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Keiper, R.R.; Sambraus, H.H. |
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Title |
The stability of equine dominance hierarchies and the effects of kinship, proximity and foaling status on hierarchy rank |
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1986 |
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Applied Animal Behaviour Science |
Abbreviated Journal |
Appl. Anim. Behav. Sci. |
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16 |
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2 |
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121-130 |
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Dominance hierarchies were determined in four bands of feral horses living on Assateague Island. The bands varied in size from 10 to 16 horses, and consisted of one stallion, several mares and their offspring. The animals ranged in age from less than 1 to over 18 years. Field observation of all social interactions during the summer of 1981 was used to determine dominance. 1981 hierarchies for three of the bands were compared with hierarchies determined for the same bands in 1978, and showed that hierarchies change over time. Age was significantly correlated with rank. Mares with foals did not rank any higher in the hierarchies than mares without foals. Kinship did not appear to have an effect on dominance rank either, since neither juvenile nor adult offspring ranks correlated with the ranks of their mothers. The band stallion was not the highest-ranking animal of any band, but the location of the stallion peripheral to the main body of the band, the nature of his interactions with band members, and his length of residence in the band may have contributed to his low rank. |
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refbase @ user @ |
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683 |
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Smith-Funk, E.D.; Crowell-Davis, S.L. |
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Maternal behavior of draft mares (Equus caballus) with mule foals (Equus asinus x Equus caballus) |
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1992 |
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Applied Animal Behaviour Science |
Abbreviated Journal |
Appl. Anim. Behav. Sci. |
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33 |
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2-3 |
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93-119 |
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Draft mares and their mule foals were observed from the day of birth to Week 17 of each foal's life. The rate of nursing was recorded and the duration of nursing activity to the nearest second. The rate at which foals engaged in nursing activity varied at each age. The duration of nursing bouts varied slightly as the foals matured. Aggression was recorded during both nursing and non-nursing activity for both the mares and foals. Maternal aggression was highest during nursing activity, especially during the pre-nurse nuzzling period. Maternal aggression increased as the foals matured. Mother-directed foal aggression was primarily in response to maternal aggression. Spatial relationships between each focal dyad were recorded when the foals were upright, not nursing and when they were recumbent. Spatial relationships differed based on the foal's state. The activity in which the mare engaged while her foal was recumbent was recorded. The movements of the mares were also recorded during foal recumbency. Mares approached or maintained their distance from their recumbent foal more than they left their recumbent foal in all weeks of the study, except Week 2. |
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Equine Behaviour @ team @ |
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2272 |
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van Dierendonck, M.C.; Bandi, N.; Batdorj, D.; Dugerlham, S.; Munkhtsog, B. |
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Title |
Behavioural observations of reintroduced Takhi or Przewalski horses (Equus ferus przewalskii) in Mongolia |
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Year |
1996 |
Publication |
Applied Animal Behaviour Science |
Abbreviated Journal |
Appl. Anim. Behav. Sci. |
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50 |
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2 |
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95-114 |
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Horse; Przewalski's horse; Reintroduction; Time budget; Social organisation; Basic reference dataset |
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During 1992 and 1993, 14 reintroduced Przewalski Horses or Takhi (Equus ferus przewalskii) were studied in the Hustain Nuruu Mountain Steppe reserve in Mongolia. Most of the individuals did not know each other before reintroduction. These Takhi were the first of five groups due to be released in the reserve after an acclimatisation period of at least 1 year. During acclimatisation the Takhi, lived visually and acoustically separately, in fenced enclosures of approximately 45 ha each. The observations, mostly scan-sampling, were carried out in each season. The observation bouts were divided over six periods and over two harem herds. Two of the periods were in the same consecutive seasons, so comparison over the years was possible. Social integration within the Takhi herds was very high from the beginning, as described by the spatial relation and synchronisation data. Between 50 and 89% of the observation time, the behaviour of all herd members was synchronised. The amount of time spent grazing by the Takhi (30-68% of the daylight period) was similar to that of feral horses and Takhi in captivity and semi-reserves. The Takhi tended to rest in the morning and have a bimodal period of grazing at dawn and in the afternoon. The Takhi displayed clear habitat preferences for certain activities. They had a strong preference to rest at the highest point in their enclosure. They fed preferably on two or three different vegetation types (with five types available in each enclosure). The amount of time spent grazing during the non-growing seasons (49 +/- 15%) indicates that the feeding value and availability of food were sufficient. Health changes were detected adequately using condition scoring sheets. No supplementary food or water was supplied during the harsh winters. Moreover, low mortality rates and high reproductive success show that the mountain steppe is a habitat which is potentially suitable for establishing a healthy Takhi population. Takhi is the first species to return to its native habitat after living only in zoos for so many generations. |
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762 |
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Kaminski, J.; Call, J.; Fischer, J. |
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Title |
Word Learning in a Domestic Dog: Evidence for “Fast Mapping” |
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2004 |
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Science |
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Science |
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304 |
