混獲為進行捕撈作業中無法完全避免的問題，隨著混獲的發生，可能產生丟棄的現象，非目標物種的丟棄不僅在經濟面產生損失，同時亦可能對資源存量造成傷害。而當物種間存在互動關係下，混獲與丟棄衍生的經濟成本與對資源存量的損害程度亦趨複雜。
本研究將以物種間可能存在的互動關係出發，探討不同生物互動下，對於捕撈者最適決定與資源存量的可能影響。

By-catch is an unavoidable problem in fishery, and the occurrence of by-catch may lead to the phenomenon of discarding. Discarding of non-targeted species will not only result in the losses in economic, but may also damage the resource stock. As the interaction between species exists, the economic costs and the degree of damage derive from by-catch and discarding will become increasingly complicated.
The research will start from the assumption of possible interactions between species, investigating that under different interactions between species, the possible influence to the optimal decision of fishermen and resource stocks.

第一章 緒論 1
第一節 研究動機 1
第二節 研究目的 4
第三節 論文章節安排 4
第二章 文獻回顧 5
第三章 不同漁場下生物互動影響的混獲與丟棄 11
第一節 模型假設與建構 11
第二節 混獲物種不完全丟棄 15
一、 開放式(Open Access)漁場 15
二、 社會最適(Social Optimum)漁場 23
第三節 混獲物種完全丟棄 27
一、 開放式(Open Access)漁場 27
二、 社會最適(Social Optimum)漁場 31
第四章 結論與建議 35
參考文獻 37
附錄 41
附錄一：不完全丟棄下，社會最適漁場 41
附錄二：完全丟棄下，社會最適漁場 44

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