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Majolo, B.; Ventura, R.; Koyama, N. F. |
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Title |
A Statistical Modelling Approach to the Occurrence and Timing of Reconciliation in Wild Japanese Macaques |
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2009 |
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Ethology |
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Ethology |
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115 |
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2 |
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152-166 |
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In various social species, animals have been observed to share friendly relationships with some group members and to resolve conflicts through reconciliation, the exchange of affiliative behaviour soon after a conflict that functions to restore the relationship between the former opponents. The valuable relationship hypothesis predicts that reconciliation should be observed more often after conflicts between friends. Friendly relationships can be described by three dimensions (i.e. value, security and compatibility); however, research into the relative importance of these dimensions for the occurrence of reconciliation is sparse. Moreover, reconciliation may depend on factors other than the social relationship between opponents including, for example, their social status or the context of the conflict. Our study aimed at analysing which factors are important determinants of reconciliation and at testing the valuable relationship hypothesis, by analysing the relative effects of relationship value, security and compatibility on the occurrence and timing of reconciliation. We collected data on two troops of wild Japanese macaques living on Yakushima Island, Japan, and selected the best predicting variables of reconciliation using linear mixed models. Our results show that reconciliation occurs more frequently, and earlier, after conflicts between opponents who exchange a higher percentage of grooming. Two additional variables related to relationship security and value were selected in the best models: frequency of aggression and of approaches resulting in tolerated co-feeding. Among the variables not related to relationship quality, distance between opponents at the end of the conflict, kinship, sex of the opponents and context of conflict (i.e. during feeding or social time) were included in our models. Our findings support the valuable relationship hypothesis and, in particular, highlight that the fitness-related benefits of social relationships (i.e. the relationship value) are important determinants of the evolution of friendly relationships and reconciliation. |
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Equine Behaviour @ team @ |
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4745 |
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Hampton, R.R. |
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Animal Minds: Beyond Cognition to Consciousness |
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2001 |
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Ethology |
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Ethology |
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107 |
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1055-1056 |
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refbase @ user @ |
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3487 |
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Majolo, B.; Ventura, R.; Koyama, N. F. |
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Title |
Anxiety Level Predicts Post-Conflict Behaviour in Wild Japanese Macaques (Macaca fuscata yakui) |
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2009 |
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Ethology |
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Ethology |
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115 |
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10 |
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986-995 |
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Reconciliation (i.e. the post-conflict exchange of friendly behaviour between former opponents) functions to control for the detrimental effects that aggression may have on social relationships. Studies conducted so far have investigated intra-individual sources of variation in post-conflict behaviour, showing that animals have a stronger increase in anxiety and are more likely to reconcile after conflicts with valuable partners, such as kin. Much less attention has been given to how differences between individuals in emotional profiles affect post-conflict behaviour. Our aim was to analyse whether inter-individual differences in baseline anxiety levels predicted the magnitude of the increase in anxiety following a conflict and the occurrence of reconciliation. We collected data on two groups of wild Japanese macaques (Macaca fuscata yakui). Animals having a higher baseline level of anxiety had a more dramatic anxious response following a conflict while controlling for a series of factors (e.g. relationship quality between opponents). These more anxious animals were also less likely to reconcile than more relaxed individuals. Therefore, more anxious animals face some social costs by being less able to cope with the post-conflict condition. We propose that differences in anxiety levels may be interpreted as tradeoffs between benefits and costs across conditions. For example, more anxious animals, who are less able to reconcile conflicts, might also be less exploratory and thus face a lower risk to eat unknown, poisonous food. |
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Department of Psychology, University of Lincoln, Brayford Pool, Lincoln, UK; Scottish Primate Research Group, School of Social and Health Sciences Division of Psychology, University of Abertay Dundee, Dundee, UK; Research Centre in Evolutionary Anthropology & Palaeoecology, School of Natural Science & Psychology, Liverpool John Moores University, Liverpool, UK DOI – 10.1111/j.1439-0310.2009.01685.x |
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© 2009 Blackwell Verlag GmbH |
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Equine Behaviour @ team @ |
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4996 |
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Author |
Koops, M.A.; Abrahams, M.V. |
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Title |
Assessing the Ideal Free Distribution: Do Guppies Use Aggression as Public Information about Patch Quality? |
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Year |
1999 |
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Ethology |
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Ethology |
