Fishing Ground Distribution of Neon Flying Squid (Ommastrephes bartramii) in Relation to Oceanographic Conditions in the Northwest Pacific Ocean

YU Wei; CHEN Xinjun; YI Qian

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Fishing Ground Distribution of Neon Flying Squid (Ommastrephes bartramii) in Relation to Oceanographic Conditions in the Northwest Pacific Ocean

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Neon flying squid, Ommastrephes bartramii, is a squid species of the North Pacific Ocean, which plays an important economical role in the international fishery. Logbook data for Chinese squid-jigging fishery over 2004–2011 were used to evaluate the relationship between the fishing grounds of the squid and the convergent frontal areas, which were defined by the contour lines of specific sea surface temperature(SST) and chlorophyll-a(Chl-a) concentration. Our results indicate that the SST in the range of 15 to 19℃ and the Chl-a concentration in the range of 0.1 to 0.4 mg m^(-3) are the favorable conditions for the aggregation of the squid. Additionally, we deduced that the SST at 17.5℃ and the Chl-a concentration at 0.25 mg m^(-3) are the optimal environmental conditions for the aggregation of O. bartramii. In August, the annual CPUE is positively correlated with the proportion of the fishing grounds with favorable SST and Chl-a concentration, as well as the combination of the two variables, implying that the abundance of the squid annually is largely depending on the presence of the favorable environmental conditions for fishery in August. Minor spatial difference between mean latitudinal location of the 17.5℃ SST and 0.25 mg m^(-3) Chl-a fronts can increase the CPUEs of O. bartramii. Furthermore, the monthly latitudinal gravity centers of the CPUE closely followed the mean latitudinal position of the contour lines of the 17.5℃ SST and the 0.25 mg m^(-3) Chl-a concentration. Our findings suggest the convergent oceanographic features(fronts) play significant roles in regulating the distribution and abundance of the western stock of the winter-spring cohort of O. bartramii, which can help people to improve their ability to discover the O. bartramii fishing grounds with higher productivity.

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《中国海洋大学学报：英文版》 |2017年第6期|1157-1166|共10页
作者
YU Wei; CHEN Xinjun; YI Qian;
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作者单位

College of Marine Sciences;

Shanghai Ocean University;

Shanghai 201306;

P. R. China;

National Engineering Research Center for Oceanic Fisheries;

Shanghai Ocean University;

Shanghai 201306;

P. R. China;

Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources;

Ministry of Education;

Shanghai Ocean University;

Shanghai 201306;

P. R. China;

Collaborative Innovation Center for Distant-water Fisheries;

Shanghai Ocean University;

Shanghai 201306;

P. R. China;

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原文格式 PDF
正文语种 chi
中图分类海洋学;
关键词
neon; flying; squid; sea; surface; temperature; chlorophyll-a; oceanic; fronts; fishing; ground; the; Northwest; Pacific; Ocean;

Fishing Ground Distribution of Neon Flying Squid (Ommastrephes bartramii) in Relation to Oceanographic Conditions in the Northwest Pacific Ocean

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