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Author |
Lewis, K.P.; Jaffe, S.; Brannon, E.M. |
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Title |
Analog number representations in mongoose lemurs (Eulemur mongoz): evidence from a search task |
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Journal Article |
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Year |
2005 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
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Volume  |
8 |
Issue |
4 |
Pages |
247-252 |
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Keywords |
Analysis of Variance; Animals; *Behavior, Animal; *Feeding Behavior; Female; Lemuridae/*psychology; Male; Mathematics; Odors; Smell/physiology; Time Factors |
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Abstract |
A wealth of data demonstrating that monkeys and apes represent number have been interpreted as suggesting that sensitivity to number emerged early in primate evolution, if not before. Here we examine the numerical capacities of the mongoose lemur (Eulemur mongoz), a member of the prosimian suborder of primates that split from the common ancestor of monkeys, apes and humans approximately 47-54 million years ago. Subjects observed as an experimenter sequentially placed grapes into an opaque bucket. On half of the trials the experimenter placed a subset of the grapes into a false bottom such that they were inaccessible to the lemur. The critical question was whether lemurs would spend more time searching the bucket when food should have remained in the bucket, compared to when they had retrieved all of the food. We found that the amount of time lemurs spent searching was indicative of whether grapes should have remained in the bucket, and furthermore that lemur search time reliably differentiated numerosities that differed by a 1:2 ratio, but not those that differed by a 2:3 or 3:4 ratio. Finally, two control conditions determined that lemurs represented the number of food items, and neither the odor of the grapes, nor the amount of grape (e.g., area) in the bucket. These results suggest that mongoose lemurs have numerical representations that are modulated by Weber's Law. |
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Department of Anthropology, Washington University, St. Louis, MO 63130-4899, USA |
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1435-9448 |
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PMID:15660208 |
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Equine Behaviour @ team @ |
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2497 |
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Author |
Ducoing, A.M.; Thierry, B. |
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Title |
Tool-use learning in Tonkean macaques (Macaca tonkeana) |
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Journal Article |
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Year |
2005 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
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Volume |
8 |
Issue |
2 |
Pages |
103-113 |
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Keywords |
Animals; *Association Learning; *Behavior, Animal; Cognition; Imitative Behavior; *Intelligence; Macaca/*psychology; Male; *Motor Skills |
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Abstract |
The transmission of tool use is a rare event in monkeys. Such an event arose in a group of semi-free-ranging Tonkean macaques (Macaca tonkeana) in which leaning a pole against the park's fence (branch leaning) appeared and spread to several males. This prompted us to test individual and social learning of this behavior in seven young males. In the first experiment, three males learned individually to obtain a food reward using a wooden pole as a climbing tool. They began using the pole to retrieve the reward only when they could alternatively experience acting on the object and reaching the target. In a second experiment, we first tested whether four other subjects could learn branch leaning after having observed a group-mate performing the task. Despite repeated opportunities to observe the demonstrator, they did not learn to use the pole as a tool. Hence we exposed the latter subjects to individual learning trials and they succeeded in the task. Tool use was not transmitted in the experimental situation, which contrasts with observations in the park. We can conclude that the subjects were not able to recognize the target as such. It is possible that they recognized it and learned the task individually when we alternated the opportunity to act upon the object and to reach the reward. This suggests that these macaques could then have associated the action they exercised upon the pole and the use of the pole as a means to reach the reward. |
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Centre d'Ecologie et Physiologie Energetiques, Centre National de la Recherche Scientifique, 7 rue de l'Universite, 67000, Strasbourg, France |
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1435-9448 |
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PMID:15449102 |
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Equine Behaviour @ team @ |
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2508 |
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Author |
Helton, W.S. |
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Title |
Animal expertise, conscious or not |
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Journal Article |
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Year |
2005 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
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Volume |
8 |
Issue |
2 |
Pages |
67-74 |
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Keywords |
Animals; *Behavior, Animal; *Cognition; *Consciousness; *Learning; Motor Skills; *Practice (Psychology) |
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Abstract |
Rossano (Cognition 89:207, 2003) proposes expertise as an indicator of consciousness in humans and other animals. Since there is strong evidence that the development of expertise requires deliberate practice (Ericsson in The road to excellence: the acquisition of expert performance in the arts and sciences, sports and games 1996), and deliberate practice appears to be outside of the bounds of unconscious processing, then any signs of expertise development in an animal are indicators of consciousness. Rossano's argument may lead to an unsolvable debate about animal consciousness while causing researchers to overlook the underlying reality of animal expertise. This article provides evidence indicative of animals meeting each of the three definitions of expertise established in the scientific literature: expertise as a social construction, expertise as exceptional performance, and expertise as knowledge. In addition, cases of deliberate practice by non-human animals are offered. Acknowledging some animals as experts, regardless of consciousness, is warranted by the research findings and would prove useful in solving many issues remaining in the human expertise literature. |
