| Records |
| Author |
Palagi, E. |
| Title |
Sharing the motivation to play: the use of signals in adult bonobos |
Type |
Journal Article |
| Year |
2008 |
Publication |
Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
| Volume |
75 |
Issue |
3 |
Pages |
887-896 |
| Keywords |
bonobo; full play face; Pan paniscus; play face; playful propensity; ritualization; social play; social tolerance; solitary play; visual communication |
| Abstract |
Gestures and facial displays are involved in regulating many aspects of mammal social life such as aggression, dominance-subordinate relationships, appeasement and play. Playful activity is an interesting behaviour for examining the role of signals as intentional communication systems. When animals play they perform patterns that are used in other serious contexts. To avoid miscommunication, many species have evolved signals to maintain a playful mood. Bonobos, Pan paniscus, with their flexible social relationships and playful propensity, may represent a good model species to test some hypotheses on adult play signalling. I analysed the potential roles of facial play expressions and solitary play in soliciting and regulating social play and found that adult bonobos used the play face (relaxed open-mouth display) in a selective manner. Play faces were more frequent during social than solitary play and, within social play, polyadic sessions (even though less frequent than dyadic sessions) were characterized by a higher frequency of signals. Following the rule of play intensity matching, play faces were more frequent when the two players matched in age and size (sessions among adults). Moreover, among dyads there was a positive correlation between the frequency of aggressive interactions performed and the frequency of play signals used, thus suggesting that signals are crucial in play negotiations among individuals showing high baseline levels of aggression. Finally, solitary play, especially when it involved pirouettes and somersaults, had an important role in triggering social play. |
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Equine Behaviour @ team @ |
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4316 |
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| Author |
Peirce, J.W.; Leigh, A.E.; Kendrick, K.M. |
| Title |
Configurational coding, familiarity and the right hemisphere advantage for face recognition in sheep |
Type |
Journal Article |
| Year |
2000 |
Publication |
Neuropsychologia |
Abbreviated Journal |
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| Volume |
38 |
Issue |
4 |
Pages |
475-483 |
| Keywords |
Asymmetry; Hemispheric lateralisation; Chimeric; Face processing; Expertise; Internal features |
| Abstract |
This study examined characteristics of visual recognition of familiar and unfamiliar faces in sheep using a 2-way discrimination task. Of particular interest were effects of lateralisation and the differential use of internal (configurational) vs external features of the stimuli. Animals were trained in a Y-maze to identify target faces from pairs, both of which were familiar (same flock as the subjects) or both of which were unfamiliar (different flock). Having been trained to identify the rewarded face a series of stimuli were presented to the sheep, designed to test for the use of each visual hemifield in the discriminations and the use of internal and external facial cues. The first experiment showed that there was a left visual hemifield (LVF) advantage in the identification of [`]hemifaces', and [`]mirrored hemifaces' and [`]chimeric' faces and that this effect was strongest with familiar faces. This represents the first evidence for visual field bias outside the primate literature. Results from the second experiment showed that, whilst both familiar and unfamiliar faces could be identified by the external features alone, only the familiar faces could be recognised by the internal features alone. Overall the results suggest separate recognition methods for socially familiar and unfamiliar faces, with the former being coded more by internal, configurational cues and showing a lateral bias to the left visual field. |
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0028-3932 |
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no |
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Equine Behaviour @ team @ |
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5343 |
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| Author |
Méary, D.; Li, Z.; Li, W.; Guo, K.; Pascalis, O. |
| Title |
Seeing two faces together: preference formation in humans and rhesus macaques |
Type |
Journal Article |
| Year |
2014 |
Publication |
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Abbreviated Journal |
Animal Cognition |
| Volume |
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Issue |
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Pages |
1-13 |
| Keywords |
Humans; Rhesus macaques; Preferences; Faces; Eye-tracking |
| Abstract |
