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Effects of two plant secondary metabolites, cineole and gallic acid, on nightly feeding patterns of the Common Brushtail Possum


Wiggins, NL and McArthur, C and McLean, SR and Boyle, RR, Effects of two plant secondary metabolites, cineole and gallic acid, on nightly feeding patterns of the Common Brushtail Possum, Journal of Chemical Ecology, 29, (6) pp. 1447-1464 . ISSN 0098-0331 (2003) [Refereed Article]

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DOI: doi:10.1023/A:1024221705354


We investigated effects of two plant secondary metabolites (PSMs), cineole and gallic acid, on the nightly feeding behavior of the common brushtail possum (Trichosurus vulpecula), a generalist folivore. We tested whether possums altered their feeding behavior in response to increasing levels of cineole, a dietary terpene. Possums were fed artificial diets containing three levels of cineole; zero (basal diet), medium (6.8% of total dry matter, DM), and high (15.3% DM). In another experiment, we introduced gallic acid, a dietary phenolic, into the diets. Possums were offered a Choice PSM diet (cineole and gallic acid diets simultaneously) or a No-Choice PSM diet (containing either cineole or gallic acid). Detoxification products of cineole and gallic acid were examined in urine to determine that different detoxification pathways were utilized in the elimination of each compound. With increasing cineole levels, possums ate less, had smaller feeding bouts, and had a lower rate of intake, but did not extend their total nightly feeding time. Possums offered the Choice PSM diet, compared with the No-Choice diets, ate more, had larger feeding bouts, and tended to increase their rate of intake. Results from the urinary analysis indicated that gallic acid and cineole were not involved in competing detoxification pathways in brushtail possums. There was also a significant sex effect: females ate more overall, ate more per feeding bout, and ate at a higher rate than males. These results indicate that PSMs not only constrain overall intake, but that possums alter their feeding behavior in response to them. Altered feeding patterns may reduce the negative influence of PSMs on intake.

Item Details

Item Type:Refereed Article
Research Division:Biological Sciences
Research Group:Zoology
Research Field:Zoology not elsewhere classified
Objective Division:Plant Production and Plant Primary Products
Objective Group:Other plant production and plant primary products
Objective Field:Other plant production and plant primary products not elsewhere classified
UTAS Author:Wiggins, NL (Dr Natasha Wiggins)
UTAS Author:McArthur, C (Dr Clare McArthur)
UTAS Author:McLean, SR (Professor Stuart McLean)
UTAS Author:Boyle, RR (Dr Rebecca Boyle)
ID Code:26284
Year Published:2003
Web of Science® Times Cited:79
Deposited By:Zoology
Deposited On:2003-08-01
Last Modified:2011-10-12
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