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Author Lafferty, K.D. doi  openurl
  Title Look what the cat dragged in: do parasites contribute to human cultural diversity? Type Journal Article
  Year 2005 Publication Behavioural Processes Abbreviated Journal Behav. Process.  
  Volume 68 Issue 3 Pages 279-282  
  Keywords Adaptation, Physiological/physiology; Adaptation, Psychological/physiology; Animals; Behavior/physiology; *Behavior Control; Cats/*parasitology; Cultural Diversity; Host-Parasite Relations; Humans; Personality/*physiology; Toxoplasma/*physiology; Toxoplasmosis/parasitology/*psychology  
  Abstract  
  Address Western Ecological Research Center, United States Geological Survey, c/o Marine Science Institute, University of California, Santa Barbara, CA 93106, USA. lafferty@lifesci.ucsb.edu  
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  ISSN 0376-6357 ISBN Medium  
  Area Expedition Conference  
  Notes PMID:15792708 Approved no  
  Call Number Equine Behaviour @ team @ Serial 4148  
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Author Friedrich, A.M.; Zentall, T.R. doi  openurl
  Title Pigeons shift their preference toward locations of food that take more effort to obtain Type Journal Article
  Year 2004 Publication Behavioural processes Abbreviated Journal Behav. Process.  
  Volume 67 Issue 3 Pages 405-415  
  Keywords Animals; *Behavior, Animal; *Choice Behavior; Columbidae; *Exertion; *Feeding Behavior; Reward  
  Abstract Although animals typically prefer to exert less effort rather than more effort to obtain food, the present research shows that requiring greater effort to obtain food at a particular location appears to increase the value of that location. In Experiment 1, pigeons' initial preference for one feeder was significantly reduced by requiring 1 peck to obtain food from that feeder and requiring 30 pecks to obtain food from the other feeder. In Experiment 2, a similar decrease in preference was not found when pigeons received reinforcement from both feeders independently of the amount of effort required. These results are consistent with the within-trial contrast effect proposed by in which the relative hedonic value of a reward depends on the state of the animal immediately prior to the reward. The greater the improvement from that prior state the greater the value of the reinforcer.  
  Address Department of Psychology, University of Kentucky, Lexington, KY 40506-0044, USA  
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  ISSN 0376-6357 ISBN Medium  
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  Notes PMID:15518990 Approved no  
  Call Number refbase @ user @ Serial 227  
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Author Friedrich, A.M.; Clement, T.S.; Zentall, T.R. doi  openurl
  Title Functional equivalence in pigeons involving a four-member class Type Journal Article
  Year 2004 Publication Behavioural processes Abbreviated Journal Behav. Process.  
  Volume 67 Issue 3 Pages 395-403  
  Keywords Animals; *Association Learning; *Behavior, Animal; *Cognition; Columbidae; *Concept Formation  
  Abstract Research suggests that animals are capable of forming functional equivalence relations or stimulus classes of the kind usually demonstrated by humans (e.g., the class defined by an object and the word for that object). In pigeons, such functional equivalences are typically established using many-to-one matching-to-sample in which two samples are associated with one comparison stimulus and two different samples are associated with the other. Evidence for the establishment of functional equivalences between samples associated with the same comparison comes from transfer tests. In Experiment 1, we found that pigeons can form a single class consisting of four members (many-to-one matching) when the alternative class has only one member (one-to-one matching). In Experiment 2, we ruled out the possibility that the pigeons acquired the hybrid one-to-one/many-to-one task by developing a single-code/default coding strategy as earlier research suggested that it might. Thus, pigeons can develop a functional class consisting of as many as four members, with the alternative class consisting of a single member.  
  Address Department of Psychology, University of Kentucky, Lexington, KY 40506-0044, USA  
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  ISSN 0376-6357 ISBN Medium  
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  Notes PMID:15518989 Approved no  
  Call Number refbase @ user @ Serial 228  
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Author Sutton J.E.; Roberts W.A. doi  openurl
  Title Do pigeons show incidental timing? Some experiments and a suggested hierarchical framework for the study of attention in animal cognition Type Journal Article
  Year 1998 Publication Behavioural Processes Abbreviated Journal Behav. Process.  