Humans, great apes and old world monkeys show selective attention to faces depending on conspecificity, familiarity, and social status supporting the view that primates share similar face processing mechanisms. Although many studies have been done on face scanning strategy in monkeys and humans, the mechanisms influencing viewing preference have received little attention. To determine how face categories influence viewing preference in humans and rhesus macaques (Macaca mulatta), we performed two eye-tracking experiments using a visual preference task whereby pairs of faces from different species were presented simultaneously. The results indicated that viewing time was significantly influenced by the pairing of the face categories. Humans showed a strong bias towards an own-race face in an Asian–Caucasian condition. Rhesus macaques directed more attention towards non-human primate faces when they were paired with human faces, regardless of the species. When rhesus faces were paired with faces from Barbary macaques (Macaca sylvanus) or chimpanzees (Pan troglodytes), the novel species’ faces attracted more attention. These results indicate that monkeys’ viewing preferences, as assessed by a visual preference task, are modulated by several factors, species and dominance being the most influential. |
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Springer Berlin Heidelberg |
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English |
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1435-9448 |
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no |
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Equine Behaviour @ team @ |
Serial |
5790 |
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| Author |
Proops, L.; Grounds, K.; Smith, A.V.; McComb, K. |
| Title |
Animals Remember Previous Facial Expressions that Specific Humans Have Exhibited |
Type |
Journal Article |
| Year |
2018 |
Publication |
Current Biology |
Abbreviated Journal |
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| Volume |
28 |
Issue |
9 |
Pages |
1428-1432.e4 |
| Keywords |
affective processing; face processing; ; animal-human interaction; interspecific communication; animal memory |
| Abstract |
Summary For humans, facial expressions are important social signals, and how we perceive specific individuals may be influenced by subtle emotional cues that they have given us in past encounters. A wide range of animal species are also capable of discriminating the emotions of others through facial expressions [1, 2, 3, 4, 5], and it is clear that remembering emotional experiences with specific individuals could have clear benefits for social bonding and aggression avoidance when these individuals are encountered again. Although there is evidence that non-human animals are capable of remembering the identity of individuals who have directly harmed them [6, 7], it is not known whether animals can form lasting memories of specific individuals simply by observing subtle emotional expressions that they exhibit on their faces. Here we conducted controlled experiments in which domestic horses were presented with a photograph of an angry or happy human face and several hours later saw the person who had given the expression in a neutral state. Short-term exposure to the facial expression was enough to generate clear differences in subsequent responses to that individual (but not to a different mismatched person), consistent with the past angry expression having been perceived negatively and the happy expression positively. Both humans were blind to the photograph that the horses had seen. Our results provide clear evidence that some non-human animals can effectively eavesdrop on the emotional state cues that humans reveal on a moment-to-moment basis, using their memory of these to guide future interactions with particular individuals. |
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0960-9822 |
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no |
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Equine Behaviour @ team @ |
Serial |
6394 |
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| Author |
Gleerup, K.B.; Lindegaard, C. |
| Title |
Recognition and quantification of pain in horses: A tutorial review |
Type |
Journal Article |
| Year |
2016 |
Publication |
Equine Veterinary Education |
Abbreviated Journal |
Equine Vet Educ |
| Volume |
28 |
Issue |
1 |
Pages |
47-57 |
| Keywords |
horse; pain evaluation; pain scale; pain behaviour; pain face |
| Abstract |
Summary Pain management is dependent on the quality of the pain evaluation. Ideally, pain evaluation is objective, pain-specific and easily incorporated into a busy equine clinic. This paper reviews the existing knowledge base regarding the identification and quantification of pain in horses. Behavioural indicators of pain in horses in the context of normal equine behaviour, as well as various physiological parameters potentially useful for pain evaluation, are discussed. Areas where knowledge is sparse are identified and a new equine pain scale based on results from all reviewed papers is proposed. Finally, the most important considerations in relation to the implementation of a pain scale in a hospital setting are discussed. |
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American Medical Association (AMA) |
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0957-7734 |
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https://doi.org/10.1111/eve.12383 |
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no |
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Equine Behaviour @ team @ |
Serial |
6705 |
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| Author |
Parr, L.A.; de Waal, F.B. |
| Title |
Visual kin recognition in chimpanzees |
Type |
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| Year |
1999 |
Publication |
Nature |
Abbreviated Journal |
