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Rochais, C.; HENRY, S.; Sankey, C.; Nassur, F.; Gorecka-Bruzda, A.; HAUSBERGER, M. |
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Visual attention, an indicator of human-animal relationships? A study of domestic horses (Equus caballus) |
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2014 |
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Frontiers in Psychology |
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5 |
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BACKGROUND: As visual attention is an intrinsic part of social relationships, and because relationships are built on a succession of interactions, their establishment involves learning and attention. The emotional, rewarding or punishing, content can modulate selective attention. In horses, the use of positive/negative reinforcement during training determines short and long-term human-horse relationships. In a recent study in horses, where either food or withers' grooming were used as a reward, it appeared that only the food-rewarded horses learned the task and show better relationship with humans. In the present study, we hypothesized that this differential effect of grooming/food rewards on learning performances could be due to attentional processes. Monitoring, gazes and behaviors directed towards the trainer revealed that the use of a food reward (FR) as positive reinforcement increased horses' selective attention towards their trainer. Conversely, horses trained with grooming reward (GR) expressed more inattentive responses and did not show a decrease of “agitated” behavior. However, individual plotting of attention vs. rate of learning performances revealed a complex pattern. Thus, while all FR horses showed a “window” of attention related to faster learning performances, GR horses' pattern followed an almost normal curve where the extreme animals (i.e., highest and lowest attention) had the slowest learning performances. On the other hand, learning was influenced by attention: at the end of training, the more attentive horses had also better learning performances. This study, based on horses, contributes to the general debate on the place of attentional processes at the interface of emotion and cognition and opens new lines of thought about individual sensitivities (only individuals can tell what an appropriate reward is), attentional processes and learning. |
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1664-1078 |
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Equine Behaviour @ team @ |
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5909 |
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Author |
Joffe, T.H.; Dunbar, R.I. |
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Visual and socio-cognitive information processing in primate brain evolution |
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Journal Article |
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1997 |
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Proceedings. Biological Sciences / The Royal Society |
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Proc Biol Sci |
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264 |
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1386 |
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1303-1307 |
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Animals; Brain/anatomy & histology/*physiology; Cognition/physiology; *Evolution; Geniculate Bodies/anatomy & histology/physiology; Humans; Mental Processes/physiology; Neocortex/physiology; Primates/anatomy & histology/*physiology/*psychology; *Social Behavior; Visual Cortex/anatomy & histology/physiology |
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Social group size has been shown to correlate with neocortex size in primates. Here we use comparative analyses to show that social group size is independently correlated with the size of non-V1 neocortical areas, but not with other more proximate components of the visual system or with brain systems associated with emotional cueing (e.g. the amygdala). We argue that visual brain components serve as a social information 'input device' for socio-visual stimuli such as facial expressions, bodily gestures and visual status markers, while the non-visual neocortex serves as a 'processing device' whereby these social cues are encoded, interpreted and associated with stored information. However, the second appears to have greater overall importance because the size of the V1 visual area appears to reach an asymptotic size beyond which visual acuity and pattern recognition may not improve significantly. This is especially true of the great ape clade (including humans), that is known to use more sophisticated social cognitive strategies. |
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School of Life Sciences, University of Liverpool, UK |
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English |
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0962-8452 |
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PMID:9332015 |
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2095 |
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Timney, B.; Keil, K. |
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Title |
Visual acuity in the horse |
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1992 |
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Vision Research |
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Vis. Res. |
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32 |
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12 |
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2289-2293 |
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Horse Visual acuity Visual discrimination |
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We assessed the ease with which horses could learn visual discriminations and measured their resolution acuity. We trained three horses to press their noses against one of two large wooden panels to receive a small food reward. Following training on a series of two-choice discrimination tasks, resolution acuity was measured. Although there was some variability between animals, the best acuity obtained was 23.3 c deg-1. Within the margin of error imposed by limited anatomical data, the obtained values are consistent with predictions based on retinal ganglion cell density estimates and posterior nodal distance/axial length ratios. They suggest that the resolution acuity of the horse is limited by ganglion cell density in the temporal portion of the narrow visual streak. |
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refbase @ user @ |
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851 |
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Timney, B.; Macuda, T. |
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Title |
Vision and hearing in horses |
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2001 |
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Journal of the American Veterinary Medical Association |
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J Am Vet Med Assoc |
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218 |
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10 |
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1567-1574 |
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Equine Behaviour @ team @ room B 3.029 |
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2278 |
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Burger, J.; Gochfeld. |
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Vigilance in African mammals: differences among mothers, other females, and males. |
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1994 |
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Behaviour |
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Behaviour |
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131 |
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3-4 |
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153-169 |
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Equine Behaviour @ team @ |
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2252 |
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Templeton, J.J.; Giraldeau, L.-A. |
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Vicarious sampling: the use of personal and public information by starlings foraging in a simple patchy environment |
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Journal Article |
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1996 |
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Behavioral Ecology and Sociobiology |
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Behav. Ecol. Sociobiol. |
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38 |
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2 |
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105-114 |
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Social foraging ? Patch sampling ? Public information ? Sturnidae |
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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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Orlov Vn, |
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Veränderungen am Schädel von E. hemionus Pall und zur Frage der Evolution der Pferde |
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1968 |
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from Professor Hans Klingels Equine Reference List |
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1440 |
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Moon, C.; Baldridge, M.T.; Wallace, M.A.; Burnham, C.-A.D.; Virgin, H.W.; Stappenbeck, T.S. |
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Vertically transmitted faecal IgA levels determine extra-chromosomal phenotypic variation |
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2015 |
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Nature |
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Nature |
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521 |
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7550 |
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90-93 |
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Phenotype |
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The proliferation of genetically modified mouse models has exposed phenotypic variation between investigators and institutions that has been challenging to control1-5. In many cases, the microbiota is the presumed culprit of the variation. Current solutions to account for phenotypic variability include littermate and maternal controls or defined microbial consortia in gnotobiotic mice6,7. In conventionally raised mice, the microbiome is transmitted from the dam2,8,9. Here we show that microbially–driven dichotomous fecal IgA levels in WT mice within the same facility mimic the effects of chromosomal mutations. We observed in multiple facilities that vertically-transmissible bacteria in IgA-Low mice dominantly lowered fecal IgA levels in IgA-High mice after cohousing or fecal transplantation. In response to injury, IgA-Low mice showed increased damage that was transferable by fecal transplantation and driven by fecal IgA differences. We found that bacteria from IgA-Low mice degraded the secretory component (SC) of SIgA as well as IgA itself. These data indicate that phenotypic comparisons between mice must take into account the non-chromosomal hereditary variation between different breeders. We propose fecal IgA as one marker of microbial variability and conclude that cohousing and/or fecal transplantation enables analysis of progeny from different dams. |
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Department of Pathology and Immunology, Washington University School of Medicine, St Louis, Missouri 63110, USA. |
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0028-0836 |
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Equine Behaviour @ team @ |
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6005 |
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Author |
GRZIMEK B |
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Title |
Versuche über das Farbsehen von Pflanzenfressern., |
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1952 |
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Zeitschrift für Tierpsychologie |
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Z. Tierpsychol. |
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9 |
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from Professor Hans Klingels Equine Reference List |
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1149 |
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Ebhardt H, |
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Title |
Verhaltensweisen von Islandpferden in einem norddeutschen Freigelände |
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1954 |
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Säugetierk Mitt |
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2 |
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145-154 |
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from Professor Hans Klingels Equine Reference List |
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1040 |
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