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	Author	Flack, J.C.; Jeannotte, L.A.; de Waal, F.B.M.
	Title	Play signaling and the perception of social rules by juvenile chimpanzees (Pan troglodytes)			Type	Journal Article
	Year	2004	Publication	Journal of comparative psychology (Washington, D.C. : 1983)	Abbreviated Journal	J Comp Psychol
	Volume	118	Issue	2	Pages	149-159
	Keywords	Age Factors; Animals; Behavior, Animal; Female; Male; Pan troglodytes; Play and Playthings; Recognition (Psychology); Signal Detection (Psychology); *Social Perception
	Abstract	Prescriptive social rules are enforced statistical regularities. The authors investigated whether juvenile chimpanzees (Pan troglodytes) recognize and use enforced statistical regularities to guide dyadic play behavior. They hypothesized (a) that proximity of adults, especially mothers of younger play partners, to play bouts will increase the play signaling of older partners and (b) that when juvenile-juvenile play bouts occur in proximity to adults, older partners will play at a lower intensity than when no adults are present. They found that older and younger partners increase their play signaling in the presence of the mothers of younger partners, particularly as the intensity of play bouts increases. In contrast to their hypothesis, older partners played more roughly when the mothers of younger partners were in proximity. These results suggest that juvenile chimpanzees increase play signaling to prevent termination of the play bouts by mothers of younger partners.
	Address	Santa Fe Institute, NM 97501, USA. jflack@santafe.edu
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0735-7036	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:15250802			Approved	no
	Call Number	refbase @ user @			Serial	172
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	Author	Nissani, M.
	Title	Do Asian elephants (Elephas maximus) apply causal reasoning to tool-use tasks?			Type	Journal Article
	Year	2006	Publication	Journal of Experimental Psychology. Animal Behavior Processes	Abbreviated Journal	J Exp Psychol Anim Behav Process
	Volume	32	Issue	1	Pages	91-96
	Keywords	Age Factors; Animals; Behavior, Animal; Conditioning, Operant; Decision Making; Discrimination (Psychology); Elephants; Female
	Abstract	Two experiments addressed contradictory claims about causal reasoning in elephants. In Experiment 1, 4 Asian elephants (Elephas maximus) were pretrained to remove a lid from the top of a bucket and retrieve a food reward. Subsequently, in the first 5 critical trials, when the lid was placed alongside the bucket and no longer obstructed access to the reward, each elephant continued to remove the lid before retrieving the reward. Experiment 2, which involved 11 additional elephants and variations of the original design, yielded similarly counterintuitive observations. Although the results are open to alternative interpretations, they appear more consistent with associative learning than with causal reasoning. Future applications of Fabrean methodologies (J. H. Fabre, 1915) to animal cognition are proposed.
	Address	Departmetn of Interdisciplinary Studies, Wayne State University, Detroit, MI 48202, USA. moti.nissani@wayne.edu
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0097-7403	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:16435969			Approved	no
	Call Number	Equine Behaviour @ team @			Serial	2763
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	Author	Vlamings, P.H.J.M.; Uher, J.; Call, J.
	Title	How the great apes (Pan troglodytes, Pongo pygmaeus, Pan paniscus, and Gorilla gorilla) perform on the reversed contingency task: the effects of food quantity and food visibility			Type	Journal Article
	Year	2006	Publication	Journal of Experimental Psychology. Animal Behavior Processes	Abbreviated Journal	J Exp Psychol Anim Behav Process
	Volume	32	Issue	1	Pages	60-70
	Keywords	Age Factors; Animals; Behavior, Animal/physiology; Cognition; Conditioning (Psychology); Female; Food; Gorilla gorilla/psychology; Learning; Male; Pan paniscus/psychology; Pan troglodytes/psychology; Pongo pygmaeus/psychology; *Visual Perception
	Abstract	S. T. Boysen and G. G. Berntson (1995) found that chimpanzees performed poorly on a reversed contingency task in which they had to point to the smaller of 2 food quantities to acquire the larger quantity. The authors compared the performance of 4 great ape species (Pan troglodytes, Pongo pygmaeus, Pan paniscus, and Gorilla gorilla) on the reversed contingency task while manipulating food quantity (0-4 or 1-4) and food visibility (visible pairs or covered pairs). Results showed no systematic species differences but large individual differences. Some individuals of each species were able to solve the reversed contingency task. Both quantity and visibility of the food items had a significant effect on performance. Subjects performed better when the disparity between quantities was smaller and the quantities were not directly visible.
