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Author | Leiner, L. | ||||
Title | Vergleich verschiedener Methoden zur Angstextinktion bei Pferden | Type | Manuscript | ||
Year | 2006 | Publication | Abbreviated Journal | ||
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Abstract | Pferde sind Fluchttiere. Ihr Fluchtinstinkt bewirkt, dass sie sich leicht erschrecken und auch in diversen Situationen mit Flucht reagieren. Diese Tatsache ist den meisten Reitern bekannt, nur ist es für den Menschen teilweise schwer, mit dieser Eigenschaft auszukommen und sie zu verstehen oder gar nachzuvollziehen. So kommt es häufig zu Unfällen, die aus der Angst der Pferde resultieren, jedoch vermeidbar gewesen wären, hätte man ankündigende Signale früher erkannt. Des Weiteren kann die Angst eines Pferdes auch durch eine (Ver-) Weigerung, bestimmte Dinge zu tun, sichtbar werden. Diese Weigerung wird in der Reiterei gerne als „Bockigkeit“ und „Ungehorsam“ des Pferdes interpretiert und führt nicht selten zu einer Bestrafung. Insgesamt kann man sagen, dass angstauslösende Reize und die Reaktionen des Pferdes darauf oft falsch eingeschätzt oder falsch interpretiert werden und in der Folge auch falsch damit umgegangen wird. Ein Grund dafür ist sicher das fehlende Wissen über das Verhalten des Pferdes. Mit der vorliegenden Diplomarbeit soll ein Beitrag geleistet werden, das Pferd in seinem Angstverhalten besser zu verstehen. Ziel der Arbeit war es, das Verhalten des Pferdes bei verschiedenen Intensitäten von Angst zu untersuchen. Des Weiteren wurden Methoden untersucht, mit denen man die Angst von Pferden vor bestimmten Reizen und Situationen potentiell lindern kann, was letztendlich auch der Unfallvorbeugung dient. Die vorliegende Diplomarbeit wurde am Haupt- und Landesgestüt Marbach durchgeführt; 24 Junghengste standen hierfür zur Verfügung. Darunter waren 18 Deutsche Warmblüter, 3 Vollblutaraber und 3 Schwarzwälder Füchse (Kaltblüter), somit war auch ein Rassenvergleich möglich. In einem ersten Teil der Arbeit wurde untersucht, wie sich Angst bei Pferden äußert. Hierfür wurde ausgenutzt, dass Pferde ganz generell vor unbekannten, neuen Gegenständen Angst haben (= Neophobie). Zur Angstauslösung dienten als Konfrontationsgegenstände ein Sonnenschirm und eine Plastikplane. Beide Gegenstände waren für die Testpferde unbekannt. Das Verhalten sowie die Herzrate der Tiere wurden während aller Versuche beobachtet und quantifiziert. Nacheiner ersten Konfrontation wurden die Pferde an die Objekte gewöhnt (Extinktionstraining = Angstlöschung) und beobachtet welche Verhaltensymptome sich während dieser Gewöhnung (= Verlust der Neophobie) verändern. Die Hypothese war, dass tatsächliche Angstsymptome während der Gewöhnung immer seltener zu beobachten sind. Zusammenfassung III Als Verhaltensweisen für Angst konnten Ausweichbewegungen und Flucht, Lautäußerungen (Prusten und Schnauben), das Anspannen der Halsmuskulatur sowie das Vordrücken der Oberlippe identifiziert werden. Darüber hinaus wurde gezeigt, dass Abstufungen im Angstverhalten möglich sind: Bei sehr hohem Angstlevel sind Fluchtreaktionen zu beobachten. Bei mittlerem Angstlevel treten Ausweichbewegungen im Schritt und Lautäußerungen (Prusten und Schnauben) auf, bei geringem Angstlevel wird die Halsmuskulatur angespannt und die Oberlippe vorgedrückt. Im Zweiten Teil der Arbeit sollten verschiedene Methoden zur Angst-Extinktionauf ihre Wirksamkeit hin untersucht werden. Verwendet wurde in verschiedenen Testgruppen die Methode der Desensibilisierung (d.h. leichte, schrittweise stärker werdende Exposition gegenüber dem angstauslösenden Reiz), die Desensibilisierung mit Gegenkonditionierung (positive Verstärkung) durch Streicheln bzw. Reiben des Halses und die Desensibilisierung mit Gegenkonditionierung durch Futterbelohnung. Als Kontrollgruppe dienten Pferde, die ohne eine Konfrontation mit dem angstauslösenden Reiz nur über den Versuchplatz geführt wurden. Während des Extinktionstrainings konnte beobachtet werden, dass die Desensibilisierung mit Gegenkonditionierung zu einer schnelleren Extinktion führt als ohne Gegenkonditionierung. Allerdings zeigte ein Vergleich mit der Kontrollgruppe, die das Extinktionstraining nicht erfahren hatte, den gleichen Verlust an Angstverhalten wie die Gruppen mit Extinktionstraining. Dieses Ergebnis wurde so interpretiert, dass die wiederholte Exposition gegenüber angstauslösenden Reizen bei den durchgeführten Verhaltenstests zwar eine Rolle spielt, doch dass auch allein die Beschäftigung mit den Tieren zu einem Verlust von Angstverhalten führt (wahrscheinlich auch aufgrund eines wachsenden Vertrauens zur Führperson, die über das komplette Experiment hin die Gleiche blieb). |
