Journal article
Milk composition and production in free-living allied rock-wallabies, Petrogale assimilis
Australian Journal of Zoology, Vol.44(6), pp.659-674
1996
Abstract
Milk composition and the rates of milk consumption by pouch young were examined in free-living allied rock-wallabies, Petrogale assimilis. Milk solids concentrations were approximately 16% (w/w) at 70 days post-partum and increased to about 22% by 170 days when young first left the pouch. By permanent pouch emergence (about 200 days), concentrations had declined and stabilised at about 19%. Milk carbohydrate peaked at 12% (w/v) at 150 days; lipid concentrations averaged 8% (w/w) at 200 days. The subsequent decline in carbohydrates was the main cause of the fall in milk solids. Protein concentrations increased gradually from about 3% (w/v) at 70 days to plateau at 5.5% at about 200 days. Milk consumption rates were measured from 72 to 159 days post-partum with 22Na turnover. Milk consumption, about 3 mL day- 1 initially, increased to an average of about 15 mL day-1 by 150 days. The mass gained by a pouch young between 72 and 159 days for each millilitre of milk consumed was not correlated with lactational stage and averaged 0.21 ± 0.014 (s.e.) g mL-1.
Details
- Title
- Milk composition and production in free-living allied rock-wallabies, Petrogale assimilis
- Authors/Creators
- J.C. Merchant (Author/Creator)H. Marsh (Author/Creator)P. Spencer (Author/Creator)G. Death (Author/Creator)
- Publication Details
- Australian Journal of Zoology, Vol.44(6), pp.659-674
- Publisher
- CSIRO Publishing
- Identifiers
- 991005540599607891
- Copyright
- © CSIRO 1996
- Murdoch Affiliation
- Murdoch University
- Language
- English
- Resource Type
- Journal article
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- Collaboration types
- Domestic collaboration
- Citation topics
- 3 Agriculture, Environment & Ecology
- 3.35 Zoology & Animal Ecology
- 3.35.721 Rodent Ecology
- Web Of Science research areas
- Zoology
- ESI research areas
- Plant & Animal Science