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5677 |
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1682-1683 |
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During speech acquisition, children form quick and rough hypotheses about the meaning of a new word after only a single exposure--a process dubbed “fast mapping.” Here we provide evidence that a border collie, Rico, is able to fast map. Rico knew the labels of over 200 different items. He inferred the names of novel items by exclusion learning and correctly retrieved those items right away as well as 4 weeks after the initial exposure. Fast mapping thus appears to be mediated by general learning and memory mechanisms also found in other animals and not by a language acquisition device that is special to humans. |
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10.1126/science.1097859 |
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Equine Behaviour @ team @ |
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4678 |
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Author |
Mitman, G. |
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Title |
Dominance, leadership, and aggression: animal behavior studies during the Second World War |
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Journal Article |
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Year |
1990 |
Publication |
Journal of the History of the Behavioral Sciences |
Abbreviated Journal |
J Hist Behav Sci |
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26 |
Issue |
1 |
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3-16 |
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*Aggression; Animals; Behavior, Animal; *Dominance-Subordination; History, 20th Century; *Leadership; Political Systems; *Social Dominance; United States |
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During the decade surrounding the Second World War, an extensive literature on the biological and psychological basis of aggression surfaced in America, a literature that in general emphasized the significance of learning and environment in the origins of aggressive behavior. Focusing on the animal behavior research of Warder Clyde Allee and John Paul Scott, this paper examines the complex interplay among conceptual, institutional, and societal forces that created and shaped a discourse on the subjects of aggression, dominance, and leadership within the context of World War II. The distinctions made between sexual and social dominance during this period, distinctions accentuated by the threat of totalitarianism abroad, and the varying ways that interpretations of behavior could be negotiated attests to the multiplicity of interactions that influence the development of scientific research. |
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University of Wisconsin |
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0022-5061 |
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PMID:2405050 |
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2044 |
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Palme, R. |
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Title |
Measuring fecal steroids: guidelines for practical application |
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Journal Article |
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2005 |
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Annals of the New York Academy of Sciences |
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Ann N Y Acad Sci |
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1046 |
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75-80 |
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Animals; Feces/*chemistry; Immunoassay/methods; Reproducibility of Results; Specimen Handling/methods; Steroids/*analysis |
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During the past 20 years, measuring steroid hormone metabolites in fecal samples has become a widely appreciated technique, because it has proved to be a powerful, noninvasive tool that provides important information about an animal's endocrine status (adrenocortical activity and reproductive status). However, although sampling is relatively easy to perform and free of feedback, a careful consideration of various factors is necessary to achieve proper results that lead to sound conclusions. This article aims to provide guidelines for an adequate application of these techniques. It is meant as a checklist that addresses the main topics of concern, such as sample collection and storage, time delay extraction procedures, assay selection and validation, biological relevance, and some confounding factors. These issues are discussed briefly here and in more detail in other recent articles. |
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Institute of Biochemistry, Department of Natural Sciences, University of Veterinary Medicine, Veterinaerplatz 1, A-1210 Vienna, Austria. Rupert.Palme@vu-wien.ac.at |
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0077-8923 |
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PMID:16055844 |
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Equine Behaviour @ team @ |
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4081 |
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Lachapelle, S.; Healey, J. |
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On Hans, Zou and the others: wonder animals and the question of animal intelligence in early twentieth-century France |
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2010 |
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Studies in History and Philosophy of Science Part C: Studies in History and Philosophy of Biological and Biomedical Sciences |
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41 |
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1 |
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12-20 |
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Animal experimentation; Animal intelligence; Clever Hans; Comparative psychology; Psychical research; Wonder animals |
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During the second half of the nineteenth century, the advent of widespread pet ownership was accompanied by claims of heightened animal abilities. Psychical researchers investigated many of these claims, including animal telepathy and ghostly apparitions. By the beginning of the twentieth century, news of horses and dogs with the ability to read and calculate fascinated the French public and scientists alike. Amidst questions about the justification of animal cruelty in laboratory experiments, wonder animals came to represent some extraordinary possibilities associated with their kind. Psychologists speculated on the feats of wonder animals. They considered the possibility that these animals shared consciousness and intelligence with humans, and that--if confirmed--their alleged amazing abilities could lead to a new understanding of cognition for all animals. This article focuses on the few years during which claims of wonder animals occupied a significant place in French psychology and psychical research. It argues that as explanations involving deception or unconscious cues gained increased acceptance, the interest in wonder animals soon led to a backlash in comparative psychology that had repercussions for all animals, particularly those used in experimentation, in that it contributed to the decline of research addressing cognitive abilities in non-human species. |