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105 |
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9 |
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737-746 |
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Aggression can be costly to foragers, yet some recent research suggests that foragers should use aggression as a cue to patch quality (the attractive aggression hypothesis). If aggression is predictive of patch quality, then the attractive aggression hypothesis predicts that the distribution of foragers should follow the distribution of aggression. If, instead, aggression is repulsive because it is costly, then the distribution of foragers should diverge from the distribution of aggression. We tested the attractive aggression hypothesis using female guppies, Poecilia reticulata, and found that the distribution of foragers followed the distribution of food, but was unaffected by the distribution of aggression. These data do not support the attractive aggression hypothesis, but instead suggest that the distribution of aggression is a consequence of the distribution of foragers, and that aggression is not used as public information about patch quality. |
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Equine Behaviour @ team @ |
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4271 |
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Bamford, A.J.; Monadjem, A.; Hardy, I.C.W. |
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Title |
Associations of Avian Facial Flushing and Skin Colouration with Agonistic Interaction Outcomes |
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Journal Article |
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2010 |
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Ethology |
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Ethology |
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no-no |
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Abstract Facial flushing, a colour change caused by variation of blood flow through highly vascularized skin, has been observed in taxonomically diverse bird species but the function of the behaviour has not been assessed. Lappet-faced vultures, Aegypius tracheliotos, have unfeathered heads that can rapidly flush from pink to dark red, and this has been hypothesized to indicate contest ability in vulture gatherings. We show that adults with flushed heads won most interactions against those with pale heads. A previously unnoticed colour variation of the throat, visible only when the head is flushed, was also related to the outcome of interactions: blue-throated adults participated in, and won, more interactions than red-throated adults. We suggest that the non-fixed groups of which lappet-faced vulture populations consist promote the evolution of signals of dominance that can be adjusted extremely rapidly. |
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Blackwell Publishing Ltd |
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1439-0310 |
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Equine Behaviour @ team @ |
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5180 |
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Author |
Wolff, A.; Hausberger, M. |
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Title |
Behaviour of foals before weaning may have some genetic basis |
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Journal Article |
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Year |
1994 |
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Ethology |
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Ethology |
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96 |
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1 |
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1-10 |
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Locomotion; Suckling; Social behavior; Foraging behavior; Exploratory behavior; Interindividual comparison; Young animal; Genetic inheritance; Captivity; Social interaction; Feeding behavior; Perissodactyla; Ungulata; Mammalia; Vertebrata |
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In this preliminary study on foal behaviour, 13 French saddlebred foals (2-3 mo old) and their dams were observed on pasture. The most important findings are the interindividual quantitative differences in foal behaviour patterns as well as in the amount of mainly foal-initiated time spent at given distances from their mares. Interindividual differences seem in part due to a sire effect |
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Equine Behaviour @ team @ |
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5022 |
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Harcourt, J.L.; Biau, S.; Johnstone, R.; Manica, A. |
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Title |
Boldness and Information Use in Three-Spined Sticklebacks |
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Journal Article |
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2010 |
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Ethology |
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Ethology |
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116 |
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5 |
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440-447 |
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Abstract In foraging groups, individuals may utilise information from their social environment to aid decision making when choosing where to search for food. Little work has looked at the costs or benefits of behavioural differences, such as consistent individual variation in boldness, with respect to learning ability. Here, we investigate the response of three-spined stickleback (Gasterosteus aculeatus) to ‘social cues’, ‘local enhancement’ and ‘public information’ during foraging tasks. Our results confirm previous work suggesting that this species responds to social cues and local enhancement but not public information. Variation in boldness did not affect the use of different types of information. However, time taken to make a choice and reach a patch varied between fish with different levels of boldness. Contrary to expectation, shy fish were the more variable individuals, having a greater range of reaction times when responding to the tasks. This suggests that individual behavioural differences still play a role when utilising information obtained from the environment and may influence the relative benefits that could result in different contexts. |
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Blackwell Publishing Ltd |
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1439-0310 |
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Equine Behaviour @ team @ |
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5198 |
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Author |
