作 者：
杨嘉樑;黄洪亮;吴越;饶欣;陈勇;黄嘉祺
单 位：
中国水产科学研究院东海水产研究所;上海开创远洋渔业有限公司
关键词：
广义可加模型(GAM);智利竹筴鱼;捕捞效率;时空因子;捕捞因子
摘 要：
为了探讨异常海洋环境年份智利竹筴鱼(Trachurus murphyi)捕捞效率及其相关影响因素,利用广义可加模型(GAM),对"开富号"2014年和2015年东南太平洋智利竹筴鱼的渔业生产统计数据进行分析研究。结果表明:(1)智利竹筴鱼的渔场主要位于26°S~28°S、74°W~76°W和37°S~47°S、78°W~93°W的海域内,其中最佳捕捞海域为38°S~47°S、87°W~93°W;最佳捕捞时间为4~6月;(2)放网的持续时间、月份、网口高度、网位、放网位置的经纬度及拖网速度对智利竹筴鱼捕捞效率的影响显著,而曳纲长度、网口水平扩张与智利竹筴鱼捕捞效率间的相关性则较弱;(3)影响智利竹筴鱼捕捞效率的因子按影响程度高低的顺序依次为放网的持续时间、月份、网口高度、放网经度、放网纬度、拖网速度、网位。
译 名：
Impact factor analysis of fishing efficiency of Trachurus murphyi in abnormal marine environment
作 者：
YANG Jia-liang;HUANG Hong-liang;WU Yue;RAO Xin;CHEN Yong;HUANG Jia-qi;Key Laboratory of East China Sea and Oceanic Fishery Resources Exploitation of Ministry of Agriculture,East China Sea Fisheries Research Institute,Chinese Academy of Fishery Science,Engineering Technology Research Center of Marine Fishing;Shanghai Kaichuang Deep Sea Fisheries Co.Ltd;
关键词：
GAM;;Trachurus murphyi;;fishing efficiency;;spatio and temporal factor;;fishing factor
摘 要：
The relationship between environmental factors in abnormal marine environment and fishing efficiency of Chilean jack mackerel( Trachurus murphyi) was studied. The other impact factors such as fishing parameters,spatial and temporal parameters had received little attention in related research. It is generally known to all that the El Nino phenomenon occurred in 2015 worldwide,in order to explore the fishing efficiency of Chilean jack mackerel and relevant factors in abnormal marine environment,the fishing data of Chilean jack mackerel from 2014 to 2015 in fishing vessel "KAI FU HAO"were analyzed by using generalized additive models( GAM). The GAM is a better fitting method,which could deal with data whose relationship is nonlinear with each other in fishing research. The results showed:( 1) The fishing ground of Chilean jack mackerd in the ocean was located in 26°S- 28°S,74°W- 76°W and 37°S- 47°S,78°W- 93°W; the best fishing ground was located in 37°S- 47°S,78°W- 93°W; the best fishing months were April,May and June in 2014- 2015;( 2) The net time,month,vertical opening,net position,longitude,latitude and speed had significant effects on fishing efficiency of Chilean jack mackerel,and the warp length and horizontal spreading had poor correlation with fishing efficiency of Chilean jack mackerel;( 3) The results of stepwise GAM showed that the order of the seven variables affecting the fishing efficiency of Trachurus murphyi in sequence of importance was net time,month,vertical opening,longitude,latitude,speed and net position.
