Nutrient Composition of Locally Available Browses Consumed by Matschie’s Tree Kangaroos (Dendrolagus matchiei) in Six North American Zoological Facilities
Journal of Agriculture and Ecology Research International,
Page 10-17
DOI:
10.9734/jaeri/2020/v21i1130177
Abstract
Locally collected browses (n=17 spp.) consumed by Matschie’s tree kangaroos (Dendrolagus matschiei) in 6 North American zoological institutions were analyzed for comparison with native plants eaten by this species in Papua New Guinea to evaluate dietary suitability. Primary nutrients including crude protein and fat, fiber, starch, non-fiber carbohydrates, and ash were determined using standard analytical methods for forages. Macrominerals calcium (Ca), phosphorus (P), magnesium (Mg), potassium (K), sodium (Na) and sulfur (S), as well as trace elements copper (Cu), iron (Fe), manganese (Mn), molybdenum (Mo) and zinc (Zn) were quantified in leaf (n=18), flower (n=1), twig (n=9) and bark (n=6) samples. Tannin content was estimated through the bovine serum albumin methodology. On a dry matter basis (DMB) , foods averaged (± SD) moderate protein (12 ± 5%) and soluble carbohydrate (27 ± 12%) content, along with low starch (1 ± 1%) and crude fat (3 ± 2%) values, and moderate to high values in fiber fractions (neutral detergent fiber 49 ± 15%, acid detergent fiber 33 ± 13%, lignin 11 ± 5%). Macromineral concentrations (Ca 2.2 ± 1.6%, P 0.2 ± 0.1%, Mg 0.3 ± 0.2%, K 1.5 ± 0.6%, Na 0.03 ± 0.04%, S 1.2 ± 1%) and select trace minerals were within anticipated ranges (Cu 11 ± 5 mg/kg, Mo 1 ± 1 mg/kg and Zn 33 ± 18 mg/kg); exceptions Fe (122 ± 11 mg/kg) and Mn (51 ± 81 mg/kg) were considered on the high end of dietary adequacy for most herbivores. Leaves differed significantly from woody parts for all proximate nutrients, as well as K, S, Fe, and tannin content. Consumed in a 50:50 DMB ratio, locally available browses provide similar nutrient profiles as plants eaten by free-living tree kangaroos. Combined data provide information useful in establishing nutrient targets for dietary development, leading to improved health, welfare, and feeding management of tree kangaroo populations under human care.
Keywords:
- Browse
- herbivore
- marsupial
- nutrition.
How to Cite
References
Blessington J, Steenberg J, Phillips TM, Highland M, Kozlowski C, Dierenfeld E. Biology and health of tree kangaroos in zoos. In: Dabek L, Valentine P, Blessington J, Schwartz KR, editors. Tree kangaroos: Science and conservation. London, Elsevier Inc.; 2021.
Blessington J, Steenberg J, editors. Tree kangaroo (Dendrolagus spp.) husbandry manual 3rd ed. Silver Spring (MD): Association of American Zoos and Aquariums; 2007.
Travis E, Watson P, Dabek L. Health assessment of free-ranging and captive Matchie’s tree kangaroos (Dendrolagus matschiei) in Papua New Guinea. Journal of Zoo and Wildlife Medicine. 2012;43(1):1-9.
Blessington J, Steenberg J, Schwartz KR, Schürer U, Smith B, Richardson M, Jaffar R, Ford C. Tree kangaroo populations in managed facilities. In: Dabek L, Valentine P, Blessington J, Schwartz KR, editors. Tree kangaroos: Science and conservation. London, Elsevier Inc.; 2021.
Martin JS, Martin MM. Tannins assays in ecological studies: lack of correlation between phenolics, proanthocyanidins, protein-precipitating constituents in mature foliage of six oak species. Oecologia 1982; 54:205-211.
Van Soest PJ. Nutritional ecology of the ruminant. Ithaca: Cornell University Press; 1994.
Schilcher B, Baumgartner K, Geyer H, Liesegang A. Investigations of rumen health of different wild ruminants in relation to feeding management. Journal of Zoo and Aquarium Research 2013;1(1):1-3.
Gattiker C, Espie I, Kotze A, Lane EP, Codron D, Clauss M. Diet and diet-related disorders in captive ruminants at the national zoological gardens of South Africa. Zoo Biology. 2014;33(5):426-432.
Clauss M. Tannins in the nutrition of wild animals: a review. In: Fidgett A, Clauss M, Gansloßer U, Hatt J-M, Nijboer J, editors. Zoo Animal Nutrition volume 2. Fürth, Filander Verlag; 2003.
McArthur C, Sanson GD. Nutritional effects and costs of a tannin in a grazing and a browsing macropodid marsupial herbivore. Functional Ecology. 1993;7(6):690-696. Availavle:https://www.jstor.org/stable/2390190
McArthur C, Sanson GD. Nutritional effects and costs of a tannin in two marsupial arboreal folivores. Functional Ecology. 1993;7(6):697-703. Availavle:https://www.jstor.org/stable/2390191.
Morris ER. Iron. In: Mertz W (editor). Trace elements in human and animal nutrition 5th edition. San Diego, Academic Press; 1987.
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