Variabilidad interanual de los desembarques en la pesquería del Stock Norte-Centro de la anchoveta peruana (Engraulis ringens) entre las temporadas de pesca del año 2000 al 2018

• Autor: Vilela Ríos, Fiorella Isabel
• Formato: tesis de grado
• Fecha de Publicación: 2020
• Institución: Universidad Peruana Cayetano Heredia
• Repositorio: UPCH-Institucional
• Lenguaje: español
• OAI Identifier: oai:repositorio.upch.edu.pe:20.500.12866/9009
• Enlace del recurso: https://hdl.handle.net/20.500.12866/9009
• Nivel de acceso: acceso abierto
• Materia: Variabilidad de los Desembarques; Anchoveta Peruana (Engraulis ringens); Condiciones Ambientales; Manejo de la Pesquería; http://purl.org/pe-repo/ocde/ford#1.06.12; http://purl.org/pe-repo/ocde/ford#4.01.03

The Peruvian anchovy (Engraulis ringens) fishery has exhibited large fluctuations that are mainly associated with the high climatic variability that occurs in the Humboldt Current System and the occurrence of ENSO events. Likewise, the fishery management have had strong implications in these fluctuations. Currently, daily landings within each fishing season are used as an indicator for the management of this fishery. However, there is not studies about the variability and behavior of the landings during the different environmental and management scenarios present in the fishing seasons. The goal of this study was to analyze the interannual variability of landings in the fishing seasons of the North-central stock of anchovy. For this purpose, first, were calculated the coefficient of variation (CV) and the slope (b) (which indicates a trend in the behavior of landings) of the landings of 36 fishing seasons from 2000 to 2018. Moreover were identified factors that could be impacting this variability, these factors were related to environmental conditions (the size of the anchovy's habitat and the occurrence of ENSO events), fishery management (fishing quota and number of trips), the performance of the fleet (Effort and CPUE), and the economic value of the resource (Price of fishmeal). These variables were related to CV and slope (b) by combining two multivariate techniques (PCA and Hierarchical Cluster). The different groups obtained showed that in warm (El Niño) or cold (La Niña) conditions, as well as in a period of overcapitalization of the fleet, the variability of landings was low. On the contrary, in neutral environmental conditions, where fishing developed normally, the variability of landings was very high. For instance, the variables that mainly control the variability of the landings are associated with the management of the fishery (size of the fleet) and with environmental variability (occurrence of ENSO events).