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| Author |
Poling, A.; Temple, W.; Foster, T.M. |
| Title |
The differential outcomes effect: A demonstration in domestic chickens responding under a titrating-delayed-matching-to-sample procedure |
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Journal Article |
| Year |
1996 |
Publication |
Behavioural Processes |
Abbreviated Journal |
Behav. Process. |
| Volume |
36 |
Issue  |
2 |
Pages |
109-115 |
| Keywords |
Domestic hen; Titrating-delayed-matching-to-sample procedure; Differential outcomes effect; Conditional discrimination; Animal welfare |
| Abstract |
The differential outcomes effect refers to the increase in speed of acquisition or terminal accuracy that occurs in discrimination training when each of two or more discriminative stimuli is correlated with a different outcome (e.g. type of reinforcer). The present study demonstrated this effect in domestic hens exposed to a titrating-delayed-matching-to-sample procedure, under which correct responses increased (and incorrect responses decreased) the delay between the offset of a sample stimulus and the onset of two comparison stimuli. Colors of key illumination (red, green) were used as sample and comparison stimuli and correct responses resulted in 1- or 4-s food deliveries. When 1-s food deliveries consistently followed correct responses to one key color and 4-s food deliveries followed correct responses to the other key color, the maximum delay reached by the hens and their overall accuracy was significantly higher than when 1- and 4-s food deliveries were randomly arranged following correct responses to both key colors. These data constitute the first demonstration of the differential outcomes effect in chickens, and in any species evaluated under a titrating-delayed-matching-to-sample procedure. |
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Equine Behaviour @ team @ |
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3604 |
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Mal, M.E.; McCall ,C.A. |
| Title |
The influence of handling during different ages on a halter training test in foals |
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Journal Article |
| Year |
1996 |
Publication |
Applied Animal Behaviour Science |
Abbreviated Journal |
Appl. Anim. Behav. Sci. |
| Volume |
5 |
Issue |
2 |
Pages |
115-120 |
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Ten foals were used to determine effects of handling during different ages on their ability to perform a halter training test. Early-handled (EH) foals (n = 5) were handled in 10 min sessions 5 d weekly from 24 h after birth until 42 d of age, then were not handled from 43 to 84 d of age. Later-handled (LH) foals (n = 5) were not handled from birth to 42 d of age, then were handled in 10-min sessions 5 d weekly from 43 to 84 d of age. At 85 d of age, each foal was subjected to a 10 min halter training test for 5 consecutive d. The test consisted of an unfamiliar handler placing a halter on each foal and attempting to make the foal walk forward for 20 m. Data recorded during each d of the halter training were duration of initial struggle, number of lunges into the air, time to first forward step, time to five consecutive forward steps, and time to travel 20 m. At the end of the 5 d halter training test, the handler assigned a subjective test rating score to each foal based on ease of training. Split-plot analysis indicated that EH foals took less time (P < 0.05) to take one step forward, five consecutive steps forward, and to travel 20 m than LH foals. One-way ANOVA indicated that EH foals had a lower (more desirable) test ratings than LH foals (P < 0.01). Results indicate that handling throughout the first 42 d of life increased foal performance on this halter training task compared to handling from 43 to 84 d of age. These results may imply the existence of a critical handling period during the first 42 d of age or a phenomenon similar to learned helplessness |
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Equine Behaviour @ team @ http://www.ag.auburn.edu/ansc/ResPrograms/influ_age.html |
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3665 |
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Bermudez, J.L. |
| Title |
The moral significance of birth |
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Journal Article |
| Year |
1996 |
Publication |
Ethics |
Abbreviated Journal |
Ethics |
| Volume |
106 |
Issue |
2 |
Pages |
378-403 |
| Keywords |
Abortion, Induced; Animal Rights; Animals; Beginning of Human Life; Embryonic and Fetal Development; *Ethical Analysis; *Ethics; *Fetus; Homicide; Humans; *Individuality; *Infant, Newborn; Infant, Premature; Infanticide; *Labor, Obstetric; Life; *Personhood; Philosophy; Primates; Psychology; *Self Concept; *Value of Life; Analytical Approach; Genetics and Reproduction; Philosophical Approach |
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0014-1704 |
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PMID:11656645; KIE: 31 fn.; KIE: KIE BoB Subject Heading: fetuses; KIE: KIE BoB Subject Heading: personhood |
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Equine Behaviour @ team @ |
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4177 |
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Templeton, J.J.; Giraldeau, L.-A. |
| Title |
Vicarious sampling: the use of personal and public information by starlings foraging in a simple patchy environment |
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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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Equine Behaviour @ team @ |
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4198 |
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Reboreda, J.C.; Clayton, N.S.; Kacelnik, A. |
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Species and sex differences in hippocampus size in parasitic and non-parasitic cowbirds |
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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. |
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Instituto de Biologia y Medicina Experimental-CONICET, Buenos Aires, Argentina |
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0959-4965 |
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PMID:8730816 |
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Equine Behaviour @ team @ |
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4798 |
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Gallese, V.; Fadiga, L.; Fogassi, L.; Rizzolatti, G. |
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Action recognition in the premotor cortex |
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Journal Article |
| Year |
1996 |
Publication |
Brain |