	Address	Department of Developmental and Comparative Psychology, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany. p.vlamings@psychology.unimaas.nl
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0097-7403	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:16435965			Approved	no
	Call Number	Equine Behaviour @ team @			Serial	2765
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	Author	Nakamura, K.
	Title	Perseverative errors in object discrimination learning by aged Japanese monkeys (Macaca fuscata)			Type	Journal Article
	Year	2001	Publication	Journal of Experimental Psychology. Animal Behavior Processes	Abbreviated Journal	J Exp Psychol Anim Behav Process
	Volume	27	Issue	4	Pages	345-353
	Keywords	Age Factors; Animals; Behavior, Animal/physiology; Cognition Disorders/diagnosis/physiopathology; Discrimination Learning/physiology; Frontal Lobe/physiopathology; Macaca; Neuropsychological Tests
	Abstract	To examine the nature of age-dependent cognitive decline, performance in terms of concurrent object discriminations was assessed in aged and nonaged Japanese monkeys (Macaca fuscata). Aged monkeys required more sessions and committed more errors than nonaged ones in the discriminations, even in simple object discriminations. Analyses of errors suggest that aged monkeys repeated the same errors and committed more errors when they chose a negative object at the 1st trial. A hypothesis analysis of behavior suggests that their incorrect choices were mainly due to object preference. Therefore, the impairment was probably caused by a failure to inhibit inappropriate responses. Together with previous neuropsychological findings, deficits of aged monkeys in the performance of object discriminations can be explained by dysfunction of the frontal cortex.
	Address	Department of Behavioral and Brain Sciences, Primate Research Institute, Kyoto University, Inuyama, Aichi 484-8506, Japan. knakamur@pri.kyoto-u.ac.jp
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0097-7403	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:11676085			Approved	no
	Call Number	Equine Behaviour @ team @			Serial	2771
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	Author	Johnston, C.; Holm, K.R.; Erichsen, C.; Eksell, P.; Drevemo, S.
	Title	Kinematic evaluation of the back in fully functioning riding horses			Type	Journal Article
	Year	2004	Publication	Equine Veterinary Journal	Abbreviated Journal	Equine Vet J
	Volume	36	Issue	6	Pages	495-498
	Keywords	Age Factors; Animals; Back/physiology; Back Pain/diagnosis/veterinary; Biomechanics; Exercise Test/veterinary; Female; Gait/physiology; Horse Diseases/diagnosis; Horses/physiology; Male; Movement/physiology; Sex Factors
	Abstract	REASONS FOR PERFORMING STUDY: Clinical history and examination are important features in diagnosis of equine back dysfunction. However, interpretation is subjective and therefore may vary substantially. OBJECTIVES: To establish a clinical tool to objectively evaluate the function of the equine back, in the form of a database on the kinematics of the back at the walk and trot in fully functioning riding horses. METHODS: Thirty-three fully functioning riding horses walked and trotted on a treadmill. Morphometrics and kinematics were tested for correlations to age, height, weight and stride length, and differences between gender (geldings and mares) and use (dressage and showjumping). RESULTS: A database for range of movement and symmetry of movement for extension and flexion, lateral bending, lateral excursion and axial rotation was presented. Symmetry values were very high for all variables. Significant differences were observed in use and gender. Age was negatively correlated to extension and flexion of the thoracolumbar junction. CONCLUSIONS: Interrelationships between use, gender and age to conformation and movement were established. POTENTIAL RELEVANCE: The database provides a basis for objective reference for diagnosis, therapy and rehabilitation of clinical cases of back dysfunction.
	Address	Departments of Anatomy and Histology, 75007 Uppsala, Sweden
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0425-1644	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:15460073			Approved	no
	Call Number	Equine Behaviour @ team @			Serial	3716
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	Author	Call, J.
