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| Author | Bauer, G.B. | ||||
| Title | Research Training for Releasable Animals | Type | Journal Article | ||
| Year | 2005 | Publication | Conservation Biology | Abbreviated Journal | |
| Volume | 19 | Issue | Pages | 1779-1789 | |
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| Notes | Approved | no | |||
| Call Number | refbase @ user @ | Serial | 3507 | ||
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| Author | Bernauer, K.; Kollross, H.; Schuetz, A.; Farmer, K.; Krueger, K. | ||||
| Title | How do horses (Equus caballus) learn from observing human action? | Type | Journal Article | ||
| Year | 2020 | Publication | Animal Cognition | Abbreviated Journal | Anim. Cogn. |
| Volume | 23 | Issue | Pages | 1-9 | |
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| Abstract |
A previous study demonstrated that horses can learn socially from observing humans, but could not draw any conclusions about the social learning mechanisms. Here we develop this by showing horses four different human action sequences as demonstrations of how to press a button to open a feed box. We tested 68 horses aged between 3 and 12 years. 63 horses passed the habituation phase and were assigned either to the group Hand Demo (N = 13) for which a kneeling person used a hand to press the button, Head Demo (N = 13) for which a kneeling person used the head, Mixed Demo (N = 12) for which a squatting person used both head and hand, Foot Demo (N = 12) in which a standing person used a foot, or No Demo (N = 13) in which horses did not receive a demonstration. 44 horses reached the learning criterion of opening the feeder twenty times consecutively, 40 of these were 75% of the Demo group horses and four horses were 31% of the No Demo group horses. Horses not reaching the learning criterion approached the human experimenters more often than those who did. Significantly more horses used their head to press the button no matter which demonstration they received. However, in the Foot Demo group four horses consistently preferred to use a hoof and two switched between hoof and head use. After the Mixed Demo the horses' actions were more diverse. The results indicate that only a few horses copy behaviours when learning socially from humans. A few may learn through observational conditioning, as some appeared to adapt to demonstrated actions in the course of reaching the learning criterion. Most horses learn socially through enhancement, using humans to learn where, and which aspect of a mechanism has to be manipulated, and by applying individual trial and error learning to reach their goal. | ||||
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| ISSN | 1435-9456 | ISBN | Medium | ||
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| Notes | Approved | no | |||
| Call Number | Equine Behaviour @ team @ Bernauer2019 | Serial | 6590 | ||
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| Author | Puppe, B.; Langbein, J.; Bauer, J.; Hoy, S. | ||||
| Title | A comparative view on social hierarchy formation at different stages of pig production using sociometric measures | Type | Journal Article | ||
| Year | 2008 | Publication | Livestock Science | Abbreviated Journal | |
| Volume | 113 | Issue | 2-3 | Pages | 155-162 |
| Keywords | Pig; Dominance; Sociometric measures; Social hierarchy; Ontogeny | ||||
| Abstract |
A standardised and comprehensive approach to describe dominance relationships in gregarious farm animals quantitatively was recently developed, incorporating a combination of appropriate sociometric measures. The present study applied this approach to a comparative analysis of the social hierarchies within 57 groups of domestic pigs at different age/production stages with a total of 496 animals. Unacquainted pigs were grouped to three age categories which correspond to the typical production stages: weaned pigs (PIG28, 12 groups), growing pigs (PIG80, 16 groups), and reproductive sows (SOW, 29 groups). Based on observed agonistic interactions, sociometric values were calculated both at the dyadic and at the group level and may be considered as preliminary reference values for further studies. As indicated by the respective values of the Kendall index (PIG28: 0.66, tested as significant in 69.0% of the observed groups; PIG80: 0.71, 87.5%; SOW: 0.61, 69.0%), and the improved Landau index (PIG28: 0.70, 75.0%; PIG80: 0.72, 93.7%; SOW: 0.71, 72.4%), a social organisation towards a quasi-linear social hierarchy was predominantly developed throughout all age/production categories. However, compared to weaned and growing pigs, sows were characterised by significant differences concerning establishment (fewer agonistic interactions) and kind (more unknown dyads, fewer two-way and significant dyads, higher directional consistency index) of their social hierarchy. It seems that sows have effectively adapted their agonistic behaviour towards pen-mates to regulate social dominance relationships, whereas younger pigs frequently display agonistic interactions also to gain additional experience on social cues (e.g. the fighting ability of an opponent). Hence, it is concluded that the effective experience of socialisation during sensitive periods may increase the social skills of pigs which in turn can improve their welfare and health, e.g. by adjusted aggressive behaviour. The consideration of comparable and standardised sociometric measures in livestock breeding may help to improve husbandry conditions. | ||||
