Relationship of Oceanic Vorticity to Catches of Chilean Jack Mackerel (Trachurus Murphyi) in The Peruvian Sea Between 2011 and 2021
Abstract:
The cost of surveying for fishing grounds is usually high, so it is necessary to generate predictive analyses that allow to increase the efficiency of fishing vessels which in turn can monitor the vorticity in the ocean, and the aggregation of nutrients, plankton and fish. The acoustic information collected aboard fishing vessels is valuable data that can be used to model the distribution of important species such as Chilean jack mackerel. We studied the relationship between ocean vorticity and meso and sub-mesoscale structures with the availability of jack mack erel (Trachurus murphy) and other species between 2011 and 2021. Therefore, we used satellite data on sea level anomaly and acoustic data collected during scientific surveys to detect the upper limit of the minimum oxygen zone to identify sub-mesoscale structures by using wavelet analysis. Our results shown that catches were invariably and positively correlated with the location of the fronts between the cyclonic (divergent) and anticyclonic (convergent) eddies, which can support habitat modeling of adult Chilean Jack mackerel in Peru.