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Corporate Author | Thesis | Diploma thesis | |||
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Notes | Approved | no | |||
Call Number | Equine Behaviour @ team @ | Serial | 6205 | ||
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Author | Fagot, J.; Cook, R.G. | ||||
Title | Evidence for large long-term memory capacities in baboons and pigeons and its implications for learning and the evolution of cognition | Type | Journal Article | ||
Year | 2006 | Publication | Proc Natl Acad Sci U S A | Abbreviated Journal | |
Volume | 103 | Issue | Pages | ||
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Notes | Approved | no | |||
Call Number | Equine Behaviour @ team @ Fagot2006 | Serial | 6278 | ||
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Author | Scott, L.D. | ||||
Title | Living donor liver transplant--is the horse already out of the barn? | Type | Journal Article | ||
Year | 2006 | Publication | The American Journal of Gastroenterology | Abbreviated Journal | Am J Gastroenterol |
Volume | 101 | Issue | 4 | Pages | 686-688 |
Keywords | Guidelines; Humans; Informed Consent; Liver Transplantation/*ethics; Living Donors/*ethics; Patient Selection; Risk Factors; Tissue and Organ Harvesting; Truth Disclosure | ||||
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Address | Division of Gastroenterology & Hepatology, The University of Texas Medical Branch, Galveston, Texas, USA | ||||
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Language | English | Summary Language | Original Title | ||
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ISSN | 0002-9270 | ISBN | Medium | ||
Area | Expedition | Conference | |||
Notes | PMID:16635214 | Approved | no | ||
Call Number | Serial | 1874 | |||
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Author | Palagi, E.; Cordoni, G.; Borgognini Tarli, S. | ||||
Title | Possible roles of consolation in captive chimpanzees (Pan troglodytes) | Type | Journal Article | ||
Year | 2006 | Publication | American Journal of Physical Anthropology | Abbreviated Journal | Am J Phys Anthropol |
Volume | 129 | Issue | 1 | Pages | 105-111 |
Keywords | Animals; Animals, Zoo/*physiology; Empathy; Female; Male; Pan troglodytes/*physiology; *Social Behavior; Stress/physiopathology/veterinary | ||||
Abstract | Empathy is a necessary prerequisite for the occurrence of consolation. The term “consolation” contains a hypothesis about function, which is distress alleviation. The present study aims to confirm the occurrence of consolation in captive chimpanzees via the post-conflict/matched-control method (PC-MC) and to suggest its possible roles. We collected 273 PC-MC pairs in the group of Pan troglodytes housed in the ZooParc de Beauval (France). We confirmed the presence of consolatory contacts (mean level of consolation, 49.5% +/- 22.3% SEM) in the colony. Consolation rates were significantly higher than reconciliation levels (mean level of reconciliation, 28.9% +/- 16.8% SEM). The level of consolation was greater in the absence of reconciliation than in the presence of it, suggesting that consolation might be an alternative behavior. As friendship and relatedness did not influence the occurrence of consolation, they did not seem to be the best prerequisites for this behavioral mechanism, at least in this chimpanzee colony. Affinitive contacts with third parties were significantly more frequent when the victim called attention to itself during severe aggressions by screaming. These high-pitched sounds seem to be useful in eliciting aid from conspecifics, as occurs in young humans. The occurrence of consolation reduced the likelihood of further attacks among group-members. From this perspective, both victims and consolers most likely gain potential advantages by interacting with each other when aggression is particularly severe, reconciliation is not immediate, and consequently social stress reaches high levels. | ||||
Address | Centro Interdipartimentale Museo di Storia Naturale e del Territorio, Universita di Pisa, 56010 Calci, Italy. betta.palagi@museo.unipi.it | ||||
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Language | English | Summary Language | Original Title | ||
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Series Volume | Series Issue | Edition | |||
ISSN | 0002-9483 | ISBN | Medium | ||
Area | Expedition | Conference | |||
Notes | PMID:16229027 | Approved | no | ||
