Bibliographic citations
Aroni, E., (2018). Estimación de la captura ilegal de Dosidicus gigas por la flota que opera fuera de la ZEE del Perú (2013-2016) [Tesis, Universidad Nacional Agraria La Molina]. https://hdl.handle.net/20.500.12996/3863
Aroni, E., Estimación de la captura ilegal de Dosidicus gigas por la flota que opera fuera de la ZEE del Perú (2013-2016) [Tesis]. : Universidad Nacional Agraria La Molina; 2018. https://hdl.handle.net/20.500.12996/3863
@misc{renati/242968,
title = "Estimación de la captura ilegal de Dosidicus gigas por la flota que opera fuera de la ZEE del Perú (2013-2016)",
author = "Aroni Sulca, Eloy",
publisher = "Universidad Nacional Agraria La Molina",
year = "2018"
}
The present study estimates the illegal catch of Dosidicus gigas by industrial fishing fleet that operated outside the Peruvian EEZ using three databases. First, daily imagery provided by The Suomi National Polar-orbiting Partnership (NPP) satellite and used to detect fishing boats using powerful lamps of up 300 kW to attract the squid to the surface. Second, navigation track information of fishing boats obtained from Automatic Identification System (AIS). Third, registry of the vessels authorized to operate in the South Pacific Regional Fisheries Management Organisation (SPRFMO) area and the catch data for capture of Jumbo flying squid in the South East Pacific (FAO-87). The analysis was performed for the period between 2013 and 2016 and consisted in the quantification of the number of vessels detected with satellite images and validation with AIS information showing robust results including a root-mean-square error (RMSE) of 1.98 ships and a BIAS in the estimate of -0.43 ships. The number of light points of fishing vessels was compared with the tracks of fishing vessels estimated from the AIS analyses. For this, a speed threshold value of fewer than 2.3 knots was estimated, which is consistent with a night fishing operation with lights. Then, it was compared with the list of authorized vessels in the SPRFMO registry to quantify the number of illegal vessels and using a new monthly CPUE value, the illegal catch was calculated. The estimations indicated that the illegal catch represented 39.4% (2013), 30.7% (2014), 20.0% (2015) and 18.4% (2016) and for the entire study period (2013-2016) 27.2% of the total catch officially registered in the SPRFMO. These results demonstrate that unauthorized and unidentified vessels operate outside the EEZ of Peru and Chile and can be detected using nighttime satellite images and AIS information. This new procedure makes it possible to estimate the real size of the fleet as well as reconstruct total catches and estimate the real magnitude of IUU fishing in fisheries where lights are used to attract catch
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