| WANG Jintao,CHEN Xinjun,Kevin W. Staples,CHEN Yong. 2018. A stock assessment for Illex argentinus in Southwest Atlantic using an environmentally dependent surplus production model. Acta Oceanologica Sinica, 37(2):94－101 |
| A stock assessment for Illex argentinus in Southwest Atlantic using an environmentally dependent surplus production model |
| 利用基于环境因子的动态产量模型评估西南大西洋阿根廷滑柔鱼 |
| Received:June 25, 2016 Revised:June 03, 2011 |
| DOI：10.1007/s13131-017-1131-y |
| Key words:Illex argentinus stock assessment Schaefer surplus production model environmental factors Southwest Atlantic |
| 中文关键词: 阿根廷滑柔鱼 资源评估 动态产量模型 环境因子 西南大西洋 |
| 基金项目:The National Natural Science Foundation of China under contract No. NSFC31702343; the Science Foundation of Shanghai under contract No. 13ZR1419700; the Innovation Program of Shanghai Municipal Education Commission under contract No. 13YZ091; the National High-tech R&D Program of China (863 Program) under contract No. 2012AA092303; the Funding Program for Outstanding Dissertations in Shanghai Ocean University; the Funding Scheme for Training Young Teachers in Shanghai Colleges and the Shanghai Leading Academic Discipline Project (Fisheries Discipline); Involvement of Chen Yong was supported by SHOU International Center for Marine Studies and Shanghai 1000 Talent Program. |
| Author Name | Affiliation | E-mail | | WANG Jintao | College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China
Collaborative Innovation Center for National Distant-water Fisheries, Shanghai 201306, ChinaSchool of Marine Sciences, University of Maine, Orono, Maine 04469, USA | | | CHEN Xinjun | College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China
National Distant-water Fisheries Engineering Research Center, Shanghai Ocean University, Shanghai 201306, China
Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources of Ministry of Education, Shanghai Ocean University, Shanghai 201306, China
Collaborative Innovation Center for National Distant-water Fisheries, Shanghai 201306, China | xjchen@shou.edu.cn | | Kevin W. Staples | School of Marine Sciences, University of Maine, Orono, Maine 04469, USA | | | CHEN Yong | School of Marine Sciences, University of Maine, Orono, Maine 04469, USA
College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China | |
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| Abstract: |
| The southern Patagonian stock (SPS) of Argentinian shortfin squid, Illex argentinus, is an economically important squid fishery in the Southwest Atlantic. Environmental conditions in the region play an important role in regulating the population dynamics of the I. argentinus population. This study develops an environmentally dependent surplus production (EDSP) model to evaluate the stock abundance of I. argentines during the period of 2000 to 2010. The environmental factors (favorable spawning habitat areas with sea surface temperature of 16-18℃) were assumed to be closely associated with carrying capacity (K) in the EDSP model. Deviance Information Criterion (DIC) values suggest that the estimated EDSP model with environmental factors fits the data better than a Schaefer surplus model without environmental factors under uniform and normal scenarios. The EDSP model estimated a maximum sustainable yield (MSY) from 351 600 t to 685 100 t and a biomass from 1 322 400 t to 1 803 000 t. The fishing mortality coefficient of I. argentinus from 2000 to 2010 was smaller than the values of F0.1 and FMSY. Furthermore, the time series biomass plot of I. argentinus from 2000 to 2010 shows that the biomass of I. argentinus and this fishery were in a good state and not presently experiencing overfishing. This study suggests that the environmental conditions of the habitat should be considered within squid stock assessment and management. |
| 中文摘要: |
| 西南大西洋阿根廷滑柔鱼，Illex argentinus，巴塔哥尼亚南部群体是重要的经济种类。海洋环境因子在柔鱼资源分布中起着重要的作用。本研究利用基于环境因子的动态产量模型评估2000-2010年的滑柔鱼的资源量。假设海洋环境因子（滑柔鱼产卵场最适宜海表温度占比）影响动态产量模型的参数K，DIC值表明在正态分布和均匀分布下均是基于环境因子的评估模型优于基本的动态产量模型。阿根廷滑柔鱼的最大可持续产量（MSY）在351600吨到685 100吨之间，资源生物量在1322400吨到1 803 000吨之间，其捕捞死亡系数均小于F0.1和FMSY，资源处在良好状态，没有遭受过度捕捞。本研究为应用环境因子在柔鱼类的资源评估与管理提中供了科学的参考方法。 |
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