  Volume 44 Issue Pages 263-275  
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  Call Number refbase @ user @ Serial 3463  
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Author Beaugrand, J.P doi  openurl
  Title Relative importance of initial individual differences, agonistic experience, and assessment accuracy during hierarchy formation: a simulation study Type Journal Article
  Year 1997 Publication Behavioural Processes Abbreviated Journal Behav. Process.  
  Volume 41 Issue Pages 177-192  
  Keywords Dominance; Hierarchy formation; RHP; Agonistic experience; Assessment; Self-organization; Simulation  
  Abstract This simulation study explores some conditions leading to transitivity within dominance orders. Combinations of three parameters were varied to study their consequences upon hierarchy formation and upon the degree of linearity of resultant structures. The factors studied were: (1) the importance of initial resource holding potentials (RHPs); (2) changes brought in RHPs by successive victories and defeats; and (3) accuracy of RHP assessment made by opponents. Results show that initial differences in RHP always lead to perfectly transitive chains whose rank order reflects the importance of initial differences. Even when simulated animals make important errors while assessing each other during round robin tournaments, emerging dominance structures are perfectly linear and ranks obtained in the structure are highly correlated with initial values in RHPs. Moreover, accumulated experiences of victory and/or defeat alone always lead to perfectly linear hierarchies. Their combination with initial individual differences in RHP led to the same conclusion. Even when assessment was far from being perfect, not only perfect chains were formed but initial values in RHPs significantly influenced rank order when the contribution of victory and defeat to RHP was relatively unimportant. The higher the importance of victory and defeat to RHP as compared to that of initial RHP values, the lower was the correlation between initial RHP values and the ranks order reached by individuals in the resultant hierarchies. In general also, the lower the variation within initial RHPs, the lower was the correlation between initial RHPs and ranks in the hierarchy. At a given level of initial RHP dispersion, increasing the contribution of victory and defeat to RHP diminished the correlation between initial RHP values and obtained ranks. In addition, inaccurate assessment reduced the overall correlation, especially when dispersion of initial RHP values was low and the contribution of victory and defeat relatively unimportant. These results shed some light on the controversy about the respective roles of initial individual attributes and that of patterns of resolution in the formation of animal hierarchies. We present the emergence of social order within closed systems as those simulated here as a case of self-organization.  
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  Call Number Equine Behaviour @ team @ Serial 4290  
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Author Desire L.; Boissy A.; Veissier I. doi  openurl
  Title Emotions in farm animals: – a new approach to animal welfare in applied ethology Type Journal Article
  Year 2002 Publication Behavioural Processes Abbreviated Journal Behav. Process.  
  Volume 60 Issue Pages 165-180  
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  Call Number refbase @ user @ Serial 3482  
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Author Abeyesinghe, S.M.; Nicol, C.J.; Wathes. C.M.; Randall, J.M. doi  openurl
  Title Development of a raceway method to assess aversion of domestic fowl to concurrent stressors Type Journal Article
  Year 2001 Publication Behavioural Processes Abbreviated Journal Behav. Process.  
  Volume 56 Issue 3 Pages 175-194  
  Keywords previous termConcurrent stressors; Aversion; Domestic fowlnext term; Transport; Vibration; Hyperthermia  
  Abstract The requirement for assessing the effects of stressor combinations in improving the welfare of animals has not been widely recognised. Knowledge of the effects of concurrent stressors is needed to improve environments such as transport, where animals are presented with many simultaneous challenges. However, no method for measuring the effects of different stressors with a common unit is currently available. A locomotor passive avoidance method was developed as a common currency measure of the aversion of domestic fowl to concurrent stressors, using vibrational and thermal stressors as an exemplar. Juvenile fowl, fasted overnight, were trained to run a raceway into a goal-box for small food rewards (FR1). When running consistently, the reinforcement schedule was superimposed with a FR5 treatment schedule (60 min confinement in the goal-box with either a control of no other stressors [N] or concurrent vibration and thermal stressors [VT]). Subsequent latency to return to the goal-box was recorded as a measure of aversion. The factors affecting bird response were addressed in a series of experiments to optimise the method and clarify interpretation of results. Pre-feeding (20% ration 2 h prior to testing) did not affect response, but increasing the number of treatment presentations facilitated learning and increased method sensitivity. Treatment responses were consistent across experiments; overall VT was avoided (P<0.001), but N was not. However, there was large individual variation in response to VT. A final experiment indicated that, given a visual discriminatory cue, birds were capable of learning the required association between entering the goal-box and receiving the treatment, suggesting that the delay responses were due to aversion rather than the immediate impact of treatment on ability to respond. Further work is required to test the singular stressors, but the method retains common currency potential for assessing aversion to multiple stressors.  
