Equine and Animal Cognition Reference Database -- Query Results

	Equine and Animal Cognition Reference Database Home \| Show All \| Simple Search \| Advanced Search	Login Quick Search: Field: contains: ...
	131-140 of 228 records found matching your query:

Search & Display Options

Select All Deselect All

[1–10] << 11 12 13 14 15 16 17 18 19 20 >> [21–23]

List View

Citations

Details

	Records
	Author	Shettleworth, S.J.; Sutton, J.E.
	Title	Multiple systems for spatial learning: dead reckoning and beacon homing in rats			Type	Journal Article
	Year	2005	Publication	Journal of experimental psychology. Animal behavior processes	Abbreviated Journal	J Exp Psychol Anim Behav Process
	Volume	31	Issue	2	Pages	125-141
	Keywords	Animals; Behavior, Animal; Cues; Feeding Behavior; Habituation, Psychophysiologic; Homing Behavior; Learning; Male; Rats; Rats, Long-Evans; Space Perception
	Abstract	Rats homed with food in a large lighted arena. Without visual cues, they used dead reckoning. When a beacon indicated the home, rats could also use the beacon. Homing did not differ in 2 groups of rats, 1 provided with the beacon and 1 without it; tests without the beacon gave no evidence that beacon learning overshadowed dead reckoning (Experiment 1). When the beacon was at the home for 1 group and in random locations for another, there was again no evidence of cue competition (Experiment 2). Dead reckoning experience did not block acquisition of beacon homing (Experiment 3). Beacon learning and dead reckoning do not compete for predictive value but acquire information in parallel and are used hierarchically.
	Address	Department of Psychology, University of Toronto, Toronto, ON M5S 3G3, Canada. shettle@psych.utoronto.ca
	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:15839771			Approved	no
	Call Number	refbase @ user @			Serial	364
Permanent link to this record



	Author	Hemelrijk, C.K.; Wantia, J.
	Title	Individual variation by self-organisation			Type	Journal Article
	Year	2005	Publication	Neuroscience and biobehavioral reviews	Abbreviated Journal	Neurosci Biobehav Rev
	Volume	29	Issue	1	Pages	125-136
	Keywords	Aggression; Animals; Behavior, Animal/physiology; Competitive Behavior/physiology; Female; Humans; Individuality; Male; Models, Psychological; Sex Characteristics; Social Dominance; Time Factors
	Abstract	In this paper, we show that differences in dominance and spatial centrality of individuals in a group may arise through self-organisation. Our instrument is a model, called DomWorld, that represents two traits that are often found in animals, namely grouping and competing. In this model individual differences grow under the following conditions: (1) when the intensity of aggression increases and grouping becomes denser, (2) when the degree of sexual dimorphism in fighting power increases. In this case the differences among females compared to males grow too, (3) when, upon encountering another individual, the tendency to attack is 'obligate' and not conditional, namely 'sensitive to risks'. Results resemble phenomena described for societies of primates, mice, birds and pigs.
	Address	Theoretical Biology, University of Groningen, NN Haren, The Netherlands. hemelrij@ifi.unizh.ch
	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	0149-7634	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:15652260			Approved	no
	Call Number	refbase @ user @			Serial	443
Permanent link to this record



	Author	Hanggi, E.B.
	Title	The Thinking Horse: Cognition and Perception			Type	Conference Article
	Year	2005	Publication	International Veterinary Information Service	Abbreviated Journal	AAEP
	Volume	51	Issue		Pages
	Keywords
	Abstract	Cognition and perception in horses has often been misunderstood. Not only in the past but even today, people proclaim that horses react only by instinct, that they are just conditioned-response animals, that they lack advanced cognitive ability, and that they have poor visual capabilities (e.g., acuity, color vision, depth perception). Until relatively recently, there was little scientific evidence to address such beliefs. Change, however, is underway as scientific and public interest in all aspects of equine learning and perception intensifies. A review of the scientific literature, as well as practical experience, shows that horses excel at simpler forms of learning such as classical and operant conditioning, which is not surprising considering their trainability when these principles and practices are applied. Furthermore, horses have shown ease in stimulus generalization and discrimination learning. Most recently and unexpected by many, horses have solved advanced cognitive challenges involving categorization learning and some degree of concept formation. A comprehensive understanding of the cognitive and perceptual abilities of horses is necessary to ensure that this species receives proper training, handling, management, and care.
	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		ISBN		Medium
	Area		Expedition		Conference
	Notes				Approved	no
	Call Number	refbase @ user @			Serial	465
Permanent link to this record



