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Author Laland, K. N.; Richerson, P. J.; Boyd, R.
Title Developing a theory of animal social learning. Type Book Chapter
Year 1996 Publication Social learning in animals: the roots of culture. Abbreviated Journal
Volume Issue Pages 129-154
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Publisher Academic Press Place of Publication San Diego, California Editor Heyes, C. M.;Galef,B. G. J.
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Call Number Equine Behaviour @ team @ home Serial 4093
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Author Boyd, R.; Richerson, P.J.
Title Why Culture is Common, but Cultural Evolution is Rare Type Journal Article
Year 1996 Publication Proceedings of the British Academy Abbreviated Journal Proc Br Acad
Volume 88 Issue Pages 73-93
Keywords cultural distributed evolution primates
Abstract If culture is defined as variation acquired and maintained by social learning, then culture is common in nature. However, cumulative cultural evolution resulting in behaviors that no individual could invent on their own is limited to humans, song birds, and perhaps chimpanzees. Circumstantial evidence suggests that cumulative cultural evolution requires the capacity for observational learning. Here, we analyze two models the evolution of psychological capacities that allow cumulative cultural evolution. Both models suggest that the conditions which allow the evolution of such capacities when rare are much more stringent than the conditions which allow the maintenance of the capacities when common. This result follows from the fact that the assumed benefit of the capacities, cumulative cultural adaptation, cannot occur when the capacities are rare. These results suggest why such capacities may be rare in nature.
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Publisher Royal Society/British Academy Place of Publication Editor
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Notes http://www.proc.britac.ac.uk/cgi-bin/somsid.cgi?page=summaries/pba88#boyd Approved no
Call Number Equine Behaviour @ team @ Serial 4195
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Author Templeton, J.J.; Giraldeau, L.-A.
Title Vicarious sampling: the use of personal and public information by starlings foraging in a simple patchy environment Type Journal Article
Year 1996 Publication Behavioral Ecology and Sociobiology Abbreviated Journal Behav. Ecol. Sociobiol.
Volume 38 Issue 2 Pages 105-114
Keywords Social foraging ? Patch sampling ? Public information ? Sturnidae
Abstract Group foragers may be able to assess patch quality more efficiently by paying attention to the sampling activities of conspecifics foraging in the same patch. In a previous field experiment, we showed that starlings foraging on patches of hidden food could use the successful foraging activities of others to help them assess patch quality. In order to determine whether a starling could also use another individual's lack of foraging success to assess and depart from empty patches more quickly, we carried out two experimental studies which compared the behaviour of captive starlings sampling artificial patches both when alone and when in pairs. Solitary starlings were first trained to assess patch quality in our experimental two-patch system, and were then tested on an empty patch both alone and with two types of partner bird. One partner sampled very few holes and thus provided a low amount of public information; the other sampled numerous holes and thus provided a high amount of public information. In experiment 1, we found no evidence of vicarious sampling. Subjects sampled a similar number of empty holes when alone as when with the low and high information partners; thus they continued to rely on their own personal information to make their patch departure decisions. In experiment 2, we modified the experimental patches, increasing the ease with which a bird could watch another's sampling activities, and increasing the difficulty of acquiring accurate personal sampling information. This time, subjects apparently did use public information, sampling fewer empty holes before departure when with the high-information partner than when with the low-information partner, and sampling fewer holes when with the low-information partner than when alone. We suggest that the degree to which personal and public information are used is likely to depend both on a forager's ability to remember where it has already sampled and on the type of environment in which foraging takes place.
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Call Number Equine Behaviour @ team @ Serial 4198
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Author Lebelt, D.; Schönreiter, S.; Zanella, A. J.
Title Salivary cortisol in stallions: the relationship with plasma levels, daytime profile and changes in response to semen collection Type Journal Article
Year 1996 Publication Pferdeheilkunde Abbreviated Journal Pferdeheilkunde
Volume 14 Issue 4 Pages 411-414
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Call Number Equine Behaviour @ team @ Serial 4282
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Author Miller, R.M.
Title How we can quickly assume the role of horse herd leader: Making horses compliant and willing subjects Type Journal Article
Year 1996 Publication Journal of Equine Veterinary Science Abbreviated Journal
Volume 16 Issue 1 Pages 4-7
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Call Number Equine Behaviour @ team @ Serial 4329
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Author Barton, R.A.
Title Neocortex size and behavioural ecology in primates Type Journal Article
Year 1996 Publication Proceedings of the Royal Society B Abbreviated Journal Proc. R. Soc. Lond. B
Volume 263 Issue 1367 Pages 173-177
Keywords Animals; *Behavior, Animal; Brain/*anatomy & histology; Cerebral Cortex/*anatomy & histology/*physiology; *Ecology; Evolution; Primates/anatomy & histology/*physiology/psychology; Regression Analysis; Species Specificity
Abstract The neocortex is widely held to have been the focus of mammalian brain evolution, but what selection pressures explain the observed diversity in its size and structure? Among primates, comparative studies suggest that neocortical evolution is related to the cognitive demands of sociality, and here I confirm that neocortex size and social group size are positively correlated once phylogenetic associations and overall brain size are taken into account. This association holds within haplorhine but not strepsirhine primates. In addition, the neocortex is larger in diurnal than in nocturnal primates, and among diurnal haplorhines its size is positively correlated with the degree of frugivory. These ecological correlates reflect the diverse sensory-cognitive functions of the neocortex.
