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2 期 陈俊霖，等：西北印度洋公海渔场鸢乌贼的时空分布变化规律 50 卷

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The temporal and spatial distribution characteristics of

Symlectoteuthis oualaniensis in high seas fishing ground of
northwest Indian Ocean

2
1,2
2,3
2
CHEN Junlin , ZHAO Guoqing , ZHANG Shengmao , CUI Xuesen ,
2*
4
TANG Fenghua , CHEN Feng , HAN Haibin 2,3
(1. School of Navigation and Naval Architecture, Dalian Ocean University, Dalian 116023, China;
2. Key Laboratory of East China Sea Fisheries Resources Development and Utilization,
Ministry of Agriculture and Rural Affairs, East China Sea Fisheries Research Institute,
Chinese Academy of Fishery Science, Shanghai 200090, China;
3. College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China;
4. Zhejiang Marine Fisheries Research Institute, Zhoushan 316021, China)

Abstract: Symlectoteuthis oualaniensis is a cephalopod with strong warm water properties in the ocean, with abundant resource
reserves that can provide abundant protein for humans. Especially in the high seas of the northwest Indian Ocean, due to the
high salinity and water temperature of the Gulf of Aden, as well as unique ocean current conditions, it has formed a highly pro-
ductive S. oualaniensis fishing ground and become one of the key distant-water fishing grounds of China. From 2016 to 2019,
both the production and nominal CPUE (nominal catch per unit effort) increased with the increase of fishing vessels. However,
in recent years, China has continuously increased the number of fishing vessels in the northwest Indian Ocean. In 2020, the
nominal CPUE has significantly decreased, and in 2021, the decrease in fishing vessel numbers led to an increase in nominal
CPUE. Based on the above situation, To understand grasp the spatial and temporal distribution characteristics of the S. oualani-
ensis fishery in the high seas of the northwest Indian Ocean, especially the changes of the fishery in the high-yield center, this
study lays a foundation for the later activities such as fishery forecasting and catch prediction. Based on the statistical data of

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