	Author	Hare, B.; Tomasello, M.
	Title	Human-like social skills in dogs?			Type	Journal Article
	Year	2005	Publication	Trends in Cognitive Sciences	Abbreviated Journal	Trends. Cognit. Sci.
	Volume	9	Issue	9	Pages	439-444
	Keywords	Animal Communication; Animals; Behavior, Animal; Cognition/physiology; Dogs; Evolution; Humans; *Social Behavior
	Abstract	Domestic dogs are unusually skilled at reading human social and communicative behavior--even more so than our nearest primate relatives. For example, they use human social and communicative behavior (e.g. a pointing gesture) to find hidden food, and they know what the human can and cannot see in various situations. Recent comparisons between canid species suggest that these unusual social skills have a heritable component and initially evolved during domestication as a result of selection on systems mediating fear and aggression towards humans. Differences in chimpanzee and human temperament suggest that a similar process may have been an important catalyst leading to the evolution of unusual social skills in our own species. The study of convergent evolution provides an exciting opportunity to gain further insights into the evolutionary processes leading to human-like forms of cooperation and communication.
	Address	Max Planck Institute for Evolutionary Anthropology, Deutscher Platz 6, Leipzig, Germany. hare@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	1364-6613	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:16061417			Approved	no
	Call Number	refbase @ user @			Serial	546
Permanent link to this record



	Author	Digweed, Shannon M.; Fedigan, Linda M.; Rendall, Drew
	Title	Variable specificity in the anti-predator vocalizations and behaviour of the white-faced capuchin, Cebus capucinus			Type	Journal Article
	Year	2005	Publication	Behaviour	Abbreviated Journal	Behaviour
	Volume	142	Issue	8	Pages	997-1021
	Keywords
	Abstract	(Accepted: 23 June 2005) Summary Much research in animal communication is aimed at understanding the functional design features of animal vocal signals. Our detailed analyses of the vocalizations and behavioural responses elicited in white-faced capuchins by predators and other disturbances point to two call variants that differ modestly in their acoustic structure and that are accompanied by functionally distinct behavioural responses. The first variant is given exclusively to avian predators and is almost invariably accompanied by the monkeys immediate descent from the treetops where it is most vulnerable; therefore, we label this call variant the aerial predator alarm?. The second variant, that differs only slightly but noticeably from the first, is given to a wide range of snakes and mammals, including a range of species that represent no predatory threat to the monkeys. This second call is also associated with more variable responses from calling monkeys, from delayed retreat from the source of disturbance, to active approach, inspection, and sometimes mobbing of the animal involved. We therefore label this variant more generally as an “alerting call”. Although some other primate species show a more diverse system of anti-predator calls, and the capuchins themselves may yet be found to produce a greater variety of calls, a system of two call variants with varying degrees of predator specificity and behavioural response is not uncommon among primates and appears functionally appropriate for capuchins. The basic structure of the alerting call allows conspecific listeners to localize the caller and the source of disturbance readily, thereby allowing listeners to approach and assist in mobbing in cases where the disturbance warrants it, or to avoid the area in cases where the disturbance is identified as a predatory threat. Conversely, the aerial predator alarm is inherently less localizable and therefore conveys the
	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		ISBN		Medium
	Area		Expedition		Conference
	Notes				Approved	no
	Call Number	refbase @ user @			Serial	547
Permanent link to this record



