| Records |
| Author |
Albiach-Serrano, A.; Guillen-Salazar, F.; Call, J. |
| Title |
Mangabeys (Cercocebus torquatus lunulatus) solve the reverse contingency task without a modified procedure |
Type |
Journal Article |
| Year |
2007 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
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| Abstract |
Problem solving often relies on generating new responses while inhibiting others, particularly prepotent ones. A paradigm to study inhibitory abilities is the reverse contingency task (Boysen and Berntson in J Exp Psychol Anim Behav Process 21:82-86, 1995), in which two different quantities of food are offered to an individual who receives the array he did not choose. Therefore, mastery of the task demands selecting the smaller quantity to obtain the larger one. Several non-human primates have been tested in the reverse contingency task. To date, only great apes and rhesus monkeys (Macaca mulatta) have succeeded in the original task, with no need of procedural modifications as the large-or-none contingency, correction trials or symbolic stimuli substituting for actual food quantities. Here, four mangabeys were presented with two stimulus arrays of one and four raisins in the context of the reverse contingency task. Three of them learned to perform the task well above chance without a modified procedure. They also reached above-chance performance when presented with two stimulus arrays of zero and four raisins, despite the initial difficulty of choosing a null quantity. After a period of 7-10 months, in which the animals were not tested on any task, all three subjects continued to perform well, even when presented with novel quantity pairs. |
| Address |
Unidad de Etologia y Bienestar Animal, Universidad Cardenal Herrera, 46113, Moncada (Valencia), Spain, analse@alumni.uv.es |
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1435-9448 |
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PMID:17318622 |
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no |
| Call Number |
Equine Behaviour @ team @ |
Serial |
2418 |
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| Author |
Subiaul, F.; Romansky, K.; Cantlon, J.F.; Klein, T.; Terrace, H. |
| Title |
Cognitive imitation in 2-year-old children (Homo sapiens): a comparison with rhesus monkeys (Macaca mulatta) |
Type |
Journal Article |
| Year |
2007 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
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Here we compare the performance of 2-year-old human children with that of adult rhesus macaques on a cognitive imitation task. The task was to respond, in a particular order, to arbitrary sets of photographs that were presented simultaneously on a touch sensitive video monitor. Because the spatial position of list items was varied from trial to trial, subjects could not learn this task as a series of specific motor responses. On some lists, subjects with no knowledge of the ordinal position of the items were given the opportunity to learn the order of those items by observing an expert model. Children, like monkeys, learned new lists more rapidly in a social condition where they had the opportunity to observe an experienced model perform the list in question, than under a baseline condition in which they had to learn new lists entirely by trial and error. No differences were observed between the accuracy of each species' responses to individual items or in the frequencies with which they made different types of errors. These results provide clear evidence that monkeys and humans share the ability to imitate novel cognitive rules (cognitive imitation). |
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Department of Speech and Hearing Science, The George Washington University, 1922 F Street, NW # 406E, Washington, DC, 20001, USA, subiaul@aol.com |
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1435-9448 |
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PMID:17287996 |
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no |
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Equine Behaviour @ team @ |
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2420 |
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| Author |
Moskat, C.; Hauber, M.E. |
| Title |
Conflict between egg recognition and egg rejection decisions in common cuckoo (Cuculus canorus) hosts |
Type |
Journal Article |
| Year |
2007 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
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Common cuckoos (Cuculus canorus) are obligate brood parasites, laying eggs into nests of small songbirds. The cuckoo hatchling evicts all eggs and young from a nest, eliminating hosts' breeding success. Despite the consistently high costs of parasitism by common cuckoos, great reed warbler (Acrocephalus arundinaceus) hosts sometime accept and other times reject parasitic eggs. To explore the cognitive basis of this seemingly maladaptive variation in host responses, we documented differences in egg rejection rates within 1-day periods just before and during the egg-laying cycle across host nests. Hosts rejected cuckoo eggs at 28% of nests during the pre-egg-laying stage, but when cuckoos exchanged the first host egg with the parasite egg, rejections increased to 75%. Even later, when several host eggs remained in a nest after parasitism, rejection rate fell to 37.5%. Experimental parasitism with conspecific eggs on the first and second day of host laying showed a similar directional change in relative rejection rates, dropping from 35 to 0%. Mistakes in egg discrimination (ejection error and ejection cost) were observed mostly in the latter part of the laying cycle, mainly when nests contained 5-6 eggs. These correlational and experimental patterns of egg rejection support a cognitive process of egg discrimination through several shifts in hosts' optimal acceptance thresholds of foreign eggs. The results are also consistent with the evolution of foreign egg rejection in the context of nest-sanitation (i.e. the removal of foreign objects). Our results suggest that common cuckoo hosts may recognize more eggs than they reject. This implies that the experience of the host with one or more of its own eggs in the clutch is a key factor in rejecting parasite eggs by allowing inspection and learning about their own clutch. |
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Animal Ecology Research Group of the Hungarian Academy of Sciences, c/o Hungarian Natural History Museum, Budapest, Ludovika ter 2., 1083, Hungary, moskat@nhmus.hu |
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1435-9448 |
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PMID:17279422 |
