|Abstract: ||本論文針對大閘蟹之產業經濟進行檢視，以期瞭解台灣大閘蟹養殖產業發展之關鍵因素，作為產業發展之參考。 研究方法係針對養殖過程之生物性及經濟性資訊進行田野調查，應用統計原理進行分析。結果顯示，台灣大閘蟹平均放養密度為1,996隻/分。養殖週期約7.9個月，活存率平均28.2％。生產經濟方面，生產成本平均每分地投入145,529元，放養密度≧2,500隻/分的生產成本（208,495元/分）最高、放養密度<1,500隻/分（107,931元/分）最低。生產成本以人事成本（92,279元/分）為最大宗，餌料成本（26,407元/分）次之。獲利方面，平均每分地總收益233,526元、淨收益87,997元、益本比2.00。整體而言，獲利能力以放養密度1,500～2,499隻/分的益本比2.40最高、放養密度≧2,500隻/分的益本比1.72最低。 台灣大閘蟹養殖產業發展主要問題在於活存率不佳及養殖成本管理不理想等因素。未來期望能找出最適當的放養密度、提升養殖技術、有效控管養殖成本及建立養殖大閘蟹的標準操作流程，以提升台灣大閘蟹養殖產業的競爭力。|
This research will focus on the Chinese Mitten Crab industry in Taiwan and take a closer look at the issues to search the key factor of the development. As a reference for industry development. Study the biological and economic information for the farming process by questionnaire survey, and apply a statistical theory to analysis. The results show that the average stocking density of the Chinese mitten crabs in Taiwan was 1,996 crabs/ha. The average culture cycle was 7.9 month and the average surival rate was 28.2％. According to the view of productice economics, the average cost about NTD 145,529 per ha, and NTD 208,495 per ha in stocking density≧2,500 crabs per ha as the cost highest and stocking density <1,500 crabs per ha as the cost lowest about NTD 107,931 per ha. The labor costs( NTD 92,279 per ha) was the major production in the unit costs of input and the feed cost( NTD 26,407 per ha) followed. Based on the profitability, the average total revenue was NTD 233,526 per ha, and NTD 87,997 per ha in net revenue. The benefit-cost ratio was 2.00. Overall, the profitability was highest at the stocking density 1,500～2,499 per ha (2.40) and the stocking density≧2,500 per ha 1.72 was lowest. The Chinese Mitten Crab industry in Taiwan development main problem is poor survival rate and poor management of farming costs. Decision on optimal stocking densities, improvements in farming technology, effective management of farming costs and establishmet of standard operating procedures for the Chinese mitten crabs farming. As the development to enhance the competitiveness of the Chinese Mitten Crab industry in Taiwan.