
TY  - JOUR
A1  - Ullrey, DE 
A1  - Robinson, PT 
A1  - Whetter, PA 
T1  - Eucalyptus Digestibility and Digestible Energy Requirements of Adult Male Koalas, Phascolarctos Cinereus (Marsupialia).
JF  - Australian Journal of Zoology
JO  - Aust. J. Zool.
Y1  - 1981
VL  - 29
IS  - 6
SP  - 847
EP  - 852
KW  - 
UR  - https://doi.org/10.1071/ZO9810847 
N2  - Three adult male koalas were individually fed on a diet of Eucalyptus melliodora, E. robusta and E. sideroxylon plus trace mineral salt and water to appetite. Fresh browse was offered daily for 14 days before and 7 days during quantitative collection of faeces. Samples of browse representing plant parts consumed were collected, and acid lignin ratio techniques were used to estimate nutrient digestibility. Apparent digestibility of DM was 54-70%, gross energy 47-64%, crude protein 32-50%, ether extract 37-50%, neutral detergent fibre 23-57% and acid detergent fibre 9-55%. Total faecal acid lignin excretion was used to estimate digestible energy (DE) intake. Since bodyweights (W) were maintained during the study, daily DE requirements for adult maintenance were estimated to range from 257 to 411 kJ/W0.75. If an 87% recovery in the faeces of dietary acid lignin was assumed, estimated DE requirements for adult maintenance ranged from 312 to 439 kJ/W0.75. These values are lower than commonly accepted interspecific values for eutherians but are consistent with evidence that the koala has a relatively low basal metabolic rate. 
ER  -

