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Author | Reader, S.M.; Laland, K.N. | ||||
Title | Animal Innovation | Type | Book Whole | ||
Year | 2009 | Publication | Abbreviated Journal | ||
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Publisher | Oxford University Press | Place of Publication | Oxford | Editor | |
Language | Summary Language | Original Title | |||
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ISSN | ISBN | 978-0-19-852622 | Medium | ||
Area | Expedition | Conference | |||
Notes | Approved | no | |||
Call Number | Equine Behaviour @ team @ | Serial | 6381 | ||
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Author | Liker, A.; Bókony, V. | ||||
Title | Larger groups are more successful in innovative problem solving in house sparrows | Type | Journal Article | ||
Year | 2009 | Publication | Proceedings of the National Academy of Sciences of the United States of America | Abbreviated Journal | Proc Natl Acad Sci USA |
Volume | 106 | Issue | 19 | Pages | 7893-7898 |
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Abstract | Group living offers well-known benefits to animals, such as better predator avoidance and increased foraging success. An important additional, but so far neglected, advantage is that groups may cope more effectively with unfamiliar situations through faster innovations of new solutions by some group members. We tested this hypothesis experimentally by presenting a new foraging task of opening a familiar feeder in an unfamiliar way to house sparrows in small and large groups (2 versus 6 birds). Group size had strong effects on problem solving: sparrows performed 4 times more and 11 times faster openings in large than in small groups, and all members of large groups profited by getting food sooner (7 times on average). Independently from group size, urban groups were more successful than rural groups. The disproportionately higher success in large groups was not a mere consequence of higher number of attempts, but was also related to a higher effectiveness of problem solving (3 times higher proportion of successful birds). The analyses of the birds' behavior suggest that the latter was not explained by either reduced investment in antipredator vigilance or reduced neophobia in large groups. Instead, larger groups may contain more diverse individuals with different skills and experiences, which may increase the chance of solving the task by some group members. Increased success in problem solving may promote group living in animals and may help them to adapt quickly to new situations in rapidly-changing environments. | ||||
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Notes | Approved | no | |||
Call Number | Equine Behaviour @ team @ | Serial | 6538 | ||
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Author | Dunbar, R.I.M. | ||||
Title | The social brain hypothesis and its implications for social evolution | Type | Journal Article | ||
Year | 2009 | Publication | Annals of Human Biology | Abbreviated Journal | Annals of Human Biology |
Volume | 36 | Issue | 5 | Pages | 562-572 |
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Abstract | The social brain hypothesis was proposed as an explanation for the fact that primates have unusually large brains for body size compared to all other vertebrates: Primates evolved large brains to manage their unusually complex social systems. Although this proposal has been generalized to all vertebrate taxa as an explanation for brain evolution, recent analyses suggest that the social brain hypothesis takes a very different form in other mammals and birds than it does in anthropoid primates. In primates, there is a quantitative relationship between brain size and social group size (group size is a monotonic function of brain size), presumably because the cognitive demands of sociality place a constraint on the number of individuals that can be maintained in a coherent group. In other mammals and birds, the relationship is a qualitative one: Large brains are associated with categorical differences in mating system, with species that have pairbonded mating systems having the largest brains. It seems that anthropoid primates may have generalized the bonding processes that characterize monogamous pairbonds to other non-reproductive relationships (?friendships?), thereby giving rise to the quantitative relationship between group size and brain size that we find in this taxon. This raises issues about why bonded relationships are cognitively so demanding (and, indeed, raises questions about what a bonded relationship actually is), and when and why primates undertook this change in social style. | ||||
