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Author |
Siegel, J.M. |
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Title |
Do all animals sleep? |
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2008 |
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Trends in Neurosciences |
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31 |
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4 |
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208-213 |
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Some animals never exhibit a state that meets the behavioral definition of sleep. Others suspend or greatly reduce ‘sleep’ behavior for many weeks during the postpartum period or during seasonal migrations without any consequent ‘sleep debt.’ Rats die from one form of sleep deprivation, but sleep loss has not been shown to cause death in well-controlled studies in other vertebrate species. Some marine mammal species do not show evidence for REM sleep, and convincing evidence for this state in reptiles, fish and insects is lacking. The enormous variation in the nature of rest and sleep states across the animal kingdom and within the mammalian class has important implications for understanding the evolution and functions of sleep. |
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Equine Behaviour @ team @ |
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5613 |
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Roth, L.S.V.; Balkenius, A.; Kelber, A. |
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Title |
The Absolute Threshold of Colour Vision in the Horse |
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Journal Article |
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2008 |
Publication |
PLoS ONE |
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PLoS ONE |
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3 |
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11 |
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e3711 EP - |
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<p>Arrhythmic mammals are active both during day and night if they are allowed. The arrhythmic horses are in possession of one of the largest terrestrial animal eyes and the purpose of this study is to reveal whether their eye is sensitive enough to see colours at night. During the day horses are known to have dichromatic colour vision. To disclose whether they can discriminate colours in dim light a behavioural dual choice experiment was performed. We started the training and testing at daylight intensities and the horses continued to choose correctly at a high frequency down to light intensities corresponding to moonlight. One Shetland pony mare, was able to discriminate colours at 0.08 cd/m2, while a half blood gelding, still discriminated colours at 0.02 cd/m2. For comparison, the colour vision limit for several human subjects tested in the very same experiment was also 0.02 cd/m2. Hence, the threshold of colour vision for the horse that performed best was similar to that of the humans. The behavioural results are in line with calculations of the sensitivity of cone vision where the horse eye and human eye again are similar. The advantage of the large eye of the horse lies not in colour vision at night, but probably instead in achromatic tasks where presumably signal summation enhances sensitivity.</p> |
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Public Library of Science |
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Equine Behaviour @ team @ |
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5625 |
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Author |
Hoffmann; G. |
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Title |
Bewegungsaktivität und Stressbelastung bei Pferden in Auslaufhaltungssystemen mit verschiedenen Bewegungsangeboten |
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2008 |
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Dissertation |
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Pferdehaltungssysteme mit angrenzenden Ausläufen gelten als eine sehr tiergerechte
Haltungsform, da sie den Tieren eine gewisse Bewegungsmöglichkeit
bieten. Ziel der vorliegenden Untersuchung war es, zu erfassen, ob der angrenzende
Auslauf selbst einen ausreichenden Anreiz zur Bewegung darstellt und wie sich verschiedene
Bewegungs- und Platzangebote auf die Bewegungsaktivität von Pferden
in einer Gruppen-Auslaufhaltung auswirken. Zudem wurde ermittelt, welche Auswirkung
die Bewegungsform bzw. –intensität auf das Wohlbefinden der Tiere hat.
Der Großteil der in Deutschland gehaltenen Pferde verbringt die meiste Zeit des
Tages im Stall, obwohl mittlerweile bekannt ist, dass Pferde unter natürlichen
Haltungsbedingungen 12 bis 16 Stunden des Tages in Bewegung verbringen. Der
Optimierung der Stallhaltungssysteme gilt daher ein besonderes Interesse.
Zu diesem Zweck wurden von September 2004 bis Oktober 2005 Versuche mit 24
Warmblutstuten im Alter von 1½ bis 3½ Jahren in Einzel- und Gruppen-
Auslaufhaltungssystemen durchgeführt. Jeweils sechs Pferde bildeten eine Versuchsgruppe.