Abbreviated Journal |
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119 |
Issue |
2 |
Pages |
593-609 |
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action encoding; visual responses; premotor cortex; macaque monkey |
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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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10.1093/brain/119.2.593 |
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Equine Behaviour @ team @ |
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5012 |
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Hama, H.; Yogo, M.; Matsuyama, Y. |
| Title |
Effects of stroking horses on both humans' and horses' heart rate responses |
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Journal Article |
| Year |
1996 |
Publication |
Japanese Psychological Research |
Abbreviated Journal |
Jpn. Psychol. Res. |
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38 |
Issue |
2 |
Pages |
66-73 |
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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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Equine Behaviour @ team @ |
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5056 |
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Barton, R.A. |
| Title |
Neocortex size and behavioural ecology in primates |
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Journal Article |
| Year |
1996 |
Publication |
Proceedings of the Royal Society B |
Abbreviated Journal |
Proc. R. Soc. Lond. B |
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263 |
Issue |
1367 |
Pages |
173-177 |
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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. |
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Department of Anthropology, University of Durham |
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English |
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0962-8452 |
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PMID:8728982 |
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Equine Behaviour @ team @ |
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4783 |
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Ballew, R.M.; Sabelko, J.; Gruebele, M. |
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Direct observation of fast protein folding: the initial collapse of apomyoglobin |
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Journal Article |
| Year |
1996 |
Publication |
Proceedings of the National Academy of Sciences of the United States of America |
Abbreviated Journal |
Proc. Natl. Acad. Sci. U.S.A. |
| Volume |
93 |
Issue |
12 |
Pages |
5759-5764 |
| Keywords |
Animals; Apoproteins/*chemistry; Circular Dichroism; Horses; Kinetics; Muscle, Skeletal/chemistry; Myoglobin/*chemistry; *Protein Folding; Spectrometry, Fluorescence; Spectrophotometry, Infrared; Temperature |
| Abstract |
The rapid refolding dynamics of apomyoglobin are followed by a new temperature-jump fluorescence technique on a 15-ns to 0.5-ms time scale in vitro. The apparatus measures the protein-folding history in a single sweep in standard aqueous buffers. The earliest steps during folding to a compact state are observed and are complete in under 20 micros. Experiments on mutants and consideration of steady-state CD and fluorescence spectra indicate that the observed microsecond phase monitors assembly of an A x (H x G) helix subunit. Measurements at different viscosities indicate diffusive behavior even at low viscosities, in agreement with motions of a solvent-exposed protein during the initial collapse. |
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School of Chemical Sciences and Beckman Institute for Advanced Science and Technology, University of Illinois, Urbana, 61801, USA |
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0027-8424 |
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PMID:8650166 |
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Equine Behaviour @ team @ |
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3798 |
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Puppe, B. |
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[Social dominance and rank relationships in domestic pigs: a critical review] |
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Journal Article |
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1996 |
Publication |
Berliner und Munchener Tierarztliche Wochenschrift |
Abbreviated Journal |
Berl Munch Tierarztl Wochenschr |
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109 |
Issue |
11-12 |
Pages |
457-464 |
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Animals; Animals, Domestic; Animals, Wild; Female; Male; Models, Psychological; *Social Behavior; *Social Dominance; Swine/*psychology |
| Abstract |
Viewing dominance as an attribute of repeated agonistic interactions between two individuals, the present paper reviews theoretical approaches towards concepts of dominance, methods of measurement, and basic principles and problems connected with social dominance in domestic pigs. Domestic pigs are able to establish social organization structures during all stages of their ontogeny. According to definition, dominance relationships occur when a consistent asymmetry of the result of dyadic agonistic interactions can be assessed. This must not necessarily be connected immediately with a better availability of resources, or a high stability of existing dominance relationships, or a functional definition of dominance. When sociometric characteristics are calculated, it seems to be appropriate to use them for different levels of a biological system (individual, individual pair, group). Investigations of social behaviour and dominance in farm animals should take into account that mechanisms of social behaviour in confined environments are often carried out in parts only. Connections of the dominance concept with other concepts of behavioural regulation should be theoretically considered and further investigated by experimental studies. |
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Forschungsbereich Physiologische Grundlagen der Tierhaltung des Forschungsinstituts fur die Biologie landwirtschaftlicher Nutztiere Dummerstorf-Rostock |
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German |
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Soziale Dominanz- und Rangbeziehungen beim Hausschwein: eine kritische Ubersicht |
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0005-9366 |
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PMID:8999780 |
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Equine Behaviour @ team @ |
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2861 |
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