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GRAHAM A et al, |
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An aerial survey of horses and other karge animals in Alice Springs and Gulf regions |
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1986 |
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Cons Comm North Terr Alice Springs Techn Rep |
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from Professor Hans Klingels Equine Reference List |
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1123 |
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Author |
Beaver, B.V. |
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Title |
Aggressive behavior problems |
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Journal Article |
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Year |
1986 |
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The Veterinary clinics of North America. Equine practice |
Abbreviated Journal |
Vet Clin North Am Equine Pract |
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2 |
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3 |
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635-644 |
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Affect; Aggression/*psychology; Animals; *Behavior, Animal; Dominance-Subordination; Fear; *Horses; Play and Playthings; Sexual Behavior, Animal; Social Environment |
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Accurate diagnosis of the cause of aggression in horses is essential to determining the appropriate course of action. The affective forms of aggression include fear-induced, pain-induced, intermale, dominance, protective, maternal, learned, and redirected aggressions. Non-affective aggression includes play and sex-related forms. Irritable aggression and hypertestosteronism in mares are medical problems, whereas genetic factors, brain dysfunction, and self-mutilation are also concerns. |
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0749-0739 |
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PMID:3492250 |
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refbase @ user @ |
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674 |
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Cynx, J.; Hulse, S.H.; Polyzois, S. |
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A psychophysical measure of pitch discrimination loss resulting from a frequency range constraint in European starlings (Sturnus vulgaris) |
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Journal Article |
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1986 |
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Journal of Experimental Psychology. Animal Behavior Processes |
Abbreviated Journal |
J Exp Psychol Anim Behav Process |
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12 |
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4 |
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394-402 |
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Animals; *Birds; Cognition; Female; *Generalization, Stimulus; Male; *Pitch Discrimination; Psychoacoustics; Transfer (Psychology) |
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Earlier research (Hulse & Cynx, 1985) revealed that a number of species of songbirds acquired a pitch discrimination between rising and falling sequences in an arbitrarily defined training range of frequencies, but then failed to generalize the discrimination to new frequency ranges--a frequency range constraint. The two experiments here provide a psychophysical estimate of how pitch discrimination deteriorated in one species as sequences were stepped out from the training range. The gradient showing loss of discrimination was much sharper than would have been anticipated by stimulus generalization or the training procedures, and appeared unaffected by the removal of rising and falling frequency information. The frequency range constraint and its psychophysical properties have implications both for the analysis of birdsong and the study of animal cognition. |
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0097-7403 |
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PMID:3772303 |
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Equine Behaviour @ team @ |
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2786 |
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Berry, M.P.S |
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A comparison of different wildlife production enterprises in the northern Cape Province, South Africa |
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1986 |
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S. Afr. J. Wildl. Res. |
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16 |
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4 |
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124-128 |
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Equine Behaviour @ team @ |
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2238 |
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