Method for predicting access fishing of western and central pacific ocean katsuwonuspelamis purse seine fishery

Abstract

The invention relates to a method for predicting access fishing of the western and central pacific ocean katsuwonuspelamis purse seine fishery. The method adopts statistic data of each year before a prediction year to first 16 years, which comprises a year, a month, a longitude, a latitude, a fishing effort (shooting times) and a fish catch (ton) in a region from 15 degrees south to 15 degrees north and from 125 degrees east to 180 degrees east, SSTA (Sea Surface Temperature Anomaly) in a Nino3.4 region and an SST (Sea Surface Temperature) in operation waters. The method is characterized in that a 5 degrees * 5 degrees spatial resolution region is used as one sea area, production statistic data of the sea areas in 16 years are matched with corresponding environment data one by one to obtain a relationship of different SSTA and SST ranges and corresponding initialized fishing efforts in each sea area, and an access fishing prediction model of each sea area is established by utilizing a normal distribution model; the basis is provided for scientific access fishing of the western and central pacific ocean katsuwonuspelamis purse seine fishery; blindness of fishing is greatly reduced; and fishing efficiency is improved.

Description

technical field [0001] The invention relates to a method for predicting the entry of skipjack seine fishery in the central and western Pacific Ocean. Background technique [0002] Skipjack (Katsuwonuspelamis) occupies an extremely important position in the tuna fishery in the world, and the central and western Pacific Ocean is an important operating sea area. In recent years, the average annual output of skipjack in the Western and Central Pacific has exceeded 1.5 million tons, accounting for 60% of the world's skipjack output. Studies have shown that El Niño / La Niña events are closely related to the distribution of skipjack resource fishing grounds in the central and western Pacific, and changes in climate and marine environment will lead to changes in the spatial distribution of skipjack resources. There are 12 countries and regions in the Western and Central Pacific, only a small part of which is in the high seas, and skipjack is distributed in the jurisdictional waters ...

AI Technical Summary

Problems solved by technology

However, due to the annual and seasonal changes of the skipjack fishery and the increase in the cost of entering the South Pacific island countries, the development of the tuna seine fishery in China is facing some serious problems: (1) The medium and long-term tuna resources and spatial distribution cannot be predicted, resulting in The blindness in the purchase of fishing countries and catch quotas has increased, which has affected the overall benefits of the tuna seine fishery; (2) South Pacific island countries have imposed restrictions on the number of operating days, and the management has become increasingly strict, and the cost of fishing has also continued to increase, resulting in operational efficiency and low economic efficiency

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