In jeder Gruppe fanden fünf Varianten von einer ca. dreiwöchigen
Dauer statt. Die Gruppenhaltung wurde dabei durch drei unterschiedliche Zusatzbewegungsangebote
(2 Std. Weide / Tag, 2 Std. unbegrünte Koppel / Tag, 1 Std. Freilauf-
Führanlage / Tag) ergänzt. In der Einzel-Auslaufhaltung (Box mit 45 m²-großem
angrenzenden Auslauf) und in einer Versuchsvariante der Gruppenhaltung bekamen
die Pferde hingegen keine zusätzliche Bewegung außerhalb des Stallhaltungssystems
angeboten. Das Gruppenhaltungssystem selbst war durch die räumliche
Trennung der Funktionsbereiche (Liegen, Fressen, Trinken, Bewegen) gekennzeichnet
und der angrenzende Auslauf war 270 m² groß. In einer zusätzlichen Versuchsphase
fand in der Gruppenhaltung eine Erweiterung des permanent zugänglichen
Auslaufs auf insg. 540 m² statt.
Die Bewegungsaktivität wurde mit Pedometern erfasst, die an jeweils einem Hinterbein
der Pferde befestigt wurden und ergänzend fand eine Analyse von Videoaufzeichnungen
statt. Zur Beurteilung der Stressbelastung fanden Messungen der Herz192
Zusammenfassung
frequenzvariabilität (Parameter HF und SD2) und der fäkalen Cortisolmetabolitenkonzentration
statt.
Die Auswertung des Bewegungsverhaltens ergab, dass eine zusätzliche zweistündige
freie Bewegung der Pferdegruppe auf einer Weide zu einer deutlichen
Steigerung der durchschnittlichen Bewegungsaktivität (149,6 Min. / Tag) führt,
ebenso wie eine einstündige Bewegung in einer Führanlage (173,0 Min. / Tag). Eine
unbegrünte Koppel regte die Pferde der Gruppenhaltung hingegen nicht zu vermehrter
Bewegung an (131,6 Min. / Tag), sondern bewirkte z. T. sogar eine Abnahme
der Bewegungsaktivität. In der Gruppen-Auslaufhaltung ohne zusätzliches Bewegungsangebot
war die Bewegungsaktivität ebenfalls gering (125,8 Min / Tag) und
während der Einzel-Auslaufhaltung ohne Zusatzbewegung zeigten die Pferde die
geringste Bewegungsaktivität (102,3 Min. / Tag).
Bei der alleinigen Analyse der Bewegungszeit im Stallhaltungssystem war kein signifikanter
Einfluss der zusätzlichen Bewegung außerhalb des Stallsystems auf die
übrige Fortbewegung feststellbar.
Auch eine Vergrößerung des an den Stall angrenzenden Auslaufs im Gruppenhaltungssystem
hatte keinen steigernden Einfluss auf das Bewegungsverhalten der
Pferde.
Die Stressbelastung der Pferde war in den Varianten der Gruppenhaltung mit zweistündigem
Weidegang (SD2: 82,9 ms; Cortisolmetaboliten: 29,0 nmol / kg Kot) sowie
der einstündigen Bewegung in einer Freilauf-Führanlage (SD2: 99,2 ms; Cortisolmetaboliten:
27,7 nmol / kg Kot) am geringsten. Die Untersuchungen zeigten eine
Stresszunahme in der Gruppenhaltung mit zweistündigem Auslauf auf einer unbegrünten
Koppel ohne Futterangebot (SD2: 101,3 ms; Cortisolmetaboliten:
39,6 nmol / kg Kot) sowie in der Variante der Gruppenhaltung ohne zusätzliches Bewegungsangebot
(SD2: 113,3 ms; Cortisolmetaboliten: 38,4 nmol / kg Kot). Dem
Mittelwert der Gruppe nach zu folgern hatten die Pferde während der Einzelhaltung
ohne Zusatzbewegung eine sehr große Stressbelastung (SD2: 123,8 ms; Cortisolmetaboliten:
37,5 nmol / kg Kot). Ein Vergleich der Gruppen- und Einzelhaltung hinsichtlich
der Herzfrequenzvariabilität hat jedoch gezeigt, dass insg. 70 % der Pferde
während der Haltung in einer Gruppe weniger Stress empfinden. Es gab aber auch
Zusammenfassung 193
Pferde (30 %), die in der Einzelhaltung eine abnehmende Stressbelastung zeigten,
wobei hier der Einfluss der Rangordnung eine entscheidende Rolle zu spielen
scheint.
Durch die Auswertung mehrerer Messparameter (sowohl für Stress- als auch für Bewegungsverhalten)
werden gleichgerichtete Tendenzen bei den Versuchsvarianten
deutlich, allerdings ist eine eindeutige Gewichtung der Parameter nicht möglich.