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| Notes | Approved | no | |||
| Call Number | Serial | 2139 | |||
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| Author | Geisbauer, G.; Griebel, U.; Schmid, A.; Timney, B | ||||
| Title | Brightness discrimination and neutral point | Type | Journal Article | ||
| Year | 2004 | Publication | Canadian Journal of Zoology | Abbreviated Journal | Can. J. Zool |
| Volume | 82 | Issue | 4 | Pages | 660-670 |
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Abstract: Equine brightness discrimination ability and color discrimination were measured using a two-choice discrimination task. Two Haflinger horses (Equus caballus L., 1758) were trained to discriminate 30 different shades of grey varying from low to high relative brightness. Their ability to distinguish shades of grey was poor, with calculated Weber fractions of 0.42 and 0.45. In addition, a “neutral point” test to determine the dimensionality of color vision was carried out. Three hues of blue-green were tested versus a range of grey targets with brightnesses similar to those of the blue-green targets. A neutral point was found at about 480 nm. Thus, we can conclude that horses possess dichromatic color vision. |
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| Notes | Approved | no | |||
| Call Number | Equine Behaviour @ team @ | Serial | 3649 | ||
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| Author | Flack, J.C.; Girvan, M.; de Waal, F.B.M.; Krakauer, D.C. | ||||
| Title | Policing stabilizes construction of social niches in primates | Type | Journal Article | ||
| Year | 2006 | Publication | Nature | Abbreviated Journal | Nature |
| Volume | 439 | Issue | 7075 | Pages | 426-429 |
| Keywords | Animals; Conflict (Psychology); Female; Macaca nemestrina/*physiology/*psychology; Male; Models, Biological; *Social Behavior | ||||
| Abstract |
All organisms interact with their environment, and in doing so shape it, modifying resource availability. Termed niche construction, this process has been studied primarily at the ecological level with an emphasis on the consequences of construction across generations. We focus on the behavioural process of construction within a single generation, identifying the role a robustness mechanism--conflict management--has in promoting interactions that build social resource networks or social niches. Using 'knockout' experiments on a large, captive group of pigtailed macaques (Macaca nemestrina), we show that a policing function, performed infrequently by a small subset of individuals, significantly contributes to maintaining stable resource networks in the face of chronic perturbations that arise through conflict. When policing is absent, social niches destabilize, with group members building smaller, less diverse, and less integrated grooming, play, proximity and contact-sitting networks. Instability is quantified in terms of reduced mean degree, increased clustering, reduced reach, and increased assortativity. Policing not only controls conflict, we find it significantly influences the structure of networks that constitute essential social resources in gregarious primate societies. The structure of such networks plays a critical role in infant survivorship, emergence and spread of cooperative behaviour, social learning and cultural traditions. | ||||
| Address | Santa Fe Institute, Santa Fe, New Mexico 87501, USA. jflack@santafe.edu | ||||
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| Language | English | Summary Language | Original Title | ||
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| ISSN | 1476-4687 | ISBN | Medium | ||
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| Notes | PMID:16437106 | Approved | no | ||
| Call Number | refbase @ user @ | Serial | 298 | ||
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| Author | Weber-Mzell, D.; Kotanko, P.; Hauer, A.C.; Goriup, U.; Haas, J.; Lanner, N.; Erwa, W.; Ahmaida, I.A.; Haitchi-Petnehazy, S.; Stenzel, M.; Lanzer, G.; Deutsch, J. | ||||
| Title | Gender, age and seasonal effects on IgA deficiency: a study of 7293 Caucasians | Type | Journal Article | ||
| Year | 2004 | Publication | European Journal of Clinical Investigation | Abbreviated Journal | |
| Volume | 34 | Issue | 3 | Pages | 224-228 |
| Keywords | Age- and gender-related variability; immunoglobulin A; seasonal variability; serum IgA deficiency | ||||
| Abstract |
