Hormonphysiologische und ethologische Untersuchung am Goodfellow-Baumkänguru (Dendrolagus goodfellowi Thomas, 1908)

Currently seven animal species worldwide are managed in Global Species Management Programs (GSMPs). Since 2013 the Goodfellow's tree kangaroo (Dendrolagus goodfellowi) is the first marsupial in this group of species. The primary goal of the GSMP is to enhance the sustainability of the captive population. Reproductive cycles of seven female Goodfellow-tree kangaroo's kept in German zoos were studied during a period of 23 weeks. Faecal samples and behavioural data were collected in order to identify oestrous specific behaviour. Faecal hormone metabolites were analysed using an enzyme-immunoassay for 4-Pregnen-20α-ol-3-one (trivial name: 20α-Progesterone). Faecal hormone metabolites indicated reproductive activity in all females studied, even in a 19 year old individual. The average oestrous cycle was 54.3 ± 1.6 days. During oestrus periods females showed significantly more pouch licking behaviour (p < 0,01), while the breeding male had significantly more interest in females (p < 0,05) indicated by sniffling and vocalization (sound: clicking/“chitching”). Finally this study demonstrates that the applicability of faecal hormone analysis is an adequate method for reproductive monitoring in Goodfellow's tree kangaroos.