	Title	Inferences by exclusion in the great apes: the effect of age and species			Type	Journal Article
	Year	2006	Publication	Animal Cognition	Abbreviated Journal	Anim. Cogn.
	Volume	9	Issue	4	Pages	393-403
	Keywords	Age Factors; Animals; Association Learning; Cognition; Concept Formation; Discrimination Learning; Female; Gorilla gorilla; Hominidae/classification/psychology; Male; Pan paniscus; Pan troglodytes; Pongo pygmaeus; *Problem Solving; Species Specificity
	Abstract	This study investigated the ability of chimpanzees, gorillas, orangutans, and bonobos to make inferences by exclusion using the procedure pioneered by Premack and Premack (Cognition 50:347-362, 1994) with chimpanzees. Thirty apes were presented with two different food items (banana vs. grape) on a platform and covered with identical containers. One of the items was removed from the container and placed between the two containers so that subjects could see it. After discarding this item, subjects could select between the two containers. In Experiment 1, apes preferentially selected the container that held the item that the experimenter had not discarded, especially if subjects saw the experimenter remove the item from the container (but without seeing the container empty). Experiment 3 in which the food was removed from one of the containers behind a barrier confirmed these results. In contrast, subjects performed at chance levels when a stimulus (colored plastic chip: Exp. 1; food item: Exp. 2 and Exp. 3) designated the item that had been removed. These results indicated that apes made inferences, not just learned to use a discriminative cue to avoid the empty container. Apes perceived and treated the item discarded by the experimenter as if it were the very one that had been hidden under the container. Results suggested a positive relationship between age and inferential ability independent of memory ability but no species differences.
	Address	Max Planck Institute for Evolutionary Anthropology, Deutscher Platz 6, 04103, Leipzig, Germany. call@eva.mpg.de
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	1435-9448	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:16924458			Approved	no
	Call Number	Equine Behaviour @ team @			Serial	2444
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	Author	Harkins, J.D.; Kamerling, S.G.; Church, G.
	Title	Effect of competition on performance of thoroughbred racehorses			Type	Journal Article
	Year	1992	Publication	Journal of Applied Physiology (Bethesda, Md. : 1985)	Abbreviated Journal	J Appl Physiol
	Volume	72	Issue	3	Pages	836-841
	Keywords	Age Factors; Animals; Anxiety/physiopathology; Competitive Behavior/physiology; Exertion/physiology; Fatigue/physiopathology; Female; Heart Rate; Horses/*physiology; Lactates/blood; Lactic Acid; Male; Sex Characteristics
	Abstract	The effect of competition and the influence of age and sex on performance were examined in a study of 18 Thoroughbred racehorses. The horses performed two solo and two competitive runs at 1,200 and 1,600 m for a total of eight runs. No group ran faster during competition, which may have been a reflection of the quality of horses used for this study and their susceptibility to stress-induced impairment of performance. Males showed no significant difference between competitive and solo run times, whereas females were consistently slower during competition. Males ran significantly faster than females in all runs. There was no difference in run times due to age, which may have been due to the high mean age (5.9 yr) of the group. The slower competitive run times may have occurred because of an earlier onset of fatigue when compared with solo runs. Plasma lactate was significantly greater for the 1,200-m competitive than for the solo runs.
	Address	Department of Veterinary Physiology, Pharmacology, and Toxicology, School of Veterinary Medicine, Louisiana State University, Baton Rouge 70803
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	8750-7587	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:1568979			Approved	no
	Call Number	refbase @ user @			Serial	1947
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	Author	Khalil, A.M.; Murakami, N.; Kaseda, Y.
