A Simulation Study to Assess Impacts of Habitat-Dependent Parameters of Surplus Production Model on Stock Assessment of Chilean Jack Mackerel in the Southeast Pacific Ocean  

作　　者：LI Gang CAO Yangming CAO Jie CHEN Xinjun ZOU Xiaorong 

机构地区：[1]College of Marine Science,Shanghai Ocean University,Shanghai 201306,China [2]National Engineering Research Center for Oceanic Fisheries,Shanghai 201306,China [3]The Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources,Ministry of Education,Shanghai 201306,China [4]Department of Applied Ecology,Center for Marine Sciences and Technology,North Carolina State University,Morehead City,NC 28557,USA

出　　处：《Journal of Ocean University of China》2025年第1期169-181,共13页中国海洋大学学报(英文版)

基　　金：supported by the National Key Research and Development Program of China(No.2019YFD0901404)。

摘　　要：Pelagic fish are the most abundant species in upwelling regions,contributing 25%of total global fisheries production.Climate-driven changes in the marine environment play a crucial role in their population dynamics.Using Chilean jack mackerel(Trachurus murphyi)as an example,this study conducted simulations to quantify the impacts of environmental variations on the stock assessment.A habitat-based surplus production model was developed by integrating suitable habitat area into the model parameters carrying capacity(K)and intrinsic growth rate(r),with a suitable habitat area serving as the proxy for the environmental conditions for Chilean jack mackerel in the Southeast Pacific Ocean.The dynamics of Chilean jack mackerel stock and fisheries data were simulated,and four assessment models with different configurations were built to fit simulated data,with or without considering environmental effects.The results indicated that Joint K-r model,which integrated both parameters with the suitable habitat area index,outperformed the others by coming closest to the‘true'population dynamics.Ignoring habitat variations in the estimation model tended to overestimate biomass and underestimate harvest rate and reference points.Without observation and process error,the results were estimated with bias,while FMSY is relatively sensitive.This research illustrates the importance to consider random errors and environmental influences on populations,and provides foundation guidelines for future stock assessment.

关 键 词：Trachurus murphyi simulations suitable habitat area stock assessment ERRORS Southeast Pacific Ocean 

分 类 号：P73[天文地球—海洋科学]