Un acontecimiento social: deporte y educación física en Las Palmas de Gran Canaria (1844-1914)

Programa de Doctorado: Evaluación y asesoramiento en el desarrollo de la calidad educativa

El programa de formación orientado a la investigación : una propuesta alternativa para el Practicum de Educación Social en la ULPGC

Programa de Doctorado: Evaluación y asesoramiento en el desarrollo de la calidad educativa

Aportaciones al sistema de autocontrol en microestablecimientos alimentarios de restauración colectiva

Programa de Doctorado: Higiene y Tecnología de los Alimentos

Reconstruction of spatiotemporal capture data by means of orthogonal functions: the case of skipjack tuna (Katsuwonus pelamis) in the central-east Atlantic

[EN] The information provided by the International Commission for the Conservation of Atlantic Tunas (ICCAT) on captures of skipjack tuna (Katsuwonus pelamis) in the central-east Atlantic has a number of limitations, such as gaps in the statistics for certain fleets and the level of spatiotemporal detail at which catches are reported. As a result, the quality of these data and their effectiveness for providing management advice is limited. In order to reconstruct missing spatiotemporal data of catches, the present study uses Data INterpolating Empirical Orthogonal Functions (DINEOF), a technique for missing data reconstruction, applied here for the first time to fisheries data. DINEOF is based on an Empirical Orthogonal Functions decomposition performed with a Lanczos method. DINEOF was tested with different amounts of missing data, intentionally removing values from 3.4% to 95.2% of data loss, and then compared with the same data set with no missing data. These validation analyses show that DINEOF is a reliable methodological approach of data reconstruction for the purposes of fishery management advice, even when the amount of missing data is very high.

Optimismo a pesar de todo. Historias actuales de conductas optimistas ante la vida

Documentación gráfica: Rafael Santana Hernández. Maquetación: María del Carmen Martín Marichal. Diseño de la cubierta: Miguel A. Ramos Martín