外来魚が移入された野池の魚類生態系調査と数理生態学的手法による未来予測

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  • ガイライギョ ガ イニュウ サレタ ノチ ノ ギョルイ セイタイケイ チョウサ ト スウリ セイタイガクテキ シュホウ ニ ヨル ミライ ヨソク
  • An Investigation of an Ecological System of Fish in a Pond Invaded by Fish-eater Fish and a Simulation of Population Change Based on a Mathematical Modeling

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We investigate an ecological system of fish in a pond which was invaded by fish- eater fish from overseas. A population of bait fish is estimated by a traditional marks-recapture method. A number of eaters which are not easily caught is estimated by using a new method proposed by one of the present authors. Based on a mathematical model with the estimated population data, we simulate the patterns of population changes in future under some assumptions on the past populations. For a comparison, we also study population changes of bait and eater fish in the lake Biwa.

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