	Author	Zhou, W.-X.; Sornette, D.; Hill, R.A.; Dunbar, R.I.M.
	Title	Discrete hierarchical organization of social group sizes			Type	Journal Article
	Year	2005	Publication	Proceedings. Biological sciences / The Royal Society	Abbreviated Journal	Proc Biol Sci
	Volume	272	Issue	1561	Pages	439-444
	Keywords	Anthropology, Cultural; Group Structure; Humans; Models, Biological; Social Behavior; Social Environment
	Abstract	The 'social brain hypothesis' for the evolution of large brains in primates has led to evidence for the coevolution of neocortical size and social group sizes, suggesting that there is a cognitive constraint on group size that depends, in some way, on the volume of neural material available for processing and synthesizing information on social relationships. More recently, work on both human and non-human primates has suggested that social groups are often hierarchically structured. We combine data on human grouping patterns in a comprehensive and systematic study. Using fractal analysis, we identify, with high statistical confidence, a discrete hierarchy of group sizes with a preferred scaling ratio close to three: rather than a single or a continuous spectrum of group sizes, humans spontaneously form groups of preferred sizes organized in a geometrical series approximating 3-5, 9-15, 30-45, etc. Such discrete scale invariance could be related to that identified in signatures of herding behaviour in financial markets and might reflect a hierarchical processing of social nearness by human brains.
	Address	State Key Laboratory of Chemical Reaction Engineering, East China University of Science and Technology, Shanghai 200237, China
	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	0962-8452	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:15734699			Approved	no
	Call Number	refbase @ user @			Serial	549
Permanent link to this record



	Author	Moehlman, P.D.
	Title	Endangered wild equids			Type	Journal Article
	Year	2005	Publication	Scientific American	Abbreviated Journal	Sci Am
	Volume	292	Issue	3	Pages	74-81
	Keywords	Africa; Americas; Animals; Animals, Wild/physiology; Asia; Conservation of Energy Resources; Environment; *Equidae/physiology; Food Chain; Humans; Male; Reproduction
	Abstract
	Address	IUCN-The World Conservation Union/Species Survival Commission Equid Specialist Group
	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	0036-8733	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:15859216			Approved	no
	Call Number	refbase @ user @			Serial	551
Permanent link to this record



	Author	Suzuki, Y.; Toquenaga, Y.
	Title	Effects of information and group structure on evolution of altruism: analysis of two-score model by covariance and contextual analyses			Type	Journal Article
	Year	2005	Publication	Journal of theoretical biology	Abbreviated Journal	J. Theor. Biol.
	Volume	232	Issue	2	Pages	191-201
	Keywords	Altruism; Analysis of Variance; Communication; Cooperative Behavior; Evolution; Game Theory; Group Structure; Humans; Models, Genetic; Models, Psychological; Selection (Genetics); Trust
	Abstract	An altruistic individual has to gamble on cooperation to a stranger because it does not know whether the stranger is trustworthy before direct interaction. Nowak and Sigmund (Nature 393 (1998a) 573; J. Theor. Biol. 194 (1998b) 561) presented a new theoretical framework of indirect reciprocal altruism by image scoring game where all individuals are informed about a partner's behavior from its image score without direct interaction. Interestingly, in a simplified version of the image scoring game, the evolutionarily stability condition for altruism became a similar form of Hamilton's rule, i.e. inequality that the probability of getting correct information is more than the ratio of cost to benefit. Since the Hamilton's rule was derived by evolutionarily stable analysis, the evolutionary meaning of the probability of getting correct information has not been clearly examined in terms of kin and group selection. In this study, we applied covariance analysis to the two-score model for deriving the Hamilton's rule. We confirmed that the probability of getting correct information was proportional to the bias of altruistic interactions caused by using information about a partner's image score. The Hamilton's rule was dependent on the number of game bouts even though the information reduced the risk of cooperation to selfish one at the first encounter. In addition, we incorporated group structure to the two-score model to examine whether the probability of getting correct information affect selection for altruism by group selection. We calculated a Hamilton's rule of group selection by contextual analysis. Group selection is very effective when either the probability of getting correct information or that of future interaction, or both are low. The two Hamilton's rules derived by covariance and contextual analyses demonstrated the effects of information and group structure on the evolution of altruism. We inferred that information about a partner's behavior and group structure can produce flexible pathways for the evolution of altruism.
	Address	Integrative Environmental Sciences, Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1, Ten-Nou-Dai, Tsukuba, Ibaraki 305-8572, Japan. yukari@pe.ies.life.tsukuba.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	0022-5193	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:15530489			Approved	no
	Call Number	refbase @ user @			Serial	556
Permanent link to this record