Background The frequency of serum IgA deficiency (SIgAD) differs between populations. We examined the prevalence of SIgAD in healthy Caucasians. Materials and methods Serum immunoglobulin A (SIgA) was measured in 7293 volunteers (2264 women, 5029 men) aged 30 ± 14·2 years (mean ± SD; range: 12–66). Serum immunoglobulin A and subnormal SIgA levels were defined by a SIgA level < 0·07 g L-1, and between 0·07 and 0·7 g L-1, respectively. Means were compared by analysis of variance (anova) and analysis of covariance (ancova); frequencies by the χ2 test. Results Fifteen subjects (0·21%; one woman, 14 men) had SIgAD. Subnormal SIgA levels were found in 155 persons (2·13%): 21 females (0·93% of the females) and 134 males (2·66% of the males; difference: 1·74%; 95% CI: 1·12–2·33%; P < 0·001). Males were more likely to have subnormal SIgA levels or SIgAD (odds ratio 3·09, 95% CI: 1·97–4·85). The prevalence of SIgAD and subnormal SIgA was lowest in winter (χ2 = 14·8; P = 0·002; 3 d.f.; and χ2 = 43·2; P < 0·001; 3 d.f., respectively). Serum immunoglobulin A concentrations were significantly higher during winter. Serum immunoglobulin A levels increased with age on average by 0·2 ± 0·06 g L-1 per decade of life (P < 0·001). Taking into account the influence of age, SIgA concentration was lower in females as compared with males. Conclusion The prevalence of SIgAD and subnormal SIgA levels is increased in males. There exists a significant influence of gender, age and seasons on SIgA levels. | ||||
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| Publisher | Blackwell Science Ltd | Place of Publication | Editor | ||
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| ISSN | 1365-2362 | ISBN | Medium | ||
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| Notes | Approved | no | |||
| Call Number | Equine Behaviour @ team @ | Serial | 6127 | ||
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| Author | Knubben,; J. M. Knubben; Gygax,; L. Gygax; Auer,; J. Auer; Fürst,; A. Fürst; Stauffacher,; Dr. M. Stauffacher | ||||
| Title | Häufigkeiten von Erkrankungen und Verletzungen in der Schweizer Pferdepopulation | Type | Journal Article | ||
| Year | 2008 | Publication | Schweizer Archiv für Tierheilkunde | Abbreviated Journal | |
| Volume | 150 | Issue | 8 | Pages | 399-408 |
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| Abstract |
Bei einer für die Schweiz repräsentativ und zufällig ausgewählten Stichprobe von 2912 Pferden und Ponys wurden mittels Fragebogen Daten zum aktuellen Gesundheitszustand und zum Auftreten von Erkrankungen und Verletzungen während der vergangenen 12 Monate erfasst. 718 Pferde (24.7%) wurden im Erfassungszeitraum wegen 897 gesundheitlichen Problemen einem Tierarzt vorgestellt. Orthopädische und traumatische Fälle machten den grössten Anteil aus (41.5%), gefolgt von Erkrankungen des Gastrointestinal- (27.1%) und des Respirationstrakts (14.0%). Die Hälfte der Lahmheiten entstand als unmittelbare Folge einer Verletzung. Die Verletzungen waren assoziiert mit Weidegang/Auslauf (38.1%), Schläge/Bissen durch Artgenossen (21.6%), Stall (7.8%), Gelände (13.4%), Training (3.5%), Wettkampf (3.5%), Transport (3.0%) oder mit anderen Umständen (9.1%). In 26.5% der Kolikfälle wurde im Monat vor der Erkrankung Futterumstellung vorgenommen. Bei den Atmungserkrankungen wurde in 13.8% die gleiche Krankheit auch bei anderen Pferden im Stall diagnostiziert. Bei 8.1% aller Fälle erfolgte eine Operation, 6.7% waren mit einem mehrtägigem Klinikaufenthalt verbunden. Bei 25.6% aller tiermedizinisch diagnostizierten Fälle wurden ergänzend oder ausschliesslich komplementärmedizinische Therapiemethoden eingesetzt. | ||||
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| Notes | Approved | no | |||
| Call Number | Equine Behaviour @ team @ | Serial | 5761 | ||
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| Author | Flack, J.C.; de Waal, F.B.M.; Krakauer, D.C. | ||||
| Title | Social structure, robustness, and policing cost in a cognitively sophisticated species | Type | Journal Article | ||
| Year | 2005 | Publication | The American Naturalist | Abbreviated Journal | Am Nat |
| Volume | 165 | Issue | 5 | Pages | E126-139 |
| Keywords | Animals; *Behavior, Animal; Cognition; Conflict (Psychology); Female; Macaca nemestrina/*physiology; Male; Models, Biological; *Social Behavior | ||||
| Abstract |
Conflict management is one of the primary requirements for social complexity. Of the many forms of conflict management, one of the rarest and most interesting is third-party policing, or intervening impartially to control conflict. Third-party policing should be hard to evolve because policers personally pay a cost for intervening, while the benefits are diffused over the whole group. In this study we investigate the incidence and costs of policing in a primate society. We report quantitative evidence of non-kin policing in the nonhuman primate, the pigtailed macaque. We find that policing is effective at reducing the intensity of or terminating conflict when performed by the most powerful individuals. We define a measure, social power consensus, that predicts effective low-cost interventions by powerful individuals and ineffective, relatively costly interventions by low-power individuals. Finally, we develop a simple probabilistic model to explore whether the degree to which policing can effectively reduce the societal cost of conflict is dependent on variance in the distribution of power. Our data and simple model suggest that third-party policing effectiveness and cost are dependent on power structure and might emerge only in societies with high variance in power. | ||||