Somit ist die methodische Vorgehensweise dieser Untersuchung sehr positiv und als
notwendig anzusehen, da die Messdaten auch immer gewissen Schwankungen
durch externe Einflüsse unterliegen.
Allgemein ist festzuhalten, dass Auslaufhaltungssysteme zwar eine gewisse
Anregung zur Bewegung bieten, aber mit maximal vier Stunden (insg. 62 – 248 Min.)
Bewegung pro Tag war der tägliche Anteil an Bewegung sehr viel geringer als
beispielsweise bei Pferden in freier Wildbahn oder ganzjähriger Weidehaltung. Somit
deckt ein Auslaufhaltungssystem trotz getrennter Funktionsbereiche und eines
großen Auslaufs nicht den Bewegungsbedarf der Pferde, wenn keine zusätzlichen
Bewegungsanreize und –möglichkeiten angeboten werden.
Eine zusätzliche Bewegung von Pferden ist nicht nur zur Gesunderhaltung des
Bewegungsapparates und der Körperfunktionen notwendig, sondern auch um das
Wohlbefinden und die Ausgeglichenheit der Pferde zu steigern.
[Horse husbandry systems with close-by discharge are considered to be a very livestock-
friendly housing form, as they offer a certain movement opportunity for the
animals. The aim of the present study was to examine how different movement and
space offerings affect the movement activities of horses in a group horse husbandry
with close-by discharge, and whether the discharge provides itself an adequate
incentive for movement. The impact that the form or rather intensity of movement has
on the wellbeing of the animals was also established.
Most of the horses held in Germany spend most of the day in the stable, although it is
meanwhile known that horses under natural housing conditions are 12 to 16 hours of
the day in motion. Therefore the improvement of stable housing systems applies a
special interest.
For this purpose, 24 warmblood mares, aged from 1½ to 3½ years, were studied in
single and group discharge husbandry systems from September 2004 until October
2005. Six horses formed an experimental group. In every group five variants of approximately
three weeks were proceeded. Thereby the group husbandry was supplemented
with three different additional movement opportunities (2 h pasture / day,
2 h non-grassy pasture land / day, 1 h free range horse walker / day). In the single
discharge husbandry (single box with 45 sq. m-large close-by discharge) and in one
experimental variant of the group husbandry got the horses, however, offered no additional
movement outside the husbandry system. The group husbandry system itself
was marked by the spatial division of the functional areas (lying, eating, drinking,
moving) and the close-by discharge measured 270 sq. m. In an additional phase of
the study, and expansion of the permanently accessible close-by discharge to
540 sq. m was found.
The movement activity was documented with pedometers attached respectively to
one hind leg of the horse and a supplementary analysis of video documentation. To
evaluate the stress exposure measurements of heart frequency variability (parameters
HF and SD2) and of the faecal cortisol metabolite concentration were performed.
Summary 195
The interpretation of the movement behaviour showed that additional two hours of
free movement on a pasture led to a significant increase in the average movement
activity (149.6 min / day), as well as one hour movement in a horsewalker did
(173.0 min / day). The non-grassy pasture land, however, didn’t inspire the horses of
the group husbandry to increased movement (131.6 min / day), but sometimes even
caused a decrease in movement activity. In the group discharge husbandry without
additional movement opportunities the movement activity was also low
(125.8 min / day), and during the single discharge husbandry without additional
movement the horses showed the least movement activity (102.3 min / day).
In analysing only the movement time in the stable system was no significant impact
of the additional movement outside the housing system to the rest of locomotion
ascertainable.
As well an expansion of the close-by stable discharge in the group husbandry system
had no increasing influence on the movement behaviour of the horses.