Nature |
| Volume |
399 |
Issue |
6737 |
Pages |
647-648 |
| Keywords |
Animals; *Behavior, Animal; Face; Female; Male; Pan troglodytes/*physiology |
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English |
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0028-0836 |
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PMID:10385114 |
Approved |
no |
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refbase @ user @ |
Serial |
195 |
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| Author |
Turner, A.; Kirkpatrick, J.F. |
| Title |
Effects of immunocontraception on population, longevity and body condition in wild mares (Equus caballus) |
Type |
Journal Article |
| Year |
2002 |
Publication |
Reproduction (Cambridge, England) Supplement |
Abbreviated Journal |
Reprod Suppl |
| Volume |
60 |
Issue |
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Pages |
187-195 |
| Keywords |
Animals; *Animals, Wild; Antigens/administration & dosage; Body Constitution; Contraception, Immunologic/methods/*veterinary; Egg Proteins/administration & dosage; Female; *Horses; Longevity; Membrane Glycoproteins/administration & dosage; Population Control; Population Dynamics; *Receptors, Cell Surface; Swine; Vaccines, Contraceptive/administration & dosage |
| Abstract |
Contraception is becoming a common approach for the management of captive and wild ungulates yet there are few data for contraceptive effects on entire populations. Management-level treatment of mares with porcine zona pellucida (PZP) vaccine resulted in zero population growth of the Assateague Island wild horse population within 1 year of initiation of treatment. Contraceptive efficacy was 90% for mares treated twice in the first year and annually thereafter. For mares given a single initial inoculation, contraceptive efficacy was 78%. The effort required to achieve zero population growth decreased, as 95, 83 and 84% of all adult mares were treated in each of the first 3 years, compared with 59 and 52% during the last 2 years. Mortality rates for mares and foals after the initiation of management-level treatments decreased below historic and pretreatment mortality rates of approximately 5%. Two new age classes have appeared among treated animals (21-25 years and > 25 years), indicating an increase in longevity among treated animals. Body condition scores for all horses, all adult mares and non-lactating mares increased significantly between summer 1989 and autumn 1999 but did not change significantly in lactating mares. These results provide reliable data for the construction of realistic models for contraceptive management of free-roaming or captive ungulate populations. |
| Address |
Assateague Island National Seashore, Berlin, MD 21811, USA |
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English |
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Edition |
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1477-0415 |
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| Notes |
PMID:12220158 |
Approved |
no |
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refbase @ user @ |
Serial |
142 |
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| Author |
Kirkpatrick, J.F.; Turner, A. |
| Title |
Reversibility of action and safety during pregnancy of immunization against porcine zona pellucida in wild mares (Equus caballus) |
Type |
Journal Article |
| Year |
2002 |
Publication |
Reproduction (Cambridge, England) Supplement |
Abbreviated Journal |
Reprod Suppl |
| Volume |
60 |
Issue |
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Pages |
197-202 |
| Keywords |
Animals; *Animals, Wild; Antigens/administration & dosage; Contraception, Immunologic/methods/*veterinary; Egg Proteins/administration & dosage; Female; Fertility; *Horses; Immunization, Secondary/veterinary; Membrane Glycoproteins/administration & dosage; Population Control; Pregnancy; *Receptors, Cell Surface; Safety; Swine; Time Factors; Vaccines, Contraceptive/*administration & dosage |
| Abstract |
Contraceptive management of publicly valued wildlife species requires safeguards to ensure that these populations are preserved in a healthy state. In addition, reversibility of contraceptive effects and safety in pregnant animals are major concerns. A population of wild horses has been immunized against porcine zona pellucida (PZP) over a 12 year period on Assateague Island National Seashore, MD (ASIS). Mares initially received one or two 65 microg inoculations and once a year 65 microg booster inoculations, all delivered by dart. All young mares aged > 2 years were treated with PZP for 3 consecutive years regardless of whether they have bred successfully and they were then removed from treatment until they had foaled. All mares vaccinated for 1 or 2 consecutive years became fertile again and 69% of mares treated for 3 consecutive years returned to fertility. All five mares treated for 4 or 5 consecutive years have also returned to fertility, but over longer periods of time. Mares treated for 7 consecutive years have not returned to fertility, but several, while still infertile, have started ovulating again. There was no difference in survival rates between foals born to treated and untreated mares, and PZP treatment of pregnant mares did not affect subsequent fertility of their female offspring. |
| Address |
Science and Conservation Center, ZooMontana, Billings 59106, USA. zoolab@wtp.net |
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English |
