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Author |
Dreschel, N.A.; Granger, D.A. |
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Title |
Methods of collection for salivary cortisol measurement in dogs |
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Journal Article |
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Year |
2009 |
Publication |
Hormones and Behavior |
Abbreviated Journal |
Horm. Behav. |
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Volume |
55 |
Issue |
1 |
Pages |
163-168 |
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Keywords |
Dog; Canine; Salivary cortisol; Methods; Measurement; Stress |
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Abstract  |
Salivary cortisol has been increasingly used as a measure of stress response in studies of welfare, reaction to stress and human–animal interactions in dogs and other species. While it can be a very useful measure, there are a number of saliva collection issues made evident through studies in the human and animal fields which have not been investigated in the canine species. Collection materials and the volume of saliva that is collected; the use of salivary stimulants; and the effect of food contamination can all dramatically impact cortisol measurement, leading to spurious results. In order to further examine the limitations of the collection method and the effects of collection material and salivary stimulant on salivary cortisol levels, a series of clinical, in vitro and in vivo studies were performed. It was found that there is a large amount of inter- and intra-individual variation in salivary cortisol measurement. Beef flavoring of collection materials leads to unpredictable variability in salivary cortisol concentration. Using salivary stimulants such as citric acid also has the potential to affect cortisol concentration measurement in saliva. Hydrocellulose appears to be a useful collection material for salivary cortisol determination. Recommendations for collection materials and use of salivary stimulants are presented. |
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Equine Behaviour @ team @ |
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5560 |
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Author |
Carroll, G.L.; Matthews, N.S.; Hartsfield, S.M.; Slater, M.R.; Champney, T.H.; Erickson, S.W. |
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Title |
The effect of detomidine and its antagonism with tolazoline on stress-related hormones, metabolites, physiologic responses, and behavior in awake ponies |
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Journal Article |
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Year |
1997 |
Publication |
Veterinary surgery : VS : the official journal of the American College of Veterinary Surgeons |
Abbreviated Journal |
Vet Surg |
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Volume |
26 |
Issue |
1 |
Pages |
69-77 |
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Keywords |
Adrenergic alpha-Antagonists/administration & dosage/*pharmacology; Animals; Behavior, Animal/drug effects/physiology; Blood Glucose/metabolism; Blood Pressure/drug effects/physiology; Consciousness/physiology; Dose-Response Relationship, Drug; Drug Interactions; Epinephrine/blood; Fatty Acids, Nonesterified/blood; Female; Heart Rate/drug effects/physiology; Horse Diseases/metabolism/physiopathology/psychology; Horses/blood/metabolism/*physiology; Hydrocortisone/blood; Hypnotics and Sedatives/administration & dosage/*pharmacology; Imidazoles/administration & dosage/*pharmacology; Injections, Intravenous; Male; Norepinephrine/blood; Receptors, Adrenergic, alpha/drug effects/*physiology; Stress/metabolism/physiopathology/veterinary; Time Factors; Tolazoline/administration & dosage/*pharmacology |
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Six ponies were used to investigate the effect of tolazoline antagonism of detomidine on physiological responses, behavior, epinephrine, norepinephrine, cortisol, glucose, and free fatty acids in awake ponies. Each pony had a catheter inserted into a jugular vein 1 hour before beginning the study. Awake ponies were administered detomidine (0.04 mg/kg intravenously [i.v.]) followed 20 minutes later by either tolazoline (4.0 mg/kg i.v.) or saline. Blood samples were drawn from the catheter 5 minutes before detomidine administration (baseline), 5 minutes after detomidine administration, 20 minutes before detomidine administration which was immediately before the administration of tolazoline or saline (time [T] = 0), and at 5, 30, and 60 minutes after injections of tolazoline or saline (T = 5, 30, and 60 minutes, respectively). Compared with heart rate at T = 0, tolazoline antagonism increased heart rate 45% at 5 minutes. There was no difference in heart rate between treatments at 30 minutes. Blood pressure remained stable after tolazoline, while it decreased over time after saline. Compared with concentrations at T = 0, tolazoline antagonism of detomidine in awake ponies resulted in a 55% increase in cortisol at 30 minutes and a 52% increase in glucose at 5 minutes. The change in free fatty acids was different for tolazoline and saline over time. Free fatty acids decreased after detomidine administration. Free fatty acids did not change after saline administration. After tolazoline administration, free fatty acids increased transiently. Tolazoline tended to decrease sedation and analgesia at 15 and 60 minutes postantagonism. Antagonism of detomidine-induced physiological and behavioral effects with tolazoline in awake ponies that were not experiencing pain appears to precipitate a stress response as measured by cortisol, glucose, and free fatty acids. If antagonism of an alpha-agonist is contemplated, the potential effect on hormones and metabolites should be considered. |