Call Number | refbase @ user @ | Serial | 2871 | ||
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Author | Kurvers, C.M.H.C.; van Weeren, P.R.; Rogers, C.W.; van Dierendonck, M.C. | ||||
Title | Quantification of spontaneous locomotion activity in foals kept in pastures under various management conditions | Type | Journal Article | ||
Year | 2006 | Publication | American journal of veterinary research | Abbreviated Journal | Am J Vet Res |
Volume | 67 | Issue | 7 | Pages | 1212-1217 |
Keywords | Aging; Animal Husbandry; Animals; Female; Horses/*physiology; Male; Motor Activity/*physiology; Sex Characteristics | ||||
Abstract | OBJECTIVE: To describe spontaneous locomotion activity of foals kept under various management conditions and assess the suitability of global positioning system (GPS) technology for recording foal activity. Animals-59 foals. PROCEDURES: During the foals' first 4 months of life, 921 observation periods (15 minutes each) were collected and analyzed for locomotion activities. The GPS system was evaluated by simultaneously carrying out field observations with a handheld computer. RESULTS: Foals spent 0.5% of total observed time cantering, 0.2% trotting, 10.7% walking, 32.0% grazing, 34.8% standing, and 21.6% lying down. Total observed daytime workload (velocity x distance) in the first month was approximately twice that in the following months. Locomotion activity decreased with increasing age. Colts had more activity than fillies in certain periods, and foals that were stabled for some portion of the day had compensatory locomotion activity, which was probably insufficient to reach the level of foals kept continually outside. The GPS recordings and handheld-computer observations were strongly correlated for canter, trot, and walk and moderately correlated for standing and lying. Correlation for grazing was low. CONCLUSIONS AND CLINICAL RELEVANCE: Results indicated that domestically managed foals, when kept 24 h/d at pasture, will exercise at a level comparable with feral foals. High workload during the first month of life might be important for conditioning the musculoskeletal system. The GPS technique accurately quantified canter, trot, and walk activities; less accurately indexed resting; and was unsuitable for grazing because of the wide array of velocities used while foraging. | ||||
Address | Department of Equine Sciences, Faculty of Veterinary Medicine, Utrecht University, The Netherlands | ||||
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Publisher | Place of Publication | Editor | |||
Language | English | Summary Language | Original Title | ||
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Series Volume | Series Issue | Edition | |||
ISSN | 0002-9645 | ISBN | Medium | ||
Area | Expedition | Conference | |||
Notes | PMID:16817745 | Approved | no | ||
Call Number | Serial | 1786 | |||
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Author | Lin, Y.-L.; Moolenaar, H.; van Weeren, P.R.; van de Lest, C.H.A. | ||||
Title | Effect of microcurrent electrical tissue stimulation on equine tenocytes in culture | Type | Journal Article | ||
Year | 2006 | Publication | American Journal of Veterinary Research | Abbreviated Journal | Am J Vet Res |
Volume | 67 | Issue | 2 | Pages | 271-276 |
Keywords | Animals; Apoptosis; Cell Proliferation; Cells, Cultured; Electric Stimulation; *Horses; Tendons/*cytology | ||||
Abstract | OBJECTIVE: To determine effects of microcurrent electrical tissue stimulation (METS) on equine tenocytes cultured from the superficial digital flexor tendon (SDFT). SAMPLE POPULATION: SDFTs were collected from 20 horses at slaughter. PROCEDURE: Tenocytes were isolated following outgrowth from explants and grown in 48-well plates. Four methods of delivering current to the tenocytes with a METS device were tested. Once the optimal method was selected, current consisting of 0 (negative control), 0.05, 0.1, 0.5, 1.0, or 1.5 mA was applied to cells (8 wells/current intensity) once daily for 8 minutes. Cells were treated for 1, 2, or 3 days. Cell proliferation, DNA content, protein content, and apoptosis rate were determined. RESULTS: Application of microcurrent of moderate intensity increased cell proliferation and DNA content, with greater increases with multiple versus single application. Application of microcurrent of moderate intensity once or twice increased protein content, but application 3 times decreased protein content. Application of current a single time did not significantly alter apoptosis rate; however, application twice or 3 times resulted in significant increases in apoptosis rate, and there were significant linear (second order) correlations between current intensity and apoptosis rate when current was applied twice or 3 times. CONCLUSIONS AND CLINICAL RELEVANCE: Results of the present study indicate that microcurrent affects the behavior of equine tenocytes in culture, but that effects may be negative or positive depending on current intensity and number of applications. Therefore, results are far from conclusive with respect to the suitability of using METS to promote tendon healing in horses. | ||||
