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Author |
Schneider, G.; Krueger, K. |
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Title |
Third-party interventions keep social partners from exchanging affiliative interactions with others |
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Journal Article |
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Year |
2012 |
Publication |
Animal Behaviour |
Abbreviated Journal |
Anim. Behav. |
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Volume |
83 |
Issue |
2 |
Pages |
377-387 |
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Equus caballus; horse; rank; social bond; social network; third-party intervention |
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Abstract |
Third-party interventions are defined as the interruption of dyadic interactions by third animals through direct physical contact, interposing or threats. Previous studies focused on the analysis of interventions against agonistic encounters. However, there have been no evaluations of interventions against affiliative behaviours, particularly in relation to the intervening animal�s social relationships and its social and spatial position. Horses, Equus caballus, are an interesting model species, as interventions against affiliative interactions occur more frequently than against agonistic interactions. In this study, 64 feral horses displayed 67 interventions in affiliative interactions and eight interventions in agonistic interactions within the observation period. We analysed the interventions in affiliative encounters, and found that it was mainly higher-ranking females that intervened in the affiliative interactions of group mates in the stable horse harems. The intervening animals took an active part in affiliative and agonistic encounters within the group, but did not occupy particular social roles or spatial positions. They intervened in affiliative interactions in which group mates with which they had social bonds interacted with other members of the group. They targeted the nonbonded animal and approached the one with which they were socially bonded. We suggest some species use third-party interventions in affiliative interactions to prevent competition for preferred social interaction partners from escalating into more costly agonistic encounters. |
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0003-3472 |
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Equine Behaviour @ team @ |
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5492 |
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Chittka, L.; Dyer, A. |
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Title |
Cognition: Your face looks familiar |
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2012 |
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Nature |
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Nature |
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481 |
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7380 |
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154-155 |
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Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved. |
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0028-0836 |
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10.1038/481154a |
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Equine Behaviour @ team @ |
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5494 |
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Apicella, C.L.; Marlowe, F.W.; Fowler, J.H.; Christakis, N.A. |
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Title |
Social networks and cooperation in hunter-gatherers |
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Journal Article |
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Year |
2012 |
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Nature |
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481 |
Issue |
7382 |
Pages |
497-501 |
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Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved. |
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0028-0836 |
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10.1038/nature10736 |
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Equine Behaviour @ team @ |
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5577 |
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Lancet, Y.; Dukas, R. |
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Title |
Socially Influenced Behaviour and Learning in Locusts |
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Journal Article |
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Year |
2012 |
Publication |
Ethology |
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118 |
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3 |
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302-310 |
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As a part of our research on the evolution of social learning in insects, we examined socially influenced behaviour and social learning in desert locust (Schistocerca gregaria) nymphs and adults. In the nymphs, the only positive effect we documented was an increased tendency to feed while in the company of another locust than alone. The adults, on the other hand, showed significant preference for joining others (local enhancement) in both the contexts of feeding and egg laying. Neither nymphs nor adults, however, showed social learning. Our preliminary analyses pointed to locusts as a likely insect that might possess social learning. Our research, when taken together with research on phase-shifts and swarm/marching behaviour of gregarious locusts, suggests that the behavioural dynamics of gregarious locusts may make local enhancement but not social learning beneficial. The possible difference we documented between the nymphs and adults could enable us to further explore the proximate and ultimate mechanisms that underlie socially influenced behaviour. |
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Blackwell Publishing Ltd |
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1439-0310 |
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Equine Behaviour @ team @ |
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5593 |
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Dumont, B.; Rossignol, N.; Loucougaray, G.; Carrère, P.; Chadoeuf, J.; Fleurance, G.; Bonis, A.; Farruggia, A.; Gaucherand, S.; Ginane, C.; Louault, F.; Marion, B.; Mesléard, F.; Yavercovski, N. |
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Title |
When does grazing generate stable vegetation patterns in temperate pastures? |
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Year |
