基于环境因子的西北太平洋秋刀鱼剩余产量模型建立

Surplus Production Model for Cololabis saira in the Northwest Pacific Ocean Based on the Environmental Factors

根据1995-2014年西北太平洋秋刀鱼渔业渔获量、单位捕捞努力量渔获量(CPUE)、其产卵场的表温(sea surface temperature,SST)及太平洋年代气候振动(Pacific Decade Oscillation,PDO),分别以PDO因子纳入和不纳入,建立基于SST因子的剩余产量模型,分析SST与PDO对秋刀鱼资源的影响。结果显示,3月产卵场132°30′E、35°30′N的SST与CPUE关系密切,可作为表征资源丰度的因子;加入PDO的影响后,SST与CPUE的关系更加密切。研究表明,秋刀鱼资源量和持续产量的变动受捕捞努力量、产卵场SST和PDO控制。建议在渔业管理中应根据各年海洋环境状况来确定最大可持续产量,并实时调整管理方案。

Pacific saury(Cololabis saira)is a pelagic fish in the Pacific Northwest important economy,its resources changing greatly in different years and being closely related to the marine environment.According to the Northwest Pacific saury,Cololabis saira fisheries catch,fishing catches of effort(CPUE),monthly sea surface temperature of the spawning ground in May from1995to2014andPacific Decade Oscillation,developed a surplus production model for chub mackerel based on SST andPDO,sub account and does not take into account the PDO effect of surplus production model based onSST factor,it analyzes the effects of SST and PDO on Pacific saury resource.Research shows that thespawning ground in March132°30′E,35°30′N,SST and CPUE are closely related,which can be used asa characterization of resource abundance factor.After joining PDO,the relationship between SST andCPUE is more closed.Research shows that saury resources and sustainable yield changes are controlledby the fishing effort,spawning SST and PDO.To this end,it is suggested that the maximum sustainable yield should be determined according to the marine environmental conditions in the fisherymanagement,and the management plan should be adjusted in real time.