Page 84 - 《水产学报》2026年第3期

3 期 水 产 学 报 50 卷

Assessment of Ommastrephes bartramii in the Northwest
Pacific based on recent data

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TANG Xin , WANG Jintao 1,2,3,4,5* , CHEN Xinjun 1,2,3,4,5
(1. College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China;
2. Key Laboratory of Oceanic Fisheries Exploration, Ministry of Agriculture and Rural Affairs,
Shanghai Ocean University, Shanghai 201306, China;
3. National Engineering Research Center for Oceanic Fisheries, Shanghai Ocean University, Shanghai 201306, China;
4. Key Laboratory of Sustainable Exploration of Oceanic Fisheries Resources, Ministry of Education,
Shanghai Ocean University, Shanghai 201306, China;
5. Scientific Observing and Experimental Station of Oceanic Fishery Resources, Ministry of Agriculture and Rural Affairs,
Shanghai Ocean University, Shanghai 201306, China)

Abstract: Ommastrephes bartramii is a kind of organism with important economic and ecological value. It can be divided into
two breeding groups: winter and spring group (January to May) and autumn group (September to February). Among them,
winter and spring population is an important commercial fishing object in Northwest Pacific. The Chinese mainland has been
fishing for O. bartramii in the Northwest Pacific since 1993. Subsequently, the fishing area and scale were expanded. In recent
years, the annual production of the O. bartramii has been declining, yet it still accounts for over 90% of the total production. As
an important prey for large fish and marine mammals in the Marine food web, O. bartramii plays a connecting role in the
middle level of the marine nutrient level pyramid, so the change in the number of O. bartramii has a direct or indirect impact on
the change in the number of marine organisms at all levels, that is, on the entire marine ecosystem. The Just Another Bayesian
biomass assessment (JABBA) model requires catch and catch per unit effort (CPUE) data. The model can also fit multiple
CPUE time series, estimate the process variance of the model, estimate the observed variance of single or group CPUE time
series, and determine the fish production function by setting B MSY /K and its shape parameter m, so it has been widely used.
Based on the catch data and CPUE data, the JABBA model was used to evaluate the status of the fish resources in the Northw-
est Pacific, and the latest relevant data of the fish resources in the Northwest Pacific were used to provide more accurate inform-
ation and scientific basis for the management of the fish resources. Schaefer model of m=2 was used in this study to evaluate
the Northwest Pacific O. bartramii. Moreover, it is assumed that the prior distributions of model parameters obey uniform dis-
tribution, and the catchable coefficient q is set to obey uniform prior distribution without information, which is defined as uni-
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form distribution (1×10 , 3×10 ). For environmental tolerance K, generally, its range can be determined according to the mul-
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tiple of the maximum historical catch of the population, which is defined as uniform distribution (10, 100) (unit 10 t), a priori of
intrinsic growth rate r. Based on the "high" resource resilience for O. bartramii listed on the FishBase website, the range of
intrinsic growth rate can be set as uniform distribution (0.6, 1.5). The results show that the environmental tolerance K= 598 100
t, the intrinsic growth rate r is 1.1, and the estimated maximum sustainable yield (MSY) is 158 300 t. The prior and posterior
distributions of each parameter converge well. According to the fishing data from 1995 to 2020 in the Northwest Pacific, it is
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found that the annual catch of O. bartramii ranged from 1×10 to 4×10 t, with the highest catch value in 1999 and the lowest
catch value in 2020, and there was a big difference between the highest and the lowest. However, according to the results of the
JABBA model, the resources of O. bartramii in the Northwest Pacific have not been overfished, and the resources are in good
condition.
Key words: Ommastrephes bartramii; surplus production model; resource assessment; Northwest Pacific
Corresponding author: WANG Jintao. E-mail: jtwang@shou.edu.cn

Funding projects: National Key R & D Program of China (2023YFD2401302); National Natural Science Foundation of China
(41876141)

https://www.china-fishery.cn 中国水产学会主办 sponsored by China Society of Fisheries
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