| Records |
| 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. |
| Title |
Stress coping style predicts aggression and social dominance in rainbow trout |
Type |
Journal Article |
| Year |
2004 |
Publication |
Hormones and Behavior |
Abbreviated Journal |
Horm Behav |
| Volume |
45 |
Issue |
4 |
Pages |
235-241 |
| Keywords |
Adaptation, Psychological/physiology; Aggression/*physiology; Animals; *Dominance-Subordination; Female; *Hierarchy, Social; Hydrocortisone/blood; Individuality; Male; Matched-Pair Analysis; Oncorhynchus mykiss/*physiology; Stress/*physiopathology |
| Abstract |
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. |
| Address |
Biology Department and Neuroscience Group, University of South Dakota, Vermillion, SD 57069, USA. oyvind.overli@bio.uio.no |
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English |
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0018-506X |
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PMID:15053939 |
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no |
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Equine Behaviour @ team @ |
Serial |
4192 |
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| Author |
Elfman, L.; Brannstrom, J.; Smedje, G. |
| Title |
Detection of Horse Allergen around a Stable |
Type |
Journal Article |
| Year |
2007 |
Publication |
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Abbreviated Journal |
Int Arch Allergy Immunol |
| Volume |
145 |
Issue |
4 |
Pages |
269-276 |
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| Abstract |
Background: Integrating horse stables with built-up areas may lead to conflicts. Dispersion of horse allergen may become a health risk for allergic people. The aim was to measure the dispersion of horse allergen around a stable, considering wind speed and direction and vegetation. The disturbance of staff at a workplace nearby a stable was investigated. Methods: Air sampling was performed around a stable (32 horses) at distances of 50-500 m in all directions. Sampling was done with a pump and an IOM sampler. Samples were collected at 50 points during all seasons. Horse allergen levels were determined using ELISA. Disturbance by horses was studied with a questionnaire handed to the employees in an office near the stable. Results: The median horse allergen level at the stable entrance was 316 U/m(3), in the horse fields 40 U/m(3) and in the whole source area 16 U/m(3), which declined to <2 U/m(3) at about 50 m from the source area. Downwind of the prevailing winds low levels of horse allergen (2-4 U/m(3)) could sometimes be detected at up to 500 m. The staff, including those allergic to horses, managed to tolerate horses close to the workplace. Conclusions: At low winds horse allergen spread in ambient air about 50 m from the stable and horse fields. At higher winds low allergen levels were sometimes found in open areas up to 500 m from the source area. These levels were similar to those found in the office after moving away from the stable area. The employees did not report more symptoms of allergy or asthma while working close to the stable compared to after the move. Copyright (c) 2007 S. Karger AG, Basel. |
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Department of Medical Sciences, Occupational and Environmental Medicine, Uppsala University Hospital, Uppsala, Sweden |
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English |
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1423-0097 |
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PMID:18025788 |
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no |
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Equine Behaviour @ team @ |
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4357 |
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Rietbroek, N.J.; Dingboom, E.G.; Joosten, B.J.L.J.; Eizema, K.; Everts, M.E. |
| Title |
Effect of show jumping training on the development of locomotory muscle in young horses |
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Journal Article |
| Year |
2007 |
Publication |
American Journal of Veterinary Research |
Abbreviated Journal |
Am J Vet Res |
| Volume |
68 |
Issue |
11 |
Pages |
1232-1238 |
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| Abstract |
OBJECTIVE: To investigate whether training for show jumping that is commenced early after birth affects the characteristics of equine locomotory muscle. ANIMALS: 19 Dutch Warmblood horses. PROCEDURES: Horses were assigned to a trained or not trained (control) group. After weaning, training (free jumping [2 d/wk] that was alternated with a 20-minute period of exercise in a mechanical rotating walker [3 d/wk]) was started and continued until horses were 3 years old. Fiber type composition (determined from myosin heavy chain [MyHC] content), fiber area, diffusion index (area supplied by 1 capillary), citrate synthase activity, and Na(+),K(+)-ATPase content were assessed in gluteus medius muscle specimens collected at 0.5, 1, 2, and 3 years. RESULTS: Developmental changes included an increase in MyHC fiber type IIa and a decrease in type IIad; increases in fiber area, diffusion index, and citrate synthase activity; and a decrease in Na(+),K(+)-ATPase content. The MyHC fiber type I and type IId were detected in high and low proportions, respectively. Training increased Na(+),K(+)-ATPase content, but did not affect other variables. CONCLUSIONS AND CLINICAL RELEVANCE: In horses, show jumping training at an early age resulted in increased Na(+),K(+)-ATPase content of the deep portions of the gluteus medius muscle. The lack of training effects on the other muscle characteristics can partly be explained by the fact that an appropriate (aerobic) fiber type composition was already established at training commencement. These data also suggested that the developmental changes in equine muscle represent sufficient adaptation to meet the demands of this specific training. |
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Department of Pathobiology, Faculty of Veterinary Medicine, Utrecht University, 3508 TD Utrecht, The Netherlands |
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English |
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0002-9645 |
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PMID:17975979 |
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no |
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Equine Behaviour @ team @ |
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4358 |
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| Author |
Potter, G.D.; Yeates, B.F. |
| Title |
Behavioral principles of training and management |
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Journal Article |
| Year |
1990 |
Publication |
The Horse, 2nd Edn |
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665-682 |
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Cited By (since 1996): 4; Export Date: 21 October 2008 |
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Equine Behaviour @ team @ |
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4540 |
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| Author |
Waring, G.H. |
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Book Whole |
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2003 |
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Horse behavior. 2nd ed |
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442 pp |
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Cited By (since 1996): 1; Export Date: 21 October 2008 |
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no |
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Equine Behaviour @ team @ |
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4548 |
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| Author |
Dalin, G.; Magnusson, L.E.; Thafvelin, B.C. |
| Title |
Retrospective study of hindquarter asymmetry in Standardbred trotters and its correlation with performance |
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| Year |
1985 |
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Equine Vet. J. |
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17 |
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292-296 |
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Cited By (since 1996): 8; Export Date: 24 October 2008 |
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Admin @ knut @ |
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4579 |
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Wood Gush, D.G.M. |
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The Behaviour of the Domestic Fowl |
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Miscellaneous |
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1971 |
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no |
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Equine Behaviour @ team @ |
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4872 |
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| Author |
Mills, G. |
| Title |
Kalahari Hyenas |
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Miscellaneous |
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1991 |
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Equine Behaviour @ team @ |
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4884 |
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Briefer, E.F.; Padilla de la Torre, M.; McElligott, A.G. |
| Title |
Mother goats do not forget their kids' calls |
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2012 |
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Proc R Soc B |
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279 |
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Equine Behaviour @ team @ Briefer2012 |
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6282 |
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Ripple, W.J.; Estes, J.A.; Beschta, R.L.; Wilmers, C.C.; Ritchie, E.G.; Hebblewhite, M. |
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Status and ecological effects of the world's largest carnivores |
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2014 |
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Science |
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343 |
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Equine Behaviour @ team @ Ripple2014 |
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6445 |
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