *Discrimination Learning; Female; Male; *Reinforcement (Psychology) |
| Abstract |
When pigeons acquire a simple simultaneous discrimination, some of the value acquired by the S+ transfers to the S-. The mechanism underlying this transfer of value was examined in three experiments. In Experiment 1, pigeons trained on two simultaneous discriminations (A + B- and C +/- D-) showed a preference for B over D. This preference was reduced, however, following the devaluation of A. In Experiment 2, when after the same original training, value was given to D, the pigeons' preference for C did not significantly increase. In Experiment 3, when both discriminations involved partial reinforcement (S +/-), A + C- training resulted in a preference for B over D, whereas B + D- training resulted in a preference for A over C. Thus, simultaneous discrimination training appears to result in bidirectional within-event conditioning involving the S+ and S-. |
| Address |
Department of Psychology, University of Kentucky Lexington 40506, USA |
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English |
Summary Language |
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Abbreviated Series Title |
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Edition |
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0097-7403 |
ISBN |
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Conference |
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| Notes |
PMID:8568497 |
Approved |
no |
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refbase @ user @ |
Serial |
255 |
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| Author |
Clayton, H.M. |
| Title |
Comparison of the stride kinematics of the collected, working, medium and extended trot in horses |
Type |
Journal Article |
| Year |
1994 |
Publication |
Equine Veterinary Journal |
Abbreviated Journal |
Equine Vet J |
| Volume |
26 |
Issue |
3 |
Pages |
230-234 |
| Keywords |
Analysis of Variance; Animals; Biomechanics; Female; Forelimb/anatomy & histology/physiology; Gait/*physiology; Hindlimb/anatomy & histology/physiology; Horses/anatomy & histology/*physiology; Locomotion/physiology; Male; Motion Pictures |
| Abstract |
Highly-trained dressage horses were studied to test the hypothesis that stride length is altered independently of stride duration in the transitions between the collected, working, medium and extended trot. Six well-trained dressage horses were filmed at a frame rate of 150 frames/s performing the collected, working, medium and extended trots in a sand arena. Temporal, linear and angular data were extracted from the films, with 4 strides being analysed for each horse and gait type. There were no significant asymmetries between the left and rights limbs or diagonals when data from the whole group were pooled, but 3 horses showed asymmetries in one or more variables (P < 0.01). Analysis of variance and post-hoc tests indicated that the speed increased significantly (P < 0.01) from the collected (3.20 m/s) to the working (3.61 m/s) to the medium (4.47 m/s) to the extended (4.93 m/s) trot. The increases in speed were associated with a significant increase in stride length from 250 cm in the collected trot, to 273 cm in the working trot, 326 cm in the medium trot and 355 cm in the extended trot (P < 0.01). The lengthening of the stride was a result of increases between each gait type in the over-reach distance, whereas the diagonal distance was significantly longer in the extended than the collected trot only (P < 0.01). The stride duration tended to decrease as speed increased, and the difference became significant between the collected and extended trots (P < 0.01). |
| Address |
Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, Canada |
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English |
Summary Language |
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Abbreviated Series Title |
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Edition |
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| ISSN |
0425-1644 |
ISBN |
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| Notes |
PMID:8542844 |
Approved |
no |
| Call Number |
Equine Behaviour @ team @ |
Serial |
3746 |
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| Author |
Madigan, J.E.; Kortz, G.; Murphy, C.; Rodger, L. |
| Title |
Photic headshaking in the horse: 7 cases |
Type |
Journal Article |
| Year |
1995 |
Publication |
Equine Veterinary Journal |
Abbreviated Journal |
Equine Vet J |
| Volume |
27 |
Issue |
4 |
Pages |
306-311 |
| Keywords |
Animals; Anti-Allergic Agents/therapeutic use; *Behavior, Animal; Cyproheptadine/therapeutic use; Female; *Head; Horse Diseases/drug therapy/*etiology; Horses; Light/*adverse effects; Male; Movement Disorders/drug therapy/etiology/*veterinary |
| Abstract |
Seven horses with headshaking are described. No physical abnormalities were detected in any of the cases. Six of these horses had onset of clinical signs in the spring. The role of light was assessed by application of a blindfold or dark grey lens to the eyes, covering the eyes with a face mask and observing the horse in total darkness outdoors. Cessation of headshaking was observed with blindfolding (5/5 horses), night darkness outdoors (4/4 horses) and use of grey lenses (2/3 horses). Outdoor behaviour suggested efforts to avoid light in 4/4 cases. The photic sneeze in man is suggested as a putative mechanism for equine headshaking. Five of 7 horses had improvement with cyproheptadine treatment (0.3 mg/kg bwt b.i.d.). Headshaking developed within 2 calendar weeks of the same date for 3 consecutive years in one horse. Neuropharmacological alterations associated with photoperiod mechanisms leading to optic trigeminal summation are suggested as possible reasons for spring onset of headshaking. |
