A method for predicting the quantity of squid resources in the north pacific ocean based on the pacific oscillation index

Abstract

The invention discloses a method for predicting the quantity of squid resources in the north pacific ocean based on the pacific oscillation index. The method comprises the following steps: obtaining the monthly Pacific oscillation index PDO value of the North Pacific Ocean where the squid is distributed in the North Pacific Ocean in the previous N years; The correlation between squid abundance ln(CPUE) and monthly PDO values in the first N years in the North Pacific Ocean was analyzed by using time series analysis method. The monthly PDO values were obtained as climatic factors affecting theabundance of squid resources in the North Pacific Ocean. Multivariate linear equation was used to establish several abundance prediction models of squid resources in the North Pacific Ocean and to calculate the statistical P value.in the above-mentioned North Pacific resource abundance prediction models, the model with the smallest statistically P value is selected as the optimal model.

Description

technical field [0001] The invention relates to the technical field of forecasting squid resources in the North Pacific Ocean, in particular to a forecasting method for squid resources in the North Pacific Ocean based on the Pacific Oscillation Index. Background technique [0002] North Pacific squid (also known as squid) is an important economic cephalopod resource in the world. Its large-scale development began in the 1970s, and the highest output in history has exceeded 500,000 tons. and the main target of squid fishing in the region. Squid is distributed in the North Pacific Ocean and is affected by the warm Kuroshio Current and the cold Red Current. The confluence of currents affects the resources and fishing grounds of Squid. [0003] Existing studies have shown that since the North Pacific squid is an annual species, its resource replenishment is affected by the environment of the spawning grounds. Yuan Hongchun et al. (2013) used correlation analysis to screen out t...

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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 North Pacific 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 in advance volume is blank

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