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Department of Psychology, Wilmington College, Wilmington, OH 45177, USA, deak_helton@yahoo.com |
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1435-9448 |
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PMID:15365876 |
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Call Number |
Equine Behaviour @ team @ |
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2511 |
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Author |
Wang, L.Y. |
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Title |
Host preference of mosquito vectors of Japanese encephalitis |
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Journal Article |
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Year |
1975 |
Publication |
Zhonghua Minguo wei Sheng wu xue za zhi = Chinese Journal of Microbiology |
Abbreviated Journal |
Zhonghua Min Guo Wei Sheng Wu Xue Za Zhi |
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Volume |
8 |
Issue |
4 |
Pages |
274-279 |
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Keywords |
Animals; *Behavior, Animal; Birds/blood; *Culex; Ecology; Encephalitis, Japanese/*transmission; *Feeding Behavior; Female; Humans; *Insect Vectors; Mammals/blood; Species Specificity; Taiwan |
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The host preference of 4 Culex mosquito species collected in Miaoli and Pingtung counties, Taiwan was studied by capillary precipitin method. Antisera to alum-precipitated sera of man, bovine, swine, rabbit, horse, dog, cat, mouse, chicken, duck, and pigeon were produced in rabbits and reacted with 758 mosquito blood meals among which reactions to one or more antisera. Culex annulus and Culex tritaeniorhynchus summorosus showed a great avidity for pig, and Culex fuscocephala for bovine. Culex pipiens fatigans was ornithophilic. None of 110 C. t. summorosus and 2.4% of 223 C. annulus had fed on man. Among 66 samples of C.p. fatigans tested 10.3% had fed on man, while none of 359 C. fuscocephala did. It seems that the latter does not act as a primary vector of Japanese encephalitis. |
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0009-4587 |
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PMID:181218 |
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Call Number |
Equine Behaviour @ team @ |
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2702 |
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Author |
Tempelis, C.H.; Nelson, R.L. |
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Title |
Blood-feeding patterns of midges of the Culicoides variipennis complex in Kern County, California |
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Journal Article |
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Year |
1971 |
Publication |
Journal of Medical Entomology |
Abbreviated Journal |
J Med Entomol |
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8 |
Issue |
5 |
Pages |
532-534 |
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Keywords |
Animals; Behavior, Animal; Cattle; Ceratopogonidae/*immunology; Chickens; Dogs; Ecology; Feeding Behavior; Female; Horses; Humans; Immune Sera; Mice; Precipitin Tests; Rabbits; Rats; Sciuridae; Sheep |
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0022-2585 |
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PMID:5160258 |
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Equine Behaviour @ team @ |
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2723 |
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Author |
Clement, T.S.; Feltus, J.R.; Kaiser, D.H.; Zentall, T.R. |
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Title |
“Work ethic” in pigeons: reward value is directly related to the effort or time required to obtain the reward |
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Journal Article |
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Year |
2000 |
Publication |
Psychonomic bulletin & review |
Abbreviated Journal |
Psychon Bull Rev |
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Volume |
7 |
Issue |
1 |
Pages |
100-106 |
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Keywords |
Animals; Behavior, Animal/*physiology; Cognition/physiology; Columbidae; Discrimination Learning/physiology; Female; Male; Reinforcement (Psychology); *Reward; Time Factors |
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Stimuli associated with less effort or with shorter delays to reinforcement are generally preferred over those associated with greater effort or longer delays to reinforcement. However, the opposite appears to be true of stimuli that follow greater effort or longer delays. In training, a simple simultaneous discrimination followed a single peck to an initial stimulus (S+FR1 S-FR1) and a different simple simultaneous discrimination followed 20 pecks to the initial stimulus (S+FR20 S-FR20). On test trials, pigeons preferred S+FR20 over S+FR1 and S-FR20 over S-FR1. These data support the view that the state of the animal immediately prior to presentation of the discrimination affects the value of the reinforcement that follows it. This contrast effect is analogous to effects that when they occur in humans have been attributed to more complex cognitive and social factors. |
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University of Kentucky, Lexington, USA |
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1069-9384 |
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PMID:10780022 |
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refbase @ user @ |
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248 |
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Author |
Kawamura, S. |
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Title |
Aggression as studied in troops of Japanese monkeys |
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Journal Article |
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Year |
1967 |
Publication |
UCLA Forum in Medical Sciences |
Abbreviated Journal |
UCLA Forum Med Sci |
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Volume |
7 |
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195-223 |
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Keywords |
