Environmental variability in the North Atlantic and Iberian waters and its influence on pelagic fish: the cases of horse mackerel and albacore ...

• Main Authors: Lavín, A., Moreno-Ventas, X., De Zárate, V. Ortiz, Abaunza, P., Cabanas, J. M.
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: ASC 2002 - O - Theme session 2024
• Subjects: Fisheries and aquaculture; Pressures, impacts, conservation, and management; North Atlantic; North Atlantic oscillation
• Online Access: https://dx.doi.org/10.17895/ices.pub.25443262; https://ices-library.figshare.com/articles/conference_contribution/Environmental_variability_in_the_North_Atlantic_and_Iberian_waters_and_its_influence_on_pelagic_fish_the_cases_of_horse_mackerel_and_albacore/25443262

No abstracts are to be cited without prior reference to the author.Time series of environmental variables that characterizes the atmospheric and oceanic variability, such as the North Atlantic Oscillation (NAO) index, the oceanic transport given by differences in Potential Energy anomaly (PEA), the position of the Gulf Stream index (GSI) and local variables as air and sea surface temperature, precipitation, wind, mean sea level and Ekman transport in the western and northern Iberia have been analysed. The system dynamics was characterized using a factorial Principal Component Analysis (PCA) of all variables. PCA of the abiotic parameters from 1966 to 2000 shows the first component as a thermal axis, setting up air and sea surface temperatures (positive semi-axis) against intensity of spring/summer upwelling (negative semi-axis), explaining around 19% of variability. The second component relates to the oceanic transport indices as PEA and GSI, explaining around 12%, and the third relates to sea level and NAO. ...