| Address | Santa Fe Institute, Santa Fe, New Mexico 87501, USA. jflack@santafe.edu | ||||
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| Language | English | Summary Language | Original Title | ||
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| ISSN | 1537-5323 | ISBN | Medium | ||
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| Notes | PMID:15795848 | Approved | no | ||
| Call Number | refbase @ user @ | Serial | 168 | ||
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| Author | Flack, J.C.; Krakauer, D.C.; de Waal, F.B.M. | ||||
| Title | Robustness mechanisms in primate societies: a perturbation study | Type | Journal Article | ||
| Year | 2005 | Publication | Proceedings. Biological sciences / The Royal Society | Abbreviated Journal | Proc Biol Sci |
| Volume | 272 | Issue | 1568 | Pages | 1091-1099 |
| Keywords | Aggression/physiology; Animals; *Conflict (Psychology); Female; *Hierarchy, Social; Macaca nemestrina/*physiology; Male; *Models, Theoretical; Observation; *Social Behavior | ||||
| Abstract |
Conflict management mechanisms have a direct, critical effect on system robustness because they mitigate conflict intensity and help repair damaged relationships. However, robustness mechanisms can also have indirect effects on system integrity by facilitating interactions among components. We explore the indirect role that conflict management mechanisms play in the maintenance of social system robustness, using a perturbation technique to 'knockout' components responsible for effective conflict management. We explore the effects of knockout on pigtailed macaque (Macaca nemestrina) social organization, using a captive group of 84 individuals. This system is ideal in addressing this question because there is heterogeneity in performance of conflict management. Consequently, conflict managers can be easily removed without disrupting other control structures. We find that powerful conflict managers are essential in maintaining social order for the benefit of all members of society. We show that knockout of components responsible for conflict management results in system destabilization by significantly increasing mean levels of conflict and aggression, decreasing socio-positive interaction and decreasing the operation of repair mechanisms. | ||||
| Address | Santa Fe Institute, NM 87501, USA. jflack@santafe.edu | ||||
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| ISSN | 0962-8452 | ISBN | Medium | ||
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| Notes | PMID:16024369 | Approved | no | ||
| Call Number | refbase @ user @ | Serial | 165 | ||
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| Author | Brauer, J.; Kaminski, J.; Riedel, J.; Call, J.; Tomasello, M. | ||||
| Title | Making inferences about the location of hidden food: social dog, causal ape | Type | Journal Article | ||
| Year | 2006 | Publication | Journal of comparative psychology | Abbreviated Journal | J Comp Psychol |
| Volume | 120 | Issue | 1 | Pages | 38-47 |
| Keywords | Animals; Communication; Cues; Dogs; Exploratory Behavior; *Feeding Behavior; Female; *Food; Male; Pan paniscus; Pan troglodytes; *Visual Perception | ||||
| Abstract |
Domestic dogs (Canis familiaris) and great apes from the genus Pan were tested on a series of object choice tasks. In each task, the location of hidden food was indicated for subjects by some kind of communicative, behavioral, or physical cue. On the basis of differences in the ecologies of these 2 genera, as well as on previous research, the authors hypothesized that dogs should be especially skillful in using human communicative cues such as the pointing gesture, whereas apes should be especially skillful in using physical, causal cues such as food in a cup making noise when it is shaken. The overall pattern of performance by the 2 genera strongly supported this social-dog, causal-ape hypothesis. This result is discussed in terms of apes' adaptations for complex, extractive foraging and dogs' adaptations, during the domestication process, for cooperative communication with humans. | ||||
| Address | Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany. jbraeuer@eva.mpg.de | ||||
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| Publisher | Place of Publication | Washington, D.C. : 1983 | Editor | ||
| Language | English | Summary Language | Original Title | ||
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| ISSN | 0735-7036 | ISBN | Medium | ||
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| Notes | PMID:16551163 | Approved | yes | ||
| Call Number | refbase @ user @ | Serial | 597 | ||
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