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Publisher | Taylor & Francis | Place of Publication | Editor | ||
Language | Summary Language | Original Title | |||
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Series Volume | Series Issue | Edition | |||
ISSN | 0301-4460 | ISBN | Medium | ||
Area | Expedition | Conference | |||
Notes | doi: 10.1080/03014460902960289 | Approved | no | ||
Call Number | Equine Behaviour @ team @ | Serial | 6546 | ||
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Author | McGreevy, P.D.; McLean, A.N. | ||||
Title | Punishment in horse-training and the concept of ethical equitation | Type | Journal Article | ||
Year | 2009 | Publication | Journal of Veterinary Behavior | Abbreviated Journal | J. Vet. Behav. |
Volume | 4 | Issue | 5 | Pages | 193-197 |
Keywords | conditioning; welfare; ethical equitation; horse; punishment; training | ||||
Abstract | By definition, punishment makes a response less likely in the future. Because horses are largely trained by negative reinforcement, they are susceptible to inadvertent punishment. Delays in the release of pressure can make desirable responses less likely and thus punish them. This study examines the correct use of negative reinforcement and identifies a continuum between poorly timed negative reinforcement and punishment. It explores some of the problems of non-contingent punishment and the prospect of learned helplessness and experimental neurosis. It concludes by introducing the concept of ethical equitation. | ||||
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ISSN | 1558-7878 | ISBN | Medium | ||
Area | Expedition | Conference | |||
Notes | Approved | no | |||
Call Number | Equine Behaviour @ team @ | Serial | 6599 | ||
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Author | Niederhöfer, S. | ||||
Title | Stressbelastung bei Pferden in Abhängigkeit des Haltungssystems | Type | Manuscript | ||
Year | 2009 | Publication | Abbreviated Journal | ||
Volume | Issue | Pages | |||
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Abstract | Pferdegerechte Haltungssysteme spielen bei der heutigen Nutzung des Freizeit- oder Sportpartners Pferd eine wichtige Rolle, da naturnahe Haltungsbedingungen nur in seltenen Fällen zu realisieren sind. Sämtliche Aufstallungsformen müssen als Kompromiss angesehen werden und bieten somit Vor- und Nachteile. Die vorliegende Untersuchung verfolgte den Zweck, die Stressbelastung von Pferden in verschiedenen Haltungssystemen zu erfassen und vergleichend zu beurteilen. Während der von Mai 2006 bis Juli 2007 durchgeführten Versuche wurden 24 zwei- bis dreijährige Hannoveranerstuten für jeweils 4 Wochen in insgesamt 6 verschiedenen Haltungsformen aufgestallt. Die Haltungsvarianten beinhalteten die Einzelbox (Variante 1), die Einzelbox mit einem frei zugänglichem Paddock (Variante 2), die gemeinsame Haltung von zwei Pferden in zwei Boxen und einem angeschlossenen frei zugänglichem Auslauf (Variante 3) und die Gruppenhaltung von 6 Pferden in einer Mehrraumauslaufhaltung (Variante 4 – 6). Die Haltungsvariante 4 differierte von den Varianten 5 und 6 durch seinen ungegliederten Liegebereich. In den Variante 5 und 6 wurde der Liegebereich der Gruppenhaltung durch eine über die halbe Breite reichende Trennwand in zwei Bereiche unterteilt. Die Trennwand befand sich in Haltungsvariante 5 im rechten Winkel an die Außenwand grenzend, während sie in Variante 6 an der der Stallgasse zugewandten Seite des Liegebereichs aufgestellt wurde. Um eine Vergleichbarkeit mit einem Reitpferd zu schaffen, wurden alle Pferde in allen Haltungssystemen täglich für circa eine Stunde in einer Freilaufanlage bewegt. Die Stressbelastung wurde mittels der Messung der Herzfrequenzvariabilität (Parameter pNN50 und SD1) und der Bestimmung fäkaler Cortisolmetaboliten erfasst. Zusätzlich wurden Videoauswertungen hinsichtlich der Beobachtung von Verhaltensauffälligkeiten in den Haltungsvarianten 1 und 2 durchgeführt. Die durchschnittlich niedrigste Stressbelastung erfuhren die Pferde durch die Haltungsvarianten 4 (pNN50: 46,32 %, SD1:158,58 ms, Cortisolmetaboliten: 21,01nmol/kg Kot) und 6 (pNN50: 47,1 %, SD1: 144,62 