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Plant constituents affecting food selection by sika deer

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Title: Plant constituents affecting food selection by sika deer
Authors: Agetsuma, Naoki Browse this author →KAKEN DB
Agetsuma-Yanagihara, Yoshimi Browse this author
Takafumi, Hino Browse this author
Nakaji, Tatsuro Browse this author →KAKEN DB
Keywords: behavioral observation
Cervus nippon yakushimae
crude fat
crude protein
feeding plot
multivariate analysis
total phenolics
warm temperate forest
Issue Date: 21-Mar-2019
Publisher: John Wiley & Sons
Journal Title: Journal of wildlife management
Volume: 83
Issue: 3
Start Page: 669
End Page: 678
Publisher DOI: 10.1002/jwmg.21615
Abstract: We directly observed the feeding behaviors of Yaku sika deer (Cervus nippon yakushimae), the smallest subspecies of Japanese sika deer, by following 6 wild, habituated, and individually identifiable animals in a natural warm-temperate forest on the island of Yakushima, southern Japan, 2005-2006. Deer fed on various plant species and parts but predominantly on the fallen leaves, fruits, seeds, and flowers of woody plants (similar to 82% of food items) at 59 natural feeding plots. We analyzed 8 key plant constituents of eaten and uneaten items at the feeding plots, and examined the effects of each constituent on food selection by multivariate and univariate generalized linear mixed models. The multivariate analysis, which evaluated the effect of each plant constituent on food selection by controlling influences of the other constituents in the food items, showed that deer selected food items with higher contents of crude fat, crude protein, and total phenolics but with lower contents of lignin and condensed tannin from the available items at the feeding plots. Neither soluble nor structural carbohydrate, nor ash content affected selection of food items. It may be advantageous for these small ungulates with shorter gastrointestinal tracts to select foods that are relatively rich in fat because of the higher energy content of fat compared with carbohydrates. Furthermore, it appears that non-tannin phenolics may have beneficial functions in this species. The univariate analyses showed different effects of crude protein and structural carbohydrate on food selection compared to those derived from the multivariate analysis. We demonstrate that accounting for influences of other plant constituents by using multivariate analyses is important to ensure that any effects of individual plant constituents are not overlooked or overstated. (c) 2018 The Wildlife Society.
Rights: This is the peer reviewed version of the following article:, which has been published in final form at 10.1002/jwmg.21615. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
Type: article (author version)
Appears in Collections:北方生物圏フィールド科学センター (Field Science Center for Northern Biosphere) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 揚妻 直樹

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