首页|增殖放流背景下东海北部近海大黄鱼种群资源状况

增殖放流背景下东海北部近海大黄鱼种群资源状况

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大黄鱼是东海北部近海最重要的经济鱼类之一。为探究规模增殖放流背景下大黄鱼资源状况，根据2021年东海北部近海渔业资源调查资料，对1 821尾大黄鱼体长、体质量等生物学测定。利用ELEFAN Ⅰ估算生长、死亡参数，采用体长结构的实际种群分析法估算大黄鱼资源量并通过不完全β函数渔获量方程动态综合模型评估资源的利用状况。结果表明:在 ELEFAN Ⅰ 技术拟合下的 Von Bertalanffy 生长方程各参数为K=0。50、L∞=481 mm、t0=-0。25;M=0。42、Z=2。32、F=1。90、E=0。82;大黄鱼资源处于过度开发状态，计算得出东海北部近海大黄鱼年平均资源量重量为4 804。24 t，年平均资源尾数约为8。85×107尾。根据Beverton-Holt模型绘制的等渔获量曲线图中渔业现行点(Ft=1。90，tc=0。34 a)位于最适产量区域之下，处于捕捞压力过大或捕捞过早状态。针对目前低龄化、小型化为主的大黄鱼群体，建议增大开捕规格，旨在为大黄鱼资源可持续开发和管理提供资料，为大黄鱼资源修复及增殖放流工作提供科学依据。
Population Resource of Larimichthys crocea in Inshore Waters of Northern East China Sea Under the Background of Releasing Stock Enhancement
Larimichthys crocea is one of the most important economic fish in inshore waters of northern East China Sea.In order to explore the resource status of L.crocea under the background of releasing stock enhancement,according to the survey data of fishery resources in inshore waters of northern East China Sea in 2021,the body length and weight of 1 821 L.crocea were biologically measured.The growth and death pa-rameters were estimated by ELEFAN I.,and the actual stock analysis method based on body length structure was used to estimate the resources of L.crocea.The resource utilization was evaluated by the dynamic com-prehensive model of the incomplete β function catch equation.The results showed that the parameters of Von Bertalanffy growth equation under ELEFAN I.technology fitting were K=0.50,L∞=481 mm,t0=-0.25,M=0.42,Z=2.32,F=1.90,E=0.82,and the resources of L.crocea were under the state of overexploitation.The annual average resource weight of L.crocea in inshore waters of northern East China Seain stable state was calculated to be 15 177.44 t,and the annual average resource tail was about 2.80×108.The fishery current point(Ft=1.90,tc=0.34 a)in the isocatch curve plotted according to the Beverton-Holt model was below the optimum yield area,under excessive fishing pressure or fishing prematurely.In view of the current L.crocea population that is mainly young and miniaturized,it is proposed to increase the catchable size,aiming to provide data for the sustainable development and management of L.crocea resources,and provide scientific basis for the restoration and releasing stock enhancement of L.crocea resources.

Larimichthys croceareleasing stock enhancementstatus of resourcesin inshore waters of northern East China Seayield per recruitment

张秋宏、孙浩奇、周永东、蒋日进、徐开达、徐国强、朱凯、李霞芳、蒋永生、渠遥、赵芃

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浙江海洋大学海洋与渔业研究所,浙江舟山 316021

浙江省海洋水产研究所,浙江省海洋渔业资源可持续利用技术研究重点实验室,农业农村部重点渔场渔业资源科学观测试验站,浙江舟山 316021

大黄鱼 增殖放流 资源状况 东海北部近海 单位补充量渔获量

国家重点研发计划"蓝色粮仓科技创新"重点专项浙江省重点研发计划浙江省渔业资源调查专项

2020YFD09008042019YFD09012042020C02004HYS-CZ-202314

2024

浙江海洋大学学报(自然科学版)
浙江海洋学院

浙江海洋大学学报(自然科学版)

影响因子：0.394
ISSN：2096-4730
年,卷(期)：2024.43(2)
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