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The influence of spatially variable and connected recruitment on complex stock dynamics and its ecological and management implications

文献类型： 外文期刊

作者： Guan, Lisha 1 ; Chen, Yong 1 ; Wilson, James A. 1 ; Waring, Timothy 1 ; Kerr, Lisa A. 5 ; Shan, Xiujuan 2 ;

作者机构： 1.Univ Maine, Sch Marine Sci, Orono, ME 04469 USA

2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Fisheries Sci & Food Prod Proc, Qingdao 266237, Shandong, Peoples R China

3.Chinese Acad Fishery Sci, Minist Agr, Key Lab Sustainable Dev Marine Fisheries, Qingdao 266071, Shandong, Peoples R China

4.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, Shandong Prov Key Lab Fishery Resources & Ecol En, Qingdao 266071, Shandong, Peoples R China

5.Gulf Maine Res Inst, 350 Commercial St, Portland, ME 04101 USA

期刊名称：CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES （ 影响因子：2.595； 五年影响因子：3.051 ）

ISSN： 0706-652X

年卷期： 2019 年 76 卷 6 期

页码：

收录情况： SCI

摘要： To evaluate the influence of spatially variable and connected recruitments at spawning component scale on complex stock dynamics, a typical agent-based complex stock was modeled based on the Atlantic cod (Gadus morhua) stock in the Gulf of Maine. We simulated three scenarios with different degrees of connectivity (i.e., individual exchange) between the spatially variable recruitments of 36 spawning components within four subpopulations under the stock. Subsequently, the temporal trends were compared for different scenarios in age-1 recruitment, spawning stock biomass, and local depletion proportion of the overall complex stock and the individual subpopulations. Results show that increased recruitment connectivity from 0.1-0.2 to 0.6-0.8 between various components tends to increase the productivity and stability of a complex stock at local and global scales and reduce the proportion of depleted components due to overfishing. Moreover, depletions of less productive components may occur without a substantial reduction in the overall complex stock biomass and recruitment.

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