Behaviour of golden hamsters (Mesocricetus auratus) - Vetsuisse ...

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were disturbed from sampling on the previous day, while sleeping in the bedding, butbecause of a habit effect PAA-reaction was lower on the second day which resultedin lower corticosteroid values. So it might be better to perform blood sampling withinone day. However, further complications arise due to the dependence of the PAA onchronobiology. When treatments affect the circadian rhythms as it was found(Hauzenberger et al., in preparation), then it would be impossible to relate certainhormone levels to circadian times.Other complications could arise from a shorter duration of catching due to the trainingof the handler. It means that hamsters that were caught later were caught faster.Although it seems to have had no general influence in our analyses, we cannotexclude an effect, since on day 1 hamsters that were caught later had a lower cortisollevel. This could be due to the time of day, or due to a difference in duration ofanaesthesia and total duration of blood sampling.The correlation between the duration of catching and the anaesthesia was probablydue to the level of experience. Furthermore, the equipment for anaesthesia was notworking properly in the first series which might have contributed to the effect ofseries. Since the experiments were done year-round, an effect of the season cannotbe excluded.47
ConclusionsSince the stress response of the PAA is very sensitive to many unwanted anduncontrollable factors the results have to be interpreted with caution.Physiological measures of animal welfare can only serve as an additional brick stoneto accompany parameters such as behaviour. No parameter can be interpreted byitself, but always in the context of additional findings.48
Page 1 and 2: Institut für Genetik, Ernährung u
Page 3 and 4: Table of contentPage1 Zusammenfassu
Page 5 and 6: eingerichtet. Die Laufradaktivität
Page 7 and 8: 2 Behaviour of golden hamsters (Mes
Page 9 and 10: IntroductionHamsters are common lab
Page 11 and 12: MethodsAnimals and housing conditio
Page 13 and 14: weaningvideorecordingvideorecording
Page 15 and 16: ResultsBehaviourHamsters devoted mo
Page 17 and 18: Tab. 2 Post-hoc comparisons of runn
Page 19 and 20: GroomingAll hamsters were observed
Page 21 and 22: Open spaceUsage of open space was p
Page 23 and 24: Stress hormones and organsNeither s
Page 25 and 26: directed exploration, which, after
Page 27 and 28: top wire. Some hamsters used to cli
Page 29 and 30: Autopsies of the three hamsters tha
Page 31 and 32: ReferencesBantin G.C. and Sanders P
Page 33 and 34: Sherwin C.M., 1998. Voluntary wheel
Page 35 and 36: 3 CAN WE TELL HAMSTERS ARE STRESSED
Page 37 and 38: IntroductionConcentrations of gluco
Page 39 and 40: The experiments were approved by th
Page 41 and 42: ResultsMales had generally higher v
Page 43 and 44: Fig. 1 The concentration of cortiso
Page 45 and 46: ACTHLevels of ACTH were significant
Page 47 and 48: ACTH-Challenge TestIn the ACTH-chal
Page 49: negative feedback of cortisol: incr
Page 53 and 54: Kuhnen, G., Werner, R. 1998. Plasma
Page 55 and 56: 4 AppendixApp. I Cage size 1 (right
Page 57 and 58: App. IV Behaviour catalogue. Descri
Page 59: 5 DanksagungenIch möchte allen dan

Behaviour of golden hamsters (Mesocricetus auratus) - Vetsuisse ...

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