臺灣博碩士論文加值系統

本研究透過生產規模大小與地理位置之區隔差異，使用多變量統計分析針對2008年臺灣吳郭魚養殖產業進行經濟評估。生物性變數包含放養密度與活存率，經濟性變數包含成本投入密度及獲利能力。透過Cobb-Douglas生產函數分析結果表明，其成本投入密度會隨生產規模與地理位置之差異而達到顯著影響。因此，發現臺灣南部大規模飼養的吳郭魚養殖場更具有經濟效益。典型相關分析表明，生物性變數與經濟性變數為高度顯著相關。最後，Cobb-Douglas生產函數顯示產業不具有經濟規模效應。

This study aimed to make an economic evaluation of tilapia grow-out farming in Taiwan during the year 2008. Through the use of several statistical analytic methods, it also evaluated the effects of production scale and geographical location on input intensity and different profitability variables. Two sets of variables have been considered. The first set was biological variables, which included stocking density and survival rate. The second set, called economic variables, comprised of the input intensity and varied profitability variables. Indeed several statistical methods of multivariate analysis have been performed. Moreover, the Cobb-Douglas production function was applied to determine the quantitative relationship between the inputs and output. A conclusion was reached that the interaction of production scale and geographical location had significant effect on input intensity variables. On the other hand, only the geographical location and its interaction with production scale had a significant effect on the varied profitability variables. Additionally, the tilapia grow-out farms operated under large scale in the southern Taiwan was found to be more economically efficient. The canonical correlation indicated that biological and economic variables were significantly correlated. Finally, the Cobb-Douglas production function revealed that there were diseconomies of scale.

ACKNOWLEDGEMENTS…………….…………………………………………i
CHINESE ABSTRACT..........................................ii
ENGLISH ABTSRACT…………………………………..…….........iii
LIST OF ABREVIATION INITIALS…………………………..………..iv
LIST OF TABLES............................................ix
LIST OF FIGURES..........................................xii
I. INTRODUCTION............................................1
1.1 Research Problem.......................................1
1.2 Theoretical Framework of the Study....................4
1.3 Objective of the Study.................................5
1.3.1 General Objective....................................5
1.3.2 Specific Objectives..................................5
1.4 Research Hypotheses....................................6
1.5 Limitations of the Study……….……………………….7
II. LITERATURE REVIEW......................................8
2.1 History of World Aquaculture...........................8
2.2 History of Tilapia.....................................8
2.3 Taxonomy of Tilapia....................................9
2.4 Environmental Requirements for Tilapia................10
2.4.1 Salinity............................................10
2.4.2 Water Temperature...................................11
2.4.3 Dissolved Oxygen Concentrations……………….11
2.4.4 Ammonia Concentrations………………...………….12
2.5 Review of Global Tilapia Farming Practices............12
2.6 Development of Technologies to Tilapia Farming........13
2.7 Tilapia Production Systems............................14
2.7.1 Local Small Pond Culture............................14
2.7.2 Commercial Small-Scale Systems......................15
2.7.3 Industrial Aquaculture Systems......................15
2.8 Review of Taiwan Tilapia Farming Practices............16
2.9 Tilapia Global Supply and Trade.......................17
2.9.1 Tilapia: China Market...............................17
2.9.2 Tilapia: USA Market.................................18
2.9.3 Tilapia: European Union Market......................18
2.9.4 Tilapia: Taiwan Market.............................19
III. METHODOLOGY..........................................21
3.1 Description of the Study Area.........................21
3.2 Secondary Data Source.................................22
3.3 Variables Definition..................................22
3.4 Multivariate Analysis.................................23
3.4.1 Multivariate Analysis of Variance (MANOVA)..........24
3.4.2 Principal Component Analysis (PCA)..................24
3.4.3 Discriminant Function Analysis (DFA)................25
3.4.4 Canonical Correlation Analysis (CCA)................26
3.4.5 Cobb-Douglas Production Function....................27
IV. RESULTS AND DISCUSSION................................28
4.1 Descriptive Statistics and Two-way (MANOVA)...........28
4.2 Principal Component Analysis (PCA)....................31
4.3 Discriminant Function Analysis........................35
4.4 Canonical Correlation Analysis (CCA)..................38
4.5 Cobb Douglas Production Function......................40
V. CONCLUSION AND RECOMMENDATIONS.........................42
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