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Author |
Burden, F.; Thiemann, A. |
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Title |
Donkeys Are Different |
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Journal Article |
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Year |
2015 |
Publication |
Journal of Equine Veterinary Science |
Abbreviated Journal |
Proceedings of the 2015 Equine Science Society Symposium |
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35 |
Issue |
5 |
Pages |
376-382 |
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Keywords |
Donkey; Ass; Equid; Mule |
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Abstract |
As a unique species of equine, the donkey has certain specific variations from the horse. This review highlights the origins of the donkey and how this impacts on its behavior, physiology, and propensity to disease. The donkey is less of a flight animal and has been used by humans for pack and draught work, in areas where their ability to survive poorer diets, and transboundary disease while masking overt signs of pain and distress has made them indispensable to human livelihoods. When living as a companion animal, however, the donkey easily accumulates adipose tissue, and this may create a metabolically compromised individual prone to diseases of excess such as laminitis and hyperlipemia. They show anatomic variations from the horse especially in the hoof, upper airway, and their conformation. Variations in physiology lead to differences in the metabolism and distribution of many drugs. With over 44 million donkeys worldwide, it is important that veterinarians have the ability to understand and treat this equid effectively. |
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0737-0806 |
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Equine Behaviour @ team @ |
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6541 |
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Author |
Kis, A.; Huber, L.; Wilkinson, A. |
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Title |
Social learning by imitation in a reptile (Pogona vitticeps) |
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Journal Article |
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Year |
2015 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim.Cogn. |
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18 |
Issue |
1 |
Pages |
325-331 |
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The ability to learn through imitation is thought to be the basis of cultural transmission and was long considered a distinctive characteristic of humans. There is now evidence that both mammals and birds are capable of imitation. However, nothing is known about these abilities in the third amniotic class--reptiles. Here, we use a bidirectional control procedure to show that a reptile species, the bearded dragon (Pogona vitticeps), is capable of social learning that cannot be explained by simple mechanisms such as local enhancement or goal emulation. Subjects in the experimental group opened a trap door to the side that had been demonstrated, while subjects in the ghost control group, who observed the door move without the intervention of a conspecific, were unsuccessful. This, together with differences in behaviour between experimental and control groups, provides compelling evidence that reptiles possess cognitive abilities that are comparable to those observed in mammals and birds and suggests that learning by imitation is likely to be based on ancient mechanisms. |
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1435-9456 |
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Equine Behaviour @ team @ Kis2015 |
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6193 |
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Author |
Lee, P.C.; de Antonio, C. A. |
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Title |
Necessity, unpredictability and opportunity: An exploration of ecological and social drivers of behavioral innovation. |
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Journal Article |
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Year |
2015 |
Publication |
Animal Creativity and Innovation |
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317- 333 |
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Elsevier |
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Cambridge |
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Equine Behaviour @ team @ |
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6535 |
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Author |
Parisi, D.R.; Soria, S.A.; Josens, R. |
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Title |
Faster-is-slower effect in escaping ants revisited: Ants do not behave like humans |
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Journal Article |
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Year |
2015 |
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Safety Science |
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72 |
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Pages |
274-282 |
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Keywords |
Emergency; Evacuation; Egress; Ant egress; Crowd egress; Faster is slower; Pedestrian evacuation; Pedestrian dynamics |
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Abstract |
In this work we studied the trajectories, velocities and densities of ants when egressing under controlled levels of stress produced by a chemical repellent at different concentrations. We found that, unlike other animals escaping under life-and-death conditions and pedestrian simulations, ants do not produce a higher density zone near the exit door. Instead, ants are uniformly distributed over the available space allowing for efficient evacuations. Consequently, the faster-is-slower effect observed in ants (Soria et al., 2012) is clearly of a different nature to that predicted by de social force model. In the case of ants, the minimum evacuation time is correlated with the lower probability of taking backward steps. Thus, as biological model ants have important differences that make their use inadvisable for the design of human facilities. |
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0925-7535 |
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Equine Behaviour @ team @ |