The stress exposure of the horses was least in the variations of group husbandry
with two hours on a pasture (SD2: 82.9 ms; cortisol metabolites: 29.0 nmol / kg faeces)
as well as one hour of movement in a free range horse walker (SD2: 99.2 ms;
cortisol metabolites: 27.7 nmol / kg faeces). The studies showed a rise in stress in
group husbandry with two hours of movement on a non-grassy pasture land without
feeding opportunity (SD2: 101.3 ms; cortisol metabolites: 39.6 nmol / kg faeces) as
well as in the variation of the group husbandry without additional movement offerings
(SD2: 113.3 ms; cortisol metabolites: 38.4 nmol / kg faeces). Judging from the mean
of the group the horses had a very high stress exposure in the variation of the single
husbandry without additional movement offerings (SD2: 123.8 ms; cortisol metabolites:
37.5 nmol / kg faeces). But a comparison of the group and single husbandry in
terms of the heart frequency variability showed that alltogether 70 % of the horses
experienced less stress if hold in a group. However, some horses (30 %) showed
reducing stress in the single husbandry, whereas here the influence of social hierarchy
seems to play a decisive role.
196 Summary
In consequence of the examination of several measuring parameters (both for stressand
for movement behaviour) parallel aligned tendencies become apparent in the
experimental variants, however, is a unique weighting of the parameters not possible.
Thus, the methodological approach of this study is to be regarde as very positive and
necessary, since the data always vary with some fluctuations by external influences.
In general it can be established that discharge husbandry systems offer some incentive
for the horse to move, but with a maximum of four hours (overall 62 – 248 min) of
movement per day, the daily proportion of movement was much less than, for example,
in the case of wild horses or year-round pasture keeping. Thus, if no additional
movement incentives and possibilities are offered, the discharge husbandry system
doesn’t cover the movement needs of the horse despite separate functional areas
and a large outside discharge.
Additional movement is not only necessary to keep the musculoskeletal system and
bodily functions of the horse healthy, but also to ensure the horse’s well being and
mental balance.] |
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Equine Behaviour @ team @ |
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5660 |
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Author |
Knubben,; J. M. Knubben; Gygax,; L. Gygax; Auer,; J. Auer; Fürst,; A. Fürst; Stauffacher,; Dr. M. Stauffacher |
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Title |
Häufigkeiten von Erkrankungen und Verletzungen in der Schweizer Pferdepopulation |
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Journal Article |
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2008 |
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Schweizer Archiv für Tierheilkunde |
Abbreviated Journal |
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150 |
Issue |
8 |
Pages |
399-408 |
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Bei einer für die Schweiz repräsentativ und zufällig ausgewählten Stichprobe von 2912 Pferden und Ponys wurden mittels Fragebogen Daten zum aktuellen Gesundheitszustand und zum Auftreten von Erkrankungen und Verletzungen während der vergangenen 12 Monate erfasst. 718 Pferde (24.7%) wurden im Erfassungszeitraum wegen 897 gesundheitlichen Problemen einem Tierarzt vorgestellt. Orthopädische und traumatische Fälle machten den grössten Anteil aus (41.5%), gefolgt von Erkrankungen des Gastrointestinal- (27.1%) und des Respirationstrakts (14.0%). Die Hälfte der Lahmheiten entstand als unmittelbare Folge einer Verletzung. Die Verletzungen waren assoziiert mit Weidegang/Auslauf (38.1%), Schläge/Bissen durch Artgenossen (21.6%), Stall (7.8%), Gelände (13.4%), Training (3.5%), Wettkampf (3.5%), Transport (3.0%) oder mit anderen Umständen (9.1%). In 26.5% der Kolikfälle wurde im Monat vor der Erkrankung Futterumstellung vorgenommen. Bei den Atmungserkrankungen wurde in 13.8% die gleiche Krankheit auch bei anderen Pferden im Stall diagnostiziert. Bei 8.1% aller Fälle erfolgte eine Operation, 6.7% waren mit einem mehrtägigem Klinikaufenthalt verbunden. Bei 25.6% aller tiermedizinisch diagnostizierten Fälle wurden ergänzend oder ausschliesslich komplementärmedizinische Therapiemethoden eingesetzt. |
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Equine Behaviour @ team @ |
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5761 |
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Author |
Streit, S.; Zeitler-Feicht, M. H.; Dempfle, L. |
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Gibt es in der Gruppenhaltung von Pferden bei der Abruffütterung am Automaten mehr Auseinandersetzungen als bei der Fütterung in Fressständen? [Keeping horses in groups, are there more confrontations when feeding is done with automatic feeding systems than with feeding stalls?] |
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2008 |
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KTBL-Schriften |
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471 |
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Das Droh- und Meideverhalten von 270 Pferden wurde im Fressbereich von 10 Offenlaufställen
mit Fressständen und 11 Offenlaufställen mit computergesteuerten Abrufstationen
anhand von visuellen kontinuierlichen Direktbeobachtungen erfasst. Diese erfolgten je Betrieb
über einen 24-Stunden-Tag, der nach dem Tortenstückverfahren (6x4 Stunden) zusammengesetzt
war.