Address | Department of Equine Sciences, Faculty of Veterinary Medicine, State University of Utrecht, Utrecht, The Netherlands | ||||
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Publisher | Place of Publication | Editor | |||
Language | English | Summary Language | Original Title | ||
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Series Volume | Series Issue | Edition | |||
ISSN | 0002-9645 | ISBN | Medium | ||
Area | Expedition | Conference | |||
Notes | PMID:16454632 | Approved | no | ||
Call Number | Serial | 1878 | |||
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Author | Nettle, D. | ||||
Title | The evolution of personality variation in humans and other animals | Type | Journal Article | ||
Year | 2006 | Publication | The American Psychologist | Abbreviated Journal | Am Psychol |
Volume | 61 | Issue | 6 | Pages | 622-631 |
Keywords | Animals; Birds; *Evolution; Female; Fishes; Humans; Insects; Male; Personality/*genetics/*physiology | ||||
Abstract | A comprehensive evolutionary framework for understanding the maintenance of heritable behavioral variation in humans is yet to be developed. Some evolutionary psychologists have argued that heritable variation will not be found in important, fitness-relevant characteristics because of the winnowing effect of natural selection. This article propounds the opposite view. Heritable variation is ubiquitous in all species, and there are a number of frameworks for understanding its persistence. The author argues that each of the Big Five dimensions of human personality can be seen as the result of a trade-off between different fitness costs and benefits. As there is no unconditionally optimal value of these trade-offs, it is to be expected that genetic diversity will be retained in the population. | ||||
Address | University of Newcastle, Newcastle, United Kingdom. daniel.nettle@ncl.ac.uk | ||||
Corporate Author | Thesis | ||||
Publisher | Place of Publication | Editor | |||
Language | English | Summary Language | Original Title | ||
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Series Volume | Series Issue | Edition | |||
ISSN | 0003-066X | ISBN | Medium | ||
Area | Expedition | Conference | |||
Notes | PMID:16953749 | Approved | no | ||
Call Number | Equine Behaviour @ team @ | Serial | 4105 | ||
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Author | Brosnan, S.F.; Freeman, C.; De Waal, F.B.M. | ||||
Title | Partner's behavior, not reward distribution, determines success in an unequal cooperative task in capuchin monkeys | Type | Journal Article | ||
Year | 2006 | Publication | American journal of primatology | Abbreviated Journal | Am. J. Primatol. |
Volume | 68 | Issue | 7 | Pages | 713-724 |
Keywords | Animals; Behavior, Animal/*physiology; Cebus/*physiology; *Cooperative Behavior; Female; Food Preferences/physiology; Male; *Reward | ||||
Abstract | It was recently demonstrated that capuchin monkeys notice and respond to distributional inequity, a trait that has been proposed to support the evolution of cooperation in the human species. However, it is unknown how capuchins react to inequitable rewards in an unrestricted cooperative paradigm in which they may freely choose both whether to participate and, within the bounds of their partner's behavior, which reward they will receive for their participation. We tested capuchin monkeys with such a design, using a cooperative barpull, which has been used with great success in the past. Contrary to our expectations, the equity of the reward distribution did not affect success or pulling behavior. However, the behavior of the partner in an unequal situation did affect overall success rates: pairs that had a tendency to alternate which individual received the higher-value food in unequal reward situations were more than twice as successful in obtaining rewards than pairs in which one individual dominated the higher-value food. This ability to equitably distribute rewards in inherently biased cooperative situations has profound implications for activities such as group hunts, in which multiple individuals work together for a single, monopolizable reward. | ||||