ms, Cortisolmetaboliten: 21,01 nmol/kg Kot). Die 141 Auswertung der pNN50- und Cortisolmetabolitenwerte ergab die größte Stressbelastung der Pferde in den Varianten 1 (pNN50: 42,81 %, SD1: 134,52 ms, Cortisolmetaboliten: 28,56 nmol/kg Kot) und 3 (pNN50: 42,41 %, SD1: 135,36, Cortisolmetaboliten: 28,60 nmol/kg Kot). Die Auswertung der SD1-Werte zeigte zusätzlich noch eine hohe Stressbelastung der Pferde in der Variante 5 (pNN50: 44,83 %, SD1: 119,24 ms, Cortisolmetaboliten: 27,18 nmol/kg Kot). Die Haltungsvariante 2 (pNN50: 45,77 %, SD1: 144,25 ms, Cortisolmetaboliten: 27,59 nmol/kg Kot) beziehungsweise die Varianten 2 und 5 (bei der Betrachtung der pNN50- und der Cortisolmetabolitenwerte) verursachten im Durchschnitt eine mittlere Stressbelastung. Teilweise waren die Unterschiede jedoch zu gering um die Signifikanzgrenze zu überschreiten. Die Betrachtung der einzelnen Pferde und der Pferdegruppen ergab große interindividuelle Unterschiede und deutliche gruppenspezifische Gemeinsamkeiten. Die Position eines Tieres in der Rangordnung hatte in diesen Untersuchungen bei der Betrachtung der Mittelwerte keinen Einfluss auf die Stressbelastung in Abhängigkeit der Haltungsvariante. Vielmehr zeigten sich auch hier deutliche individuelle Unterschiede in der Stressanfälligkeit und den Vorlieben der einzelnen Pferde bezüglich der verschiedenen Haltungssysteme. Die Analyse der Videoaufzeichnungen ergab, dass mehrere Pferde Kreisbewegungen in der Einzelbox ohne Auslauf (Variante 1) zeigten, während in der Variante 2 (Paddockbox) kein Pferd durch Kreisbewegungen auffiel. Andere Verhaltensauffälligkeiten oder gar Verhaltensstörungen wurden nicht beobachtet. Bei der Auswertung der Aufenthaltshäufigkeit und der Aufenthaltesdauer in den 4 Boxenquadranten zeigten sich einige Pferde sehr aktiv, was ein Hinweis auf eventuelle Unruhe oder Nervosität sein kann, während andere Pferde im Vergleich zum Gruppendurchschnitt sehr ruhig wirkten, da sie sich in der Box kaum bewegten und über lange Zeitabschnitte in einem Quadranten standen. Obwohl die Gruppenhaltung für die Mehrzahl der Pferde eine geringere Stressbelastung bedeutete und auch hinsichtlich des Bewegungs- und Sozialverhaltens am artgerechtesten einzustufen ist, sollte für jedes Pferd individuell unter Berücksichtigung seines Alters, seiner Rasse, seines Nutzungsgrades, aber vor allem seines Charakters und seiner Erfahrungen im Sozialverhalten ein passendes großzügig bemessenes Haltungssystem ermittelt werden, um 142 die durch das Haltungssystem ausgeübte Stressbelastung zu minimieren und das Wohlbefinden der Pferde zu steigern. |
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Corporate Author | Thesis | Ph.D. thesis | |||
Publisher | Tierärztliche Hochschule Hannover | Place of Publication | Hannover | Editor | |
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Notes | Approved | no | |||
Call Number | Equine Behaviour @ team @ | Serial | 6607 | ||
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Author | Outram, A.K.; Stear, N.A.; Bendrey, R.; Olsen, S.; Kasparov, A.; Zaibert, V.; Thorpe, N.; Evershed, R.P. | ||||
Title | The Earliest Horse Harnessing and Milking | Type | Journal Article | ||
Year | 2009 | Publication | Science | Abbreviated Journal | |
Volume | 323 | Issue | 5919 | Pages | 1332-1335 |
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Abstract | Horse domestication revolutionized transport, communications, and warfare in prehistory, yet the identification of early domestication processes has been problematic. Here, we present three independent lines of evidence demonstrating domestication in the Eneolithic Botai Culture of Kazakhstan, dating to about 3500 B.C.E. Metrical analysis of horse metacarpals shows that Botai horses resemble Bronze Age domestic horses rather than Paleolithic wild horses from the same region. Pathological characteristics indicate that some Botai horses were bridled, perhaps ridden. Organic residue analysis, using δ13C and δD values of fatty acids, reveals processing of mare's milk and carcass products in ceramics, indicating a developed domestic economy encompassing secondary products. | ||||
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Notes | Approved | no | |||
Call Number | Equine Behaviour @ team @ | Serial | 6620 | ||
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Author | Schultheiss, O.C.; Riebel, K.; Jones, N.M. | ||||
