Records |
Author |
Burke, D.; Cieplucha, C.; Cass, J.; Russell, F.; Fry, G. |
Title |
Win-shift and win-stay learning in the short-beaked echidna (Tachyglossus aculeatus) |
Type |
Journal Article |
Year |
2002 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
Volume |
5 |
Issue |
2 |
Pages |
79-84 |
Keywords |
Animals; Echidna/*psychology; Ecology; Female; *Learning; *Memory; *Predatory Behavior; Reinforcement (Psychology) |
Abstract |
Numerous previous investigators have explained species differences in spatial memory performance in terms of differences in foraging ecology. In three experiments we attempted to extend these findings by examining the extent to which the spatial memory performance of echidnas (or “spiny anteaters”) can be understood in terms of the spatio-temporal distribution of their prey (ants and termites). This is a species and a foraging situation that have not been examined in this way before. Echidnas were better able to learn to avoid a previously rewarding location (to “win-shift”) than to learn to return to a previously rewarding location (to “win-stay”), at short retention intervals, but were unable to learn either of these strategies at retention intervals of 90 min. The short retention interval results support the ecological hypothesis, but the long retention interval results do not. |
Address |
Department of Psychology, University of Wollongong, Wollongong, NSW 2522, Australia. darren_burke@uow.edu.au |
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1435-9448 |
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PMID:12150039 |
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no |
Call Number |
Equine Behaviour @ team @ |
Serial |
2605 |
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Author |
Chase, I.D.; Tovey, C.; Spangler-Martin, D.; Manfredonia, M. |
Title |
Individual differences versus social dynamics in the formation of animal dominance hierarchies |
Type |
Journal Article |
Year |
2002 |
Publication |
Proceedings of the National Academy of Sciences of the United States of America |
Abbreviated Journal |
Proc. Natl. Acad. Sci. U.S.A. |
Volume |
99 |
Issue |
8 |
Pages |
5744-5749 |
Keywords |
Animals; *Behavior, Animal; Fishes; Humans; *Social Behavior; *Social Dominance |
Abstract |
Linear hierarchies, the classical pecking-order structures, are formed readily in both nature and the laboratory in a great range of species including humans. However, the probability of getting linear structures by chance alone is quite low. In this paper we investigate the two hypotheses that are proposed most often to explain linear hierarchies: they are predetermined by differences in the attributes of animals, or they are produced by the dynamics of social interaction, i.e., they are self-organizing. We evaluate these hypotheses using cichlid fish as model animals, and although differences in attributes play a significant part, we find that social interaction is necessary for high proportions of groups with linear hierarchies. Our results suggest that dominance hierarchy formation is a much richer and more complex phenomenon than previously thought, and we explore the implications of these results for evolutionary biology, the social sciences, and the use of animal models in understanding human social organization. |
Address |
Department of Sociology, State University of New York, Stony Brook, NY 11794-4356, USA. Ichase@notes.cc.sunysb.edu |
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English |
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ISSN |
0027-8424 |
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Notes |
PMID:11960030 |
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no |
Call Number |
refbase @ user @ |
Serial |
442 |
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Author |
Endy, T.P.; Nisalak, A. |
Title |
Japanese encephalitis virus: ecology and epidemiology |
Type |
Journal Article |
Year |
2002 |
Publication |
Current Topics in Microbiology and Immunology |
Abbreviated Journal |
Curr Top Microbiol Immunol |
Volume |
267 |
Issue |
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Pages |
11-48 |
Keywords |
Animals; Birds/virology; Climate; Culicidae/virology; Disease Outbreaks/history; Ecosystem; Encephalitis Virus, Japanese/*pathogenicity; Encephalitis, Japanese/*epidemiology/*etiology/history/transmission; History, 20th Century; Horses/virology; Humans; Insect Vectors; Japan/epidemiology; Risk Factors; Swine/virology; Thailand/epidemiology; Viral Vaccines/pharmacology |
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Address |