Address Department of Anthropology, University of Durham
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Publisher Place of Publication Editor
Language English Summary Language Original Title
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ISSN 0962-8452 ISBN (up) Medium
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Notes PMID:8728982 Approved no
Call Number Equine Behaviour @ team @ Serial 4783
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Author Reboreda, J.C.; Clayton, N.S.; Kacelnik, A.
Title Species and sex differences in hippocampus size in parasitic and non-parasitic cowbirds Type Journal Article
Year 1996 Publication Neuroreport Abbreviated Journal Neuroreport
Volume 7 Issue 2 Pages 505-508
Keywords Animals; Birds/*physiology; Female; Hippocampus/*anatomy & histology; Male; Nesting Behavior/*physiology; Sex Characteristics; Species Specificity; Telencephalon/anatomy & histology
Abstract To test the hypothesis that selection for spatial abilities which require birds to locate and to return accurately to host nests has produced an enlarged hippocampus in brood parasites, three species of cowbird were compared. In shiny cowbirds, females search for host nests without the assistance of the male; in screaming cowbirds, males and females inspect hosts' nests together; in bay-winged cowbirds, neither sex searches because this species is not a brood parasite. As predicted, the two parasitic species had a relatively larger hippocampus than the non-parasitic species. There were no sex differences in relative hippocampus size in screaming or bay-winged cowbirds, but female shiny cowbirds had a larger hippocampus than the male.
Address Instituto de Biologia y Medicina Experimental-CONICET, Buenos Aires, Argentina
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ISSN 0959-4965 ISBN (up) Medium
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Notes PMID:8730816 Approved no
Call Number Equine Behaviour @ team @ Serial 4798
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Author Gallese, V.; Fadiga, L.; Fogassi, L.; Rizzolatti, G.
Title Action recognition in the premotor cortex Type Journal Article
Year 1996 Publication Brain Abbreviated Journal
Volume 119 Issue 2 Pages 593-609
Keywords action encoding; visual responses; premotor cortex; macaque monkey
Abstract We recorded electrical activity from 532 neurons in the rostral part of inferior area 6 (area F5) of two macaque monkeys. Previous data had shown that neurons of this area discharge during goal-directed hand and mouth movements. We describe here the properties of a newly discovered set of F5 neurons ( mirror neurons', n = 92) all of which became active both when the monkey performed a given action and when it observed a similar action performed by the experimenter. Mirror neurons, in order to be visually triggered, required an interaction between the agent of the action and the object of it. The sight of the agent alone or of the object alone (three-dimensional objects, food) were ineffective. Hand and the mouth were by far the most effective agents. The actions most represented among those activating mirror neurons were grasping, manipulating and placing. In most mirror neurons (92%) there was a clear relation between the visual action they responded to and the motor response they coded. In [~]30% of mirror neurons the congruence was very strict and the effective observed and executed actions corresponded both in terms of general action (e.g. grasping) and in terms of the way in which that action was executed (e.g. precision grip). We conclude by proposing that mirror neurons form a system for matching observation and execution of motor actions. We discuss the possible role of this system in action recognition and, given the proposed homology between F5 and human Brocca's region, we posit that a matching system, similar to that of mirror neurons exists in humans and could be involved in recognition of actions as well as phonetic gestures.
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Notes 10.1093/brain/119.2.593 Approved no
Call Number Equine Behaviour @ team @ Serial 5012
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Author Hausberger, M.; Le Scolan, N.; Muller, C.; Gautier, E.; Wolff, A.
Title Individual behavioural characteristics in horses: predictability, endogenous and environmental factors Type Journal Article
Year 1996 Publication Journée d`Etude Abbreviated Journal Journée d`Etude
Volume 22 Issue Pages 113- 123
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Publisher Insitute du Cheval Place of Publication Paris Editor
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Call Number Equine Behaviour @ team @ Serial 5023
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Author Hama, H.; Yogo, M.; Matsuyama, Y.
Title Effects of stroking horses on both humans' and horses' heart rate responses Type Journal Article
Year 1996 Publication Japanese Psychological Research Abbreviated Journal Jpn. Psychol. Res.
Volume 38 Issue 2 Pages 66-73
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Abstract The present study examined both human and horse heart rates (HRs) when humans stroked horses for 90 seconds; the subjective arousal levels of the humans were measured by the Tohoku Activation Deactivation Adjective Check List before and after stroking horses. Six male subjects with a positive attitude toward companion animals and 6 male subjects with a negative attitude were selected by their scores on the Pet Attitude Scale, and these two groups, together with a third group, of 6 subjects who were male members of the Doshisha University horse-riding club, participated in this experiment. The HRs of the human subjects during the first 10 seconds immediately after the stroking began were significantly higher than those obtained after that period, but these higher levels gradually returned to baseline levels. This tendency appears more clearly in the negative attitude group. The HRs of the horses increased during the first 20 seconds immediately after the human subjects of the NA group started stroking them, but gradually reduced as the stroking continued. The results of subjective arousal levels suggest a decrease in tension by stroking horses. These results suggest that a certain affectional interaction may exist between humans and companion animals.
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Call Number Equine Behaviour @ team @ Serial 5056
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