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Berger, A., Scheibe, K. - M., Eichhorn, K., Scheibe, A., & Streich, J. (1999). Diurnal and ultradian rhythms of behaviour in a mare group of Przewalski horse (Equus ferus przewalskii), measured through one year under semi-reserve conditions. Appl. Anim. Behav. Sci., 64(1), 1–17.
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Scheibe, K. M., Schleusner, T., Berger, A., Eichhorn, K., Langbein, J., Dal Zotto, L., et al. (1998). ETHOSYS (R)--new system for recording and analysis of behaviour of free-ranging domestic animals and wildlife. Appl. Anim. Behav. Sci., 55(3-4), 195–211.
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Dalmau, A., Ferret, A., Chacon, G., & Manteca, X. (2007). Seasonal Changes in Fecal Cortisol Metabolites in Pyrenean Chamois. J Wildl Manag, 71(1), 190–194.
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Lomas, C. A., Piggins, D., & Phillips, C. J. C. (1998). Visual awareness. Appl. Anim. Behav. Sci., 57(3-4), 247–257.
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Bottoms, G. D., Roesel, O. F., Rausch, F. D., & Akins, E. L. (1972). Circadian variation in plasma cortisol and corticosterone in pigs and mares. Am J Vet Res, 33(4), 785–790.
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Kirkpatrick, J. F., Vail, R., Devous, S., Schwend, S., Baker, C. B., & Wiesner, L. (1976). Diurnal variation of plasma testosterone in wild stallions. Biol Reprod, 15(1), 98–101.
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Lees, P., & Tavernor, W. D. (1970). Influence of halothane and catecholamines on heart rate and rhythm in the horse. Br J Pharmacol, 39(1), 149–159.
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Stahl, F., & Dorner, G. (1982). Responses of salivary cortisol levels to stress-situations. Endokrinologie, 80(2), 158–162.
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Tavernor, W. D., & Lees, P. (1968). A pharmacological investigation of the influence of suxamethonium on cardiac function in the horse. Experientia, 24(6), 582–583.
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Touma, C., Sachser, N., Mostl, E., & Palme, R. (2003). Effects of sex and time of day on metabolism and excretion of corticosterone in urine and feces of mice. Gen Comp Endocrinol, 130(3), 267–278.
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