Department of Virology, United States Army Medical Component, Armed Forces Research Institute of Medical Sciences (USAMC-AFRIMS), 315/6 Rajvithi Road, Bangkok 10400, Thailand |
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English |
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ISSN |
0070-217X |
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Notes |
PMID:12082986 |
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no |
Call Number |
Equine Behaviour @ team @ |
Serial |
2643 |
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Author |
Weir, A.A.S.; Chappell, J.; Kacelnik, A. |
Title |
Shaping of hooks in New Caledonian crows |
Type |
Journal Article |
Year |
2002 |
Publication |
Science (New York, N.Y.) |
Abbreviated Journal |
Science |
Volume |
297 |
Issue |
5583 |
Pages |
981 |
Keywords |
Animals; *Behavior, Animal; *Cognition; Female; Male; Songbirds/*physiology |
Abstract |
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Address |
Department of Zoology, South Parks Road, Oxford OX1 3PS, UK |
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English |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
1095-9203 |
ISBN |
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Notes |
PMID:12169726 |
Approved |
no |
Call Number |
Equine Behaviour @ team @ |
Serial |
2842 |
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Author |
Reader, S.M.; Laland, K.N. |
Title |
Social intelligence, innovation, and enhanced brain size in primates |
Type |
Journal Article |
Year |
2002 |
Publication |
Proceedings of the National Academy of Sciences of the United States of America |
Abbreviated Journal |
Proc. Natl. Acad. Sci. U.S.A. |
Volume |
99 |
Issue |
7 |
Pages |
4436-4441 |
Keywords |
Animals; Brain/*anatomy & histology; Evolution; *Intelligence; Learning; Primates/*anatomy & histology/*psychology; Social Behavior |
Abstract |
Despite considerable current interest in the evolution of intelligence, the intuitively appealing notion that brain volume and “intelligence” are linked remains untested. Here, we use ecologically relevant measures of cognitive ability, the reported incidence of behavioral innovation, social learning, and tool use, to show that brain size and cognitive capacity are indeed correlated. A comparative analysis of 533 instances of innovation, 445 observations of social learning, and 607 episodes of tool use established that social learning, innovation, and tool use frequencies are positively correlated with species' relative and absolute “executive” brain volumes, after controlling for phylogeny and research effort. Moreover, innovation and social learning frequencies covary across species, in conflict with the view that there is an evolutionary tradeoff between reliance on individual experience and social cues. These findings provide an empirical link between behavioral innovation, social learning capacities, and brain size in mammals. The ability to learn from others, invent new behaviors, and use tools may have played pivotal roles in primate brain evolution. |
Address |
Department of Zoology, University of Cambridge, High Street, Madingley, Cambridge CB3 8AA, United Kingdom |
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English |
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Edition |
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ISSN |
0027-8424 |
ISBN |
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Notes |
PMID:11891325 |
Approved |
no |
Call Number |
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Serial |
2149 |
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Author |
Jackson, R.R.; Pollard, S.D.; Cerveira, A.M. |
Title |
Opportunistic use of cognitive smokescreens by araneophagic jumping spiders |
Type |
Journal Article |
Year |
2002 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
Volume |
5 |
Issue |
3 |
Pages |
147-157 |
Keywords |
Animals; *Cognition; Movement; Optics; *Predatory Behavior; *Spiders; Touch; Visual Perception |
Abstract |
Little is known about how a prey species' cognitive limitations might shape a predator's prey-capture strategy. A specific hypothesis is investigated: predators take advantage of times when the prey's attention is focussed on its own prey. Portia fimbriata, an araneophagic jumping spider (Salticidae) from Queensland, is shown in a series of 11 experiments to exploit opportunistically a situation in which a web-building spider on which it preys, Zosis genicularis (Uloboridae), is preoccupied with wrapping up its own prey. Experimental evidence supports three conclusions: (1). while relying on optical cues alone, P. fimbriata perceives when Z. genicularis is wrapping up prey; (2). when busy wrapping up prey, the responsiveness of Z. genicularis to cues from potential predators is diminished; and (3). P. fimbriata moves primarily during intervals when Z. genicularis is busy wrapping up prey. P. fimbriata's strategy is effective partly because the wrapping behaviour of Z. genicularis masks the web signals generated by the advancing P. fimbriata's footsteps and also because, while wrapping, Z. genicularis' attention is diverted away from predator-revealing cues. |
