Abstract: The spatial-temporal distribution of population aggregation centre of Chilean jack mackerel Trachurusmurphyi and relation to environmental factors were investigated in Southeast Pacific based on the fishing data collected from Chinese large trawling fleets from April to August from 2011 to 2018 via sea surface temperature(SST), sea surface salinity(SSS), chlorophyll concentration(Chl-a)and sea surface temperature anomaly(SSTA)to evaluate spatial and temporal analysis and stock abundance prediction of Chilean jack mackerel in fishing ground in Southeast Pacific by hierarchical cluster analysis and neural network.The temporal and spatial changes in the center of gravity and the relationship with the marine environment of target species were analyzed in this study.It was found that the monthly fixed cluster centrality was determined based on the average value of the cluster centrality in the same month from 2011 to 2017, and tended to move from the southwest to the northeast as the month passed.The aggregation centrality was shown to be a trend to move to the northwest as the SSTA index was elevated, and to be a trend to move to the southeast as the SSTA index was declined.The aggregation centrality from April to August 2018 was predicted by the BP neural network model, and the output verification results showed that the actual output percent in the total output of the total fishery within the aggregation centrality accounted for 82% in April and 79% in May, decreased to accounting for 60% in July and 56% in August, and 48% in September.The finding indicated that the center of gravity of the Chilean jack mackerel aggregation was moving from the southwest to the northeast, with significant negative correlation between the aggregation center of gravity in longitude without significant positive correlation in latitude by the SSTA.
丁鹏, 邹晓荣, 白思琦, 张鹏. 东南太平洋智利竹筴鱼渔场时空分析与资源丰度的预测[J]. 大连海洋大学学报, 2021, 36(4): 629-636.
DING Peng, ZOU Xiaorong, BAI Siqi, ZHANG Peng. Spatial and temporal analysis and stock abundance prediction of Chilean jack mackerel Trachurus murphyi in fishing ground in Southeast Pacific. Journal of Dalian Ocean University, 2021, 36(4): 629-636.
2021, Vol. 36 