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1369-8486 |
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Equine Behaviour @ team @ |
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5079 |
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Verrill, S.; McDonnell, S. |
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Equal Outcomes with and without Human-to-Horse Eye Contact When Catching Horses and Ponies in an Open Pasture |
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2008 |
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Journal of Equine Veterinary Science |
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28 |
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5 |
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309-312 |
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Horse handling; Horse management; Eye contact; Interspecies interactions; Equine behavior |
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Each of 104 horses and ponies was approached for catching at pasture by the same human handler in a standard manner, either maintaining human-to-animal eye contact (EC+; n = 51) or avoiding eye contact (EC-; n = 53). A subset of 74 of these subjects were reevaluated 3 weeks later under similar standard conditions except with the eye contact condition opposite to that used in the first round. Nonparametric statistical methods were used to evaluate between subjects (round 1, n = 104) and within subjects (rounds 1 and 2, n = 74) comparisons of successful or unsuccessful catching outcome with EC+ and EC-. Catching outcomes were similar with eye contact condition. Although this study represents a single handler at one study site, results suggest that human-to-horse eye contact may not be an important influence on catching pastured horses. Certainly, further work is needed to better understand the role of eye contact in horse handling. |
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0737-0806 |
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Equine Behaviour @ team @ |
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4711 |
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Granquist, S.M.; Thorhallsdottir, A.G.; Sigurjonsdottir, H. |
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The effect of stallions on social interactions in domestic and semi feral harems |
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2012 |
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Applied Animal Behaviour Science |
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141 |
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1–2 |
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49-56 |
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Horses; Hierarchy; Icelandic horse; Social behaviour; Social bonds |
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Earlier research indicates that stallions may supress interactions of their harem members, leading to less stable hierarchies and friendship bonds in harems compared to non-stallion groups. In this paper, the effect of the presense of a stallion on the social behaviour of mares was studied by comparing six harems containing stallions to four mixed sex groups not containing stallions. Both temporary and permanent harems were studied, giving the possibility to investigate the effect of group stability on social interactions. A significant linear hierarchy was found in all non-stallion groups that were used for comparison, while the hierarchies were only found to be linear in three of the six harems containing stallions (Landaus h', p < 0.05). Aggression rate was lower (t-test, p < 0.05) and fewer friendship bonds (G-test, p < 0.0001) were found within the harems, compared to the groups without stallions. Stallions seldom intervene directly in interactions between harem members. Thus, our results give support to the hypothesis that stallions may suppress interactions of harem members, but in a more indirect way than with direct interference. In addition, our results give support for earlier findings that aggression rate may be affected by group stability. We found a higher aggression rate in the temporary harems compared to the permanent harems (Kruskal–Wallis, p < 0.05) and in the temporary non-stallion group compared to the permanent non-stallion group. The results have significance for further research on social structure of mammals, and may be applied in management of domestic animals. |
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0168-1591 |
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Equine Behaviour @ team @ |
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5619 |
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Nogueira, S.S. da C.; Nogueira-Filho, S.L.G.; Bassford, M.; Silvius, K.; Fragoso, J.M.V. |
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Feral pigs in Hawai`i: Using behavior and ecology to refine control techniques |
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Journal Article |
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2007 |
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Applied Animal Behaviour Science |
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Appl. Anim. Behav. Sci. |
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108 |
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1-2 |
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1-11 |
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Sus scrofa; Invasive species; Wildlife management; Pest management; Vertebrate pest control |
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Early Polynesians settlers were the first to introduce pigs to the Hawaiian Islands. Later Captain Cook brought European pigs during his first voyage to Hawai`i. Many other importations have followed. Animals from these introductions became feral and dispersed throughout the islands. Free-ranging pigs are now considered pests with negative impacts on some native biota. Several methods to control the ecological damage attributed to pigs have been adopted, such as fencing, hunting, live trapping and poisoning. However, the absence of behavioral knowledge in current control programs has resulted in inefficient management of this species. Therefore, the feral pig problem continues, and what before was almost strictly an agricultural and conservation concern has now become an urban problem as well. The aim of this study is to describe the state of knowledge on feral pig behavior in the Hawaiian Islands, introducing potential management approaches derived from the principles of behavioral ecology. Considering behavioral aspects of feral pig ecology, such as cognition and communication could help improve capture techniques, keep feral pigs away from urban areas and begin to resolve human-wildlife conflicts. |
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Equine Behaviour @ team @ |
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2887 |
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