Address |
Department of Zoology, University of Canterbury, Christchurch, New Zealand |
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English |
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1435-9448 |
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Notes |
PMID:12357287 |
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no |
Call Number |
Equine Behaviour @ team @ |
Serial |
2598 |
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Author |
Jackson, R.R.; Pollard, S.D.; Li, D.; Fijn, N. |
Title |
Interpopulation variation in the risk-related decisions of Portia labiata, an araneophagic jumping spider (Araneae, Salticidae), during predatory sequences with spitting spiders |
Type |
Journal Article |
Year |
2002 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
Volume |
5 |
Issue |
4 |
Pages |
215-223 |
Keywords |
Animals; Female; Male; Mental Processes; *Predatory Behavior; Risk Factors; *Spiders |
Abstract |
The extent to which decision-making processes are constrained in animals with small brains is poorly understood. Arthropods have brains much smaller and simpler than those of birds and mammals. This raises questions concerning limitations on how intricate the decision-making processes might be in arthropods. At Los Banos in the Philippines, Scytodes pallidus is a spitting spider that specialises in preying on jumping spiders, and Portia labiata is a jumping spider that preys on S. pallidus. Scytodid spit comes from the mouth, and egg-carrying females are less dangerous than eggless scytodids because the female uses her chelicerae to hold her eggs. Held eggs block her mouth, and she has to release them before she can spit. The Los Banos P. labiata sometimes adjusts its tactics depending on whether the scytodid encountered is carrying eggs or not. When pursuing eggless scytodids, the Los Banos P. labiata usually takes detour routes that enable it to close in from behind (away from the scytodid's line of fire). However, when pursuing egg-carrying scytodids, the Los Banos P. labiata sometimes takes faster direct routes to reach these safer prey. The Los Banos P. labiata apparently makes risk-related adjustments specific to whether scytodids are carrying eggs, but P. labiata from Sagada in the Philippines (allopatric to Scytodes) fails to make comparable risk-related adjustments. |
Address |
Department of Zoology, University of Canterbury, Private Bag 4800, Christchurch, New Zealand |
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English |
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1435-9448 |
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Notes |
PMID:12461599 |
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no |
Call Number |
Equine Behaviour @ team @ |
Serial |
2591 |
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Author |
Chappell, J.; Kacelnik, A. |
Title |
Tool selectivity in a non-primate, the New Caledonian crow (Corvus moneduloides) |
Type |
Journal Article |
Year |
2002 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
Volume |
5 |
Issue |
2 |
Pages |
71-78 |
Keywords |
Adaptation, Psychological; Animals; *Cognition; Female; *Learning; Male; Perception; *Songbirds |
Abstract |
We present an experiment showing that New Caledonian crows are able to choose tools of the appropriate size for a novel task, without trial-and-error learning. This species is almost unique amongst all animal species (together with a few primates) in the degree of use and manufacture of polymorphic tools in the wild. However, until now, the flexibility of their tool use has not been tested. Flexibility, including the ability to select an appropriate tool for a task, is considered to be a hallmark of complex cognitive adaptations for tool use. In experiment 1, we tested the ability of two captive birds (one male, one female), to select a stick (from a range of lengths provided) matching the distance to food placed in a horizontal transparent pipe. Both birds chose tools matching the distance to their target significantly more often than would be expected by chance. In experiment 2, we used a similar task, but with the tools placed out of sight of the food pipe, such that the birds had to remember the distance of the food before selecting a tool. The task was completed only by the male, who chose a tool of sufficient length significantly more often than chance but did not show a preference for a matching length. |