	Title	Relationship between plasma testosterone concentrations and age, breeding season and harem size in Misaki feral horses			Type	Journal Article
	Year	1998	Publication	The Journal of veterinary medical science / the Japanese Society of Veterinary Science	Abbreviated Journal	J Vet Med Sci
	Volume	60	Issue	5	Pages	643-645
	Keywords	Age Factors; Animals; Animals, Wild; Horses; Japan; Male; Reproduction; Seasons; Sexual Behavior, Animal; Sexual Maturation; Social Behavior; Testosterone/*blood
	Abstract	Jugular vein blood samples were collected from 23 young and sexual mature feral stallions to examine the relationship between plasma testosterone concentration and age, breeding season or harem size. Testosterone concentration increased with the age of the stallions until they formed their own harems, at about 4 to 6 years old. Seasonal variations in testosterone concentrations were observed, and found to be significantly higher (P<0.001) throughout the breeding season than non-breeding season, from 3 years of age. Testosterone levels were correlated with harem size for individual stallions. It can be inferred from these results that there is a relationship between plasma testosterone concentration and age, breeding season and harem size.
	Address	Laboratory of Animal Behavioral Science, Faculty of Agriculture, Miyazaki University, Japan
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0916-7250	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:9637303			Approved	no
	Call Number	refbase @ user @			Serial	137
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	Author	Borsari, A.; Ottoni, E.B.
	Title	Preliminary observations of tool use in captive hyacinth macaws (Anodorhynchus hyacinthinus)			Type	Journal Article
	Year	2005	Publication	Animal Cognition	Abbreviated Journal	Anim. Cogn.
	Volume	8	Issue	1	Pages	48-52
	Keywords	Age Factors; Animals; Feeding Behavior; Female; Intelligence; Male; Motor Skills; Nuts; *Parrots
	Abstract	Many animals use tools (detached objects applied to another object to produce an alteration in shape, position, or structure) in foraging, for instance, to access encapsulated food. Descriptions of tool use by hyacinth macaws (Anodorhynchus hyacinthinus) are scarce and brief. In order to describe one case of such behavior, six captive birds were observed while feeding. Differences in nut manipulation and opening proficiency between adults and juveniles were recorded. The tools may be serving as a wedge, preventing the nut from slipping and/or rotating, reducing the impact of opening, or providing mechanical aid in its positioning and/or use of force. Data suggest that birds of this species have an innate tendency to use objects (tools) as aids during nut manipulation and opening.
	Address	Laboratory of Cognitive Ethology, Department of Experimental Psychology, Institute of Psychology, University of Sao Paulo, Sao Paulo, Brazil. borsari@hotmail.com
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	1435-9448	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:15248094			Approved	no
	Call Number	Equine Behaviour @ team @			Serial	2518
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	Author	Cambefort, J.P.
	Title	A comparative study of culturally transmitted patterns of feeding habits in the chacma baboon Papio ursinus and the vervet monkey Cercopithecus aethiops			Type	Journal Article
	Year	1981	Publication	Folia Primatologica; International Journal of Primatology	Abbreviated Journal	Folia Primatol (Basel)
	Volume	36	Issue	3-4	Pages	243-263
	Keywords	Age Factors; Animals; Cercopithecus; Cercopithecus aethiops; Culture; Feeding Behavior; Female; Group Structure; Learning; Male; Papio; Social Class; Teaching
	Abstract	Japanese workers have studied social acquisition patterns of new feeding habits in Macaca fuscata which they have termed precultural. The present study investigates the same phenomenon in the chacma baboon and the vervet monkey in their natural habitat. The questions addressed are: (1) How a new feeding habit enters a troop and by which age and sex category, also how it is propagated? (2) When individuals are permitted with a choice between palatable and unpalatable food, can they learn by demonstration only or do they have to pass through a direct learning process? (3) Can the results from the above questions be explained by social parameters such as the social structure of the individual species? It was found that juvenile baboons discover new food and that after the discovery propagation is instantaneous. In vervets discovery is random among the age classes and propagation is slow and takes place through certain 'pivot' individuals. Both species fail to learn about palatability by demonstration but have to go through a direct learning process. This contrasts strongly with the forest baboon Mandrillus sphinx that have been shown to learn by demonstration. Socially, baboon juveniles stay closer to each other than the adults who force them to live at the periphery of the troop. Vervets again forage without precise sub-group formation. The link between social and cultural propagation and social structure is discussed on the basis of these findings.
	Address
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0015-5713	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:7319426			Approved	no
	Call Number				Serial	2087
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