罗非鱼生物经济学模型研究
毕业论文关键词：罗非鱼；生物经济学模型；经济效益；子模型
Research on bio-economic model of Tilapia
Abstract：In recent years,the consumption of tilapia in the world is on the rise.It is one of the most important cultured fish in the world, and it is also the first global aquaculture species.Over the past few years,it has been affected by natural disasters,frequent diseases,rising production costs and other factors. Chinese tilapia breeding profits decreased and production risk increased.Therefore,it is of great significance to study the economic benefits of tilapia pond farming and its influencing factors to ensure the healthy, stable and sustainable development of tilapia industry.In this study, the study of tilapia bio-economic model was designed to provide a theoretical basis for the prediction of tilapia aquaculture production and the formulation of management strategy.In this paper, we construct the biological economic model,which consists of biological, economic and technological submodels,which explain the interaction between different submodels.The model provides reliable information on breeding costs,feed conversion rate,feed volume, etc. in the culture cycle.There are six kinds of conditions,two kinds of stocking sizes,three kinds of stocking densities, and decided to maximize the profits of each case,by fish best harvest time and sizes. The results showed that at week 14, the GIFT reached the highest point of weight gain, after which the weight gain was reduced and the feed conversion rate was changed from low to high.So as to obtain the largest economic benefit of the experimental group.
Key words: tilapia；bioeconomic model；economic benefit；submodel
目 录
摘要1
关键词1
Abstract1
Key words1
绪论1
1 生物经济模型研究2
1.1 生物经济模型的含义2
1.2 生物经济模型在水产养殖中的研究现状3
1.2.1 生物经济模型在水产养殖中的研究进展3
1.2.2 生物经济模型在水产养殖中的问题4
1.2.3生物经济模型在水产养殖中的研究展望4
2 罗非鱼生物学经济模型研究5
2.1 材料与方法5
2.1.1 试验用鱼5
2.1.2 试验池塘5
2.2 试验方法5
2.2.1 密度设置5
2.2.2 饲喂5
2.2.3 数据测量5
2.3 模型构建5
2.3.1 生物子模型5
2.3.2 技术子模型6
2.3.3 经济子模型6
3 结果与分析7
3.1 模型拟合结果评价7
3.1.1 生物子模型7
3.1.2 技术子模型9
3.1.3 经济子模型10
3.2 模型最优组合分析10
4 总结与建议10
致谢11
参考文献11
罗非鱼生物经济学模型研究
罗非鱼，鲈形目，慈鲷科，罗非鱼属，是原产于热带、亚热带暖水性鱼类,具有繁殖力强、生长速度快、耐粗食、抗病力强等优点，是当前淡水养殖业的重要养殖品种之一。随着全球人口不断增长，人们的食品需求也日益增长，对世界食品产出和质量提出了新的要求。鱼类在2001年被联合国营养组织定为人类21世纪优质蛋白来源。由于环境污染、资源衰退等因素的影响，全球捕捞产量不断下降。随着我国人民生活水平的提高，人民膳食结构越来越追求健康，对动物蛋白质的需求日渐增大，对水产品的需求也不断增大。为满足人们日益增长的食品需求，水产养殖的发展越来越受到重视。在众多的养殖品中,罗非鱼以其肉质厚、骨刺少,便于加工保鲜、富含多种不饱和脂肪酸等优点被公认是健康食品，被称为“21世纪之鱼”，在全球的消费量呈上升趋势，是第一个全球性的水产养殖品种[1]。中国罗非鱼养殖业发展迅速，产量从2000年的62.9×104t增加到2009年的125.8×104t，年均增长率为11.1%，稳居世界首位，是中国最具国际竞争实力的品种，也是最具产业化发展条件的品种[2]。20世纪中叶以来，水产养殖业为满足全球食品需求作出了重要贡献。2015年，全国水产品总产量6699.65万吨，养殖产量占比为73.70%，实际产量为4937.90吨，养殖产量远超捕捞产量。2015年，水产养殖总产值占渔业总产值的73.04%，实际产值为8274.78亿元，养殖产值也远超捕捞产值[3]。由于罗非鱼在全球的消费量呈上升趋势，是第一个全球性的水产养殖品种。而我国是世界上最大的罗非鱼养殖生产、出口和消费国家，因此在全球竞争化浪潮的前提下对于如何提高罗非鱼养殖的经济效益提出了需求。