From 2012–2015 we conducted a Monitoring Avian Productivity and Survivorship (MAPS) program in Fukushima, Japan, using constant-effort mist netting and banding. Analysis of preliminary results, including adult abundance index, productivity index, and estimated adult survival rate, from four years of data showed no trend of increase or decrease. Continuous research for five to ten or more consecutive years is necessary in order to obtain reliable trends of productivity indices and estimated survival rates. Our results suggest that it is important to consider anthropogenic disturbances when study sites are chosen. To more-accurately analyze bird populations and dynamic parameters it is necessary to revise the JP MAPS protocol to include data from more study sites.
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