Address |
Department of Zoology, University of Oxford, South Parks Road, Oxford OXI 3PS, UK. jackie.chappell@zoo.ox.ac.uk |
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English |
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ISSN |
1435-9448 |
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Notes |
PMID:12150038 |
Approved |
no |
Call Number |
Equine Behaviour @ team @ |
Serial |
2606 |
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Author |
Drapier, M.; Chauvin, C.; Thierry, B. |
Title |
Tonkean macaques ( Macaca tonkeana) find food sources from cues conveyed by group-mates |
Type |
Journal Article |
Year |
2002 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
Volume |
5 |
Issue |
3 |
Pages |
159-165 |
Keywords |
*Animal Communication; Animals; *Cognition; *Feeding Behavior; Food; *Macaca; Male; Smell; *Social Behavior; Visual Perception |
Abstract |
It is possible that non-specialised cues transmitted by conspecifics guide animals' food search provided they have the cognitive abilities needed to read these cues. Macaques often check the mouth of their group-mates by olfactory and/or visual inspection. We investigated whether Tonkean macaques ( Macaca tonkeana) can find the location of distant food on the basis of cues conveyed by group-mates. The subjects of the study were two 6-year-old males, who belonged to a social group of Tonkean macaques raised in semi-free-ranging conditions. In a first experiment, we tested whether the subject can choose between two sites after having sniffed a partner who has just eaten food corresponding to one of the sites. We found that both subjects were able to choose the matching site significantly above the chance level. This demonstrated that Tonkean macaques are capable of delayed olfactory matching. They could associate a food location with an odour conveyed by a partner. In a second experiment, the same subjects were allowed to see their partner through a Plexiglas window. Both subjects were still able to choose the matching site, demonstrating they could rely on visual cues alone. Passive recruitment of partners appears possible in macaques. They can improve their foraging performances by finding the location of environmental resources from olfactory or visual cues conveyed by group-mates. |
Address |
Equipe d'Ethologie et Ecologie Comportementale des Primates, Centre d'Ecologie et Physiologie Energetiques, CNRS UPR 9010, 7 rue de l'Universite, 67000 Strasbourg, France |
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English |
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1435-9448 |
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PMID:12357288 |
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no |
Call Number |
Equine Behaviour @ team @ |
Serial |
2597 |
Permanent link to this record |
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Author |
Pollmann, U. |
Title |
[Keeping of horses in circus and show businesses] |
Type |
Journal Article |
Year |
2002 |
Publication |
DTW. Deutsche Tierarztliche Wochenschrift |
Abbreviated Journal |
Dtsch Tierarztl Wochenschr |
Volume |
109 |
Issue |
3 |
Pages |
126-129 |
Keywords |
Animal Husbandry/*methods; *Animal Welfare; Animals; Behavior, Animal; *Horses; *Housing, Animal; Humans; Reward |
Abstract |
The conditions under which horses are kept and the performance of acts in the circus ring may give rise to animal protection-relevant aspects for circus and show horses. A number of intolerable conditions under which horses are kept and procedures adopted for the work with circus and show horses are described. In addition, attention is drawn to monitoring methods capable of exposing the deplorable shortcomings of these businesses. |
Address |
Fachbereich Ethologie und Tierschutz des Chemischen und Veterinaruntersuchungsamtes Freiburg. Ursula.Pollmann@cvuafr.bwl.de |
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Language |
German |
Summary Language |
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Original Title |
Pferdehaltung in Zirkus- und Schaustellerbetrieben |
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Edition |
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ISSN |
0341-6593 |
ISBN |
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Notes |
PMID:11963363 |
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no |
Call Number |
refbase @ user @ |
Serial |
1914 |
Permanent link to this record |