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no |
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Equine Behaviour @ team @ |
Serial |
2421 |
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| Author |
Pickering, C.M.; Hill, W. |
| Title |
Impacts of recreation and tourism on plant biodiversity and vegetation in protected areas in Australia |
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Journal Article |
| Year |
2007 |
Publication |
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J Environ Manage |
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This paper reviews recent research into the impact of recreation and tourism in protected areas on plant biodiversity and vegetation communities in Australia. Despite the international significance of the Australian flora and increasing visitation to protected areas there has been limited research on recreational and tourism impacts in Australia. As overseas, there are obvious direct impacts of recreation and tourism such as clearing of vegetation for infrastructure or damage from trampling, horse riding, mountain biking and off road vehicles. As well, there are less obvious but potentially more severe indirect impacts. This includes self-propagating impacts associated with the spread of some weeds from trails and roads. It also includes the severe impact on native vegetation, including many rare and threatened plants, from spread of the root rot fungus Phytopthora cinnamomi. This review highlights the need for more recreational ecology research in Australia. |
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International Centre for Ecotourism Research, Griffith University, PMB 50 Gold Coast Mail Centre, Gold Coast, Qld. 9726, Australia |
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0301-4797 |
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PMID:17234325 |
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no |
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Equine Behaviour @ team @ |
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2620 |
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| Author |
Cheng, K. |
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K.J. Jeffery (ed) The neurobiology of spatial behaviourOxford University Press, Oxford, 2003 |
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Journal Article |
| Year |
2004 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
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Wissenschaftskolleg zu Berlin, Wallotstr. 19, 14193, Berlin |
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1435-9448 |
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PMID:15015034 |
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no |
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Equine Behaviour @ team @ |
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2542 |
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| Author |
Thorndike EL |
| Title |
Animal intelligence: an experimental study of the associative process in animals |
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Journal Article |
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1898 |
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Psychol. Rev. Monogr. |
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Vl - |
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no |
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Equine Behaviour @ team @ |
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3043 |
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Lombardi, C. |
| Title |
Matching and oddity relational learning by pigeons ( Columba livia ): transfer from color to shape |
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Journal Article |
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Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
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Abstract Relational learning, as opposed to perceptual learning, is based on the abstract properties of the stimuli. Although at present there is no doubt that pigeons are capable of relational behavior, this study aims to further disclose the conditions under which it occurs. Pigeons were trained in an outdoor cage on a matching-to-sample or an oddity-from-sample task, with colored cardboard stimuli presented horizontally. The apparatus involved three sliding lids on which the stimuli were drawn and which, when displaced, revealed the reinforcement. The lids were either adjacent to each other or somewhat separated. Training sessions involved two colors, and test sessions six different colors (same dimension test), or six different shapes (different dimension test). One group of birds trained under the “adjacent” condition failed when tested with new stimuli, but succeeded in both dimension tests after training under the “separate” condition. Two other groups of birds succeeded in all tests after training under the latter condition. These results show that depending on procedural details, pigeons are or are not able to transfer from one visual dimension to another, thus extending previous related findings. |
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Equine Behaviour @ team @ |
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3270 |
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| Author |
Sommer, H.; Barz, A.; Lindner, A. |
| Title |
Testing horses for character and temperament |
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1996 |
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Tierarztliche Umschau |
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Tierärztl. Umschau |
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Equine Behaviour @ team @ |
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3567 |
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| Author |
Dixon , J. |
| Title |
The horse: a dumb animal |
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The Thoroughbred Record |
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The Thoroughbred Rec, |
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Equine Behaviour @ team @ |
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3584 |
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Halford; G.S.; Halford, J.M . |
| Title |
Secondary reinforcement: signal or substitute reward? A preliminary investigation |
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1969 |
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Aus. J. Psychol |
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Equine Behaviour @ team @ |
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3588 |
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