Title | Activity inhibition: A predictor of lateralized brain function during stress? | Type | Journal Article | ||
Year | 2009 | Publication | Neuropsychology | Abbreviated Journal | |
Volume | 23 | Issue | 3 | Pages | 392-404 |
Keywords | activity inhibition; laterality; stress; content analysis; self-regulation; mood states; affective stimuli; perceptual laterality; motor laterality | ||||
Abstract | The authors tested the hypothesis that activity inhibition (AI), a measure of the frequency of the word “not” in written material, marks a propensity to engage functions of the right hemisphere (RH) and disengage functions of the left hemisphere (LH), particularly during stress. Study 1 and Study 2 showed that high AI predicts faster detection of stimuli presented to the RH, relative to the LH. Study 2 provided evidence that the AI-laterality effect is specific to perceptual, but not motor, laterality and that it is particularly strong in individuals with low mood, but absent in individuals in a positive mood state. Study 3 showed that negative affective stimuli prime the AI-laterality effect more strongly than positive affective stimuli. Findings from Study 4 suggest that situationally induced frustration (losing a contest), in conjunction with high AI, leads to increased attentional laterality. The present findings substantially bolster the construct validity of AI and contribute to a better understanding of earlier findings linking AI to physiological stress responses, immune system functioning, alcohol abuse, and nonverbal behavior. (PsycINFO Database Record (c) 2010 APA, all rights reserved) | ||||
Address | Schultheiss, Oliver C.: Institute of Psychology, Friedrich-Alexander University, Kochstrasse 4, Erlangen, Germany, 91054, oliver.schultheiss@psy.phil.uni-erlangen.de | ||||
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Publisher | US: American Psychological Association | Place of Publication | Editor | ||
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ISSN | 1931-1559 (Electronic); 0894-4105 (Print) | ISBN | Medium | ||
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Notes | Approved | no | |||
Call Number | Equine Behaviour @ team @ 2009-05986-011 | Serial | 5382 | ||
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Author | Veen, P.; Jefferson, R.; de Smidt, J.; van der Straaten, J. | ||||
Title | Grasslands in Europe of high nature value | Type | Book Whole | ||
Year | 2009 | Publication | Abbreviated Journal | ||
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Publisher | Brill | Place of Publication | The Netherlands | Editor | |
Language | No Linguistic Content | Summary Language | Original Title | ||
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ISSN | ISBN | 9789050113168 9050113168 9789004278103 9004278109 | Medium | ||
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Notes | Approved | no | |||
Call Number | Equine Behaviour @ team @ 6066883015 | Serial | 6561 | ||
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Author | Boersma, P.; Weenink, D. | ||||
Title | Praat: doing phonetics by computer | Type | Book Whole | ||
Year | 2009 | Publication | Abbreviated Journal | ||
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Notes | Approved | no | |||
Call Number | Equine Behaviour @ team @ Boersma2009 | Serial | 6496 | ||
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Author | Dong, D.; Jones, G.; Zhang, S. | ||||
Title | Dynamic evolution of bitter taste receptor genes in vertebrates | Type | Journal Article | ||
Year | 2009 | Publication | BMC Evolutionary Biology | Abbreviated Journal | |
Volume | 9 | Issue | 1 | Pages | 12 |
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Abstract | Sensing bitter tastes is crucial for many animals because it can prevent them from ingesting harmful foods. This process is mainly mediated by the bitter taste receptors (T2R), which are largely expressed in the taste buds. Previous studies have identified some T2R gene repertoires, and marked variation in repertoire size has been noted among species. However, the mechanisms underlying the evolution of vertebrate T2R genes remain poorly understood. | ||||
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ISSN | 1471-2148 | ISBN | Medium | ||
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Notes | Approved | no | |||
Call Number | Equine Behaviour @ team @ Dong2009 | Serial | 6637 | ||
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