基于理想自由分布理论对CPUE与渔业资源关系的探讨——以我国近海鲐灯光围网渔业为例  

The relationship between CPUE and fish abundance based on ideal free distribution theory:take the large light purse seine fishery of mackerel in Yellow Sea and East China Sea as an example

作　　者：易明华[1,2] 官文江[3] 陈新军[3] 

机构地区：[1]北京大学数字中国研究院,北京100871 [2]江西省基础地理信息中心,南昌330046 [3]上海海洋大学大洋生物资源开发和利用上海高校重点实验室,上海201306

出　　处：《大连水产学院学报》2009年第4期325-330,共6页Journal of Dalian Fisheries University

基　　金：国家科技支撑计划项目(2006BAD09A05);大洋生物资源开发与利用上海市高校重点实验室开放基金资助项目(KF200803);上海市重点学科建设项目(S30702)

摘　　要：单位捕捞努力量渔获量(CPUE)常用作渔业资源的丰度指数,通常假定CPUE与渔业资源量存在正比关系,但基于商业性捕捞数据的CPUE与渔业资源量的关系受渔民捕捞行为的影响。作者基于理想自由分布理论和中国大型鲐灯光机轮围网捕捞数据,对南、北渔场捕捞量与捕捞努力量的空间分布关系进行了分析。结果表明:北渔场没有显著偏离理想自由分布理论的预测结果,即北渔场的CPUE存在被均匀化的现象,CPUE不能正确反映渔业资源量的大小;南渔场虽然显著偏离理想自由分布理论的预测结果,但当捕捞努力量大于26网次时,CPUE随捕捞努力量的增加而减少,这表明南渔场也存在干扰竞争,南渔场的CPUE与渔业资源量的关系被弱化。因此,在应用商业捕捞数据进行渔业资源研究时,需注意CPUE在空间被均匀化的现象。Catch per unit effort （CPUE） remains a common index of abundance in fisheries and CPUE in proportion to fish abundance is always taken as a valid assumption, but the relationship between CPUE and fish abundance derived from fishery dependent data will be influenced by behavior of fishermen. In this paper, we analyze the relationship between the proportion of catch and effort allocated to different location in same time based on ideal free distribution theory and data in the large light purse seine fishery of mackerel in Yellow Sea and East China Sea. The results showed the prediction of ideal free distribution was approximately supported in north fishing ground, i. e. to a certain extent, the CPUE was equalized and was independent of the fish abundance, and, on the contrary, the effort may be in proportion to the abundance. Although the prediction was not supported in south fishing ground, the CPUE decreased with the standardized effort increasing as its value was larger than 26, which implied the interference competition was present and the relationship between CPUE and fish abundance may be weakened, even break down. Finally, we suggest we need to keep an eye on CPUE equalized when using the fish dependent data to research dynamic of fish resource .

关 键 词：理想自由分布 CPUE 渔业资源量 

分 类 号：S931.4[农业科学—渔业资源]