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Department of Small Animal Medicine and Surgery, Texas A&M University, College Station, USA |
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0161-3499 |
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PMID:9123816 |
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refbase @ user @ |
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96 |
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Houpt, K.A.; Eggleston, A.; Kunkle, K.; Houpt, T.R. |
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Title |
Effect of water restriction on equine behaviour and physiology |
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Journal Article |
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Year |
2000 |
Publication |
Equine veterinary journal |
Abbreviated Journal |
Equine Vet J |
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Volume |
32 |
Issue |
4 |
Pages |
341-344 |
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Keywords |
Animals; *Behavior, Animal; Blood Proteins/analysis; Energy Intake; Female; Horse Diseases/physiopathology; Horses/*physiology; Osmolar Concentration; Pregnancy; Stress/veterinary; Video Recording; Water Deprivation/*physiology |
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Abstract |
Six pregnant mares were used to determine what level of water restriction causes physiological and/or behavioural changes indicative of stress. Nonlegume hay was fed ad libitum. During the first week of restriction, 5 l water/100 kg bwt was available, during the second week 4 l/100 kg bwt and, during the third week, 3 l/100 kg bwt. Ad libitum water intake was 6.9 l/100 kg bwt; at 3 l/100 kg bwt water intake was 42% of this. Daily hay intake fell significantly with increasing water restriction from 12.9 +/- 0.75 kg to 8.3 +/- 0.54 kg; bodyweight fell significantly for a total loss of 48.5 +/- 8.3 kg in 3 weeks. Daily blood samples were analysed; osmolality rose significantly with increasing water restriction from 282 +/- 0.7 mosmols/kg to 293.3 +/- 0.8 mosmols/kg bwt, but plasma protein and PCV did not change significantly. Cortisol concentrations fell from 8.1 ng/ml to 6.4 ng/ml over the 3 week period. Aldosterone fell from 211.3 +/- 74.2 pg/ml to 92.5 +/- 27.5 pg/ml at the end of the first week. The behaviour of 4 of the 6 mares was recorded 24 h/day for the duration of the study. The only significant difference was in time spent eating, which decreased with increasing water restriction from 46 +/- 3% to 30 +/- 3%. It is concluded that water restriction to 4 l/100 kg bwt dehydrates pregnant mares and may diminish their welfare, but is not life- or pregnancy-threatening. |
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Department of Physiology, College of Veterinary Medicine, Cornell University, Ithaca, New York 14853-6401, USA |
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0425-1644 |
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PMID:10952384 |
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no |
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Call Number |
refbase @ user @ |
Serial |
32 |
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Author |
Bosch, O.J.; Nair, H.P.; Ahern, T.H.; Neumann, I.D.; Young, L.J. |
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Title |
The CRF System Mediates Increased Passive Stress-Coping Behavior Following the Loss of a Bonded Partner in a Monogamous Rodent |
Type |
Journal Article |
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Year |
2008 |
Publication |
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Abbreviated Journal |
Neuropsychopharmacology |
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Volume |
34 |
Issue |
6 |
Pages |
1406-1415 |
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Keywords |
prairie vole; passive stress-coping; forced swim test; tail suspension test; elevated plus-maze; hypothalamo–pituitary–adrenal axis |
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Abstract |
Social relationships significantly influence physiology and behavior, including the hypothalamo–pituitary–adrenal axis, anxiety, and mental
health. Disruption of social bonds through separation or death often results in profound grieving, depression, and physical illness. As the
monogamous prairie vole forms enduring, selective pair bonds with the mating partner, they provide an animal model to study the
physiological consequences of pair bonding and, thus, the loss of the bonded partner. Male prairie voles were paired with a novel female
or male sibling. After 5 days, half of the males of each group were separated from the partner. Elevated plus-maze, forced swim, and tail
suspension tests were used to assess anxiety-like and passive stress-coping behaviors indicative of depressive-like behavior. Following 4
days of separation from the female but not the male partner, experimental males displayed increased passive stress-coping. This effect
was abolished by long-term intracerebroventricular infusion of a nonselective corticotropin-releasing factor (CRF) receptor antagonist
without disrupting the bond itself. Both CRF type 1 and 2 receptors were involved in the emergence of passive stress-coping behavior.