2012 |
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Agriculture, Ecosystems & Environment |
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153 |
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50-56 |
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Boolean process; Cattle; Patch stability; Productivity; Stocking density; Temperate pasture |
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The stability of grazing-induced spatial patterns of vegetation was analyzed at two spatial scales (25 m × 20 m areas and 1.6 m × 0.8 m grids) in pastures of contrasting productivity (maximum standing biomass: 130–800 gDM/m2). At both scales, the mosaic of grazed and ungrazed patches was modeled as a Boolean process, calculating cross-variograms to quantify the temporal stability of grazing patterns and its links with local floristic composition were tested. The scale at which stability of vegetation patterns took place in two successive years depended on pasture productivity. Inter-annual stability of large-scale patterns mainly occurred in extensively used fertile pastures grazed by cattle, and in pastures grazed by horses. Less-fertile grasslands were mainly characterized by a fine-scale stability of grazing patterns. Stable fine-scale patterns were often related to the local abundance of legumes and forbs. Stable large-scale patterns of grazing within lightly grazed productive grasslands could result in divergent local vegetation dynamics, which can be seen as an opportunity for restoring biodiversity in fertile grasslands. |
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0167-8809 |
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Equine Behaviour @ team @ |
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5595 |
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Author |
Van de Weerd, H.A.; Seaman, S.; Wheeler, K.; Goddard, P.; Mclean, B. |
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Title |
Use of artificial drinkers by unhandled semi-feral ponies |
Type |
Journal Article |
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Year |
2012 |
Publication |
Applied Animal Behaviour Science |
Abbreviated Journal |
Appl. Anim. Behav. Sci. |
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Volume |
139 |
Issue |
1-2 |
Pages |
86-95 |
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Keywords |
Semi-feral Dartmoor ponies; Drinking behaviour; Preference tests; Welfare |
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This study investigated drinking behaviour of unhandled, semi-feral Dartmoor ponies. Aspects studied were drinking behaviour, latency to drink from novel unfamiliar drinkers after transport, preferences for different types of artificial water drinkers, effects of mixing with unfamiliar ponies and group size, on drinking behaviour, and the effect of a simulated market on the latency to drink. Ponies were tested in groups of three or six animals, or as individuals in test pens that were equipped with three water drinkers: bucket, automatic drinking bowl, flowing water trough. Behaviour was recorded using time-lapse video. An individual pony drank on average 10 l per day. Ponies also drank, but at a lower rate, during the night. The latencies to drink after 4.5 h of transport showed large variation, but most ponies drank within the first hour after being transported (all groups 80.5 ± 32.94 min, mean ± SEM). In the individual choice tests, the preferred drinkers were the bucket and the flowing water trough, but not the automatic drinking bowl (drinking time 25.2 ± 4.66, 11.5 ± 4.26, 2.4 ± 2.23 min for bucket, trough and bowl respectively, mean ± SEM; paired t-tests, bowl versus other drinkers, all tests p < 0.02). A possible reason for the avoidance of the automatic bowl was the noise it made when filling. After mixing a group of three ponies with a group of three unfamiliar animals, the ponies did not express their individual drinker preferences anymore. The use of the previously preferred bucket decreased significantly and the use of the initially, non-preferred, bowl increased significantly. This was likely caused by the fact that ponies were either intentionally or accidentally obstructing drinkers in certain areas of the pen and unfamiliar ponies did not want to push past them. In the simulated market, the differences in latencies to drink between ponies in the home pen and market groups did not reach significance. No significant effect of group size (groups of three versus six ponies) on drinking behaviour was detected. The results have implications for situations where only automatic water bowls are provided, such as during pony sales at livestock markets. Preventing ponies from expressing their drinking choice, either by offering non-preferred drinkers or by mixing with unfamiliar animals, could adversely affect their welfare especially if this happens in conjunction with other stressful events such as transport and markets, and potentially weaning. |
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0168-1591 |
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Equine Behaviour @ team @ |
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5596 |
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MacLean, E.; Matthews, L.; Hare, B.; Nunn, C.; Anderson, R.; Aureli, F.; Brannon, E.; Call, J.; Drea, C.; Emery, N.; Haun, D.; Herrmann, E.; Jacobs, L.; Platt, M.; Rosati, A.; Sandel, A.; Schroepfer, K.; Seed, A.; Tan, J.; van Schaik, C.; Wobber, V. |
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How does cognition evolve? Phylogenetic comparative psychology |
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Journal Article |
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Year |
2012 |
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Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
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15 |
Issue |
2 |
Pages |
223-238 |
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Biomedizin & Life Sciences |
