Prediction of squid resource abundance of Akihito swarm in Japan based on Pacific Ocean oscillation index

Abstract

The invention discloses a method for predicting the abundance of squid resources of Japanese Qiusheng school based on Pacific oscillation index. The method comprises the following steps: obtaining themonthly Pacific oscillation index PDO value of the sea area of Japan Sea distributed by Japanese Qiusheng school squid in the previous N years; The correlation between the abundance of squid resourceCPUE and the monthly PDO value in the first N years was analyzed by using the time series analysis method. The monthly PDO value of P < 0.05 was obtained. The monthly PDO value was regarded as the climatic factor affecting the abundance of squid resource in the Japanese Qiusheng colony, and the results showed that the abundance of squid resource CPUE in the Japanese Qiusheng colony was significantly correlated with the monthly PDO value. Multivariate linear equation was used to establish the abundance prediction model of squid resources in several Japanese autumn-born groups and to calculatethe P value statistically. Among the above models, the model with the smallest P value is selected as the optimal model.

Description

technical field [0001] The invention relates to the technical field of forecasting the abundance of squid resources, in particular to a method for forecasting the abundance of squid resources in the Japanese autumn group based on the Pacific Oscillation Index. Background technique [0002] Todarodes pacificus (also known as Japanese squid) is an economically important cephalopod resource in the world, and it is only distributed in the Northwest Pacific Ocean and the Gulf of Alaska in the Eastern Pacific Ocean. It is mainly distributed in the 21°-50°N waters of the western Pacific Ocean, namely the Sea of ​​Japan, the Pacific coast of Japan, and the Yellow Sea and East my country Sea in China. It is an oceanic shallow marine species in the warm temperate zone, inhabits the surface layer to 500m water layer, and has a wide temperature range. According to the spawning season, growth type and migration path of Pacific pleura, it can be divided into three populations: winter gro...

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Problems solved by technology

The above research shows that scholars at home and abroad have conducted good research on the impact of the Japanese Akizuki squid spawning ground environment on its resource replenishment, and established a corresponding resource forecast model, but how to use climatic factors to predict its resource amount is blank

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