Furthermore, pairing with a female was associated with elevated CRF mRNA in the bed nucleus of the stria terminalis, and partner loss
elicited a pronounced increase in circulating corticosteroid and adrenal weight. We speculate that the CRF system may mediate an
aversive affect following separation from the female partner, which may facilitate proximity seeking between the pair-bonded individuals.
Hence, the prairie vole model may provide insights into brain mechanisms involved in the psychopathological consequences of partner
loss. |
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American College of Neuropsychopharmacology |
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0893-133x |
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Equine Behaviour @ team @ |
Serial |
5731 |
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Author |
Overli, O.; Korzan, W.J.; Hoglund, E.; Winberg, S.; Bollig, H.; Watt, M.; Forster, G.L.; Barton, B.A.; OVerli, E.; Renner, K.J.; Summers, C.H. |
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Title |
Stress coping style predicts aggression and social dominance in rainbow trout |
Type |
Journal Article |
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Year |
2004 |
Publication |
Hormones and Behavior |
Abbreviated Journal |
Horm Behav |
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Volume |
45 |
Issue |
4 |
Pages |
235-241 |
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Keywords |
Adaptation, Psychological/physiology; Aggression/*physiology; Animals; *Dominance-Subordination; Female; *Hierarchy, Social; Hydrocortisone/blood; Individuality; Male; Matched-Pair Analysis; Oncorhynchus mykiss/*physiology; Stress/*physiopathology |
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Social stress is frequently used as a model for studying the neuroendocrine mechanisms underlying stress-induced behavioral inhibition, depression, and fear conditioning. It has previously been shown that social subordination may result in increased glucocorticoid release and changes in brain signaling systems. However, it is still an open question which neuroendocrine and behavioral differences are causes, and which are consequences of social status. Using juvenile rainbow trout of similar size and with no apparent differences in social history, we demonstrate that the ability to win fights for social dominance can be predicted from the duration of a behavioral response to stress, in this case appetite inhibition after transfer to a new environment. Moreover, stress responsiveness in terms of confinement-induced changes in plasma cortisol was negatively correlated to aggressive behavior. Fish that exhibited lower cortisol responses to a standardized confinement test were markedly more aggressive when being placed in a dominant social position later in the study. These findings support the view that distinct behavioral-physiological stress coping styles are present in teleost fish, and these coping characteristics influence both social rank and levels of aggression. |
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Biology Department and Neuroscience Group, University of South Dakota, Vermillion, SD 57069, USA. oyvind.overli@bio.uio.no |
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0018-506X |
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PMID:15053939 |
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no |
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Equine Behaviour @ team @ |
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4192 |
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Author |
Griffin, A.S. |
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Social learning in Indian mynahs, Acridotheres tristis: the role of distress calls |
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Journal Article |
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Year |
2008 |
Publication |
Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
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75 |
Issue |
1 |
Pages |
79-89 |
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Acridotheres tristis; distress vocalizations; head saccades; Indian mynah; predator avoidance learning; social learning |
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Socially acquired predator avoidance is a phenomenon in which individuals acquire an avoidance response towards an initially neutral stimulus after they have experienced it together with the antipredator signals of social companions. Earlier research has established that alarm calls used for intraspecific communication are effective stimuli for triggering acquisition. However, animals produce a large range of other antipredator responses that might engage antipredator learning. Here, I examine the effects of conspecific distress calls, a signal that is produced by birds when restrained by a predator, and that appears to be directed towards predators, rather than conspecifics, on predator avoidance learning in Indian mynahs, Acridotheres tristis. Distress calls reflect high levels of alarm in the caller and should, therefore, mediate robust learning. Experiment 1 revealed that subjects performed higher rates of head movements in response to a previously unfamiliar avian mount after it had been presented simultaneously with playbacks of conspecific distress vocalizations. Experiment 2 revealed that increased rates of head saccades resembled the spontaneous response evoked by a novel stimulus more closely than it resembled the response evoked by a perched raptor, suggesting that distress calls inculcated a visual exploratory response, rather than an antipredator response. While it is usually thought that the level of acquisition in learners follows a simple relationship with the level of alarm shown by demonstrators, the present results suggest that this relationship may be more complex. Antipredator signals with different functions may have differential effects on learners. |
