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Exploring the drivers of wildlife population dynamics from insufficient data by Bayesian model averaging

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Population Ecology

Abstract

A long-standing interest in ecology and wildlife management is to find drivers of wildlife population dynamics because it is crucial for implementing the effective wildlife management. Recent studies have demonstrated the usefulness of state-space modeling for this purpose, but we often confront the lack of the necessary time-series data. This is particularly common in wildlife management because of limited funds or early stage of data collection. In this study, we proposed a Bayesian model averaging technique in a state-space modeling framework for identifying the drivers of wildlife population dynamics from limited data. To exemplify the utility of Bayesian model averaging for wildlife management, we illustrate here the population dynamics of wild boars Sus scrofa in Chiba prefecture, central Japan. Despite the fact that our data are limited in both temporal and spatial resolution, Bayesian model averaging revealed the potential influence of bamboo forests and abandoned agricultural fields on wild boar population dynamics, and largely enhanced model predictability compared to the full model. Although Bayesian model averaging is not commonly used in ecology and wildlife management, our case study demonstrated that it may help to find influential drivers of wildlife population dynamics and develop a better management plan even from limited time-series data.

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Acknowledgments

We are grateful to the public officers of the municipalities in our study area for data collection. We also thank G. Fujita, S. Nishijima, M. Kuroe, and the staff of the Laboratory of Biodiversity Science of the University of Tokyo for helpful comments. This work was supported financially by a Grant-in-Aid for JSPS Fellows (KAKENHI Grant Number 24-7455), The Mitsui & Co., Ltd. Environment Fund (Grant Number R10-C074), and the Japan Society for the Promotion of Science (KAKENHI Grant Number 25281057).

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Authors and Affiliations

  1. Graduate School of Agriculture and Life Sciences, The University of Tokyo, Tokyo, Japan

    Yutaka Osada, Takeo Kuriyama & Tadashi Miyashita

  2. ASADA Wildlife Management Company (AMAC, LLC), Chiba, Japan

    Masahiko Asada

  3. Center for Environmental Risk Research, National Institute for Environmental Studies, Ibaraki, Japan

    Hiroyuki Yokomizo

Authors
  1. Yutaka Osada
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  2. Takeo Kuriyama
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  3. Masahiko Asada
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  4. Hiroyuki Yokomizo
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  5. Tadashi Miyashita
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Correspondence to Yutaka Osada.

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Osada, Y., Kuriyama, T., Asada, M. et al. Exploring the drivers of wildlife population dynamics from insufficient data by Bayesian model averaging. Popul Ecol 57, 485–493 (2015). https://doi.org/10.1007/s10144-015-0498-x

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  • DOI: https://doi.org/10.1007/s10144-015-0498-x

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