Spatial mapping of fisheries in the coastal space of Chilean Patagonia protected areas
Annex A: Spatial mapping of fisheries in the coastal space of Chilean Patagonia protected areas. Supplementary text with methodological details for the study "Habitat risk assessment to multiple threats in marine protected areas of Chilean Patagonia” funded by Fondecyt project 11201053. This document includes the supplementary text with the methods to obtain and classify the fishery information in Chilean Patagonia using the data provided by the Chilean Servicio Nacional de Pesca (SERNAPESCA). RASTER_DATA_SET: Files in raster format, classified into three categories of fish effort intensity (low, medium and high) separated into three folders, each by protected area namely: Magdalena_Island_NP, Guaitecas_NR, and Kawesqar_NR. Raster files inside folders were named as: fl_aqua_rc_: Raster file of Aquaculture Fleet representing fishing effort intensity (low, medium, and high) fl_art_rc:_ Raster file of Artisanal Fleet representing fishing effort intensity (low, medium, and high). fl_ind_rc_: Raster file of Industrial Fleet representing fishing effort intensity (low, medium, and high). fl_tran_rc_: Raster file of Conveyor Fleet representing fishing effort intensity (low, medium, and high).
Steps to reproduce
Supplementary text To develop a map of fisheries we downloaded, processed, and classified geospatial information into raster format that represents the hours of fishing effort per pixel for fisheries, which we classified into: aquaculture fleet, industrial fishing fleet, artisanal fishing fleet, and transport fleet. The characterization of the 4 types of fleet for the study area was obtained using the Vessel Monitoring System (VMS), which refers to the set of devices and systems that transmit basic information on the location of a vessel (time, latitude, longitude, course, speed) at established intervals (Global Fishing Watch). The sum of hours (calculated time spent within a grid cell) can be interpreted as representative of fishing effort for each of the four fleet types. These totals were reclassified into high and medium-low using the quartiles of the data distribution in ArcGIS. The fisheries map was overlapped in GIS ArcMap 10.3 with the coastal protected areas of Magdalena Island National Park (NP), Guaitecas National Reserve (NR), and Kawésqar NR to assess their extent in km2. Details of the method of obtaining, classifying, and mapping the layers can be found in the document ANNEX_A.pdf attached.