Bibliographic citations
Ccasani, M., (2023). Variación de la CPUE de pota (Dosidicus gigas) en la costa norte-centro peruana y su relación con la Corriente Cromwell [Universidad Nacional Agraria La Molina]. https://hdl.handle.net/20.500.12996/6012
Ccasani, M., Variación de la CPUE de pota (Dosidicus gigas) en la costa norte-centro peruana y su relación con la Corriente Cromwell []. PE: Universidad Nacional Agraria La Molina; 2023. https://hdl.handle.net/20.500.12996/6012
@misc{renati/1116996,
title = "Variación de la CPUE de pota (Dosidicus gigas) en la costa norte-centro peruana y su relación con la Corriente Cromwell",
author = "Ccasani De la Cruz, Michael Felix",
publisher = "Universidad Nacional Agraria La Molina",
year = "2023"
}
For this research, a statistical analysis will be carried out between the relative abundance (CPUE) of the species Dosidicus gigas, known as squid in Peru, which is mainly captured in the north-central zone of Peru (3°S-11° S) and the oceanographic parameters that characterize the Cromwell Current or Equatorial Undercurrent (EUC). These are: zonal current velocity (cm/s), subsurface temperature (°C), salinity (UPS), dynamic height (cm) and depth of 20°C isotherm (m) in the NOAA 0°N buoys. , 170°W, 0°N, 140°W and 0°N, 110°W. A total of 32,116 artisanal fishing records derived from IMARPE information will be processed during the period January 2015-June 2018. The methodology applied was the cross-correlation between the average CPUE and the monthly oceanographic parameters. The results showed that the zonal velocity, subsurface temperature, salinity, dynamic height and 20°C isotherm at 110°W presented highly significant correlations (p-value<0.01) with lags of 0, +1 and +2 with the CPUE. unlike 170°W and 140°W where a significant correlation (p-value<0.05) or no significance was observed. With these results we identified 3 periods: “strong EUC” from January 2015 to January 2016, “weak EUC” February 2016 to December 2017 and “normal EUC” throughout 2018. During the strong EUC the average CPUE was 11.71 t/trip, Weak EUC, the average CPUE was 4.87 t/trip and 5.37 t/trip, and for normal EUC the average CPUE was 7.34 t/trip. Finally, it is concluded that the oceanographic parameters of the EUC at 110°W have a highly significant direct relationship with the CPUE of squid in the north-central zone of Peru, depending on the intensity and duration of the variable, that is, increases in the CPUE they are related to periods where the zonal velocity intensifies, subsurface temperature increases, the 20°C isotherm deepens and the dynamic height increases; On the contrary, when the CPUE decreases, it is related to periods where the zonal velocity weakens, the subsurface temperature decreases, the 20°C isotherm becomes superficial and the dynamic height decreases at 110°W. These results allow us to know how the CPUE of squid is related to the oceanographic parameters of the Cromwell Current. This relationship expands the knowledge we have about the abundance of the resource, allowing for a better analysis of the distribution and abundance based on the ocean currents.
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