【作者】 杜建国； 卢振彬； 陈明茹； 杨圣云；

【Author】 DU Jian-guo1,LU Zhen-bin2,CHEN Ming-ru3,YANG Sheng-yun3 (1.Department of Oceanography,Xiamen University,Xiamen 361005,China; 2.Third Institute of Oceanography,State Oceanic Administration,Xiamen 361005,China; 3.Fisheries Research Institute of Fujian,Xiamen 361012,China)

【机构】 厦门大学海洋学系、生物资源开发与保护福建省重点实验室； 国家海洋局第三海洋研究所； 福建省水产研究所；

【摘要】 以2005～2006年周年逐月采集台湾海峡南部底拖网渔获的花斑蛇鲻样品进行群体结构和生长与死亡的研究,并与此前的渔获群体结构进行比较探讨其种群变化趋势及管理策略。结果表明:2005～2006年花斑蛇鲻群体的L∞为563.06 mm,W∞为1804.98g,k为0.2328,t0为-0.5588龄,tr为3.8857龄。总死亡系数为1.1014,自然死亡系数为0.5365,捕捞死亡系数为0.5649。与历史资料相比,渔获群体发生了个体小型化、结构低龄化、性成熟提早等生态学变化。这些变化与该渔场自1995年以来不断加大捕捞的投入和渔获量的产出且大量捕杀幼鱼,开发比率高达0.5129有关。因此必须加强对渔业的管理力度,严格控制开捕规格。在当前状况下,应采取"负增长"的策略,以期渔业资源得到有效恢复,实现海洋捕捞业的可持续发展。更多还原

【Abstract】 According to the biological data of Saurida undosquamis collected in Southern Taiwan Strait during 2005~2006,the population structure,parameters of growth and mortality are studied.Compared with previous studies,variation tendency in population structure of Saurida undosquamis was discussed.The growth parameters of Saurida undosquamis were:L∞=536.06 mm,W∞=1804.98 g,k=0.2328,t0= -0.5588 (t0 is the age when the theory fork length is 0),tr=3.8857(tr is the age of the inflexion point of body weight growth),the rates of total mortality,natural mortality and fishing mortality were found to be 1.1014,0.5365 and 0.5649,respectively,and the exploitation rate was 0.5129.Compared with the population structure of stocks in 1995,it is evident that the adults were premature in fast growth while they became smaller and younger,it may be caused by the reasons that the input-output of fishing in this area was enhanced,and the actual catch of Saurida undosquamis annually has exceeded their maximum sustained yield and maximum sustained efforts.Therefore,the protection and management of the fish resources should be intensified,and powerful measures should be taken to control the fishing efforts and catches,especially the capture size,thus to restore the fishery resources,and achieve sustainable development and sustainable use of fish stocks.更多还原