漁具研究へのシステム工学的アプロ-チ-3-"カエシ"付トラップ・モデル
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概要
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Considering the effect of a funnel in the trap gear, trap model equipped with a funnel was described as simultaneous homogeneous difference equation. ?? , where A(t), B(t) are the number of fish at each side of the trap and a, b are entrance constants. Its characteristic was represented as a pulse transfer function. For the experiment, two hundred and fifty carps were prepared and were released at one side of the trap equipped with a funnel. Time series variation of the number of fish was recorded by V.T.R.. According to the result, when fish density was low, the mathematical model was acceptable only to some extent, but when high it was acceptable well.
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