Anchovies are migratory fish and adult individuals migrate in group from the sea into the river every year because of reproductive needs. TheYangtze River is the largest river in China, with rich food and fish species...Anchovies are migratory fish and adult individuals migrate in group from the sea into the river every year because of reproductive needs. TheYangtze River is the largest river in China, with rich food and fish species, hence, the Yangtze River would be an ideal habitat for growth and reproduction of anchovy. In this pa- per, based on fishing log data of anchovy in Jiangsu section of the Yangtze River, realted analysis was conducted in digital map using statistical software and GIS. From 2008 to 2011, the number of anchovy fishing vessels and fishing days in Jiangsu section remained stable, but the fishing volume and economic profit of single-vessel fluctuated constantly. This study provides references and advices for plan and management of anchovy fishery resource to administrative department.展开更多
[Objective] The paper was scientifically evaluate the potential fishery productivity of Lihu using GIS technology.[Method] The evaluation of potential fishery productivity in Lihu was based on GIS and AHP according to...[Objective] The paper was scientifically evaluate the potential fishery productivity of Lihu using GIS technology.[Method] The evaluation of potential fishery productivity in Lihu was based on GIS and AHP according to the characteristics of fisheries resources in Lihu Lake.The evaluation system included 3 sub-models including water quality,biodiversity and hydrological condition,which totally had 10 indexes.Judgment matrix was constructed based the advices of professors of fisheries resources,and the indicator’s weight were calculated by the process of AHP.The ranking distributing map of potential fishery productivity in Lihu was obtained by the model of raster analysis,raster calculator,spatial overlay and classification models of ARC/INFO.[Result] Potential fishery productivity of Lihu was divided into 4 grades in term of higher,high,general and low,and which covered 2.643 3,3.844 8,1.121 4 and 0.400 5 hm2,respectively.[Conclusion] The study provided theoretical basis for ecological reconstruction of Lihu Lake.展开更多
利用VB提供的串口通讯控件(Mscomm32.ocx),把GPS接收机接收到的数据信息实时显示在MapX的活动图层(animation layers)上,实现与其它Windows下的用户程序进行动态数据交换(dynamic data exchange),达到动态实时显示和监测的目的。将此技...利用VB提供的串口通讯控件(Mscomm32.ocx),把GPS接收机接收到的数据信息实时显示在MapX的活动图层(animation layers)上,实现与其它Windows下的用户程序进行动态数据交换(dynamic data exchange),达到动态实时显示和监测的目的。将此技术运用到渔业资源监测,通过编程技术把显示在活动图层的监测船只航迹转化成区域,准确计算出流置网的拖曳水域面积,更加精确估算出渔业资源量。展开更多
基金Supported by the R&D Special Fund for Public Welfare Industry(201203086)Special Financial Fund of Ministry of Agriculture(6125005)Central Public-interest Scientific Institution Basal Research Fund(2011JBFC04)~~
文摘Anchovies are migratory fish and adult individuals migrate in group from the sea into the river every year because of reproductive needs. TheYangtze River is the largest river in China, with rich food and fish species, hence, the Yangtze River would be an ideal habitat for growth and reproduction of anchovy. In this pa- per, based on fishing log data of anchovy in Jiangsu section of the Yangtze River, realted analysis was conducted in digital map using statistical software and GIS. From 2008 to 2011, the number of anchovy fishing vessels and fishing days in Jiangsu section remained stable, but the fishing volume and economic profit of single-vessel fluctuated constantly. This study provides references and advices for plan and management of anchovy fishery resource to administrative department.
基金Special Funds for Basic Research and Operating Expenses of Central Nonprofit Research Institutes(2011JBFC04)Special Research Project of Public Service Sectors(agriculture)(200903048-03)Special Finance of Department of Agriculture(6125005)~~
文摘[Objective] The paper was scientifically evaluate the potential fishery productivity of Lihu using GIS technology.[Method] The evaluation of potential fishery productivity in Lihu was based on GIS and AHP according to the characteristics of fisheries resources in Lihu Lake.The evaluation system included 3 sub-models including water quality,biodiversity and hydrological condition,which totally had 10 indexes.Judgment matrix was constructed based the advices of professors of fisheries resources,and the indicator’s weight were calculated by the process of AHP.The ranking distributing map of potential fishery productivity in Lihu was obtained by the model of raster analysis,raster calculator,spatial overlay and classification models of ARC/INFO.[Result] Potential fishery productivity of Lihu was divided into 4 grades in term of higher,high,general and low,and which covered 2.643 3,3.844 8,1.121 4 and 0.400 5 hm2,respectively.[Conclusion] The study provided theoretical basis for ecological reconstruction of Lihu Lake.
文摘利用VB提供的串口通讯控件(Mscomm32.ocx),把GPS接收机接收到的数据信息实时显示在MapX的活动图层(animation layers)上,实现与其它Windows下的用户程序进行动态数据交换(dynamic data exchange),达到动态实时显示和监测的目的。将此技术运用到渔业资源监测,通过编程技术把显示在活动图层的监测船只航迹转化成区域,准确计算出流置网的拖曳水域面积,更加精确估算出渔业资源量。
