Skip to main content

IMIS

A new integrated search interface will become available in the next phase of marineinfo.org.
For the time being, please use IMIS to search available data

 

[ report an error in this record ]basket (0): add | show Print this page

Reconstruction of spatiotemporal capture data by means of orthogonal functions: the case of skipjack tuna (Katsuwonus pelamis) in the central-east Atlantic
Ganzedo, U.; Erdaide, O.; Trujillo-Santana, A.; Alvera-Azcárate, A.; Castro, J.J. (2013). Reconstruction of spatiotemporal capture data by means of orthogonal functions: the case of skipjack tuna (Katsuwonus pelamis) in the central-east Atlantic. Sci. Mar. (Barc.) 77(4): 575-584. dx.doi.org/10.3989/scimar.03881.07A
In: Scientia Marina (Barcelona). Consejo Superior de Investigaciones Científicas. Institut de Ciènces del Mar: Barcelona. ISSN 0214-8358; e-ISSN 1886-8134, more
Peer reviewed article  

Available in  Authors 

Keyword
    Marine/Coastal
Author keywords
    catches; missing data; spatiotemporal data reconstruction; singularvalue decomposition; DINEOF

Authors  Top 
  • Ganzedo, U.
  • Erdaide, O.
  • Trujillo-Santana, A.
  • Alvera-Azcárate, A., more
  • Castro, J.J.

Abstract
    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 fish¬ery management advice, even when the amount of missing data is very high.

All data in the Integrated Marine Information System (IMIS) is subject to the VLIZ privacy policy Top | Authors