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    Versuche zur Beurteilung der Tiergerechtigkeit bei der Haltung von Mäusen auf der Grundlage von Bewegungsaktivität und Verhaltensmustern (1995)

    Art
    Hochschulschrift
    Autor
    Sibiller, Andrea
    Quelle
    Berlin, 1995 — 135 Seiten
    Kontakt
    Institut für Tierschutz und Tierverhalten

    Königsweg 67
    Gebäude 21, 1. OG
    14163 Berlin
    Tel.: +49 30 838 62901 (Sekretariat)
    email: tierschutz@vetmed.fu-berlin.de

    Abstract / Zusammenfassung

    Subject of the experiments was the assessment of commensurability of cages with the needsof mice. Different sizes of cages were assessed on the base of movement activity and behaviouralpatterns of caged mice. For this purpose groups of ten young or adult female NMRI-mice (all of thesame age in one group respectively) were evenly distributed on different cages of different sizesby chance selection.The techniques of measurement were as follows:1. (Video-) observation and drawing up of ethograms2. Behaviour in a system of examination was counterchecked by observation of behaviour in asystem of reference. Deviations in duration and frequency of behavioural patterns were registered3. Needs of the animals were measured by temporally restricted and controlled deprivation ofpossibilities to unfold behaviour. After restoration of possibilities fregueneies of activities wereexaminedGroups and scheme of experiment were as follows:Young group (gr.l) cage type 4 -> activity wheel -> type 2 -> activity wheel -> type 4 -> activitywheelYoung group (gr.2) cage type 2 -> activity wheel -> type 4 -> activity wheel -> type 2 -> activitywheelAdult group (gr.3) cage type 4 -> activity wheel -> type 2 -> activity wheel -> type 4 -> activitywheelAdult group (gr.4) cage type 2 -> activity wheel -> type 4 -> activity wheel -> type 2 -> activitywheelAdult group (gr.5) cage type 3 -> activity wheel -> type 3 -> activity wheel -> type 3 -> activitywheelYoung group (gr.6) cage type 3 -> activity wheel -> type 3 -> activity wheel -> type 3 -> activitywheelThe young mice were about five weeks old, the adult mice were about eleven month old when theexperiment started. Measurements in cage types 2, 3 and 4 were m de by infrared detectors andvideo-observation; duration of stay in the respective cages was ten days. Measurements in theactivity cage were made by means of light barrier at the activity wheel; duration of stay was fourdays.Results from the experiments can be summarized as follows:Activity wheel measurements and infrared measurements showed main activity periods from 6 p.m.to 3 a.m. and from 5 a.m. to 9 a.m.The system of measurements by infrared detectors used in this study was not suitable forcomparing different groups of mice respectively different cage types.Measurements of activity wheels by light barriers revealed: For ithe activity in the activity wheel it is not important which typeof cage the groups of mice had stayed in before.E e adult groups were less active in the activity wheel than theyoung groups.E e analysis of video-observation revealed: -Differences in behaviour dependent of age~ e groups of young mice were twice as active as the adult groups. E e young mice showed longer grooming and they performed running, climbing, jumping and rearing while sniffing more often and over longer periods of time than the adult mice. The adult mice had longer social contacts, they showed ¯ ving forward while sniffing more often, and they performed sitting while sniffing ¯ re often and over longer periods than the young mice.-Differences in behaviour dependent of cage typeIn cage type 4 young and adult groups ran significantly ¯ re often and over longer periods of time than in cage type 2. In cage type 4 the adult mice showed twice as many and also longer social contacts than in cage type 2; in cage type 2 the adult mice climbed twice as often and groomed twice as long than in cageg type 4.1-1X I s ~j -125-____....~_ _Measurements of activity wheels by light barriers revealed: For the activity in the activity wheel it is not important which type of cage the groups of mice had stayed in before. The adult groups were less active in the activity wheel than the young groups.The analysis of video-observation revealed: -Differences in behaviour dependent of ageThe groups of young mice were twice as active as the adult groups. The young mice showed longer grooming and they performed running, climbing, jumping and rearing while sniffing more often and over longer periods of time than the adult mice. The adult mice had longer social contacts, they showed moving forward while sniffing more often, and they performed sitting while sniffing more often and over longer periods than the young mice.-Differences in behaviour dependent of cage typeIn cage type 4 young and adult groups ran significantly more often and over longer periods of time than in cage type 2. In cage type 4 the adult mice showed twice as many and also longer social contacts than in cage type 2; in cage type 2 the adult mice climbed twice as often and groomed twice as long than in cage type 4.