福建灯光围网作业捕捞能力的因子分析  

Factor analysis on fishing capacity of light-purse seine along Fujian coastal line area

作　　者：苏新红[1] 沈长春[1] 郑奕[2] 黄前程 

机构地区：[1]福建省水产研究所,福建厦门361012 [2]上海水产大学信息学院,上海200090 [3]中华人民共和国泉州渔港监督处,福建泉州362000

出　　处：《中国水产科学》2006年第1期59-64,共6页Journal of Fishery Sciences of China

基　　金：福建省海洋环境与渔业资源监测中心资助项目(闽海渔科0354)

摘　　要：在渔业生产过程中影响捕捞能力发挥的因素很多,给捕捞能力的估算造成困难。本研究采用因子分析法对影响灯光围网捕捞能力发挥的13个指标变量进行分析,结果表明,可将影响灯光围网捕捞能力发挥的诸多因素归并为渔船作业能力、综合捕捞技术、作业天数、水下灯功率等4个公共因子;它们在围网捕捞作业过程中所发挥的作用由大到小依次为渔船作业能力因子、综合捕捞技术因子、作业天数因子、水下灯功率因子。本研究还计算和讨论了各样品的因子得分,通过各因子的得分和综合得分,可对各样品的捕捞能力发挥情况进行综合评价,为渔业生产和管理提供理论参考。[中国水产科学,2006,13(1):59-64]The existence of over fishing in the worldwide fisheries is growing deep concern. It is negatively impacting on the sustainable use of many fishery resources. In order to understand and manage the fishing capacity better, it is necessary to study how the various factors in a fishing process affect the fishing capacity. This research addresses the factor analysis on fishing capacity of light-purse seine. There are many factors that affect fishing capacity utilization of light-purse seine in the process of fishing operation. As a resuit, it causes much trouble for estimating the fishing capacity. To investigate this matter, a series of surveys were carried out along Fujian coastal line area, southeast China, where the light-purse seine was a characteristic fishing method. Traditionally, fishing capacity was estimated by single factor such as power of vessel engine or gross tonnage and so on, but the single factor measure could not completely furnish the information of fishing capacity. Although multiple factors measure sometimes was used to estimate fishing capacity, it still had some problems, for example, massive data were always difficult to process. Therefore, a reduction on factor numbers was needed when multifactor was adopted to measure the fishing capacity of gears. The objective of this study was to deal with the data reduction. For this study, we randomly sampied 23 cases from the population of light-purse seine in the Quanzhuo region, southeast Fujian, in 2004, where light-purse seine fishing was one of the most important fishing methods. Then 13 observed variables for each case were selected for the factor analysis. By adopting the factor analysis approach, we first investigated the correlation and interaction among the 13 variables by calculating the correlation matrix R and the rotated factor loading matrix A＇, and then analyzed how each observed variable affected the fishing capacity and how well the hypothesized factors explained the observed data by their eigenvalues ai, the percent of variance a

关 键 词：灯光围网 捕捞能力 因子分析 综合评价 福建沿海 

分 类 号：S931[农业科学—渔业资源]