A method for forecasting the replenishment of squid resources in the Northwest Pacific Ocean
A technology of resource replenishment and prediction method, which is applied in the field of soft fish resource replenishment prediction, can solve the problem that remote sensing cannot directly obtain fishery information in fishing grounds, etc.
Active Publication Date: 2014-10-22
SHANGHAI OCEAN UNIV +1
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Problems solved by technology
[0006] However, there are disadvantages in using remote sensing technology to obtain information in the ocean. Marine fish live below the surface of the ocean, and remote sensing cannot directly obtain information on fish stocks in fishing grounds.
Only through the research and analysis of the environmental information of the fishing ground and ocean water body
Method used
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Embodiment Construction
[0020] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.
[0021] Northwest Pacific squid is an annual species with a short life cycle, usually there is no remaining population and only supplementary populations, and the replenishment in the next year mainly depends on the marine environmental conditions of the spawning grounds. The survival rate of eggs is high under suitable marine environmental conditions, otherwise it is low. The spawning time of squid is usually from January to April, the surface temperature suitable for spawning is 21-25°C, and the spawning sea area is 130°-170°E, 20°-30°N.
[0022] A method for forecasting the replenishment of squid resources in the Northwest Pacific Ocean is characterized in that it comprises the following steps:
[0023] (1) Obtain the sea surface temperature ...
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The invention relates to a method for forecasting northwest Pacific Ocean squids resource stock recruitment. The method comprises the following steps of: 1, calculating the sea surface temperature data; 2, counting sea areas of which the sea surface temperature is 21-25 DEG C in the seas in the range of 130 DEG-170 DEG E and 20 DEG to 30 DEG N from January to April; 3, converting the sea surface temperature in the 130 DEG-170 DEG E and 20 DEG to 30 DEG N into a surface temperature contour map, and calculating the proportion of the seas of which the surface temperature is 21-25 DEG C (February AREASST, and the unit is %); 4, obtaining a formula of calculating squids resource abundance (CPUE, and the unit is t / d) on history; and 5, calculating the squids resource abundance CPUE=0.134449*AREASST-8.7821 in next year. The method has the advantages of: by the relational expression, more than 60% of the squids resource abundance change can be explained. The forecasting result of the northwest Pacific Ocean squids resource stock recruitment is provided for users and related departments in time and is taken as a scientific reference for fishery production and arranging; and the method can be released as a product in real time in future.
Description
technical field [0001] The invention relates to a method for forecasting fishing conditions, in particular to a method for predicting the replenishment of squid resources in the Northwest Pacific Ocean, especially in sea areas where 130°-170°E and 20°-30°N are spawning grounds. Background technique [0002] Fishery forecast is a key link in fishery production. Forecasting the replenishment of squid resources in the Northwest Pacific is beneficial to the forecast of squid production, central fishing ground location and fish season. The survival rate of squid larvae is not only related to its internal physiological factors, but also closely related to external marine environmental factors. There are many external factors that directly or indirectly affect the actions of juvenile fish, including hydrology (ocean currents, water temperature, tides, salinity, water color, water quality, and runoff, etc.), meteorology (including wind, air pressure, temperature, precipitation, etc....
Claims
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IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 陈新军杨铭霞陆化杰刘必林王从军余为李建华方舟易倩李伟文
Owner SHANGHAI OCEAN UNIV