Galician and Porcupine Bank Nephrops fishery systems: a comparison from a climate-induced changes perspective
Authors
González-Herraiz, I. (Isabel); Fariña-Pérez, C. (Celso); Sampedro-Pastor, P. (Paz); Torres, M.Á. (María de los Ángeles); Cañás, L. (Lucía)Date
2009-09Type
conference outputKeywords
Nephropsfishery
upwelling
northwestern Spain
Porcupine Bank
North Atlantic Oscillation (NAO)
Atlantic Multidecadal Oscillation (AMO)
time-series analysis
Abstract
Nephrops norvegicus is a valuable resource of the bottom–demersal ecosystems in the Celtic–Biscay shelf and Iberian coastal large marine areas, of which Porcupine Bank and Galician shelf and upper
slope (northwest Spain) are representative, respectively. The catch per unit effort (cpue) of Nephrops fisheries of these areas, considered as an abundance index of populations, decreased in
the Porcupine Bank Spanish bottom fishery and dramatically fell in the Galician fishery. The causes for that decline are not known. In this study, the upwelling, North Atlantic Oscillation and Atlantic
Multidecadal Oscillation indices series were used as proxies to explore and interpret the variability of the cpue time‐series of the two Nephrops populations from the two areas.
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