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| Author | Bourjade, M.; Moulinot, M.; Henry, S.; Richard-Yris, M.-A. Hausberger.M | ||||
| Title | Could Adults be Used to Improve Social Skills of Young Horses, Equus caballus? | Type | Journal Article | ||
| Year | 2008 | Publication | Ethology | Abbreviated Journal | Ethology |
| Volume | 50 | Issue | 4 | Pages | 408-417 |
| Keywords | horse • social influence • young-adult interaction • social development | ||||
Abstract  |
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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| Call Number | Equine Behaviour @ team @ | Serial | 4800 | ||
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| Author | Bourjade, M.; Thierry, B.; Maumy, M.; Petit, O. | ||||
| Title | Decision-making in Przewalski horses (Equus ferus przewalskii) is driven by the ecological contexts of collective movements | Type | Journal Article | ||
| Year | 2009 | Publication | Ethology | Abbreviated Journal | Ethology |
| Volume | 115 | Issue | 4 | Pages | 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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| Call Number | Equine Behaviour @ team @ | Serial | 4801 | ||
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| Author | Briard, L.; Dorn, C.; Petit, O. | ||||
| Title | Personality and Affinities Play a Key Role in the Organisation of Collective Movements in a Group of Domestic Horses | Type | Journal Article | ||
| Year | 2015 | Publication | Ethology | Abbreviated Journal | Ethology |
| Volume | 121 | Issue | 9 | Pages | 888-902 |
| Keywords | decision-making; equids; hierarchy; leadership; social network | ||||
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Understanding how groups of individuals with different motives come to daily decisions about the exploitation of their environment is a key question in animal behaviour. While interindividual differences are often seen only as a threat to group cohesion, growing evidence shows that they may to some extent facilitate effective collective action. Recent studies suggest that personality differences influence how individuals are attracted to conspecifics and affect their behaviour as an initiator or a follower. However, most of the existing studies are limited to a few taxa, mainly social fish and arthropods. Horses are social herbivores that live in long-lasting groups and show identifiable personality differences between individuals. We studied a group of 38 individuals living in a 30-ha hilly pasture. Over 200 h, we sought to identify how far individual differences such as personality and affinity distribution affect the dynamic of their collective movements. First, we report that individuals distribute their relationships according to similar personality and hierarchical rank. This is the first study that demonstrates a positive assortment between unrelated individuals according to personality in a mammal species. Second, we measured individual propensity to initiate and found that bold individuals initiated more often than shy individuals. However, their success in terms of number of followers and joining duration did not depend on their individual characteristics. Moreover, joining process is influenced by social network, with preferred partners following each other and bolder individuals being located more often at the front of the movement. Our results illustrate the importance of taking into account interindividual behavioural differences in studies of social behaviours. | ||||
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| ISSN | 1439-0310 | ISBN | Medium | ||
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| Notes | Approved | no | |||
| Call Number | Equine Behaviour @ team @ | Serial | 6153 | ||
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| Author | Amandine Ramseyer; Bernard Thierry; Alain Boissy; Bertrand Dumont | ||||
| Title | Decision-making Processes in Group Departures of Cattle | Type | Journal Article | ||
| Year | 2009 | Publication | Ethology | Abbreviated Journal | Ethology |
| Volume | 115 | Issue | 10 | Pages | 948-957 |
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To keep social cohesiveness, group-living animals have to reach consensus decisions through recruitment processes. This implies that decision-making depends on the behaviours and social relationships of several group members at different stages of movements. We tested these assumptions in a group of fifteen 18-mo-old Charolais heifers (Bos taurus) at pasture, in which two observers continuously videotaped social interactions and group departures after resting periods. These departures were preceded by a phase of preparation characterized by an increase in activity. The number of heifers participating to a movement increased with the number of group members oriented in the direction of the movement before departure. The first moving animal also recruited a higher number of mates when it had a greater number of close neighbours, the first individuals to follow being mainly its preferential partners. Coercive interactions such as pressing behaviours were observed within the 5 min preceding or following departure. After departure, the numbers of walks and restarts of the first two movers were still operative in recruiting others. The frequency of pauses of the first mover was significantly higher when it was not followed, meaning that it adjusted its behaviour to that of other group members. Decision-making was distributed among group members, with any individual being liable to move first. The behaviour of cows and their spatial distribution before departure, at departure and after departure significantly affected the number of participants in the movement, demonstrating that decision-making was time-distributed in the studied cattle group. | ||||
| Address | INRA, UR 1213 Herbivores, Saint-Gens-Champanelle, France; Dpartement Ecologie, Physiologie et Ethologie, IPHC, Centre National de la Recherche Scientifique, Universit de Strasbourg, Strasbourg, France | ||||
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| Publisher | Place of Publication | © 2009 Blackwell Verlag GmbH | Editor | ||
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| Call Number | Equine Behaviour @ team @ | Serial | 4992 | ||
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| Author | Shi, J.; Dunbar, R. | ||||
| Title | Feeding competition within a feral goat population on the Isle of Rum, NW Scotland | Type | Journal Article | ||
| Year | 2006 | Publication | Journal of Ethology | Abbreviated Journal | J. Ethol. |