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6161 |
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Author |
Seyfarth, R.M.; Cheney, D.L. |
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Title |
Social cognition |
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Journal Article |
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Year |
2015 |
Publication |
Animal Behaviour |
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103 |
Issue |
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Pages |
191-202 |
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Keywords |
evolution; fitness; future research; personality; selective pressure; skill; social cognition |
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The social intelligence hypothesis argues that competition and cooperation among individuals have shaped the evolution of cognition in animals. What do we mean by social cognition? Here we suggest that the building blocks of social cognition are a suite of skills, ordered roughly according to the cognitive demands they place upon individuals. These skills allow an animal to recognize others by various means; to recognize and remember other animals' relationships; and, perhaps, to attribute mental states to them. Some skills are elementary and virtually ubiquitous in the animal kingdom; others are more limited in their taxonomic distribution. We treat these skills as the targets of selection, and assume that more complex levels of social cognition evolve only when simpler methods are inadequate. As a result, more complex levels of social cognition indicate greater selective pressures in the past. The presence of each skill can be tested directly through field observations and experiments. In addition, the same methods that have been used to compare social cognition across species can also be used to measure individual differences within species and to test the hypothesis that individual differences in social cognition are linked to differences in reproductive success. |
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0003-3472 |
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no |
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Call Number |
Equine Behaviour @ team @ |
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6025 |
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Author |
Rørvang, M.V.; Ahrendt, L.P.; Christensen, J.W. |
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Title |
A trained demonstrator has a calming effect on naïve horses when crossing a novel surface |
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Journal Article |
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Year |
2015 |
Publication |
Applied Animal Behaviour Science |
Abbreviated Journal |
Appl. Anim. Behav. Sci. |
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Volume |
171 |
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Pages |
117-120 |
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Fear; Habituation; Social learning; Social transmission; Heart rate |
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Abstract Habituated horses have been found to have a calming effect on conspecifics in fear-eliciting situations. In practice, experienced horses are often used as companions when young horses are introduced to potentially frightening situations, like loading onto a trailer. However, studies of social transmission of habituation in horses are scarce. This study investigated if demonstration by a habituated demonstrator horse influenced the willingness of young Icelandic horses (n = 22, 3 years old) to cross a novel surface. Observer horses (n = 11) were allowed to observe the similarly aged demonstrator horse being led five times across a novel surface. Immediately afterwards the observer horses were given the opportunity to cross the novel surface themselves to obtain food on the other side. Controls (n = 11) were allowed to observe the demonstrator eating on the opposite side of the novel surface but not the demonstration of crossing the novel surface. All observers and controls succeeded the task, but observers had significantly lower average and maximum heart rate, compared to controls. This result suggests a calming effect of the demonstration, which could be exploited for habituation training of horses in fear-eliciting situations. |
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0168-1591 |
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Call Number |
Equine Behaviour @ team @ |
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5922 |
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Author |
Beery, A.K.; Kaufer, D. |
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Title |
Stress, social behavior, and resilience: Insights from rodents |
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Journal Article |
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Year |
2015 |
Publication |
Neurobiology of Stress |
Abbreviated Journal |
Neurobiol. Stress |
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Volume |
1 |
Issue |
Stress Resilience |
Pages |
116-127 |
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Keywords |
Stress; Anxiety; Social behavior; Sociality; Social stress; Social buffering |
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Abstract |
The neurobiology of stress and the neurobiology of social behavior are deeply intertwined. The social environment interacts with stress on almost every front: social interactions can be potent stressors; they can buffer the response to an external stressor; and social behavior often changes in response to stressful life experience. This review explores mechanistic and behavioral links between stress, anxiety, resilience, and social behavior in rodents, with particular attention to different social contexts. We consider variation between several different rodent species and make connections to research on humans and non-human primates. |
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2352-2895 |
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no |
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Equine Behaviour @ team @ |
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6413 |
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Author |
Brust, V.; Guenther, A. |
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Title |
Domestication effects on behavioural traits and learning performance: comparing wild cavies to guinea pigs |
