Impacts of the El Ni?o event on the population dynamics of Ommastrephes bartramii in the Northwest Pacific Ocean

doi:10.11964/jfc.20200812363

Home > Archive>Volume 46, Issue 8, 2022 >1345-1356. DOI:10.11964/jfc.20200812363

Impacts of the El Ni?o event on the population dynamics of Ommastrephes bartramii in the Northwest Pacific Ocean
DOI:
                        10.11964/jfc.20200812363
                    
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                        SUI XinSUI Xin
College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China;East China Sea Fishery Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200090, China
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WANG JintaoWANG Jintao
College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China;Key Laboratory of Oceanic Fisheries Exploration, Ministry of Agriculture and Rural Affairs, Shanghai Ocean University, Shanghai 201306, China;National Engineering Research Center for Oceanic Fisheries, Shanghai Ocean University, Shanghai 201306, China;Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Ministry of Education, Shanghai Ocean University, Shanghai 201306, China;Scientific Observing and Experimental Station of Oceanic Fishery Resources, Ministry of Agriculture and Rural Affairs, Shanghai Ocean University, Shanghai 201306, China
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CHEN XinjunCHEN Xinjun
College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China;Key Laboratory of Oceanic Fisheries Exploration, Ministry of Agriculture and Rural Affairs, Shanghai Ocean University, Shanghai 201306, China;National Engineering Research Center for Oceanic Fisheries, Shanghai Ocean University, Shanghai 201306, China;Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Ministry of Education, Shanghai Ocean University, Shanghai 201306, China;Scientific Observing and Experimental Station of Oceanic Fishery Resources, Ministry of Agriculture and Rural Affairs, Shanghai Ocean University, Shanghai 201306, China
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LEI LinLEI Lin
College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China;Key Laboratory of Oceanic Fisheries Exploration, Ministry of Agriculture and Rural Affairs, Shanghai Ocean University, Shanghai 201306, China;National Engineering Research Center for Oceanic Fisheries, Shanghai Ocean University, Shanghai 201306, China;Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Ministry of Education, Shanghai Ocean University, Shanghai 201306, China;Scientific Observing and Experimental Station of Oceanic Fishery Resources, Ministry of Agriculture and Rural Affairs, Shanghai Ocean University, Shanghai 201306, China
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Abstract:

Ommastrephes bartramii is one of the important and significant economic species in the Northwest Pacific Ocean, and the variation in biomass is susceptible to the climate change, such as El Ni?o. In this study, we assumed that the oceanic Ni?o index (ONI) affected the parameters, including intrinsic rate of growth (r), carrying capacity (K), respectively and simultaneously, of population dynamics model for O. bartramii. Thus, four surplus production models, Schaefer’s model of surplus production (SP) and three environmentally dependent surplus production (EDSP) models (E_r-EDSP, E_K-EDSP and E_r-E_K-EDSP) were developed to evaluate the trend of the stock dynamics of O. bartramii in the Northwest Pacific. The results showed that the Deviance Information Criterion (DIC) values of three EDSP models were less than the DIC value of SP model. Moreover, the E_r-E_K-EDSP with the smallest DIC value served as the optimal model. The estimated Maximum Sustainable Yield (MSY) value was 39.26×10⁴ tons. From 1994 to 2017, the fishing mortality rate (F_t) of O. bartramii was far lower than the target mortality rate (F_tar) and the fishing mortality rate at the level of MSY (F_MSY). In 2017, the stock resources of O. bartramii in the Northwest Pacific Ocean were less than the corresponding resources at the level of MSY (B_MSY). Currently, the O. bartramii stock in the Northwest Pacific is being overfished or was being overfished. The conclusion could be used for sustainable development and management of O. bartramii in the Northwest Pacific Ocean.

Key words:Ommastrephes bartramii;El Ni?o;population dynamic;surplus production model;Northwest Pacific Ocean

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SUI Xin, WANG Jintao, CHEN Xinjun, LEI Lin. Impacts of the El Ni?o event on the population dynamics of Ommastrephes bartramii in the Northwest Pacific Ocean[J]. Journal of Fisheries of China,2022,46(8):1345~1356

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Received:December 05,2020
Revised:January 27,2021
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Online: August 16,2022
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