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Researcher's Information - National Institute for Agro-Environmental Sciences, NIAES

April 1, 2015

Name

YAMAMURA, Kohji

Position

Biodiversity Division
Senior Researcher

Contact

E-mail: yamamura@niaes.affrc.go.jp

Current research

I am studying several subjects to manage populations living in an agricultural environment.

• Which factor stabilizes the dynamics of populations?
• How do alien species expand their distribution?
• How does global warming influence the abundance of populations?
• How can we effectively record the population dynamics?
• How can we protect against biological invasions?

Home page

http://cse.niaes.affrc.go.jp/yamamura/index_e.html

Original research papers (since 2002, first author)

• Yamamura K (2014) Estimation of the predictive ability of ecological models. Commun Statist - Simul Comp (DOI:10.1080/03610918.2014.889161)
• Yamamura K (2012) Extended key-factor/key-stage analysis for longitudinal data. J Biopharm Stat 22:1-15
• Yamamura K, Ishimoto M (2009) Optimal sample size for composite sampling with subsampling, when estimating proportion of pecky rice grains in a field. J Agric Biol Environ Stat 14:135-153
• Yamamura K, Matsuda H, Yokomizo H, Kaji K, Uno H, Tamada K, Kurumada T, Saitoh T, Hirakawa H (2008) Harvest-based Bayesian estimation of sika deer populations using state-space models. Popul Ecol 50:131-144
• Yamamura K, Hino A (2007) Estimation of the proportion of defective units by using group testing under the existence of a threshold of detection. Communications in Statistics - Simulation and Computation 36: 949-957
  
• Yamamura K, Wada T, Urano S (2007) Random median sampling to enhance the precision of population estimates. Popul Ecol 49:357-363
• Yamamura K, Moriya S, Tanaka K, Shimizu T (2007) Estimation of the potential speed of range expansion of an introduced species: characteristics and applicability of the gamma model. Popul Ecol 49:51-62
  
• Yamamura K, Yokozawa M, Nishimori M, Ueda Y, Yokosuka T (2006) How to analyze long-term insect population dynamics under climate change: 50-year data of three insect pests in paddy fields. Popul Ecol 48:31-48
• Yamamura K (2004) Dispersal distance of corn pollen under fluctuating diffusion coefficient. Popul Ecol 46:87-101
• Yamamura K (2003) Population estimation by a one-release, two-capture experiment. Appl Entomol Zool 38:475-486
• Yamamura K, Kishita M, Arakaki N, Kawamura F, Sadoyama Y (2003) Estimation of dispersal distance by mark-recapture experiments using traps: correction of bias caused by the artificial removal by traps. Popul Ecol 45:149-155
• Yamamura K, Nemoto H (2003) Sampling plan using grade of infestation to estimate population density. Appl Entomol Zool 38:149-156
• Yamamura K, Moriya S, Tanaka K (2003) Discrete random walk model to interpret the dispersal parameters of organisms. Ecol Model 161:151-157
• Yamamura K (2002) Dispersal distance of heterogeneous populations. Popul Ecol 44:93-101
• Yamamura K (2002) Biodiversity and stability of herbivore populations: influences of the spatial sparseness of food plants. Popul Ecol 44:33-40
• Yamamura K, Yokozawa M (2002) Prediction of a geographical shift in the prevalence of rice stripe virus disease transmitted by the small brown planthopper, Laodelphax striatellus (Fallén) (Hemiptera: Delphacidae), under global warming. Appl Entomol Zool 37:181-190