Environmental Factors-based Forecasting Method for Cephalopod Fishing Grounds in Sea Area in North West Africa

摘要

#$%^&*AU2020100306A420200402.pdf#####Abstract The present invention relates to a cephalopod fishery forecasting method, and belongs to the field of pelagic fishery. A cephalopod fishery forecasting method in northwest African waters based on environmental factors, including the following steps: step 1: acquiring catch production statistical data from cephalopod fisheries in northwest African waters of many years; step 2: acquiring marine environmental data corresponding to the catch production statistical data, the marine environmental data including sea surface temperature (SST) and sea surface height anomaly (SSHA); step 3: studying the relationship between the operating haul, the operating output ratio and the average output per haul in each interval as indexes of a central fishery and the marine environmental data of step 2; and step 4: establishing suitability indexes (SI) of different environmental factors, and calculating habitat suitability indexes (HSI) under different weight cases by using an expert assignment method, thus obtaining distribution waters of the central fishery of cephalopod fisheries in northwest African waters for forecasting the central fishery.Drawings Acquire catch production statistical data from northwest African fisheries of many years, the catch production statistical data including operating time, sea depth, operating haul and total catch output Acquire marine environmental data corresponding to the catch production statistical data, the marine environmental data including sea surface temperature (SST) and sea surface height anomaly (SSHA) Study the relationship between the operating haul ratio, output ratio and average output per haul in each interval as indexes of a central fishery and the marine environmental data of step 2 Establish suitability indexes (SI) of different environmental factors, and calculate habitat suitability indexes (HSI) under different weight cases by using an expert assignment method, thus obtaining a distribution waters of the central fishery of northwest African cephalopod fisheries, and obtaining an optimal weight case in the distribution waters for forecasting the central fishery FIG. 1