剩余产量模型评估南海北部鲔资源  

Stock assessment of Euthynnus affinis in the northern South China Sea by surplus production model

作　　者：吴永烈 罗进辉 陈文洋 冯波[1,2,3] WU Yonglie;LUO Jinhui;CHEN Wenyang;FENG Bo(Fisheries College,Guangdong Ocean University,Zhanjiang Guangdong 524088,China;Southern Marine Science and Engineering Guangdong Laboratory(Zhanjiang),Zhanjiang Guangdong 524025,China;Guangdong Provincial Far Sea Fisheries Management and Fishing Engineering Technical Research Center,Zhanjiang Guangdong 524088,China)

机构地区：[1]广东海洋大学水产学院,广东湛江524088 [2]南方海洋科学与工程广东省实验室(湛江),广东湛江524025 [3]广东省南海深远海渔业管理与捕捞工程技术研究中心,广东湛江524088

出　　处：《渔业信息与战略》2023年第4期291-298,共8页Fishery Information & Strategy

基　　金：国家重点研发计划(2018YFD0900906)。

摘　　要：根据2008—2020年渔港渔业生产抽样调查数据,开展了南海北部鲔(Euthynnus affinis)资源的评估,统计发现,南海北部的鲔被围网、罩网、刺网和拖网捕捞,分别占其总产量的69.01%、10.98%、17.77%和2.23%。采用剩余产量模型对12个单位捕捞努力量渔获量数据进行了分析。平衡Schaefer模型计算的最大可持续产量为56 493.19 t,平衡Fox模型计算的最大可持续产量为49 888.98 t,非平衡产量模型计算的最大可持续产量为50 012.00 t。罩网201~300 kW、围网50~100 kW和刺网151~200 kW 3种作业方式与功率段在2020年被判断为捕捞努力量水平投入过度,即捕捞型过度捕捞,但这3种作业方式与功率段的产量只占总产量的13.73%,因此,当前鲔资源的利用状况整体上较为乐观。综合推断南海北部鲔资源总可捕捞量可设定在4.9×10^(4)t。According to the stratified sampling survey data of fishery production from fishing ports along the northem South China Sea from 2008 to 2020,the biomass of Euthynnus affinis was assessed.The production of E.affinis mainly consisted of purse seine,falling net,gill net and trawl net,accounting for 69.01%,10.98%,17.77%and 2.23%of the total catch,respectively.Twelve CPUE data were analyzed by surplus production models.The maximum sustainable yield was 56493.19 t inferred by equilibrium Schaefer model.The maximum sustainable yield was 49888.98 t inferred by equilibrium Fox model.The maximum sustainable yield was 50012.00 t inferred by non-equi librium production model.Overfishing occurred in falling net with main power of 201-300 kW,purse seine with main power of 50-100 kW and gillnet with main power of 151-200 kW.Overfishing did not occur and the utilization level was not beyond the optimum level in other fishing methods and main power segments.The total allowable catch of E.affinis can be set as 490000 t in the northern South China Sea at present.

关 键 词：鲔 南海北部 剩余产量模型 总允许捕捞量 

分 类 号：P745[天文地球—海洋生物学] S937.3[天文地球—海洋科学]