Insgesamt wurden 6297 agonistische Verhaltensweisen in, vor und hinter den
Fütterungseinrichtungen registriert (Meiden 40,6 %, Verdrängen 12,8 %, Beißen/ Hinterhandschlag/
Angehen 12,7 % und Drohen/ Drohbeißen/ Hinterhanddrohen 33,9 %). In den
Futterstationen wurden 22,5 % dieses Verhaltens beobachtet, vor und hinter den Futterstationen
77,5 %. Bei den Betrieben mit Fressständen fanden 31 % der agonistischen Verhaltensweisen
in den Ständen statt, bei den Betrieben mit Abruffütterung 21 %.
Der Einfl uss des einzelnen Betriebes (innerhalb Fütterungssystem) auf die agonistischen
Verhaltensweisen vor und hinter den Fütterungseinrichtungen war signifi kant. Die Auswertung
ergab, dass Drohgesten im Wartebereich von Abrufstationen häufi ger auftreten
als in dem von Fressständen. Demgegenüber können Pferde in Abrufstationen ungestörter
fressen. Insgesamt betrachtet war jedoch die Anzahl an sozionegativen Interaktionen im
Bereich der Futtereinrichtungen bei beiden Fütterungssystemen gering. Die agonistischen
Verhaltensweisen wurden zusätzlich noch von der Heumenge und dem Konstitutionstyp
beeinfl usst.
Der Betrieb erwies sich als maßgeblicher Einfl ussfaktor. Als Resümee ergibt sich, dass
bei ordnungsgemäßer Gruppenhaltung mit fachgerechtem Management beide Fütterungssysteme
für Pferde im Offenlaufstall geeignet sind.
[The threatening and avoiding behaviour of 270 horses living in run-out sheds was observed
at 10 stables with feeding stalls and at 11 stables with automatic feeding systems for hay
and concentrates. Every group of horses was observed on five succeeding days visually
and immediately for 6 sessions, each of 4 hours. These 6 slices form together 24 hours, a
complete day.
Altogether, 6297 agonistic behaviour patterns were registered in front of, inside and
behind the feeding stations (avoiding behaviour 40.6 %, edging out of others 12.8 %,
Auseinandersetzungen an automatischer Abruffütterung und Fressständen
KTBL-Schrift 471 79
biting/rear leg kicking/charging 12.7 % und threatening/biting threats/rear leg kicking
threats 33.9 %). 22.5 % of these types of behaviour were recorded in the feeding stations,
77.5 % together in front and behind of these. In the stables with feeding stalls there were
31 % of the observed threatening gestures inside the feeding stations, in the stables with
automatic feeders only 21 %.
The individual farm showed signifi cant infl uence on the modes of agonistic behaviour
in front and behind the feeding facilities. Threatening gestures happen more often in the
waiting area of automatic feeders than in that of feeding stalls. On the other hand horses
in computer controlled systems will be less disturbed at eating. All together the number
of negative interactions in the feeding area at both feeding systems was relatively low.
In addition the agonistic behaviour was infl uenced by the quantity of hay and the constitutional
typ of the horses.