	Author	Hare, B.; Plyusnina, I.; Ignacio, N.; Schepina, O.; Stepika, A.; Wrangham, R.; Trut, L.
	Title	Social cognitive evolution in captive foxes is a correlated by-product of experimental domestication			Type	Journal Article
	Year	2005	Publication	Current biology : CB	Abbreviated Journal	Curr Biol
	Volume	15	Issue	3	Pages	226-230
	Keywords	Animals; Animals, Domestic; Cognition/physiology; Cues; Evolution; Foxes/physiology; Selection (Genetics); Social Behavior; Species Specificity
	Abstract	Dogs have an unusual ability for reading human communicative gestures (e.g., pointing) in comparison to either nonhuman primates (including chimpanzees) or wolves . Although this unusual communicative ability seems to have evolved during domestication , it is unclear whether this evolution occurred as a result of direct selection for this ability, as previously hypothesized , or as a correlated by-product of selection against fear and aggression toward humans--as is the case with a number of morphological and physiological changes associated with domestication . We show here that fox kits from an experimental population selectively bred over 45 years to approach humans fearlessly and nonaggressively (i.e., experimentally domesticated) are not only as skillful as dog puppies in using human gestures but are also more skilled than fox kits from a second, control population not bred for tame behavior (critically, neither population of foxes was ever bred or tested for their ability to use human gestures) . These results suggest that sociocognitive evolution has occurred in the experimental foxes, and possibly domestic dogs, as a correlated by-product of selection on systems mediating fear and aggression, and it is likely the observed social cognitive evolution did not require direct selection for improved social cognitive ability.
	Address	Department of Anthropology, Harvard University, Cambridge, MA 02138, USA. hare@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	0960-9822	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:15694305			Approved	no
	Call Number	refbase @ user @			Serial	594
Permanent link to this record



	Author	Kitchen, D.M.; Cheney, D.L.; Seyfarth, R.M.
	Title	Male chacma baboons (Papio hamadryas ursinus) discriminate loud call contests between rivals of different relative ranks			Type	Journal Article
	Year	2005	Publication	Animal cognition	Abbreviated Journal	Anim. Cogn.
	Volume	8	Issue	1	Pages	1-6
	Keywords	Acoustic Stimulation; Animals; Discrimination Learning; Hierarchy, Social; Male; Papio hamadryas/psychology; Social Dominance; *Vocalization, Animal
	Abstract	Males in multi-male groups of chacma baboons (Papio hamadryas ursinus) in Botswana compete for positions in a linear dominance hierarchy. Previous research suggests that males treat different categories of rivals differently; competitive displays between males of similar rank are more frequent and intense than those between disparately ranked males. Here we test whether males also respond differently to male-male interactions in which they are not directly involved, using playbacks of the loud 'wahoo' calls exchanged between competing males in aggressive displays. We played paired sequences of vocal contests between two adjacently ranked and two disparately ranked males to ten subjects, half ranking below the signalers in the call sequences and half above. Subjects who ranked above the two signalers showed stronger responses than lower-ranking subjects. Higher-ranking subjects also responded more strongly to sequences involving disparately ranked, as opposed to adjacently ranked opponents, suggesting that they recognized those individuals' relative ranks. Strong responses to sequences between disparately ranked opponents might have occurred either because such contests typically involve resources of high fitness value (defense of meat, estrous females or infants vulnerable to infanticide) or because they indicate a sudden change in one contestant's condition. In contrast, subjects who ranked lower than the signalers responded equally strongly to both types of sequences. These subjects may have been able to distinguish between the two categories of opponents but did not respond differently to them because they had little to lose or gain by a rank reversal between males that already ranked higher than they did.
	Address	Department of Psychology, University of Pennsylvania, Philadelphia, PA 19104, USA. dkitchen@psych.upenn.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	1435-9448	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:15164259			Approved	no
	Call Number	refbase @ user @			Serial	687
Permanent link to this record

Select All Deselect All

[1–10] << 11 12 13 14 15 16 17 18 19 20 >> [21–23]

Details

CQL Search | Library Search | Show Record | Extract Citations

Help