Fraser, N.O.; Schino,G.; Aureli, F.F |
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Title |
Components of Relationship Quality in Chimpanzees |
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Journal Article |
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2008 |
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Ethology |
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Ethology |
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114 |
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9 |
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834-843 |
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A novel approach to studying social relationships in captive adult chimpanzees (Pan troglodytes) was taken by using principal components analysis (PCA) to extract three key components of relationship quality from nine behavioural variables. Based on the loadings of the behavioural variables, the components appeared to match previously hypothesized critical aspects of social relationships and were therefore labelled Value, Compatibility and Security. The effects of kinship, sex combination, age difference and time spent together on each of the relationship quality components were analysed. As expected, kin were found to have more valuable, compatible and secure relationships than non-kin. Female2013female dyads were found to be more compatible than male2013male or mixed-sex dyads, whereas the latter were found to be most secure. Partners of a similar age were found to have more secure and more valuable relationships than those with a larger age gap. Individuals that were together in the group for longer were more valuable and more compatible, but their relationships were found to be less secure than individuals that were together in the group for a shorter time. Although some of the results may be unexpected based on chimpanzee socio-ecology, they fit well overall with the history and social dynamics of the study group. The methods used confer a significant advantage in producing quantitative composite measures of each component of relationship quality, obtained in an objective manner. These findings therefore promote the use of such measures in future studies requiring an assessment of the qualities of dyadic social relationships. |
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Equine Behaviour @ team @ |
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4936 |
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Author |
Bourjade, M.; Moulinot, M.; Henry, S.; Richard-Yris, M.-A. Hausberger.M |
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Title |
Could Adults be Used to Improve Social Skills of Young Horses, Equus caballus? |
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Journal Article |
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Year |
2008 |
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Ethology |
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Ethology |
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50 |
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4 |
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408-417 |
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horse • social influence • young-adult interaction • social development |
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We investigated the effects of the introduction of foreign adults on the behavior of young horses. First, we observed the behavior of 1- and 2-year-old domestic horses housed in same-age and same-sex groups (a standard housing system, but different from a natural situation). Then, two same-sex adults were introduced into each experimental group. Observations made before, during and after an introduction indicated that young horses reared in homogeneous groups of young had different behaviors compared to other domestic horses reared under more socially natural conditions. After the introduction of adults, young horses expressed new behaviors, preferential social associations emerged, positive social behavior increased and agonistic interactions decreased. These results have important implications both for understanding the influence that adults may have on the behavior of young horses, and in terms of husbandry, indicating the importance of keeping young horses with adults, although further studies are still necessary. © 2008 Wiley Periodicals, Inc. Dev Psychobiol 50: 408-417, 2008. |
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Equine Behaviour @ team @ |
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4800 |
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Bourjade, M.; Thierry, B.; Maumy, M.; Petit, O. |
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Title |
Decision-making in Przewalski horses (Equus ferus przewalskii) is driven by the ecological contexts of collective movements |
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Journal Article |
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Year |
2009 |
Publication |
Ethology |
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Ethology |
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115 |
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4 |
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321-330 |
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We addressed decision-making processes in the collective movements of
two groups of Przewalski horses (Equus ferus przewalskii) living in a semi
free-ranging population. We investigated whether different patterns of
group movement are related to certain ecological contexts (habitat use
and group activity) and analysed the possible decision-making processes
involved. We found two distinct patterns; ‘single-bout’ and ‘multiplebout’
movements occurred in both study groups. The movements were
defined by the occurrence of collective stops between bouts and differed
by their duration, distance covered and ecological context. For both
movements, we found that a preliminary period involving several horses
occurred before departure. In single-bout movements, all group members
rapidly joined the first moving horse, independently of the preliminary
period. In multiple-bout movements, however, the joining
process was longer; in particular when the number of decision-makers
and their pre-departure behaviour before departure increased. Multiplebout
movements were more often used by horses to switch habitats and
activities. This observation demonstrates that the horses need more time
to resolve motivational conflicts before these departures. We conclude
that decision-making in Przewalski horses is based on a shared consensus
process driven by ecological determinants. |
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Equine Behaviour @ team @ |
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4801 |
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