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Author |
Duncan, P. |
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Title |
Determinants of the use of habitat by horses in a mediterranean wetland |
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Year |
1983 |
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Abbreviated Journal  |
J. Anim. Ecol. |
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52 |
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93-109 |
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Notes |
from Professor Hans Klingels Equine Reference List |
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no |
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Call Number |
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Serial |
1031 |
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Author |
Kirkpatrick, J. F.; Turner, J. W. |
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Title |
Seasonal ovarian function in feral mares: seasonal patterns of LH, progestins and estrogens in feral mares |
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Journal Article |
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Year |
1983 |
Publication |
Journal of Equine Veterinary Science |
Abbreviated Journal |
J. Equine Vet. Sci. |
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Volume |
3 |
Issue |
4 |
Pages |
113-118 |
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Blood was collected every 3 days for 13 months from 4 captured [female][female] of proven fertility kept adjacent to a teaser stallion. Basal plasma LH level was greater during Apr.-July (8.1+or-0.5 ng/ml) than during Nov.-Jan. (2.2+or-0.2). A total for 21 LH peaks occurred between 13 Apr. and 31 Aug. among the 4 [female][female]; many peaks exceeded 20 times the basal level, and there was a trend to a higher LH level with each succeeding peak. On all occasions except one, LH peaks were associated with progesterone levels of 0.5 ng/ml and with increases of oestrogen (peak average 43.1+or-12.1 pg/ml). Basal progesterone level during Apr.-July (1.5+or-1.2 ng/ml) did not differ significantly from that during Oct.-Jan. (1.1+or-0.7), nor did basal oestrogen level differ significantly between those 2 periods (8.4+or-3.2 and 12.9+or-4.6 pg/ml resp.). Behavioural oestrus always occurred with LH and oestrogen peaks during Apr.-July. However, behavioural oestrus was occasionally observed during Aug.-Oct., when LH peaks no longer occurred. |
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Equine Behaviour @ team @ |
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2325 |
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Author |
Kaseda Y, |
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Title |
Seasonal changes in the home range and the size of harem groups of Misaki horses |
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Journal Article |
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Year |
1983 |
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Abbreviated Journal |
Jpn J Zootech Sci |
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Volume |
54 |
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Pages |
254-262 |
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from Professor Hans Klingels Equine Reference List |
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no |
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1234 |
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Author |
Kaseda Y, |
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Title |
Seasonal changes in time spent grazing and resting of Misaki horses |
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Journal Article |
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Year |
1983 |
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Abbreviated Journal |
Jpn J Zootechn Sci |
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Volume |
54 |
Issue |
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Pages |
464-469 |
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from Professor Hans Klingels Equine Reference List |
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no |
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1235 |
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Author |
Grobler, J. H. |
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Title |
Feeding habits of the cape mountain zebra |
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Journal Article |
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Year |
1983 |
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Abbreviated Journal |
Koedoe |
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26 |
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159-168 |
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Notes |
from Professor Hans Klingels Equine Reference List |
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no |
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Call Number |
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Serial |
1127 |
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Author |
Crook, J.H. |
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Title |
On attributing consciousness to animals |
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Journal Article |
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Year |
1983 |
Publication |
Nature |
Abbreviated Journal |
Nature |
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Volume |
303 |
Issue |
5912 |
Pages |
11-14 |
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Keywords |
Animals; *Behavior, Animal; Cognition; *Consciousness; Evolution; Learning |
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0028-0836 |
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Notes |
PMID:6843653 |
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no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2795 |
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Author |
Berger, J. |
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Title |
Induced abortion and social factors in wild horses |
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Journal Article |
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Year |
1983 |
Publication |
Nature |
Abbreviated Journal |
Nature |
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Volume |
303 |
Issue |
5912 |
Pages |
59-61 |
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Keywords |
Abortion, Induced/*veterinary; Abortion, Veterinary/*etiology; Aggression/physiology; Animals; Evolution; Female; Horses/*physiology; Humans; Pregnancy; Sexual Behavior, Animal/*physiology |
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Abstract |
Much evidence now suggests that the postnatal killing of young in primates and carnivores, and induced abortions in some rodents, are evolved traits exerting strong selective pressures on adult male and female behaviour. Among ungulates it is perplexing that either no species have developed convergent tactics or that these behaviours are not reported, especially as ungulates have social systems similar to those of members of the above groups. Only in captive horses (Equus caballus) has infant killing been reported. It has been estimated that 40,000 wild horses live in remote areas of the Great Basin Desert of North America (US Department of Interior (Bureau of Land Management), unpublished report), where they occur in harems (females and young) defended by males. Here I present evidence that, rather than killing infants directly, invading males induce abortions in females unprotected by their resident stallions and these females are then inseminated by the new males. |
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0028-0836 |
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Notes |
PMID:6682487 |
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no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
4365 |
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Author |
Kaseda Y, |
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Title |
Seasonal variations in heart rate and body temperature of Misaki horses |
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Journal Article |
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Year |
1983 |
Publication |
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Abbreviated Journal |
Proc Vth Wid Conf Anim Prod |
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2 |
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Pages |
765-766 |
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Notes |
from Professor Hans Klingels Equine Reference List |
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no |
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Call Number |
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Serial |
1236 |
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Author |
Zentall, S.S.; Zentall, T.R. |
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Title |
Optimal stimulation: a model of disordered activity and performance in normal and deviant children |
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Journal Article |
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Year |
1983 |
Publication |
Psychological bulletin |
Abbreviated Journal |
Psychol Bull |
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Volume |
94 |
Issue |
3 |
Pages |
446-471 |
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*Arousal; Attention Deficit Disorder with Hyperactivity/*psychology; Autistic Disorder/*psychology; Behavior Therapy; Child; Humans |
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0033-2909 |
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PMID:6657825 |
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refbase @ user @ |
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264 |
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Author |
Wolfe, J.M. |
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Title |
Hidden visual processes |
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Journal Article |
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Year |
1983 |
Publication |
Scientific American |
Abbreviated Journal |
Sci Am |
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Volume |
248 |
Issue |
2 |
Pages |
94-103 |
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Color Perception/*physiology; Humans; Motion Perception/physiology; Ocular Physiology; Vision; Visual Perception/*physiology |
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Abstract |
Isoluminant stimulus is an image whose edges are defined only by a change in color, not by change in brightness. The stimulus here is imperfect: the blue parts and the green parts of the image are only as nearly equal in brightness as they can be on the printed page. Moreover, the change in brightness beyond the edge of the page is apparent, and so is the fact that the reader is holding the magazine at reading distance. When such cues are removed under laboratory conditions, subjects faced with an isoluminant stimulus prove unable to bring its edges into focus. This deficiency contributes to making a familiar face hard to recognize. The experiment indicates that the brain process underlying visual accommodation (the focusing of the eyes) cannot “see” color; it is a hidden process distinct from the processes that lead to perception. The image shows Groucho Marx as he appeared in the motion picture Horse Feathers. |
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0036-8733 |
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PMID:6836258 |
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Call Number |
Equine Behaviour @ team @ |
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4066 |
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