HUSCAP logo Hokkaido Univ. logo

Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Agriculture / Faculty of Agriculture >
Peer-reviewed Journal Articles, etc >

Factors influencing lifespan dependency on agricultural crops by brown bears

Files in This Item:
20210423toHUSCAP_LAEE_Sakiyama2021_Manuscript.pdf1.16 MBPDFView/Open
20210423toHUSCAP_LAEE_Sakiyama2021_SupplementaryMaterial.docx1.34 MBMicrosoft Word XMLView/Open
Please use this identifier to cite or link to this item:

Title: Factors influencing lifespan dependency on agricultural crops by brown bears
Authors: Sakiyama, Tomoki Browse this author
Morimoto, Junko Browse this author →KAKEN DB
Matsubayashi, Jun Browse this author
Furukawa, Yasuto Browse this author
Kondo, Mami Browse this author
Tsuruga, Hifumi Browse this author
Mano, Tsutomu Browse this author
Nakamura, Futoshi Browse this author →KAKEN DB
Keywords: Agricultural landscape
Body size
Human-wildlife conflict
Stable isotope
Ursus arctos
Issue Date: Jul-2021
Publisher: Springer
Journal Title: Landscape and ecological engineering
Volume: 17
Start Page: 351
End Page: 362
Publisher DOI: 10.1007/s11355-021-00446-x
Abstract: Investigating factors underlying human-wildlife conflicts in agricultural landscapes is important for both preventing crop damage and wildlife conservation. Although environments surrounding crop fields are considered causal factors, incorporating individual aspects of animals, such as demographic and physical characteristics, into the investigation may aid the prediction of how nuisance control affects wildlife population structures. Here, we assessed the relationship of corn consumption by Hokkaido brown bears (Ursus arctos) with both demographic (sex and age) and physical (body size) characteristics and environmental factors (human presence and crop accessibility). We estimated the proportion of corn in the lifespan diet for both female (n = 61) and male (n = 62) bears using carbon and nitrogen stable isotope analyses. Then, we analyzed the factors correlated with corn consumption using a generalized linear model. Female and male bears consumed corn from 1.3 to 30.9% and 1.3 to 42.0% of their lifespan diet, respectively. Corn consumption by female bears was not correlated with any explanatory variables, whereas that of male bears was positively correlated with their body size and crop accessibility but negatively correlated with human presence. Large male bears were more likely to have consumed more corn than small male bears, but the selective harvest of large bears may cause dwarfism of their overall population, impacting the local population dynamics. To reduce agricultural damage and population structure alteration of brown bears, the opportunity for them to learn to eat crops must be eliminated through border management between forests and agricultural fields and the relocation of agricultural fields when possible.
Rights: This is a post-peer-review, pre-copyedit version of an article published in Landscape and Ecological Engineering. The final authenticated version is available online at:
Type: article (author version)
Appears in Collections:農学院・農学研究院 (Graduate School of Agriculture / Faculty of Agriculture) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 中村 太士

Export metadata:

OAI-PMH ( junii2 , jpcoar_1.0 )

MathJax is now OFF:


 - Hokkaido University