| Volume | 24 | Issue | 2 | Pages | 117-124 |
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This study investigated feeding competition within and between different age-sex classes of feral goats (Capra hircus) on the Isle of Rum (northwest Scotland) from August to November 2000 (inclusive). Although contests in a feeding context were common, most were relatively passive: little overt agonistic behaviour was observed between opponents and the distance between feeding animals involved did not change significantly after an interaction. Month (but not sex or habitat type) had a significant effect on feeding interaction rates, and the proportion of interactions involving more intense forms of conflict was highest in November when forage availability was beginning to decline. The results show that the initiator won most feeding encounters, with adult males being dominant over females. The ability to win conflicts increased with age for both males and females. However, it decreased sharply for adult males older than 5 years, which may, in part, explain the reduced overwinter survival of these individuals. | ||||
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| Notes | Approved | no | |||
| Call Number | refbase @ user @ | Serial | 805 | ||
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| Author | Ellis, L. | ||||
| Title | Dominance and reproductive success among nonhuman animals: A cross-species comparison | Type | Journal Article | ||
| Year | 1995 | Publication | Ethology and Sociobiology | Abbreviated Journal | Ethol. a. Sociob. |
| Volume | 16 | Issue | 4 | Pages | 257-333 |
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This paper updates and extends Dewsbury's (1982) review of the literature on dominance and reproductive success (RS). The findings from approximately 700 studies are included, over two thirds of which were unavailable to Dewsbury. In order to give a highly condensed and yet meaningful overview, the main findings are represented in four tables, one for male nonprimates, one for female nonprimates, one for male primates, and one for female primates. In the tables for males, findings are analyzed in terms of six different indicators of RS, and in the tables for females, in terms of eight RS indicators. Outside the primate order, evidence largely supported the hypothesis that high-ranking males enjoy greater RS than do subordinate males. For females, studies are more evenly divided between those supporting the hypothesis that high rank and RS are positively correlated and those indicating no significant rank-RS relationship. This may reflect both the lower saliency of hierarchical relationships among females, as well as the lower variability in RS among females, relative to males. Among primates, a complex picture has emerged, especially in the case of males. Much of the complexity appears due to the importance of age and seniority in affecting dominance rank. Also, in some primate species, female preferences for sex partners seem to have little to do with the male's dominance rank, at least at the time mating takes place. Nevertheless, the majority of studies suggest that high- to middle-ranking males have at least a slight lifetime reproductive advantage over the lowest ranking males. | ||||
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| Notes | Approved | no | |||
| Call Number | refbase @ user @ | Serial | 722 | ||
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| Author | Houpt, K.A. | ||||
| Title | Review of some research areas of applied and theoretical interest in domestic animal behavior | Type | Journal Article | ||
| Year | 1980 | Publication | Applied Animal Ethology | Abbreviated Journal | Appl. Animal. Ethol. |
| Volume | 6 | Issue | 2 | Pages | 111-119 |
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There are numerous areas worthy of study in the field of domestic animal behavior or applied ethology. In this paper a few areas are offerred as particularly worthy of attention. These areas are worthwhile either because they have received little or no study and are of basic interest or because they have application to current problems of livestock production. The study of cat behavior falls in the former category. Neither the food and water sources, the reproductive success rate nor even the social interactions of cats in the large populations found in both rural and urban environments are known. Pigs as a species have already been the subjects of many behavior studies; nevertheless, there are still gaps in our knowledge of the underlying principles of swine behavior. The physiological basis of maternal behavior, for example, has not been studied in swine or in any domestic species. The sensory basis of udder location by the neonatal piglet deserves study also. Some aspects of olfactory and vocal communication of pigs have been studied, but only one of what may be a large number of pheromones of pigs has been chemically identified. The message conveyed by the vocal interactions between adult swine of the same sex is unknown, as is the role of facial and postural expressions in porcine communication. The two major problems of pig behavior under conditions of intensive livestock management are tail biting and reproductive failure. The application of behavioral techniques to these problems might help to attenuate those problems as well as broaden our understanding of normal pig behavior. Horse behavior has also been a relatively neglected field of study. Of particular interest is the significance of the flehmen gesture used by both mares and stallions in a variety of situations. Flehmen may be related to the function of the vomeronasal organ, but both observational and physiological studies should be performed to verify the hypothesis. | ||||
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| Notes | Approved | no | |||
| Call Number | refbase @ user @ | Serial | 508 | ||
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| Author | McFarland, R.; Majolo, B. | ||||
| Title | Reconciliation and the Costs of Aggression in Wild Barbary Macaques (Macaca sylvanus): A Test of the Integrated Hypothesis | Type | Journal Article | ||
| Year | 2011 | Publication | Ethology | Abbreviated Journal | |
| Volume | Issue | Pages | no-no | ||