Because of the management of the individual stable exercises the most substantial
infl uence on the behaviour of the horses, it can be said, that, correct group keeping with
professional management provided, both feeding systems are suitable for horses in run-in
sheds.] |
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5763 |
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Whitehead , H. |
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Title |
Analyzing Animal Societies. Quantitative Methods for Vertebrate Social Analysis |
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2008 |
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University of Chicago Press |
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chicago |
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EAN: 9780226895246 |
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5838 |
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Maros, K.; Dóka, A.; Miklósi, Á. |
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Behavioural correlation of heart rate changes in family dogs |
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2008 |
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Applied Animal Behaviour Science |
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Appl. Anim. Behav. Sci. |
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109 |
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2 |
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329-341 |
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Fourteen dogs (7 males and 7 females) were tested for their heart rate (HR) and heart rate variability (HRV) responses in different activities and environmental challenges while their movement was controlled. First, we wanted to compare the dogs? cardiac responses in different body positions (lying, sitting and standing) and during slow walking to reveal their possible influence on HR and HRV. Second, we tested the HR response during an attentive state when the dog was gazing at its favourite toy while remaining in a steady body position. Finally we investigated the heart activity during separation from the owner. We also analysed the individual differences and the influence of gender on the heart responses. We found that the HR increased during periods of increased activity (walking) and was lowest during lying, while it did not differ between sitting and standing. At the same time no changes in HRV were found in the case of different body positions and walking. In contrast, HRV significantly increased when dogs oriented towards their favourite toy, and we found a distinct individual characteristic HR change in this situation compared to the similar body position without the toy being shown. Interestingly during separation from the owner the HR did not increase, but when a strange person was petting the dog, a significant increasing effect was seen in the HR. However the HRV increased only when the petting was discontinued. In general, large individual variation was found with regard to the HR and HRV, while gender did not influence the cardiac activity of the dogs.These results show that body position affected HR significantly in dogs. Further it seems that HRV could be a good indicator of the dog's attentive state. Thus in future studies both the physical and cognitive factors should be given more attention when HR or HRV is investigated as a dependent variable. |
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Elsevier |
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doi: 10.1016/j.applanim.2007.03.005 |
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Equine Behaviour @ team @ |
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5846 |
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Yorke, J.; Adams, C.; Coady, N. |
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Title |
Therapeutic Value of Equine-Human Bonding in Recovery from Trauma |
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2008 |
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Anthrozoös |
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Anthrozoös |
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21 |
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1 |
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17-30 |
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ABSTRACTAlthough most human-animal bond research has focused on relationships between humans and pets, animals have been used for therapeutic purposes in a variety of settings. Therapeutic riding programs have demonstrated a positive impact on quality of life for people with disabilities. Equine-facilitated psychotherapy is a promising approach to address self-esteem, depression, and other emotional or psychological problems. Restoration of the trauma victim's capacity for recovery hinges on provision of safety and development of trust, self-esteem, and self-efficacy. Thus, recovery from trauma represents an ideal context for exploring the therapeutic impact of equine?human relationships. The six participants in this study recognized that their pre-existing relationships with horses were therapeutic during recovering from trauma, defined as sufficient to have caused significant change in the participant's life. Semi-structured interviews and video-tapes of horse?rider interaction were used to describe the nature of the equine?human bond and its contribution to recovery from trauma. The equine?human bonds described by participants have parallels both with important elements of therapeutic alliances between professionals and clients and with the positive impact of relationship factors on client outcome. |
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Routledge |
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0892-7936 |
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doi: 10.2752/089279308X274038 |
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Equine Behaviour @ team @ |
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6033 |
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Webster, M.M.; Laland, K.N. |
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Social learning strategies and predation risk: minnows copy only when using private information would be costly |
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2008 |
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Proc Biol Sci |
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Proc. R. Soc. Lond. B |
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275 |
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1653 |
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2869-2876 |
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Animals can acquire information from the environment privately, by sampling it directly, or socially, through learning from others. Generally, private information is more accurate, but expensive to acquire, while social information is cheaper but less reliable. Accordingly, the 'costly information hypothesis' predicts that individuals will use private information when the costs associated with doing so are low, but that they should increasingly use social information as the costs of using private information rise. While consistent with considerable data, this theory has yet to be directly tested in a satisfactory manner. We tested this hypothesis by giving minnows (Phoxinus phoxinus) a choice between socially demonstrated and non-demonstrated prey patches under conditions of low, indirect and high simulated predation risk. Subjects had no experience (experiment 1) or prior private information that conflicted with the social information provided by the demonstrators (experiment 2). In both experiments, subjects spent more time in the demonstrated patch than in the non-demonstrated patch, and in experiment 1 made fewer switches between patches, when risk was high compared with when it was low. These findings are consistent with the predictions of the costly information hypothesis, and imply that minnows adopt a 'copy-when-asocial-learning-is-costly' learning strategy. |
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Equine Behaviour @ team @ |
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6196 |
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Hoppitt, W.; Laland, K.N. |
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Social processes influencing learning in animals: a review of the evidence |
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2008 |
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Adv Study Behav |
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38 |
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105-165 |
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Equine Behaviour @ team @ Hoppitt2008 |
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