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Now more than ever animal studies have the potential to test hypotheses regarding how cognition evolves. Comparative psychologists have developed new techniques to probe the cognitive mechanisms underlying animal behavior, and they have become increasingly skillful at adapting methodologies to test multiple species. Meanwhile, evolutionary biologists have generated quantitative approaches to investigate the phylogenetic distribution and function of phenotypic traits, including cognition. In particular, phylogenetic methods can quantitatively (1) test whether specific cognitive abilities are correlated with life history (e.g., lifespan), morphology (e.g., brain size), or socio-ecological variables (e.g., social system), (2) measure how strongly phylogenetic relatedness predicts the distribution of cognitive skills across species, and (3) estimate the ancestral state of a given cognitive trait using measures of cognitive performance from extant species. Phylogenetic methods can also be used to guide the selection of species comparisons that offer the strongest tests of a priori predictions of cognitive evolutionary hypotheses (i.e., phylogenetic targeting). Here, we explain how an integration of comparative psychology and evolutionary biology will answer a host of questions regarding the phylogenetic distribution and history of cognitive traits, as well as the evolutionary processes that drove their evolution. |
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Springer Berlin / Heidelberg |
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1435-9448 |
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Equine Behaviour @ team @ |
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5604 |
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Author |
Kaminski, G.; Gentaz, E.; Mazens, K. |
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Development of children’s ability to detect kinship through facial resemblance |
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Journal Article |
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2012 |
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Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
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15 |
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3 |
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421-427 |
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Biomedizin & Life Sciences |
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Facial features appear to be a prominent kinship cue for ascribing relatedness among human individuals. Although there is evidence that adults can detect kinship in unrelated and unfamiliar individual’s faces, it remains to be seen whether people already possess the ability when they are young. To further understand the development of this skill, we explored children’s ability to detect parent-offspring resemblance in unrelated and unfamiliar faces. To this end, we tested approximately 140 children, aged 5–11, in two photo-matching tasks. We used a procedure that asked them to match one neonate’s face to one of three adults’ faces (Task 1), or to match one adult’s face to one of three neonate’s faces (Task 2). Our findings reveal asymmetrical performance, depending on the tasks assigned (performance of Task 2 is stronger than for Task 1), and on the sex of individuals who made up the parent-offspring pair (male parents are better matched with neonates than female parents, and boys are better matched than girls). The picture that emerges from our study is, on one hand, that the ability to detect kinship is already present at the age of five but continues to improve as one gets older, and on the other, that perception of parent-offspring facial resemblance varies according to the appraisers’ characteristics. |
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Springer Berlin / Heidelberg |
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1435-9448 |
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Equine Behaviour @ team @ |
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5605 |
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Warmuth, V.; Eriksson, A.; Bower, M.A.; Barker, G.; Barrett, E.; Hanks, B.K.; Li, S.; Lomitashvili, D.; Ochir-Goryaeva, M.; Sizonov, G.V.; Soyonov, V.; Manica, A. |
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Reconstructing the origin and spread of horse domestication in the Eurasian steppe |
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2012 |
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Proceedings of the National Academy of Sciences |
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Proc Natl Acad Sci U S A |
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Despite decades of research across multiple disciplines, the early history of horse domestication remains poorly understood. On the basis of current evidence from archaeology, mitochondrial DNA, and Y-chromosomal sequencing, a number of different domestication scenarios have been proposed, ranging from the spread of domestic horses out of a restricted primary area of domestication to the domestication of numerous distinct wild horse populations. In this paper, we reconstruct both the population genetic structure of the extinct wild progenitor of domestic horses, Equus ferus, and the origin and spread of horse domestication in the Eurasian steppes by fitting a spatially explicit stepping-stone model to genotype data from >300 horses sampled across northern Eurasia. We find strong evidence for an expansion of E. ferus out of eastern Eurasia about 160 kya, likely reflecting the colonization of Eurasia by this species. Our best-fitting scenario further suggests that horse domestication originated in the western part of the Eurasian steppe and that domestic herds were repeatedly restocked with local wild horses as they spread out of this area. By showing that horse domestication was initiated in the western Eurasian steppe and that the spread of domestic herds across Eurasia involved extensive introgression from the wild, the scenario of horse domestication proposed here unites evidence from archaeology, mitochondrial DNA, and Y-chromosomal DNA. |
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Equine Behaviour @ team @ |
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5612 |
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Author |
Krueger, Tom |
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Rinder- und Pferdebeweidung ist gut für die Natur |
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Journal Article |
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2012 |
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Junge Wissenscahften |
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93 |
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28-35 |
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Rinder und Pferde werden in den Abruzzen das ganze Jahr auf großen Weiden gehalten. Dies fördert nachweislich den Artenreichtum, verbessert die Bodenqualität und trägt durch Kohlenstoffbindung zum Klimaschutz bei. |
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0179 8529 |
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Equine Behaviour @ team @ |
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5614 |
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