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The ‘integrated hypothesis’ predicts that reconciliation (the post-conflict friendly interaction between former opponents observed in various group-living species) functions to reduce anxiety and the risk of aggression from the former opponent or a bystander in the aftermath of a conflict. It also predicts that relationship quality between opponents affects the occurrence of reconciliation and modulates the anxious response of the opponents after a conflict. Because of the asymmetric nature of aggressive interactions, the cost of aggression is likely to differ between the victim and the aggressor. The aim of this study was to test the predictions of the ‘integrated hypothesis’ independently for the victim and the aggressor of a conflict. We collected data on two wild groups of Barbary macaques. This study represents, to our knowledge, the first systematic test of the integrated hypothesis on wild, non-provisioned animals. Victims of aggression were at a greater risk of receiving aggression from the former opponent or a bystander after a conflict and showed elevated anxiety. We found no such costs for the aggressor. Reconciliation reduced anxiety in the victim but did not reduce their risk of receiving aggression. Finally, relationship quality affected the occurrence of reconciliation but did not modulate post-conflict anxiety. The results of our study show that the costs of aggression are asymmetrically distributed between the victim and the aggressor. Such differences are likely to lead to different social tactics used by the victim and the aggressor in the aftermath of a conflict. | ||||
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| Publisher | Blackwell Publishing Ltd | Place of Publication | Editor | ||
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| ISSN | 1439-0310 | ISBN | Medium | ||
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| Notes | Approved | no | |||
| Call Number | Equine Behaviour @ team @ | Serial | 5416 | ||
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| Author | Partridge, B.L. | ||||
| Title | Internal dynamics and the interrelations of fish in schools | Type | Journal Article | ||
| Year | 1981 | Publication | Journal of Comparative Physiology A: Neuroethology, Sensory, Neural, and Behavioral Physiology | Abbreviated Journal | J Comp Physiol Sensory Neural Behav Physiol |
| Volume | 144 | Issue | 3 | Pages | 313-325 |
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The three-dimensional structure of schools of saithe (Pollachius virens) and the interactions between individuals over time were analyzed in 12,240 frames of videotape sampled at 2.7 Hz. Time series analyses of the interactions between identified individuals allowed testing of assumptions of anonymity vs. leadership in schools and investigation of the transfer of information between individuals by which collective decisions are made. Results include the following:1.Saithe match changes in both swimming direction and speed of their neighbors but correlations are greater for swimming speed. Average speed of the school does not greatly affect correlations between neighboring fish although the reaction latencies may be somewhat increased. As shown previously (Partridge et al. 1980) nearest neighbor distance (NND) decreases with increasing school velocity.2.Saithe simultaneously match the headings and swimming speeds of at least their first two nearest neighbors within the school (NN1 and NN2). Partialling out the correlation between a fish's neighbors demonstrates that a fish's correlation to his second nearest neighbor (NN2) is not simply a transitive function of mutual correlation between the NN1 and NN2.3.Several sources of individual variation in schooling performance were examined. In all respects except one, that of preferred positions within the school, saithe showed no individual differences, i.e., some were not “better schoolers” than others. Although fish in the school differed in length by up to a factor of 2.5, no size related effects in NND or nearest neighbor positioning were found.4.Single Linkage Cluster Analysis (SLCA) of the cross-correlations of fishs' swimming speeds and directions demonstrated quantitatively the existence of subgroups within schools if they contain more than 10-11 members. Subgroups acting more-or-less independently in terms of short term variations in speed and direction nonetheless remained within the school as a whole and were not often apparent to observers since members of one group interdigitated with those of another. How individuals know to which subgroup they belong remains unanswered. | ||||
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| Call Number | Serial | 2063 | |||
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| Author | Baragli, P.; Vitale, V.; Paoletti, E.; Sighieri, C.; Reddon, A.R. | ||||
| Title | Detour behaviour in horses (Equus caballus) | Type | Journal Article | ||
| Year | 2011 | Publication | Journal of Ethology | Abbreviated Journal | J. Ethol. |
| Volume | 29 | Issue | 2 | Pages | 227-234 |
| Keywords | Detour behaviour; Equus caballus; Horses; Lateralization; Spatial reasoning | ||||
| Abstract |
The objective of this study was to investigate the ability of horses (Equus caballus) to detour around symmetric and asymmetric obstacles. Ten female Italian saddle horses were each used in three detour tasks. In the first task, the ability to detour around a symmetrical obstacle was evaluated; in the second and third tasks subjects were required to perform a detour around an asymmetrical obstacle with two different degrees of asymmetry. The direction chosen to move around the obstacle and time required to make the detour were recorded. The results suggest that horses have the spatial abilities required to perform detour tasks with both symmetric and asymmetric obstacles. The strategy used to perform the task varied between subjects. For five horses, lateralized behaviour was observed when detouring the obstacle; this was consistently in one direction (three on the left and two on the right). For these horses, no evidence of spatial learning or reasoning was found. The other five horses did not solve this task in a lateralized manner, and a trend towards decreasing lateralization was observed as asymmetry, and hence task difficulty, increased. These non-lateralized horses may have higher spatial reasoning abilities. | ||||
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| Publisher | Springer Japan | Place of Publication | Editor | ||
| Language | English | Summary Language | Original Title | ||
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| ISSN | 0289-0771 | ISBN | Medium | ||
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| Notes | Approved | no | |||
| Call Number | Equine Behaviour @ team @ | Serial | 5686 | ||
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