*Aggression; Animals; Behavior, Animal; Defense Mechanisms; Female; *Haplorhini; Homosexuality; Humans; Japan; Leadership; Male; Play and Playthings; Sexual Behavior, Animal; Social Behavior; Socialization |
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0082-7134 |
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PMID:4972333 |
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2056 |
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Tomasello, M.; Call, J. |
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The role of humans in the cognitive development of apes revisited |
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Journal Article |
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2004 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
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Volume |
7 |
Issue |
4 |
Pages |
213-215 |
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Keywords |
Animals; *Behavior, Animal; *Cognition; Culture; Hominidae/*psychology; Humans; *Imitative Behavior; Imprinting (Psychology); *Intention; Social Behavior; *Social Environment; Species Specificity |
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Max Planck Institute for Evolutionary Anthropology, Deutscher Platz 6, 04103 Leipzig, Germany. tomas@eva.mpg.de |
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1435-9448 |
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PMID:15278733 |
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Equine Behaviour @ team @ |
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2517 |
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Author |
Yamazaki, Y.; Shinohara, N.; Watanabe, S. |
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Title |
Visual discrimination of normal and drug induced behavior in quails (Coturnix coturnix japonica) |
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Journal Article |
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Year |
2004 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
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Volume |
7 |
Issue |
2 |
Pages |
128-132 |
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Animals; Behavior, Animal/*drug effects; Classification; Coturnix/*physiology; *Discrimination Learning; *Generalization (Psychology); Ketamine/pharmacology; Male; Methamphetamine/pharmacology; *Pattern Recognition, Visual; Video Recording; Visual Perception |
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The ability to discriminate the physical states of others could be an adaptive behavior, especially for social animals. For example, the ability to discriminate illness behavior would be helpful for avoiding spoiled foods. We report on an experiment with Japanese quails testing whether these birds can discriminate the physical states of conspecifics. The quails were trained to discriminate between moving video images of quails injected with psychoactive drugs and those in a normal (not injected) condition. Methamphetamine (stimulant) or ketamine (anesthetic) were used to produce drug-induced behaviors in conspecifics. The former induced hyperactive behavior and the latter hypoactive behavior. The subject quails could learn the discrimination and showed generalization to novel images of the drug-induced behaviors. They did not, however, show discriminative behavior according to the type and dosage of the drugs. Thus, they categorized the behavior not on the basis of degree of activity, but on the basis of abnormality. |
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Biopsychologie, Institut fur Kognitive Neurowissenschaft, Fakultat fur Psychologie, Ruhr-Universitat Bochum, 44780 Bochum, Germany. yumyam@bio.psy.ruhr-uni-bochum.de |
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1435-9448 |
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PMID:15069613 |
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Equine Behaviour @ team @ |
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2527 |
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Author |
Chappell, J.; Kacelnik, A. |
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Title |
Selection of tool diameter by New Caledonian crows Corvus moneduloides |
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Journal Article |
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Year |
2004 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
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Volume |
7 |
Issue |
2 |
Pages |
121-127 |
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Keywords |
Animals; Behavior, Animal; *Choice Behavior; Discrimination Learning; *Feeding Behavior; Female; Functional Laterality; *Manufactured Materials; *Plant Leaves; *Problem Solving; *Songbirds; Technology |
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One important element of complex and flexible tool use, particularly where tool manufacture is involved, is the ability to select or manufacture appropriate tools anticipating the needs of any given task-an ability that has been rarely tested in non-primates. We examine aspects of this ability in New Caledonian crows-a species known to be extraordinary tool users and manufacturers. In a 2002 study, Chappell and Kacelnik showed that these crows were able to select a tool of the appropriate length for a task among a set of different lengths, and in 2002, Weir, Chappell and Kacelnik showed that New Caledonian crows were able to shape unfamiliar materials to create a usable tool for a specific task. Here we examine their handling of tool diameter. In experiment 1, we show that when facing three loose sticks that were usable as tools, they preferred the thinnest one. When the three sticks were presented so that one was loose and the other two in a bundle, they only disassembled the bundle when their preferred tool was tied. In experiment 2, we show that they manufacture, and modify during use, a tool of a suitable diameter from a tree branch, according to the diameter of the hole through which the tool will have to be inserted. These results add to the developing picture of New Caledonian crows as sophisticated tool users and manufacturers, having an advanced level of folk physics. |
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Department of Zoology, South Parks Road, OX1 3PS, Oxford, UK. jackie.chappell@zoo.ox.ac.uk |
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1435-9448 |
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PMID:15069612 |
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Equine Behaviour @ team @ |
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2528 |
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