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Author |
Houpt, K.; Kusunose, R. |
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Title |
Genetics of behaviour. |
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Book Chapter |
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Year |
2000 |
Publication |
The Genetics of the Horse |
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281-306 |
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CABI Publishing |
Place of Publication |
New York |
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Bowling, A.T., Ruvinsky, A. |
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9780851994291 |
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no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
4821 |
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Author |
Houpt, K. A.; Kusonose, R. |
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Title |
Genetic of behaviour |
Type |
Book Chapter |
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Year |
2000 |
Publication |
Genetics of the Horse |
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281-306 |
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Cab Intl |
Place of Publication |
Wallingford Oxfordshire |
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Bowling,A. T. ; Ruvinsky, A. |
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978-0851994291 |
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no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
5021 |
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Author |
Pichardo, M. |
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Title |
Valsequillo biostratigraphy. III: Equid ecospecies in Paleoindian sites |
Type |
Journal Article |
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Year |
2000 |
Publication |
Anthropologischer Anzeiger; Bericht Uber die Biologisch-Anthropologische Literatur |
Abbreviated Journal |
Anthropol Anz |
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Volume |
58 |
Issue |
3 |
Pages |
275-298 |
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Keywords |
Animals; *Ecology; Horses/*classification; Mexico; *Paleodontology; Species Specificity |
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Abstract |
Greater precision in North American Pleistocene equid taxonomy makes it now possible to exploit the ubiquitous horse remains in Paleoindian sites as ecological index-fossils. The horses of Central Mexico and the Southern Plains can be sorted by tooth size alone, except for two rare large horses of the Southern Plains. The species endemic to these grasslands and south to Central Mexico are Equus pacificus (large), E. conversidens (small), E. francisci (smallest). The Southern Plains were also occupied by a specialized grazer E. excelsus (Burnet and Sandia caves) and E. occidentalis (Dry and Sandia caves). West of the Rocky Mountains E. occidentalis was dominant. East of the Mississippi River two woodland species are found: E. fraternus and E. littoralis. |
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English |
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0003-5548 |
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PMID:11082786 |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2648 |
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Author |
Clement, T.S.; Zentall, T.R. |
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Title |
Development of a single-code/default coding strategy in pigeons |
Type |
Journal Article |
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Year |
2000 |
Publication |
Psychological science : a journal of the American Psychological Society / APS |
Abbreviated Journal |
Psychol Sci |
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Volume |
11 |
Issue |
3 |
Pages |
261-264 |
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Keywords |
Animals; Attention; Columbidae; *Discrimination Learning; Female; Male; *Pattern Recognition, Visual; *Problem Solving; Retention (Psychology) |
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Abstract |
We tested the hypothesis that pigeons could use a cognitively efficient coding strategy by training them on a conditional discrimination (delayed symbolic matching) in which one alternative was correct following the presentation of one sample (one-to-one), whereas the other alternative was correct following the presentation of any one of four other samples (many-to-one). When retention intervals of different durations were inserted between the offset of the sample and the onset of the choice stimuli, divergent retention functions were found. With increasing retention interval, matching accuracy on trials involving any of the many-to-one samples was increasingly better than matching accuracy on trials involving the one-to-one sample. Furthermore, following this test, pigeons treated a novel sample as if it had been one of the many-to-one samples. The data suggest that rather than learning each of the five sample-comparison associations independently, the pigeons developed a cognitively efficient single-code/default coding strategy. |
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Department of Psychology, University of Kentucky, Lexington, KY 40506, USA |
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0956-7976 |
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Notes |
PMID:11273414 |
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no |
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Call Number |
refbase @ user @ |
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246 |
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Author |
Mech L.D. |
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Title |
Leadership in Wolf, Canis lupus, Packs. |
Type |
Journal Article |
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Year |
2000 |
Publication |
Canadian Field-Naturalist |
Abbreviated Journal |
Can Field Nat |
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Volume |
114 |
Issue |
2 |
Pages |
259-263 |
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Keywords |
Wolf, Canis lupus, leadership, behavior, foraging, movements, pup care, provisioning, sociality, reproduction, breeding, Northwest Territories. |
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Abstract |
I examine leadership in Wolf (Canis lupus) packs based on published observations and data gathered during summers from 1986 to 1998 studying a free-ranging pack of Wolves on Ellesmere Island that were habituated to my presence. The breeding male tended to initiate activities associated with foraging and travel, and the breeding female to initiate, and predominate in, pup care and protection. However, there was considerable overlap and interaction during these activities such that leadership could be considered a joint function. In packs with multiple breeders, quantitative information about leadership is needed. |
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Call Number |
Equine Behaviour @ team @ |
Serial |
4688 |
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Author |
Lyn, H.; Savage-Rumbaugh, E.S. |
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Title |
Observational word learning in two bonobos (Pan paniscus): ostensive and non-ostensive contexts |
Type |
Journal Article |
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Year |
2000 |
Publication |
Language & Communication |
Abbreviated Journal |
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Volume |
20 |
Issue |
3 |
Pages |
255-273 |
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Keywords |
Language acquisition; Bonobo; Fast mapping |
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Abstract |