Address | Living Links Center, Yerkes National Primate Research Center, Emory University, Atlanta, Georgia, USA. sbrosna@emory.edu | ||||
Corporate Author | Thesis | ||||
Publisher | Place of Publication | Editor | |||
Language | English | Summary Language | Original Title | ||
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 0275-2565 | ISBN | Medium | ||
Area | Expedition | Conference | |||
Notes | PMID:16786518 | Approved | no | ||
Call Number | refbase @ user @ | Serial | 160 | ||
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Author | Izar, P.; Ferreira, R.G.; Sato, T. | ||||
Title | Describing the organization of dominance relationships by dominance-directed tree method | Type | Journal Article | ||
Year | 2006 | Publication | American journal of primatology | Abbreviated Journal | Am. J. Primatol. |
Volume | 68 | Issue | 2 | Pages | 189-207 |
Keywords | Animals; Cebus/physiology; *Models, Biological; *Social Dominance | ||||
Abstract | Methods to describe dominance hierarchies are a key tool in primatology studies. Most current methods are appropriate for analyzing linear and near-linear hierarchies; however, more complex structures are common in primate groups. We propose a method termed “dominance-directed tree.” This method is based on graph theory and set theory to analyze dominance relationships in social groups. The method constructs a transitive matrix by imposing transitivity to the dominance matrix and produces a graphical representation of the dominance relationships, which allows an easy visualization of the hierarchical position of the individuals, or subsets of individuals. The method is also able to detect partial and complete hierarchies, and to describe situations in which hierarchical and nonhierarchical principles operate. To illustrate the method, we apply a dominance tree analysis to artificial data and empirical data from a group of Cebus apella. | ||||
Address | Department of Experimental Psychology, University of Sao Paulo, Brazil. patrizar@usp.br | ||||
Corporate Author | Thesis | ||||
Publisher | Place of Publication | Editor | |||
Language | English | Summary Language | Original Title | ||
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 0275-2565 | ISBN | Medium | ||
Area | Expedition | Conference | |||
Notes | PMID:16429416 | Approved | no | ||
Call Number | refbase @ user @ | Serial | 723 | ||
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Author | Mallavarapu, S.; Stoinski, T.S.; Bloomsmith, M.A.; Maple, T.L. | ||||
Title | Postconflict behavior in captive western lowland gorillas (Gorilla gorilla gorilla) | Type | Journal Article | ||
Year | 2006 | Publication | American journal of primatology | Abbreviated Journal | Am. J. Primatol. |
Volume | 68 | Issue | 8 | Pages | 789-801 |
Keywords | Animals; *Behavior, Animal; *Competitive Behavior; Conflict (Psychology); Female; Gorilla gorilla/*physiology/psychology; Male; Time Factors | ||||
Abstract | Postconflict (PC) behaviors, including reconciliation and consolation, have been observed in many primate and several nonprimate species. Using the PC-matched control (MC) method, PC behavior was examined in two groups (n=13) of captive western lowland gorillas, a species for which no conflict resolution data have been published. Analyses of 223 conflicts showed significantly more affiliation between former opponents after a conflict when compared to control periods, indicating reconciliation. Results also showed significantly more affiliation between the victim and a third-party after a conflict, indicating consolation. Both solicited and unsolicited consolation were observed. The majority of the affiliative interactions observed for both reconciliation and consolation were social proximity, which suggests that unlike most nonhuman primates, proximity, rather than physical contact, may be the main mechanism for resolving conflicts in western lowland gorillas. PC behavior was not uniform throughout the groups, but rather varied according to dyad type. | ||||
Address | Zoo Atlanta, Atlanta, Georgia 30315, USA. smallavarapu@zooatlanta.org | ||||
Corporate Author | Thesis | ||||
Publisher | Place of Publication | Editor | |||
Language | English | Summary Language | Original Title | ||
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 0275-2565 | ISBN | Medium | ||
Area | Expedition | Conference | |||
Notes | PMID:16847973 | Approved | no | ||
Call Number | refbase @ user @ | Serial | 2873 | ||
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