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Journal Article |
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Year |
2015 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
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18 |
Issue |
1 |
Pages |
99-109 |
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The domestication process leads to a change in behavioural traits, usually towards individuals that are less attentive to changes in their environment and less aggressive. Empirical evidence for a difference in cognitive performance, however, is scarce. Recently, a functional linkage between an individual's behaviour and cognitive performance has been proposed in the framework of animal personalities via a shared risk-reward trade-off. Following this assumption, bolder and more aggressive animals (usually the wild form) should learn faster. Differences in behaviour may arise during ontogeny due to individual experiences or represent adaptations that occurred over the course of evolution. Both might singly or taken together account for differences in cognitive performance between wild and domestic lineages. To test for such possible linkages, we compared wild cavies and domestic guinea pigs, both kept in a university stock for more than 30 years under highly comparable conditions. Animals were tested in three behavioural tests as well as for initial and reversal learning performance. Guinea pigs were less bold and aggressive than their wild congeners, but learnt an association faster. Additionally, the personality structure was altered during the domestication process. The most likely explanation for these findings is that a shift in behavioural traits and their connectivity led to an altered cognitive performance. A functional linkage between behavioural and cognitive traits seems to exist in the proposed way only under natural selection, but not in animals that have been selected artificially over centuries. |
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1435-9456 |
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Equine Behaviour @ team @ Brust2015 |
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6194 |
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Author |
Moon, C.; Baldridge, M.T.; Wallace, M.A.; Burnham, C.-A.D.; Virgin, H.W.; Stappenbeck, T.S. |
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Title |
Vertically transmitted faecal IgA levels determine extra-chromosomal phenotypic variation |
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Journal Article |
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Year |
2015 |
Publication |
Nature |
Abbreviated Journal |
Nature |
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Volume |
521 |
Issue |
7550 |
Pages |
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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eng |
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0028-0836 |
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Equine Behaviour @ team @ |
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6005 |
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Author |
Lovrovich, P.; Sighieri, C.; Baragli, P. |
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Title |
Following human-given cues or not? Horses (Equus caballus) get smarter and change strategy in a delayed three choice task |
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Journal Article |
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Year |
2015 |
Publication |
Applied Animal Behaviour Science |
Abbreviated Journal |
Appl. Anim. Behav. Sci. |
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Volume |
166 |
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80-88 |
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Highlights
�Horses remember the location of food hidden by the experimenter after a delay.
�They understand the communicative meaning of a human positioned close to the target.
�The same horses are capable of changing their decision-making strategy.
�They are able to shift from accuracy inferred from human given cues to speed.
�Horses can use human cues or not depending on time, cost, experience and reward.
Abstract
To date, horses have seemed capable of using human local enhancement cues only when the experimenter remains close to the reward, since they fail to understand the communicative meaning of the human as momentary local enhancement cue (when the human is not present at the moment of the animal's choice). This study was designed to analyse the ability of horses to understand, remember and use human-given cues in a delayed (10 s) three-choice task. Twelve horses (experimental group) had to find a piece of carrot hidden under one of three overturned buckets after seeing the experimenter hide it. The results were then compared with those of a control group (twelve horses) that had to find the carrot using only the sense of smell or random attempts. At the beginning, the experimental horses made more correct choices at the first attempt, although they took more time to find the carrot. Later the same horses were less accurate but found the carrot in less time. This suggests that the value of the proximal momentary local enhancement cues became less critical. It seemed, in fact, that the experimental and control group had aligned their behaviour as the trials proceeded. Despite this similarity, in the second half of the trials, the experimental group tended to first approach the bucket where they had found the carrot in the immediately preceding trial. Our findings indicate that horses are capable of remembering the location of food hidden by the experimenter after a delay, by using the human positioned close to the target as valuable information. The same horses are also capable of changing their decision-making strategy by shifting from the accuracy inferred from human given cues to speed. Therefore, horses are able to decide whether or not to use human given-cues, depending on a speed-accuracy trade-off. |
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Elsevier |
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doi: 10.1016/j.applanim.2015.02.017 |
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Equine Behaviour @ team @ |
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5849 |
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