| Records |
| Author |
Boyd, L.; Keiper, R. |
| Title |
Behavioural ecology of feral horses |
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Book Chapter |
| Year |
2005 |
Publication |
The domestic horse: the origins, development, and management of its behaviour |
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Cambridge University Press |
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Cambridge |
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Mills, D. S.; McDonnell S. M. |
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Equine Behaviour @ team @ |
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5439 |
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| Author |
Kruska, D.C.T. |
| Title |
On the evolutionary significance of encephalization in some eutherian mammals: effects of adaptive radiation, domestication, and feralization |
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Journal Article |
| Year |
2005 |
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Brain Behav Evol |
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65 |
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Equine Behaviour @ team @ Kruska2005 |
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6235 |
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| Author |
Saunders, F.C.; McElligott, A.G.; Safi, K.; Hayden, T.J. |
| Title |
Mating tactics of male feral goats (Capra hircus): risks and benefits |
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Journal Article |
| Year |
2005 |
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Acta Ethol |
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8 |
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Equine Behaviour @ team @ Saunders2005 |
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6252 |
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| Author |
Shi, J.; Dunbar, R.I.M.; Buckland, D.; Miller, D. |
| Title |
Dynamics of grouping patterns and social segregation in feral goats (Capra hircus) on the Isle of Rum, NW Scotland |
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Journal Article |
| Year |
2005 |
Publication |
Mammalia |
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69 |
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Equine Behaviour @ team @ Shi2005 |
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6257 |
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Pérez-Barbería, F.J.; Gordon, I.J. |
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Gregariousness increases brain size in ungulates |
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Journal Article |
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2005 |
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Oecologia |
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145 |
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Equine Behaviour @ team @ Pérez-Barbería2005 |
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6258 |
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| Author |
Bates, D. |
| Title |
Fitting linear mixed models in R |
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Journal Article |
| Year |
2005 |
Publication |
R News |
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5 |
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Equine Behaviour @ team @ Bates2005 |
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6293 |
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| Author |
Burch, J.W.; Layne, G.A.; Follmann, E.H.; Rexstad, E.A. |
| Title |
Evaluation of Wolf Density Estimation from Radiotelemetry Data |
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Journal Article |
| Year |
2005 |
Publication |
Wildl Soc Bull |
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33 |
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Equine Behaviour @ team @ Burch2005 |
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6477 |
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| Author |
Zentall, T.R. |
| Title |
Selective and divided attention in animals |
Type |
Journal Article |
| Year |
2005 |
Publication |
Behavioural processes |
Abbreviated Journal |
Behav. Process. |
| Volume |
69 |
Issue |
1 |
Pages |
1-15 |
| Keywords |
Animals; *Attention; *Behavior, Animal; *Discrimination (Psychology); *Field Dependence-Independence; *Psychological Theory |
| Abstract |
This article reviews some of the research on attentional processes in animals. In the traditional approach to selective attention, it is proposed that in addition to specific response attachments, animals also learn something about the dimension along which the stimuli fall (e.g., hue, brightness, or line orientation). More recently, there has been an attempt to find animal analogs to methodologies originally applied to research with humans. One line of research has been directed to the question of whether animals can locate a target among distracters faster if they are prepared for the presentation of the target (search image and priming). In the study of search image, the target is typically a food item and the cue consists of previous trials on which the same target is presented. In research on priming effects, the cue is typically different from the target but is a good predictor of its occurrence. The study of preattentive processes shows that perceptually, certain stimuli stand out from distracters better than others, depending not only on characteristics of the target relative to the distracters, but also on relations among the distracters. Research on divided attention is examined with the goal of determining whether an animal can process two elements of a compound sample with the same efficiency as one. Taken together, the reviewed research indicates that animals are capable of centrally (not just peripherally) attending to selective aspects of a stimulus display. |
| Address |
Department of Psychology, University of Kentucky, 202B Kastle Hall, Lexington, KY 40506-0044, USA. Zentall@uky.edu |
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English |
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0376-6357 |
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PMID:15795066 |
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no |
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refbase @ user @ |
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224 |
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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 |
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English |
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1435-9448 |
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PMID:15164259 |
Approved |
no |
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refbase @ user @ |
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687 |
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| Author |
Abeyesinghe, S.M.; Nicol, C.J.; Hartnell, S.J.; Wathes, C.M. |
| Title |
Can domestic fowl, Gallus gallus domesticus, show self-control? |
Type |
Journal Article |
| Year |
2005 |
Publication |
Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
| Volume |
70 |
Issue |
1 |
Pages |
1-11 |
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| Abstract |
An important aspect of cognition is whether animals live exclusively in the present or can anticipate the future. Defined as self-control, the ability to choose a large, remote reinforcer over a small, proximate reinforcer available at the same frequency has been examined in a number of species, often proving difficult to demonstrate. We investigated self-control for food in domestic fowl using a standard two-key operant task and an equivalent two-choice return maze (TCRM) task. When hens chose between a 2-s delay to a 3-s feed access (impulsive) and a 6-s delay to a 7-s feed access (self-control), they appeared unable to discriminate in the TCRM but were impulsive in the operant task. We explored reasons for not choosing self-control in the operant task, first by examining the relation between feed access time and actual feed intake. A second operant experiment examined whether failure to show self-control could be attributed to an inability to combine the delay and access (quantity) reward information associated with choices to reach overall predictions of value. New hens chose between a 2-s delay to a 3-s feed access (impulsive) and either a 22-s delay to a 22-s feed access (standard self-control) or a 6-s delay to a 22-s feed access (jackpot self-control). While hens were impulsive in the standard condition, they showed significant and pronounced self-control in the jackpot condition, eliminating the possibility of an absolute cognitive constraint. Impulsive behaviour can instead be explained by temporal discounting: perceived depreciation of reward value as a function of the uncertainty associated with delay. Implications for welfare are discussed. |
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Equine Behaviour @ team @ |
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2897 |
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