| Address |
Department of Medicine and Epidemiology, School of Veterinary Medicine, University of California-Davis 95616-8737, USA |
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English |
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Edition |
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0425-1644 |
ISBN |
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Conference |
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| Notes |
PMID:8536668 |
Approved |
no |
| Call Number |
refbase @ user @ |
Serial |
1940 |
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| Author |
Holmstrom, M.; Fredricson, I.; Drevemo, S. |
| Title |
Biokinematic effects of collection on the trotting gaits in the elite dressage horse |
Type |
Journal Article |
| Year |
1995 |
Publication |
Equine Veterinary Journal |
Abbreviated Journal |
Equine Vet J |
| Volume |
27 |
Issue |
4 |
Pages |
281-287 |
| Keywords |
Animals; Biomechanics; Female; Gait/*physiology; Horses/*physiology; Kinesics; Male; Video Recording |
| Abstract |
Trot in hand, working trot, collected trot, passage and piaffe of 6 Grand Prix dressage horses were recorded by high speed film (250 frames/s). Angular patterns and hoof trajectories of the left fore- and hindlimbs were analysed and presented as mean and standard deviation (s.d.) curves. Speed and stride length decreased and fore- and hind stance phase durations increased with collection resulting in no suspension in piaffe. The diagonal advanced placement was positive in all gaits except for piaffe. Most of the changes in forelimb angular patterns were effects of reduction in forelimb pendulation. The horses did not step under themselves more in collected trot, passage and piaffe than in trot in hand. The stifle and hock joints were more flexed at the start of the stance phase in piaffe and passage than in the other gaits. Flexion of the hock joint at the middle of the stance phase was largest in passage and piaffe. In spite of the limited number of horses the present study confirmed earlier observations of conformation and gaits in dressage horses. Hindlimb pendulation, femur and pelvis inclinations and elbow, carpal, stifle and hock joint angles seem to be the most significant angular measurements for dressage performance. |
| Address |
Swedish National Stud, Flyinge |
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English |
Summary Language |
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Abbreviated Series Title |
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Series Issue |
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Edition |
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0425-1644 |
ISBN |
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Conference |
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| Notes |
PMID:8536664 |
Approved |
no |
| Call Number |
Equine Behaviour @ team @ |
Serial |
3742 |
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| Author |
Krebs, J.R.; Clayton, N.S.; Hampton, R.R.; Shettleworth, S.J. |
| Title |
Effects of photoperiod on food-storing and the hippocampus in birds |
Type |
Journal Article |
| Year |
1995 |
Publication |
Neuroreport |
Abbreviated Journal |
Neuroreport |
| Volume |
6 |
Issue |
12 |
Pages |
1701-1704 |
| Keywords |
Animals; Birds; Eating/*physiology; Female; Hippocampus/*physiology; Light; Male; *Photoperiod; Seasons; Telencephalon/physiology; Time Factors |
| Abstract |
Birds that store food have a relatively large hippocampus compared to non-storing species. The hippocampus shows seasonal differences in neurogenesis and volume in black-capped chikadees (Parus atricapillus) taken from the wild at different times of year. We compared hippocampal volumes in black-capped chickadees captured at the same time but differing in food-storing behaviour because of manipulations of photoperiod in the laboratory. Differences in food-storing behaviour were not accompanied by differences in the volume of the hippocampus. Hippocampal volumes also did not differ between two groups of a non-food-storing control species, house sparrows (Passer domesticus), exposed to the same conditions as the chickadees. |
| Address |
Edward Grey Institute of Field Ornithology, Department of Zoology, Oxford, UK |
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English |
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Series Issue |
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Edition |
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0959-4965 |
ISBN |
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Expedition |
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Conference |
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| Notes |
PMID:8527745 |
Approved |
no |
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refbase @ user @ |
Serial |
378 |
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