Word learning has been extensively studied in humans. Children seem to be able to map new words onto objects with only one exposure to the referent. This ability has been called “fast mapping”(Carey, 1978 and Carey). Using a modified human paradigm, this paper explores two language-competent bonobos' (Pan paniscus) abilities to map new words to objects in realistic surroundings with few exposures to the referents. This paper also investigates the necessity of the apes maintaining visual contact (ostensive context) with the item to map the novel name onto the novel object. The bonobos tested in this experiment were able to map new words onto objects and could do so without visual contact with the items. |
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Equine Behaviour @ team @ |
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4675 |
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Author |
de Waal, Frans B. M. |
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Title |
Attitudinal reciprocity in food sharing among brown capuchin monkeys |
Type |
Journal Article |
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Year |
2000 |
Publication |
Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
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Volume |
60 |
Issue |
2 |
Pages |
253-261 |
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Abstract |
Capuchin monkeys (Cebus apella) share food even if separated by a mesh restraint. Pairs of capuchins were moved into a test chamber in which one of them received apple pieces for 20 min, and the other received carrot pieces for the next 20 min. Previous research had shown a correlation between the rate of food transfer in both directions across female-female dyads. The present study confirmed this result. Reciprocity across dyads can be explained, however, by symmetry in affiliative and tolerant tendencies between two individuals, provided these tendencies determine food sharing. The present study was designed to exclude this symmetry-based explanation by testing each pair (N=16) of adult females on six separate occasions. There existed a significant covariation across tests of sharing in both dyadic directions, a result unexplained by relationship symmetry. Moreover, control procedures (i.e. testing of a food possessor without a partner, or testing of two individuals with the same food or two different foods at the same time) indicated that behaviour during food trials is not fully explained by mutual attraction or aversion. The monkeys take the quality of their own and the partner's food into account, and possessors limit transfers of high-quality foods. Instead of a symmetry-based reciprocity explanation, a mediating role of memory is suggested, and a mirroring of social attitude between partners. Copyright 2000 The Association for the Study of Animal Behaviour. |
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Yerkes Regional Primate Research Center and Department of Psychology, Emory University, Atlanta |
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0003-3472 |
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PMID:10973728 |
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refbase @ user @ |
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186 |
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Author |
Miyashita, Y.; Nakajima, S.; Imada, H. |
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Title |
Differential outcome effect in the horse. |
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Journal Article |
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Year |
2000 |
Publication |
Journal of the Experimental Analysis of Behavior |
Abbreviated Journal |
J Exp Anal Behav |
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Volume |
74 |
Issue |
2 |
Pages |
245-253. |
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Abstract |
hree horses were trained with a discrimination task in which the color (blue or yellow) of a center panel signaled the correct (left or right) response (lever press). Reinforcing outcomes for the two correct color-position combinations (blue-left and yellow-right) were varied across phases. Discrimination performance was better when the combinations were differentially reinforced by two types of food (chopped carrot pieces and a solid food pellet) than when the combinations were randomly reinforced by these outcomes or when there was a common reinforcer for each of the correct combinations. However, the discrimination performance established by the differential outcome procedure was still 80% to 90% correct, and an analysis of two-trial sequences revealed that the stimulus color of the preceding trial interfered with discrimination performance on a given trial. Our demonstration of the differential outcome effect in the horse and its further analysis might contribute to more efficient control of equine behavior in the laboratory as well as in horse sports. |
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Equine Behaviour @ team @ |
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3579 |
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Author |
Cameron, E.Z.; Linklater, W.L.; Stafford, K.J.; Minot, E.O. |
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Title |
Aging and improving reproductive success in horses: declining residual reproductive value or just older and wiser? |
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Journal Article |
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Year |
2000 |
Publication |
Behavioral Ecology and Sociobiology |
Abbreviated Journal |
Behav. Ecol. Sociobiol. |
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47 |
Issue |
4 |
Pages |
243-249 |
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Maternal investment – Equidae – Equus caballus |
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In many mammalian species, female success in raising offspring improves as they age. The residual reproductive value hypothesis predicts that each individual offspring will be more valuable to the mother as she ages because there is less conflict between the current and potential future offspring. Therefore, as mothers age, their investment into individual offspring should increase. Empirical evidence for an influence of declining residual reproductive value on maternal investment is unconvincing. Older mothers may not invest more, but may be more successful due to greater experience, allowing them to target their investment more appropriately (targeted reproductive effort hypothesis). Most studies do not preclude either hypothesis. Mare age significantly influenced maternal investment in feral horses living on the North Island of New Zealand. Older mares, that were more successful at raising foals, were more protective for the first 20 days of life, but less diligent thereafter. Total maternal input by older mothers did not seem to be any greater, but was better targeted at the most critical period for foal survival and a similar pattern was observed in mares that had lost a foal in the previous year. In addition, older mothers were more likely to foal in consecutive years, supporting the hypothesis that they are investing less than younger mares in individual offspring. Therefore, older mothers seem to become more successful by targeting their investment better due to experience, not by investing more in their offspring. |
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2019 |
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De Vries, H.; Appleby, M.C. |
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Finding an appropriate order for a hierarchy: a comparison of the I&SI and the BBS methods |
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Journal Article |
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Year |
2000 |
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Animal Behaviour. |
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Anim. Behav. |
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59 |
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1 |
Pages |
239-245 |
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refbase @ user @ |
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