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0003-3472 |
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Equine Behaviour @ team @ |
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4696 |
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Author |
McGee, S.; Smith, H.V. |
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Accompanying pre-weaned Thoroughbred (Equus caballus) foals while separated from the mare during covering reduces behavioural signs of distress exhibited |
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Journal Article |
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Year |
2004 |
Publication |
Applied Animal Behaviour Science |
Abbreviated Journal |
Appl. Anim. Behav. Sci. |
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Volume |
88 |
Issue |
1-2 |
Pages |
137-147 |
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Keywords |
Distress; Foals; Maternal separation; Stereotypies; Welfare |
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Abstract |
Some Thoroughbred stallion farms separate the mare from the foal during breeding, leaving the foal alone in its stall. Such separation often leads to distress in the foal, as evidenced by behavioural indicators such as vocalisations, pacing or moving about, pawing and striking the body against solid objects. This study examined whether the foal's distress is reduced if a handler accompanies it during the period of separation. A total of 57 foals on an Irish stud farm were observed: 27 foals were accompanied during separation and 30 were left in isolation but discretely observed from outside the stall. On average, unaccompanied foals vocalised at significantly (P<0.001) shorter intervals (14.8 s versus 26.8 s), and spent significantly (P<0.05) more time pawing (29.6 s versus 6.8 s) than accompanied ones. In addition, 17 of the unaccompanied foals hurled themselves against a solid object on at least one occasion, while not one of the accompanied foals did this (P<0.001). Age, gender and number of times the foal had been previously separated from the mare while she was being teased or covered were not significantly related to any of the behavioural indicators of distress. Overall, the data provide clear evidence that accompanying a foal reduces the distress that it exhibits when separated from the mare. This procedure has obvious welfare benefits in the short term, in that the foal both experiences less distress and has a reduced likelihood of injuring itself, and it may have longer-term benefits by reducing the chance of the animal later developing a locomotory stereotypical behaviour. |
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Equine Behaviour @ team @ |
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3639 |
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Author |
Skandakumar, S.; Stodulski, G.; Hau, J. |
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Title |
Salivary IgA: a Possible Stress Marker In Dogs |
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Abstract |
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Year |
1995 |
Publication |
Animal Welfare |
Abbreviated Journal |
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4 |
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4 |
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339-350 |
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Animal Welfare; Behaviour; Cortisol; Dog; Salivary Iga (S-Iga); Stress; Well-Being |
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Stress in humans has been reported to be associated with a decrease in the salivary immunoglobulin A (s-IgA) levels enabling the possible use of s-IgA to assess stress. Prolonged stress, if reliably assessed in a non-invasive manner, may be used to assess animal welfare. This study analysed groups of dogs undergoing physical and temperamental training and s-IgA levels were measured by rocket immunoelectrophoresis in prospective samples. Behavioural assessment was carried out and cortisol levels in saliva were measured by ELISA. A significant negative correlation (P < 0.007) between the logarithmic cortisol concentrations and s-IgA levels in saliva was recorded. The behavioural assessment of the dogs agreed well with the biochemical markers. It is concluded that IgA levels in saliva may be a useful marker of dog well-being and that stress results in decreased s-IgA levels. |
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Equine Behaviour @ team @ |
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5964 |
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Author |
