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図1 施行時の条件別にみた国後島におけるオジロワシの調査ルート
図2 国後島におけるオジロワシ成鳥の分布によるつがいの推定方法
(1) I assumed two adults located within 5 km as a pair.
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(2) When two adults were located over 5 km apart, each adult was assumed as a mate of different pairs.
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(3) When other two adults were located dividedly within 5 km on both sides of an adult eagle, the closer one was considered the pair mate.
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