  Address Bio-Engineering Division, Silsoe Research Institute, Wrest Park, Silsoe, MK45 4HS, Bedford, UK  
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  ISSN 0376-6357 ISBN Medium  
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  Notes PMID:11738510 Approved no  
  Call Number refbase @ user @ Serial 85  
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Author Mercado E.; Killebrew D.A.; Pack A.A.; Macha I.V.B.; Herman L.M. doi  openurl
  Title Generalization of 'same-different' classification abilities in bottlenosed dolphins Type Journal Article
  Year 2000 Publication Behavioural Processes Abbreviated Journal Behav. Process.  
  Volume 50 Issue Pages 79-94  
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  Call Number refbase @ user @ Serial 3479  
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Author Krueger, K.; Schneider, G.; Flauger, B.; Heinze, J. doi  openurl
  Title Context-dependent third-party intervention in agonistic encounters of male Przewalski horses Type Journal Article
  Year 2015 Publication Behavioural Processes Abbreviated Journal Behav. Process.  
  Volume 121 Issue Pages 54-62  
  Keywords Equus ferus przewalskii; Group conflict; Rank orders; Social bonds; Social control; Third-party intervention  
  Abstract Abstract One mechanism to resolve conflict among group members is third party intervention, for which several functions, such as kin protection, alliance formation, and the promotion of group cohesion have been proposed. Still, empirical research on the function of intervention behaviour is rare. We studied 40 cases of intervention behaviour in a field study on 13 semi-wild bachelor horses (Equus ferus przewalskii) in (a) standard social situations, and (b) when new horses joined the group (i.e. introductions). Only interventions in agonistic encounters were analysed. Eight of 13 animals directed intervention behaviour toward threatening animal in agonistic encounters of group members. One stallion was particularly active. The stallions did not intervene to support former group mates or kin and interventions were not reciprocated. In introduction situations and in standard social situations, the interveners supported animals which were lower in rank, but targeted, threatening animals of comparable social rank. After introductions, stallions received more affiliative behaviour from animals they supported and thus appeared to intervene for alliance formation. In standard social situations, interveners did not receive more affiliative behaviour from animals they supported and may primarily have intervened to promote group cohesion and to reduce social disruption within the group.  
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  Notes Approved no  
  Call Number Equine Behaviour @ team @ Serial 5925  
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Author Hanggi, E.B.; Ingersoll, J.F. doi  openurl
  Title Stimulus discrimination by horses under scotopic conditions Type Journal Article
  Year 2009 Publication Behavioural Processes Abbreviated Journal Behav. Process.  
  Volume 82 Issue 1 Pages 45-50  
  Keywords Discrimination learning; Equine; Horse; Night vision; Scotopic vision  
  Abstract Scotopic vision in horses (Equus caballus) was investigated using behavioral measurements for the first time. Four horses were tested for the ability to make simple visual discriminations of geometric figures (circles and triangles) under various brightness levels within an enclosed building. Measurements of brightness ranging from 10.37 to 24.12 magnitudes per square arcsecond (mag/arcsec2; in candelas per square meter--7.70 to 2.43E-05 cd/m2) were taken using a Sky Quality Meter. These values approximated outdoor conditions ranging from twilight in open country to a dark moonless night in dense forest. The horses were able to solve the discrimination problems in all brightness settings up to 23.77 mag/arcsec2 (3.35E-05 cd/m2). Moreover, they easily navigated their way around obstacles located within the testing area in extremely dim light (>23.50 mag/arcsec2; 4.30E-05 cd/m2), which were in conditions too dark for the human experimenters to see. These findings support physiological data that reveal a rod-dominated visual system as well as observations of equine activity at night.  
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  Notes Approved no  
  Call Number Equine Behaviour @ team @ Serial 5051  
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