Zebisch, A.; May, A.; Reese, S.; Gehlen, H. |
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Title |
Effect of different head-neck positions on physical and psychological stress parameters in the ridden horse |
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Journal Article |
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Year |
2013 |
Publication |
Journal of Animal Physiology and Animal Nutrition |
Abbreviated Journal |
J Anim Physiol Anim Nutr |
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98 |
Issue |
5 |
Pages |
901-907 |
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Keywords |
hyperflexion; head-neck position; stress; training; animal welfare |
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Summary Different head?neck positions (HNPs) are used in equestrian sports and are regarded as desirable for training and competition by riders, judges and trainers. Even though some studies have been indicative of hyperflexion having negative effects on horses, this unnatural position is frequently used. In the present study, the influence of different HNPs on physical and psychological stress parameters in the ridden horse was investigated. Heart rate (HR), heart rate variability (HRV) and blood cortisol levels were measured in 18 horses. Low frequency (LF) and high frequency (HF) are power components in the frequency domain measurement of HRV which show the activity of the sympathetic and parasympathetic nervous system. Values were recorded at rest, while riding with a working HNP and while riding with hyperflexion of the horse's head, neck and poll. In addition, rideability and behaviour during the different investigation stages were evaluated by the rider and by an observer. Neither the HR nor the HRV showed a significant difference between working HNP (HR = 105 ± 22/min; LF/HF = 3.89 ± 5.68; LF = 37.28 ± 10.77%) and hyperflexion (HR = 110 ± 18; LF/HF = 1.94 ± 2.21; LF = 38.39 ± 13.01%). Blood cortisol levels revealed a significant increase comparing working HNP (158 ± 60 nm) and hyperflexion (176 ± 64 nm, p = 0.01). The evaluation of rider and observer resulted in clear changes of rideability and behavioural changes for the worse in all parameters collected between a working HNP and hyperflexion. In conclusion, changes of the cortisol blood level as a physical parameter led to the assumption that hyperflexion of head, neck and poll effects a stress reaction in the horse, and observation of the behaviour illustrates adverse effects on the well-being of horses during hyperflexion. |
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Wiley/Blackwell (10.1111) |
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0931-2439 |
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Notes |
doi: 10.1111/jpn.12155 |
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Equine Behaviour @ team @ |
Serial |
6427 |
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Author |
Oikawa, M.; Hobo, S.; Oyamada, T.; Yoshikawa, H. |
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Title |
Effects of Orientation, Intermittent Rest and Vehicle Cleaning During Transport on Development of Transport-related Respiratory Disease in Horses |
Type |
Journal Article |
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Year |
2005 |
Publication |
Journal of Comparative Pathology |
Abbreviated Journal |
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Volume |
132 |
Issue |
2-3 |
Pages |
153-168 |
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Keywords |
horse; respiratory disease; transit fever; transit stress |
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Abstract |
Summary The effects of various factors on the inflammatory and stress response in horses during transportation were examined in Experiments 1 and 2, carried out in April and August, respectively. In Experiment 1, three groups (G1-G3) of four Thoroughbreds were used, and in Experiment 2, two groups (G4, G5). G1 animals were loaded into lorries with their heads facing forwards (FF) and given periods of short rest (SR) (30 min for every 4 h driven). G2 horses were loaded facing rearwards (FR) and given SR. G3 horses were FF and given periods of long rest (LR) (2 h rest for every 4 h driven). G4 horses were transported FF with hay suspended in front of them and no cleaning of faeces or urine during rest stops. G5 horses were FF and given pellets instead of hay, and the lorry was cleaned and washed at each rest stop. G4 and G5 horses were rested for 1 h after every 5 h of driving. All groups were driven a distance of 1500 km, and the total journey time was 37 h for G1 and G2, 49 h for G3, and 40 h for G4 and G5. In Experiment 1, indicators of inflammatory and stress responses tended to be highest in G1, intermediate in G2 and lowest in G3. In Experiment 2 they tended to be higher in G4 than in G5. The results suggested that increasing the rest time and cleaning the interior of the vehicle during rest stops reduced transportation stress and respiratory insults, factors that may lead to respiratory disease. |
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Equine Behaviour @ team @ |
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3693 |
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