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1477-0415 |
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| Notes |
PMID:12220160 |
Approved |
no |
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refbase @ user @ |
Serial |
141 |
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| Author |
Washburn, D.A.; Astur, R.S. |
| Title |
Exploration of virtual mazes by rhesus monkeys (Macaca mulatta) |
Type |
Journal Article |
| Year |
2003 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
| Volume |
6 |
Issue |
3 |
Pages |
161-168 |
| Keywords |
Animals; Choice Behavior/*physiology; Computer Peripherals; Macaca mulatta/*physiology; Male; Maze Learning/*physiology; Space Perception/*physiology; User-Computer Interface |
| Abstract |
A chasm divides the huge corpus of maze studies found in the literature, with animals tested in mazes on the one side and humans tested with mazes on the other. Advances in technology and software have made possible the production and use of virtual mazes, which allow humans to navigate computerized environments and thus for humans and nonhuman animals to be tested in comparable spatial domains. In the present experiment, this comparability is extended even further by examining whether rhesus monkeys (Macaca mulatta) can learn to explore virtual mazes. Four male macaques were trained to manipulate a joystick so as to move through a virtual environment and to locate a computer-generated target. The animals succeeded in learning this task, and located the target even when it was located in novel alleys. The search pattern within the maze for these animals resembled the pattern of maze navigation observed for monkeys that were tested on more traditional two-dimensional computerized mazes. |
| Address |
Department of Psychology, Georgia State University, Atlanta, GA 30303, USA. dwashburn@gsu.edu |
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English |
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1435-9448 |
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| Notes |
PMID:12750961 |
Approved |
no |
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Equine Behaviour @ team @ |
Serial |
2569 |
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| Author |
Iversen, I.H.; Matsuzawa, T. |
| Title |
Development of interception of moving targets by chimpanzees (Pan troglodytes) in an automated task |
Type |
Journal Article |
| Year |
2003 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
| Volume |
6 |
Issue |
3 |
Pages |
169-183 |
| Keywords |
Animals; Female; Hand/physiology; Motion Perception/*physiology; Movement/physiology; Pan troglodytes/*physiology; Spatial Behavior/*physiology; *Task Performance and Analysis; User-Computer Interface; Visual Perception/physiology |
| Abstract |
The experiments investigated how two adult captive chimpanzees learned to navigate in an automated interception task. They had to capture a visual target that moved predictably on a touch monitor. The aim of the study was to determine the learning stages that led to an efficient strategy of intercepting the target. The chimpanzees had prior training in moving a finger on a touch monitor and were exposed to the interception task without any explicit training. With a finger the subject could move a small “ball” at any speed on the screen toward a visual target that moved at a fixed speed either back and forth in a linear path or around the edge of the screen in a rectangular pattern. Initial ball and target locations varied from trial to trial. The subjects received a small fruit reinforcement when they hit the target with the ball. The speed of target movement was increased across training stages up to 38 cm/s. Learning progressed from merely chasing the target to intercepting the target by moving the ball to a point on the screen that coincided with arrival of the target at that point. Performance improvement consisted of reduction in redundancy of the movement path and reduction in the time to target interception. Analysis of the finger's movement path showed that the subjects anticipated the target's movement even before it began to move. Thus, the subjects learned to use the target's initial resting location at trial onset as a predictive signal for where the target would later be when it began moving. During probe trials, where the target unpredictably remained stationary throughout the trial, the subjects first moved the ball in anticipation of expected target movement and then corrected the movement to steer the ball to the resting target. Anticipatory ball movement in probe trials with novel ball and target locations (tested for one subject) showed generalized interception beyond the trained ball and target locations. The experiments illustrate in a laboratory setting the development of a highly complex and adaptive motor performance that resembles navigational skills seen in natural settings where predators intercept the path of moving prey. |
| Address |
Department of Psychology, University of North Florida, Jacksonville, FL 32224, USA. iiversen@unf.edu |
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English |
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1435-9448 |
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| Notes |
PMID:12761656 |
Approved |
no |
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Equine Behaviour @ team @ |
Serial |
2567 |
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